/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/loop-invariants/linear-inequality-inv-a.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 22:27:28,557 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 22:27:28,560 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 22:27:28,591 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 22:27:28,591 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 22:27:28,593 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 22:27:28,596 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 22:27:28,597 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 22:27:28,598 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 22:27:28,605 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 22:27:28,606 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 22:27:28,606 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 22:27:28,607 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 22:27:28,607 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 22:27:28,608 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 22:27:28,608 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 22:27:28,609 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 22:27:28,609 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 22:27:28,610 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 22:27:28,611 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 22:27:28,611 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 22:27:28,613 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 22:27:28,614 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 22:27:28,615 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 22:27:28,620 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 22:27:28,621 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 22:27:28,622 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 22:27:28,622 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 22:27:28,622 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 22:27:28,623 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 22:27:28,623 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 22:27:28,623 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 22:27:28,624 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 22:27:28,624 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 22:27:28,624 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 22:27:28,625 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 22:27:28,628 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-02 22:27:28,651 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 22:27:28,652 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 22:27:28,652 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 22:27:28,652 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 22:27:28,652 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 22:27:28,652 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 22:27:28,653 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 22:27:28,653 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 22:27:28,653 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 22:27:28,653 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 22:27:28,653 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 22:27:28,653 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 22:27:28,653 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 22:27:28,653 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 22:27:28,653 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 22:27:28,653 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 22:27:28,653 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 22:27:28,653 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 22:27:28,654 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 22:27:28,654 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 22:27:28,654 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 22:27:28,654 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 22:27:28,654 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 22:27:28,654 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 22:27:28,654 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 22:27:28,654 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 22:27:28,655 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 22:27:28,655 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 22:27:28,655 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 22:27:28,655 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 22:27:28,655 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 22:27:28,655 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 22:27:28,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 22:27:28,655 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 22:27:28,655 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 22:27:28,655 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 22:27:28,656 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 22:27:28,656 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 22:27:28,656 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 22:27:28,656 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 22:27:28,656 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 22:27:28,656 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 22:27:28,839 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 22:27:28,871 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 22:27:28,873 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 22:27:28,874 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 22:27:28,875 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 22:27:28,877 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-invariants/linear-inequality-inv-a.c [2023-04-02 22:27:30,021 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 22:27:30,175 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 22:27:30,176 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invariants/linear-inequality-inv-a.c [2023-04-02 22:27:30,184 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff6a45078/34e925647b9441008f85818f9ef977e0/FLAGaffa1fb8c [2023-04-02 22:27:30,193 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff6a45078/34e925647b9441008f85818f9ef977e0 [2023-04-02 22:27:30,195 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 22:27:30,196 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 22:27:30,196 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 22:27:30,196 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 22:27:30,199 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 22:27:30,199 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 10:27:30" (1/1) ... [2023-04-02 22:27:30,200 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dbe85b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:27:30, skipping insertion in model container [2023-04-02 22:27:30,200 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 10:27:30" (1/1) ... [2023-04-02 22:27:30,205 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 22:27:30,212 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 22:27:30,312 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/loop-invariants/linear-inequality-inv-a.c[557,570] [2023-04-02 22:27:30,315 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/loop-invariants/linear-inequality-inv-a.c[613,626] [2023-04-02 22:27:30,316 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 22:27:30,322 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 22:27:30,331 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/loop-invariants/linear-inequality-inv-a.c[557,570] [2023-04-02 22:27:30,331 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/loop-invariants/linear-inequality-inv-a.c[613,626] [2023-04-02 22:27:30,332 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 22:27:30,340 INFO L208 MainTranslator]: Completed translation [2023-04-02 22:27:30,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:27:30 WrapperNode [2023-04-02 22:27:30,341 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 22:27:30,341 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 22:27:30,342 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 22:27:30,342 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 22:27:30,351 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:27:30" (1/1) ... [2023-04-02 22:27:30,351 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:27:30" (1/1) ... [2023-04-02 22:27:30,355 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:27:30" (1/1) ... [2023-04-02 22:27:30,355 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:27:30" (1/1) ... [2023-04-02 22:27:30,358 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:27:30" (1/1) ... [2023-04-02 22:27:30,360 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:27:30" (1/1) ... [2023-04-02 22:27:30,361 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:27:30" (1/1) ... [2023-04-02 22:27:30,361 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:27:30" (1/1) ... [2023-04-02 22:27:30,362 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 22:27:30,363 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 22:27:30,363 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 22:27:30,363 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 22:27:30,363 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:27:30" (1/1) ... [2023-04-02 22:27:30,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 22:27:30,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:27:30,387 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 22:27:30,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 22:27:30,422 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 22:27:30,422 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 22:27:30,423 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 22:27:30,423 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 22:27:30,423 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 22:27:30,423 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 22:27:30,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 22:27:30,423 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-02 22:27:30,423 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 22:27:30,423 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 22:27:30,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 22:27:30,423 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 22:27:30,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 22:27:30,424 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 22:27:30,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 22:27:30,486 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 22:27:30,488 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 22:27:30,645 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 22:27:30,657 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 22:27:30,657 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 22:27:30,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 10:27:30 BoogieIcfgContainer [2023-04-02 22:27:30,659 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 22:27:30,660 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 22:27:30,660 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 22:27:30,662 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 22:27:30,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 10:27:30" (1/3) ... [2023-04-02 22:27:30,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68a47075 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 10:27:30, skipping insertion in model container [2023-04-02 22:27:30,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:27:30" (2/3) ... [2023-04-02 22:27:30,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68a47075 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 10:27:30, skipping insertion in model container [2023-04-02 22:27:30,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 10:27:30" (3/3) ... [2023-04-02 22:27:30,664 INFO L112 eAbstractionObserver]: Analyzing ICFG linear-inequality-inv-a.c [2023-04-02 22:27:30,692 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 22:27:30,692 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-04-02 22:27:30,745 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 22:27:30,750 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;@66708f54, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 22:27:30,750 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-04-02 22:27:30,753 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 10 states have (on average 1.6) internal successors, (16), 12 states have internal predecessors, (16), 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) [2023-04-02 22:27:30,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-04-02 22:27:30,758 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:27:30,759 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:27:30,759 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:27:30,763 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:27:30,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1975456255, now seen corresponding path program 1 times [2023-04-02 22:27:30,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:27:30,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861732118] [2023-04-02 22:27:30,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:27:30,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:27:30,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:27:30,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:27:30,979 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:27:30,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861732118] [2023-04-02 22:27:30,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861732118] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:27:30,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 22:27:30,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 22:27:30,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615461012] [2023-04-02 22:27:30,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:27:30,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 22:27:30,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:27:31,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 22:27:31,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 22:27:31,005 INFO L87 Difference]: Start difference. First operand has 17 states, 10 states have (on average 1.6) internal successors, (16), 12 states have internal predecessors, (16), 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 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2023-04-02 22:27:31,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:27:31,027 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2023-04-02 22:27:31,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 22:27:31,030 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 9 [2023-04-02 22:27:31,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:27:31,035 INFO L225 Difference]: With dead ends: 28 [2023-04-02 22:27:31,035 INFO L226 Difference]: Without dead ends: 14 [2023-04-02 22:27:31,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 22:27:31,040 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:27:31,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:27:31,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-04-02 22:27:31,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2023-04-02 22:27:31,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 10 states have internal predecessors, (11), 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) [2023-04-02 22:27:31,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2023-04-02 22:27:31,063 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 9 [2023-04-02 22:27:31,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:27:31,063 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2023-04-02 22:27:31,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2023-04-02 22:27:31,063 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2023-04-02 22:27:31,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-04-02 22:27:31,064 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:27:31,064 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:27:31,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 22:27:31,064 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:27:31,065 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:27:31,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1110270621, now seen corresponding path program 1 times [2023-04-02 22:27:31,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:27:31,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139775877] [2023-04-02 22:27:31,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:27:31,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:27:31,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:27:31,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:27:31,203 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:27:31,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139775877] [2023-04-02 22:27:31,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139775877] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 22:27:31,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399899361] [2023-04-02 22:27:31,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:27:31,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:27:31,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:27:31,210 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:27:31,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 22:27:31,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:27:31,292 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 22:27:31,295 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:27:31,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:27:31,329 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:27:31,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:27:31,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399899361] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:27:31,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [545918950] [2023-04-02 22:27:31,563 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-04-02 22:27:31,563 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:27:31,569 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:27:31,572 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:27:31,573 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:27:31,640 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:27:31,671 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:27:31,676 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:27:31,804 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '141#(and (<= 1 |#StackHeapBarrier|) (<= (mod main_~n~0 256) (mod main_~i~0 4294967296)) (<= 0 main_~i~0) (< (mod main_~s~0 4294967296) (mod main_~v~0 256)) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 22:27:31,805 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:27:31,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 22:27:31,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-02 22:27:31,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640160212] [2023-04-02 22:27:31,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 22:27:31,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 22:27:31,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:27:31,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 22:27:31,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-04-02 22:27:31,814 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 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) [2023-04-02 22:27:31,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:27:31,878 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2023-04-02 22:27:31,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 22:27:31,879 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 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 10 [2023-04-02 22:27:31,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:27:31,880 INFO L225 Difference]: With dead ends: 31 [2023-04-02 22:27:31,880 INFO L226 Difference]: Without dead ends: 25 [2023-04-02 22:27:31,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-04-02 22:27:31,884 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 23 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:27:31,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 22 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:27:31,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-04-02 22:27:31,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 18. [2023-04-02 22:27:31,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 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) [2023-04-02 22:27:31,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2023-04-02 22:27:31,894 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 10 [2023-04-02 22:27:31,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:27:31,894 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2023-04-02 22:27:31,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 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) [2023-04-02 22:27:31,894 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2023-04-02 22:27:31,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-02 22:27:31,895 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:27:31,895 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:27:31,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 22:27:32,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:27:32,103 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:27:32,103 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:27:32,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1838908962, now seen corresponding path program 1 times [2023-04-02 22:27:32,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:27:32,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021639318] [2023-04-02 22:27:32,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:27:32,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:27:32,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:27:32,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:27:32,244 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:27:32,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021639318] [2023-04-02 22:27:32,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021639318] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 22:27:32,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832147131] [2023-04-02 22:27:32,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:27:32,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:27:32,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:27:32,246 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:27:32,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 22:27:32,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:27:32,317 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 22:27:32,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:27:32,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:27:32,365 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:27:32,721 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:27:32,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832147131] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:27:32,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1647318331] [2023-04-02 22:27:32,723 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-04-02 22:27:32,723 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:27:32,723 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:27:32,723 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:27:32,723 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:27:32,742 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:27:32,760 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:27:32,764 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:27:32,905 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '295#(and (<= 1 |#StackHeapBarrier|) (<= (mod main_~n~0 256) (mod main_~i~0 4294967296)) (< 65025 (mod main_~s~0 4294967296)) (<= 0 main_~i~0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 22:27:32,905 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:27:32,905 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 22:27:32,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-04-02 22:27:32,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950751232] [2023-04-02 22:27:32,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 22:27:32,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 22:27:32,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:27:32,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 22:27:32,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-04-02 22:27:32,907 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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) [2023-04-02 22:27:32,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:27:32,991 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2023-04-02 22:27:32,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 22:27:32,991 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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 12 [2023-04-02 22:27:32,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:27:32,991 INFO L225 Difference]: With dead ends: 29 [2023-04-02 22:27:32,992 INFO L226 Difference]: Without dead ends: 21 [2023-04-02 22:27:32,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-04-02 22:27:32,993 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 8 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 22:27:32,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 21 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 22:27:32,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-04-02 22:27:32,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2023-04-02 22:27:32,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 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) [2023-04-02 22:27:32,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2023-04-02 22:27:32,996 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2023-04-02 22:27:32,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:27:32,997 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2023-04-02 22:27:32,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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) [2023-04-02 22:27:32,997 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2023-04-02 22:27:32,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-02 22:27:32,997 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:27:32,997 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:27:33,010 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-02 22:27:33,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-02 22:27:33,202 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:27:33,203 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:27:33,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1193101695, now seen corresponding path program 2 times [2023-04-02 22:27:33,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:27:33,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89520421] [2023-04-02 22:27:33,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:27:33,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:27:33,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:27:33,317 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:27:33,317 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:27:33,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89520421] [2023-04-02 22:27:33,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89520421] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 22:27:33,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031861377] [2023-04-02 22:27:33,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 22:27:33,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:27:33,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:27:33,319 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:27:33,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 22:27:33,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 22:27:33,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 22:27:33,373 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-02 22:27:33,374 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:27:33,415 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:27:33,416 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:27:38,888 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:27:38,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031861377] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:27:38,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [729191791] [2023-04-02 22:27:38,889 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-04-02 22:27:38,889 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:27:38,890 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:27:38,890 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:27:38,890 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:27:38,906 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:27:38,921 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:27:38,924 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:27:39,039 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '461#(and (<= 1 |#StackHeapBarrier|) (<= (mod main_~n~0 256) (mod main_~i~0 4294967296)) (<= 0 main_~i~0) (< (mod main_~s~0 4294967296) (mod main_~v~0 256)) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 22:27:39,039 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:27:39,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 22:27:39,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-04-02 22:27:39,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611642296] [2023-04-02 22:27:39,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 22:27:39,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-02 22:27:39,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:27:39,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-02 22:27:39,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2023-04-02 22:27:39,041 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 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) [2023-04-02 22:27:39,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:27:39,397 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2023-04-02 22:27:39,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-02 22:27:39,398 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 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 13 [2023-04-02 22:27:39,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:27:39,399 INFO L225 Difference]: With dead ends: 43 [2023-04-02 22:27:39,399 INFO L226 Difference]: Without dead ends: 39 [2023-04-02 22:27:39,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=185, Invalid=517, Unknown=0, NotChecked=0, Total=702 [2023-04-02 22:27:39,400 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 44 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 22:27:39,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 31 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 22:27:39,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-04-02 22:27:39,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2023-04-02 22:27:39,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 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) [2023-04-02 22:27:39,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-04-02 22:27:39,405 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 13 [2023-04-02 22:27:39,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:27:39,405 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-04-02 22:27:39,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 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) [2023-04-02 22:27:39,405 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-04-02 22:27:39,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-02 22:27:39,406 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:27:39,406 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:27:39,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 22:27:39,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:27:39,628 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:27:39,630 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:27:39,630 INFO L85 PathProgramCache]: Analyzing trace with hash 793239902, now seen corresponding path program 2 times [2023-04-02 22:27:39,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:27:39,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75821472] [2023-04-02 22:27:39,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:27:39,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:27:39,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:27:39,810 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:27:39,810 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:27:39,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75821472] [2023-04-02 22:27:39,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75821472] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 22:27:39,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799454264] [2023-04-02 22:27:39,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 22:27:39,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:27:39,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:27:39,812 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:27:39,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 22:27:39,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-02 22:27:39,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 22:27:39,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2023-04-02 22:27:39,887 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:27:39,939 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:27:39,939 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:27:43,680 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:27:43,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799454264] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:27:43,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [857673556] [2023-04-02 22:27:43,682 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-04-02 22:27:43,682 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:27:43,682 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:27:43,682 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:27:43,682 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:27:43,700 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:27:43,716 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:27:43,719 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:27:43,841 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '689#(and (<= 1 |#StackHeapBarrier|) (<= (mod main_~n~0 256) (mod main_~i~0 4294967296)) (< 65025 (mod main_~s~0 4294967296)) (<= 0 main_~i~0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 22:27:43,842 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:27:43,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 22:27:43,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-04-02 22:27:43,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676688254] [2023-04-02 22:27:43,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 22:27:43,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-02 22:27:43,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:27:43,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-02 22:27:43,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2023-04-02 22:27:43,843 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 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) [2023-04-02 22:27:44,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:27:44,136 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2023-04-02 22:27:44,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-02 22:27:44,137 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 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 16 [2023-04-02 22:27:44,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:27:44,138 INFO L225 Difference]: With dead ends: 45 [2023-04-02 22:27:44,138 INFO L226 Difference]: Without dead ends: 31 [2023-04-02 22:27:44,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2023-04-02 22:27:44,139 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 32 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 22:27:44,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 27 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 22:27:44,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-04-02 22:27:44,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2023-04-02 22:27:44,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 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) [2023-04-02 22:27:44,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2023-04-02 22:27:44,144 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 16 [2023-04-02 22:27:44,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:27:44,149 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2023-04-02 22:27:44,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 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) [2023-04-02 22:27:44,149 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2023-04-02 22:27:44,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-02 22:27:44,150 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:27:44,150 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:27:44,156 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-02 22:27:44,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:27:44,354 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:27:44,354 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:27:44,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1293019969, now seen corresponding path program 3 times [2023-04-02 22:27:44,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:27:44,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606899943] [2023-04-02 22:27:44,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:27:44,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:27:44,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:27:44,666 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:27:44,666 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:27:44,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606899943] [2023-04-02 22:27:44,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606899943] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 22:27:44,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834635508] [2023-04-02 22:27:44,666 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 22:27:44,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:27:44,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:27:44,668 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:27:44,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 22:27:44,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 22:27:44,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 22:27:44,733 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 23 conjunts are in the unsatisfiable core [2023-04-02 22:27:44,734 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:27:44,795 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:27:44,795 INFO L327 TraceCheckSpWp]: Computing backward predicates...