/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/nla-digbench-scaling/ps6-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 23:33:16,589 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 23:33:16,591 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 23:33:16,620 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 23:33:16,621 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 23:33:16,623 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 23:33:16,628 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 23:33:16,631 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 23:33:16,632 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 23:33:16,636 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 23:33:16,638 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 23:33:16,640 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 23:33:16,640 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 23:33:16,644 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 23:33:16,645 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 23:33:16,646 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 23:33:16,646 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 23:33:16,647 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 23:33:16,648 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 23:33:16,649 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 23:33:16,650 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 23:33:16,653 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 23:33:16,654 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 23:33:16,656 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 23:33:16,665 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 23:33:16,667 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 23:33:16,667 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 23:33:16,668 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 23:33:16,668 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 23:33:16,669 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 23:33:16,669 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 23:33:16,670 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 23:33:16,670 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 23:33:16,670 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 23:33:16,671 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 23:33:16,671 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 23:33:16,675 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 23:33:16,706 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 23:33:16,706 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 23:33:16,707 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 23:33:16,707 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 23:33:16,707 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 23:33:16,707 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 23:33:16,707 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 23:33:16,708 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 23:33:16,708 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 23:33:16,708 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 23:33:16,708 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 23:33:16,708 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 23:33:16,708 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 23:33:16,708 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 23:33:16,708 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 23:33:16,709 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 23:33:16,709 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 23:33:16,709 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 23:33:16,709 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 23:33:16,709 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 23:33:16,709 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 23:33:16,710 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 23:33:16,710 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 23:33:16,710 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 23:33:16,710 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 23:33:16,710 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 23:33:16,710 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 23:33:16,710 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 23:33:16,710 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 23:33:16,710 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 23:33:16,711 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 23:33:16,711 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 23:33:16,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:33:16,711 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 23:33:16,711 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 23:33:16,711 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 23:33:16,711 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 23:33:16,711 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 23:33:16,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 23:33:16,712 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 23:33:16,712 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 23:33:16,712 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 23:33:16,936 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 23:33:16,953 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 23:33:16,955 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 23:33:16,956 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 23:33:16,957 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 23:33:16,958 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound5.c [2023-04-02 23:33:17,997 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 23:33:18,129 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 23:33:18,129 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound5.c [2023-04-02 23:33:18,133 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/166c09df1/fe685347fcc74e91955002b6448fdcf3/FLAG0b5106e97 [2023-04-02 23:33:18,145 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/166c09df1/fe685347fcc74e91955002b6448fdcf3 [2023-04-02 23:33:18,147 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 23:33:18,148 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 23:33:18,149 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 23:33:18,149 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 23:33:18,152 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 23:33:18,152 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:33:18" (1/1) ... [2023-04-02 23:33:18,153 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e42b4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:33:18, skipping insertion in model container [2023-04-02 23:33:18,153 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:33:18" (1/1) ... [2023-04-02 23:33:18,159 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 23:33:18,169 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 23:33:18,281 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/nla-digbench-scaling/ps6-ll_valuebound5.c[458,471] [2023-04-02 23:33:18,307 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:33:18,317 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 23:33:18,330 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/nla-digbench-scaling/ps6-ll_valuebound5.c[458,471] [2023-04-02 23:33:18,351 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:33:18,362 INFO L208 MainTranslator]: Completed translation [2023-04-02 23:33:18,362 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:33:18 WrapperNode [2023-04-02 23:33:18,362 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 23:33:18,363 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 23:33:18,363 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 23:33:18,363 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 23:33:18,373 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:33:18" (1/1) ... [2023-04-02 23:33:18,373 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:33:18" (1/1) ... [2023-04-02 23:33:18,379 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:33:18" (1/1) ... [2023-04-02 23:33:18,379 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:33:18" (1/1) ... [2023-04-02 23:33:18,390 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:33:18" (1/1) ... [2023-04-02 23:33:18,393 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:33:18" (1/1) ... [2023-04-02 23:33:18,394 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:33:18" (1/1) ... [2023-04-02 23:33:18,395 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:33:18" (1/1) ... [2023-04-02 23:33:18,399 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 23:33:18,400 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 23:33:18,400 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 23:33:18,400 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 23:33:18,401 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:33:18" (1/1) ... [2023-04-02 23:33:18,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:33:18,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:33:18,430 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 23:33:18,453 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 23:33:18,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 23:33:18,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 23:33:18,475 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 23:33:18,475 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 23:33:18,475 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 23:33:18,475 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 23:33:18,475 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 23:33:18,475 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 23:33:18,475 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 23:33:18,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 23:33:18,476 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2023-04-02 23:33:18,476 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 23:33:18,476 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 23:33:18,476 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 23:33:18,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 23:33:18,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 23:33:18,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 23:33:18,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 23:33:18,477 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 23:33:18,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 23:33:18,542 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 23:33:18,544 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 23:33:18,707 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 23:33:18,736 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 23:33:18,764 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 23:33:18,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:33:18 BoogieIcfgContainer [2023-04-02 23:33:18,768 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 23:33:18,770 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 23:33:18,770 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 23:33:18,773 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 23:33:18,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 11:33:18" (1/3) ... [2023-04-02 23:33:18,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63015bda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:33:18, skipping insertion in model container [2023-04-02 23:33:18,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:33:18" (2/3) ... [2023-04-02 23:33:18,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63015bda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:33:18, skipping insertion in model container [2023-04-02 23:33:18,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:33:18" (3/3) ... [2023-04-02 23:33:18,775 INFO L112 eAbstractionObserver]: Analyzing ICFG ps6-ll_valuebound5.c [2023-04-02 23:33:18,789 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 23:33:18,789 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 23:33:18,839 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 23:33:18,846 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;@36d3e72d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 23:33:18,846 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 23:33:18,850 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-02 23:33:18,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-02 23:33:18,858 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:33:18,861 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:33:18,861 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:33:18,867 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:33:18,867 INFO L85 PathProgramCache]: Analyzing trace with hash 395619074, now seen corresponding path program 1 times [2023-04-02 23:33:18,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:33:18,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254474351] [2023-04-02 23:33:18,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:33:18,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:33:18,955 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:33:18,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [395645534] [2023-04-02 23:33:18,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:33:18,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:33:18,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:33:18,961 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 23:33:18,977 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 23:33:19,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:33:19,070 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2023-04-02 23:33:19,083 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:33:19,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 23:33:19,193 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:33:19,194 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:33:19,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254474351] [2023-04-02 23:33:19,194 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:33:19,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395645534] [2023-04-02 23:33:19,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395645534] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:33:19,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:33:19,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 23:33:19,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300085744] [2023-04-02 23:33:19,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:33:19,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 23:33:19,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:33:19,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 23:33:19,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 23:33:19,225 INFO L87 Difference]: Start difference. First operand has 25 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 23:33:19,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:33:19,412 INFO L93 Difference]: Finished difference Result 51 states and 71 transitions. [2023-04-02 23:33:19,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 23:33:19,414 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 17 [2023-04-02 23:33:19,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:33:19,420 INFO L225 Difference]: With dead ends: 51 [2023-04-02 23:33:19,420 INFO L226 Difference]: Without dead ends: 28 [2023-04-02 23:33:19,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:33:19,425 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 7 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:33:19,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 72 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:33:19,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-04-02 23:33:19,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-04-02 23:33:19,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 23:33:19,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2023-04-02 23:33:19,461 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 17 [2023-04-02 23:33:19,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:33:19,461 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2023-04-02 23:33:19,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 23:33:19,461 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2023-04-02 23:33:19,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-02 23:33:19,463 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:33:19,463 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:33:19,473 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 23:33:19,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-04-02 23:33:19,669 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:33:19,670 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:33:19,670 INFO L85 PathProgramCache]: Analyzing trace with hash 398349892, now seen corresponding path program 1 times [2023-04-02 23:33:19,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:33:19,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205304504] [2023-04-02 23:33:19,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:33:19,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:33:19,703 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:33:19,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [947383230] [2023-04-02 23:33:19,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:33:19,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:33:19,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:33:19,706 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 23:33:19,710 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 23:33:19,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:33:19,760 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2023-04-02 23:33:19,764 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:33:19,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 23:33:19,903 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:33:20,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 23:33:20,145 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:33:20,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205304504] [2023-04-02 23:33:20,145 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:33:20,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947383230] [2023-04-02 23:33:20,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947383230] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:33:20,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1251560830] [2023-04-02 23:33:20,162 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 23:33:20,162 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:33:20,165 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:33:20,169 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:33:20,169 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:33:20,229 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 23:33:20,813 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 63 for LOIs [2023-04-02 23:33:20,936 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 13 for LOIs [2023-04-02 23:33:20,940 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 23:33:20,946 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:33:21,670 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '352#(and (exists ((v_main_~c~0_BEFORE_CALL_9 Int) (v_main_~k~0_BEFORE_CALL_13 Int) (v_main_~y~0_BEFORE_CALL_13 Int) (v_main_~x~0_BEFORE_CALL_13 Int)) (and (or (and (<= 1 |#StackHeapBarrier|) (<= v_main_~k~0_BEFORE_CALL_13 5) (= v_main_~y~0_BEFORE_CALL_13 0) (= v_main_~c~0_BEFORE_CALL_9 0) (= v_main_~x~0_BEFORE_CALL_13 0) (<= 0 v_main_~k~0_BEFORE_CALL_13) (= |#NULL.offset| 0) (= |#NULL.base| 0)) (and (= v_main_~c~0_BEFORE_CALL_9 v_main_~y~0_BEFORE_CALL_13) (<= 1 |#StackHeapBarrier|) (<= 1 (+ |#StackHeapBarrier| v_main_~k~0_BEFORE_CALL_13)) (<= v_main_~y~0_BEFORE_CALL_13 v_main_~k~0_BEFORE_CALL_13) (<= v_main_~k~0_BEFORE_CALL_13 5) (<= v_main_~k~0_BEFORE_CALL_13 (+ v_main_~y~0_BEFORE_CALL_13 4)) (<= v_main_~y~0_BEFORE_CALL_13 6) (<= 1 v_main_~y~0_BEFORE_CALL_13) (<= v_main_~k~0_BEFORE_CALL_13 (+ |#StackHeapBarrier| 4)) (<= (+ v_main_~y~0_BEFORE_CALL_13 v_main_~k~0_BEFORE_CALL_13) 11) (<= v_main_~y~0_BEFORE_CALL_13 (+ 5 |#StackHeapBarrier|)) (<= 0 v_main_~k~0_BEFORE_CALL_13) (<= 2 (+ v_main_~y~0_BEFORE_CALL_13 |#StackHeapBarrier|)) (= |#NULL.offset| 0) (<= 1 (+ v_main_~y~0_BEFORE_CALL_13 v_main_~k~0_BEFORE_CALL_13)) (= |#NULL.base| 0))) (not (= (+ (* 6 (* v_main_~y~0_BEFORE_CALL_13 v_main_~y~0_BEFORE_CALL_13 v_main_~y~0_BEFORE_CALL_13 v_main_~y~0_BEFORE_CALL_13 v_main_~y~0_BEFORE_CALL_13)) (* 2 (* v_main_~y~0_BEFORE_CALL_13 v_main_~y~0_BEFORE_CALL_13 v_main_~y~0_BEFORE_CALL_13 v_main_~y~0_BEFORE_CALL_13 v_main_~y~0_BEFORE_CALL_13 v_main_~y~0_BEFORE_CALL_13)) (* 5 (* v_main_~y~0_BEFORE_CALL_13 v_main_~y~0_BEFORE_CALL_13 v_main_~y~0_BEFORE_CALL_13 v_main_~y~0_BEFORE_CALL_13))) (+ (* v_main_~x~0_BEFORE_CALL_13 12) (* v_main_~y~0_BEFORE_CALL_13 v_main_~y~0_BEFORE_CALL_13)))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 23:33:21,670 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:33:21,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 23:33:21,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2023-04-02 23:33:21,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248453036] [2023-04-02 23:33:21,671 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 23:33:21,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-02 23:33:21,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:33:21,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-02 23:33:21,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2023-04-02 23:33:21,673 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-02 23:33:21,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:33:21,800 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2023-04-02 23:33:21,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 23:33:21,801 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 24 [2023-04-02 23:33:21,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:33:21,802 INFO L225 Difference]: With dead ends: 39 [2023-04-02 23:33:21,802 INFO L226 Difference]: Without dead ends: 35 [2023-04-02 23:33:21,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2023-04-02 23:33:21,805 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 16 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:33:21,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 90 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:33:21,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-04-02 23:33:21,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2023-04-02 23:33:21,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 23:33:21,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2023-04-02 23:33:21,813 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 24 [2023-04-02 23:33:21,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:33:21,813 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2023-04-02 23:33:21,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-02 23:33:21,814 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2023-04-02 23:33:21,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-02 23:33:21,814 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:33:21,815 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:33:21,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 23:33:22,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-04-02 23:33:22,022 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:33:22,023 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:33:22,023 INFO L85 PathProgramCache]: Analyzing trace with hash 2024645172, now seen corresponding path program 1 times [2023-04-02 23:33:22,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:33:22,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939455477] [2023-04-02 23:33:22,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:33:22,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:33:22,036 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:33:22,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1589193579] [2023-04-02 23:33:22,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:33:22,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:33:22,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:33:22,037 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 23:33:22,040 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 23:33:22,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:33:22,093 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-02 23:33:22,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:33:22,231 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 23:33:22,232 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:33:22,493 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:33:22,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939455477] [2023-04-02 23:33:22,494 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:33:22,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589193579] [2023-04-02 23:33:22,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589193579] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:33:22,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [677071098] [2023-04-02 23:33:22,497 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-02 23:33:22,497 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:33:22,497 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:33:22,497 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:33:22,497 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:33:22,518 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 23:33:22,812 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-02 23:33:22,815 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 13 for LOIs [2023-04-02 23:33:22,817 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 23:33:22,821 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:33:23,208 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '645#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 23:33:23,209 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:33:23,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:33:23,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-04-02 23:33:23,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240516394] [2023-04-02 23:33:23,209 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-02 23:33:23,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-02 23:33:23,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:33:23,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-02 23:33:23,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2023-04-02 23:33:23,211 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 10 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-02 23:33:23,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:33:23,358 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2023-04-02 23:33:23,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 23:33:23,359 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 35 [2023-04-02 23:33:23,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:33:23,360 INFO L225 Difference]: With dead ends: 43 [2023-04-02 23:33:23,360 INFO L226 Difference]: Without dead ends: 37 [2023-04-02 23:33:23,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2023-04-02 23:33:23,362 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 12 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:33:23,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 93 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:33:23,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-04-02 23:33:23,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-04-02 23:33:23,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 9 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-02 23:33:23,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2023-04-02 23:33:23,375 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 35 [2023-04-02 23:33:23,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:33:23,376 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2023-04-02 23:33:23,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-02 23:33:23,376 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2023-04-02 23:33:23,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-02 23:33:23,378 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:33:23,378 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:33:23,386 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 23:33:23,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:33:23,586 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:33:23,586 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:33:23,587 INFO L85 PathProgramCache]: Analyzing trace with hash -170934026, now seen corresponding path program 2 times [2023-04-02 23:33:23,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:33:23,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510653730] [2023-04-02 23:33:23,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:33:23,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:33:23,599 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:33:23,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [261118310] [2023-04-02 23:33:23,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 23:33:23,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:33:23,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:33:23,601 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 23:33:23,604 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 23:33:23,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 23:33:23,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 23:33:23,743 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-02 23:33:23,745 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:33:23,877 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-04-02 23:33:23,878 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:33:24,042 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-04-02 23:33:24,042 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:33:24,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510653730] [2023-04-02 23:33:24,043 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:33:24,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261118310] [2023-04-02 23:33:24,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261118310] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:33:24,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [577775011] [2023-04-02 23:33:24,048 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-02 23:33:24,048 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:33:24,049 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:33:24,049 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:33:24,049 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:33:24,066 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 23:33:24,453 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-02 23:33:24,456 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 13 for LOIs [2023-04-02 23:33:24,458 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 23:33:24,461 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:33:25,020 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1046#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 23:33:25,020 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:33:25,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 23:33:25,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2023-04-02 23:33:25,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95130687] [2023-04-02 23:33:25,021 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 23:33:25,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-02 23:33:25,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:33:25,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-02 23:33:25,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2023-04-02 23:33:25,023 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 16 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 9 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) [2023-04-02 23:33:25,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:33:25,445 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2023-04-02 23:33:25,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-02 23:33:25,446 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 9 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) Word has length 42 [2023-04-02 23:33:25,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:33:25,447 INFO L225 Difference]: With dead ends: 55 [2023-04-02 23:33:25,447 INFO L226 Difference]: Without dead ends: 47 [2023-04-02 23:33:25,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 96 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=188, Invalid=1072, Unknown=0, NotChecked=0, Total=1260 [2023-04-02 23:33:25,451 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 16 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:33:25,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 154 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:33:25,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-04-02 23:33:25,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2023-04-02 23:33:25,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 12 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-02 23:33:25,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2023-04-02 23:33:25,475 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 42 [2023-04-02 23:33:25,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:33:25,475 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2023-04-02 23:33:25,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 9 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) [2023-04-02 23:33:25,475 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2023-04-02 23:33:25,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-04-02 23:33:25,479 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:33:25,479 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:33:25,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 23:33:25,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:33:25,685 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:33:25,685 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:33:25,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1677453900, now seen corresponding path program 3 times [2023-04-02 23:33:25,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:33:25,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602360207] [2023-04-02 23:33:25,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:33:25,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:33:25,699 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:33:25,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [326044629] [2023-04-02 23:33:25,700 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 23:33:25,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:33:25,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:33:25,703 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 23:33:25,704 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 23:33:25,750 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 23:33:25,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 23:33:25,752 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 36 conjunts are in the unsatisfiable core [2023-04-02 23:33:25,760 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:33:26,006 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 14 proven. 46 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-04-02 23:33:26,006 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:33:26,321 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 14 proven. 45 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-04-02 23:33:26,322 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:33:26,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602360207] [2023-04-02 23:33:26,322 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:33:26,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326044629] [2023-04-02 23:33:26,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326044629] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:33:26,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1510384908] [2023-04-02 23:33:26,324 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-02 23:33:26,324 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:33:26,325 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:33:26,325 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:33:26,325 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:33:26,341 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 23:33:26,541 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-02 23:33:26,544 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 13 for LOIs [2023-04-02 23:33:26,546 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 23:33:26,550 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:33:27,043 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1628#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 23:33:27,044 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:33:27,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 23:33:27,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2023-04-02 23:33:27,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516906023] [2023-04-02 23:33:27,044 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 23:33:27,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-04-02 23:33:27,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:33:27,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-04-02 23:33:27,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2023-04-02 23:33:27,046 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 22 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 16 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 16 states have call predecessors, (19), 16 states have call successors, (19) [2023-04-02 23:33:27,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:33:27,948 INFO L93 Difference]: Finished difference Result 73 states and 91 transitions. [2023-04-02 23:33:27,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-02 23:33:27,952 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 16 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 16 states have call predecessors, (19), 16 states have call successors, (19) Word has length 63 [2023-04-02 23:33:27,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:33:27,954 INFO L225 Difference]: With dead ends: 73 [2023-04-02 23:33:27,954 INFO L226 Difference]: Without dead ends: 65 [2023-04-02 23:33:27,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 149 SyntacticMatches, 8 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=298, Invalid=1772, Unknown=0, NotChecked=0, Total=2070 [2023-04-02 23:33:27,956 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 37 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 23:33:27,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 267 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 23:33:27,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-04-02 23:33:27,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2023-04-02 23:33:27,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 40 states have (on average 1.025) internal successors, (41), 40 states have internal predecessors, (41), 18 states have call successors, (18), 7 states have call predecessors, (18), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-02 23:33:27,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2023-04-02 23:33:27,976 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 63 [2023-04-02 23:33:27,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:33:27,976 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2023-04-02 23:33:27,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 16 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 16 states have call predecessors, (19), 16 states have call successors, (19) [2023-04-02 23:33:27,977 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2023-04-02 23:33:27,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-04-02 23:33:27,978 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:33:27,978 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 12, 12, 12, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:33:27,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 23:33:28,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:33:28,189 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:33:28,189 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:33:28,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1696052492, now seen corresponding path program 4 times [2023-04-02 23:33:28,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:33:28,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214870349] [2023-04-02 23:33:28,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:33:28,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:33:28,201 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:33:28,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1219606835] [2023-04-02 23:33:28,201 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 23:33:28,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:33:28,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:33:28,203 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:33:28,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 23:33:28,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:33:28,266 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-02 23:33:28,269 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:33:28,514 INFO L134 CoverageAnalysis]: Checked inductivity of 538 backedges. 308 proven. 1 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2023-04-02 23:33:28,515 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:33:28,716 INFO L134 CoverageAnalysis]: Checked inductivity of 538 backedges. 224 proven. 1 refuted. 0 times theorem prover too weak. 313 trivial. 0 not checked. [2023-04-02 23:33:28,716 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:33:28,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214870349] [2023-04-02 23:33:28,716 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:33:28,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219606835] [2023-04-02 23:33:28,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219606835] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:33:28,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [637636965] [2023-04-02 23:33:28,718 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-02 23:33:28,719 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:33:28,719 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:33:28,719 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:33:28,719 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:33:28,732 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 23:33:28,997 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-02 23:33:29,000 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 13 for LOIs [2023-04-02 23:33:29,002 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 23:33:29,005 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:33:29,467 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2536#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 23:33:29,468 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:33:29,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 23:33:29,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2023-04-02 23:33:29,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386383642] [2023-04-02 23:33:29,468 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 23:33:29,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-04-02 23:33:29,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:33:29,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-04-02 23:33:29,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=1115, Unknown=0, NotChecked=0, Total=1482 [2023-04-02 23:33:29,470 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand has 27 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 26 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (31), 26 states have call predecessors, (31), 26 states have call successors, (31) [2023-04-02 23:33:29,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:33:29,533 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2023-04-02 23:33:29,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-02 23:33:29,534 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 26 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (31), 26 states have call predecessors, (31), 26 states have call successors, (31) Word has length 105 [2023-04-02 23:33:29,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:33:29,534 INFO L225 Difference]: With dead ends: 69 [2023-04-02 23:33:29,535 INFO L226 Difference]: Without dead ends: 0 [2023-04-02 23:33:29,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 274 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=367, Invalid=1115, Unknown=0, NotChecked=0, Total=1482 [2023-04-02 23:33:29,537 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:33:29,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 119 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:33:29,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-04-02 23:33:29,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-04-02 23:33:29,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-04-02 23:33:29,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-04-02 23:33:29,538 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 105 [2023-04-02 23:33:29,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:33:29,539 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-04-02 23:33:29,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 26 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (31), 26 states have call predecessors, (31), 26 states have call successors, (31) [2023-04-02 23:33:29,539 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-04-02 23:33:29,539 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-04-02 23:33:29,541 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-02 23:33:29,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-02 23:33:29,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:33:29,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-04-02 23:33:30,309 INFO L899 garLoopResultBuilder]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2023-04-02 23:33:30,309 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line 3) no Hoare annotation was computed. [2023-04-02 23:33:30,309 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 6 8) the Hoare annotation is: true [2023-04-02 23:33:30,309 INFO L899 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 6 8) no Hoare annotation was computed. [2023-04-02 23:33:30,309 INFO L895 garLoopResultBuilder]: At program point L29(line 29) the Hoare annotation is: (let ((.cse0 (<= main_~k~0 5)) (.cse1 (< 4 main_~k~0))) (or (and .cse0 (or (= main_~k~0 3) (< 3 main_~k~0)) (= 276 main_~x~0) (= main_~y~0 3) (= main_~c~0 3)) (and (= main_~x~0 33) (= main_~y~0 2) .cse0 (or (= main_~k~0 2) (< 2 main_~k~0)) (= main_~c~0 2)) (and (= main_~x~0 0) .cse0 (<= 0 main_~k~0) (= main_~c~0 0) (= main_~y~0 0)) (and .cse0 (= main_~y~0 1) (= main_~x~0 1) (< 0 main_~k~0) (= main_~c~0 1)) (and .cse0 (or (= main_~k~0 4) .cse1) (= main_~y~0 4) (= main_~c~0 4) (= 1300 main_~x~0)) (and (<= main_~c~0 5) .cse0 (= 4425 main_~x~0) (= 5 main_~y~0) (<= 5 main_~c~0) .cse1))) [2023-04-02 23:33:30,309 INFO L899 garLoopResultBuilder]: For program point L29-1(lines 28 37) no Hoare annotation was computed. [2023-04-02 23:33:30,309 INFO L895 garLoopResultBuilder]: At program point L28-2(lines 28 37) the Hoare annotation is: (let ((.cse0 (<= main_~k~0 5)) (.cse1 (< 4 main_~k~0))) (or (and .cse0 (or (= main_~k~0 3) (< 3 main_~k~0)) (= 276 main_~x~0) (= main_~y~0 3) (= main_~c~0 3)) (and (= main_~x~0 33) (= main_~y~0 2) .cse0 (or (= main_~k~0 2) (< 2 main_~k~0)) (= main_~c~0 2)) (and (= main_~x~0 0) .cse0 (<= 0 main_~k~0) (= main_~c~0 0) (= main_~y~0 0)) (and .cse0 (= main_~y~0 1) (= main_~x~0 1) (< 0 main_~k~0) (= main_~c~0 1)) (and .cse0 (or (= main_~k~0 4) .cse1) (= main_~y~0 4) (= main_~c~0 4) (= 1300 main_~x~0)) (and (<= main_~c~0 5) .cse0 (= 4425 main_~x~0) (= 5 main_~y~0) (<= 5 main_~c~0) .cse1))) [2023-04-02 23:33:30,310 INFO L895 garLoopResultBuilder]: At program point L28-3(lines 28 37) the Hoare annotation is: (or (and (= main_~x~0 0) (= main_~y~0 0)) (let ((.cse2 (* main_~k~0 main_~y~0)) (.cse0 (+ main_~c~0 1)) (.cse1 (* main_~y~0 main_~y~0))) (and (or (<= main_~k~0 .cse0) (< (+ main_~c~0 2) main_~k~0) (= (+ 4 .cse1 (* main_~y~0 4)) (+ (* main_~k~0 2) .cse2))) (<= main_~k~0 256) (= .cse1 .cse2) (or (= (+ main_~k~0 .cse2) (+ (* main_~y~0 2) .cse1 1)) (<= main_~k~0 main_~c~0) (< .cse0 main_~k~0)) (= (+ (* 2 (* main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0)) (* 6 (* main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0)) (* 5 (* main_~y~0 main_~y~0 main_~y~0 main_~y~0))) (+ (* main_~x~0 12) .cse1)))) (and (<= main_~k~0 1) (= main_~y~0 1) (= main_~x~0 1) (< 0 main_~k~0))) [2023-04-02 23:33:30,310 INFO L899 garLoopResultBuilder]: For program point mainEXIT(lines 17 42) no Hoare annotation was computed. [2023-04-02 23:33:30,310 INFO L899 garLoopResultBuilder]: For program point L22(line 22) no Hoare annotation was computed. [2023-04-02 23:33:30,310 INFO L902 garLoopResultBuilder]: At program point L21(line 21) the Hoare annotation is: true [2023-04-02 23:33:30,310 INFO L895 garLoopResultBuilder]: At program point L21-1(line 21) the Hoare annotation is: (and (<= main_~k~0 5) (<= 0 main_~k~0)) [2023-04-02 23:33:30,310 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 17 42) the Hoare annotation is: true [2023-04-02 23:33:30,310 INFO L899 garLoopResultBuilder]: For program point L40(line 40) no Hoare annotation was computed. [2023-04-02 23:33:30,310 INFO L895 garLoopResultBuilder]: At program point L39(line 39) the Hoare annotation is: (or (and (= main_~x~0 0) (= main_~y~0 0)) (let ((.cse2 (* main_~k~0 main_~y~0)) (.cse0 (+ main_~c~0 1)) (.cse1 (* main_~y~0 main_~y~0))) (and (or (<= main_~k~0 .cse0) (< (+ main_~c~0 2) main_~k~0) (= (+ 4 .cse1 (* main_~y~0 4)) (+ (* main_~k~0 2) .cse2))) (<= main_~k~0 256) (= .cse1 .cse2) (or (= (+ main_~k~0 .cse2) (+ (* main_~y~0 2) .cse1 1)) (<= main_~k~0 main_~c~0) (< .cse0 main_~k~0)) (= (+ (* 2 (* main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0)) (* 6 (* main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0)) (* 5 (* main_~y~0 main_~y~0 main_~y~0 main_~y~0))) (+ (* main_~x~0 12) .cse1)))) (and (<= main_~k~0 1) (= main_~y~0 1) (= main_~x~0 1) (< 0 main_~k~0))) [2023-04-02 23:33:30,310 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(line -1) the Hoare annotation is: true [2023-04-02 23:33:30,310 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2023-04-02 23:33:30,310 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-04-02 23:33:30,311 INFO L902 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2023-04-02 23:33:30,311 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2023-04-02 23:33:30,311 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(line -1) the Hoare annotation is: true [2023-04-02 23:33:30,311 INFO L899 garLoopResultBuilder]: For program point L11(lines 11 12) no Hoare annotation was computed. [2023-04-02 23:33:30,311 INFO L899 garLoopResultBuilder]: For program point L10(lines 10 13) no Hoare annotation was computed. [2023-04-02 23:33:30,311 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 9 15) no Hoare annotation was computed. [2023-04-02 23:33:30,311 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 9 15) the Hoare annotation is: true [2023-04-02 23:33:30,311 INFO L899 garLoopResultBuilder]: For program point L10-2(lines 9 15) no Hoare annotation was computed. [2023-04-02 23:33:30,311 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2023-04-02 23:33:30,313 INFO L445 BasicCegarLoop]: Path program histogram: [4, 1, 1] [2023-04-02 23:33:30,314 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-02 23:33:30,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.04 11:33:30 BoogieIcfgContainer [2023-04-02 23:33:30,332 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-02 23:33:30,332 INFO L158 Benchmark]: Toolchain (without parser) took 12184.52ms. Allocated memory was 194.0MB in the beginning and 386.9MB in the end (delta: 192.9MB). Free memory was 141.4MB in the beginning and 207.9MB in the end (delta: -66.4MB). Peak memory consumption was 128.0MB. Max. memory is 8.0GB. [2023-04-02 23:33:30,333 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 194.0MB. Free memory is still 146.8MB. There was no memory consumed. Max. memory is 8.0GB. [2023-04-02 23:33:30,333 INFO L158 Benchmark]: CACSL2BoogieTranslator took 213.79ms. Allocated memory is still 194.0MB. Free memory was 141.4MB in the beginning and 130.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-04-02 23:33:30,333 INFO L158 Benchmark]: Boogie Preprocessor took 36.13ms. Allocated memory is still 194.0MB. Free memory was 130.9MB in the beginning and 129.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-04-02 23:33:30,333 INFO L158 Benchmark]: RCFGBuilder took 368.31ms. Allocated memory is still 194.0MB. Free memory was 129.2MB in the beginning and 117.4MB in the end (delta: 11.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-04-02 23:33:30,334 INFO L158 Benchmark]: TraceAbstraction took 11562.02ms. Allocated memory was 194.0MB in the beginning and 386.9MB in the end (delta: 192.9MB). Free memory was 116.6MB in the beginning and 207.9MB in the end (delta: -91.3MB). Peak memory consumption was 102.9MB. Max. memory is 8.0GB. [2023-04-02 23:33:30,335 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 194.0MB. Free memory is still 146.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 213.79ms. Allocated memory is still 194.0MB. Free memory was 141.4MB in the beginning and 130.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 36.13ms. Allocated memory is still 194.0MB. Free memory was 130.9MB in the beginning and 129.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 368.31ms. Allocated memory is still 194.0MB. Free memory was 129.2MB in the beginning and 117.4MB in the end (delta: 11.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 11562.02ms. Allocated memory was 194.0MB in the beginning and 386.9MB in the end (delta: 192.9MB). Free memory was 116.6MB in the beginning and 207.9MB in the end (delta: -91.3MB). Peak memory consumption was 102.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 12]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 11.5s, OverallIterations: 6, TraceHistogramMax: 14, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 96 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 88 mSDsluCounter, 795 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 658 mSDsCounter, 85 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 946 IncrementalHoareTripleChecker+Invalid, 1031 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 85 mSolverCounterUnsat, 137 mSDtfsCounter, 946 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 828 GetRequests, 638 SyntacticMatches, 21 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1876 ImplicationChecksByTransitivity, 4.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=64occurred in iteration=5, InterpolantAutomatonStates: 69, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 7 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 41 PreInvPairs, 65 NumberOfFragments, 468 HoareAnnotationTreeSize, 41 FomulaSimplifications, 949 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 12 FomulaSimplificationsInter, 802 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 286 NumberOfCodeBlocks, 276 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 510 ConstructedInterpolants, 0 QuantifiedInterpolants, 2215 SizeOfPredicates, 16 NumberOfNonLiveVariables, 801 ConjunctsInSsa, 135 ConjunctsInUnsatCore, 10 InterpolantComputations, 1 PerfectInterpolantSequences, 1370/1489 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: ((((((((k <= 5 && (k == 3 || 3 < k)) && 276 == x) && y == 3) && c == 3) || ((((x == 33 && y == 2) && k <= 5) && (k == 2 || 2 < k)) && c == 2)) || ((((x == 0 && k <= 5) && 0 <= k) && c == 0) && y == 0)) || ((((k <= 5 && y == 1) && x == 1) && 0 < k) && c == 1)) || ((((k <= 5 && (k == 4 || 4 < k)) && y == 4) && c == 4) && 1300 == x)) || (((((c <= 5 && k <= 5) && 4425 == x) && 5 == y) && 5 <= c) && 4 < k) RESULT: Ultimate proved your program to be correct! [2023-04-02 23:33:30,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...