/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/loops-crafted-1/mono-crafted_7.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 05:06:00,457 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 05:06:00,459 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 05:06:00,484 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 05:06:00,484 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 05:06:00,485 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 05:06:00,486 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 05:06:00,487 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 05:06:00,488 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 05:06:00,505 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 05:06:00,505 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 05:06:00,506 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 05:06:00,506 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 05:06:00,507 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 05:06:00,507 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 05:06:00,508 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 05:06:00,508 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 05:06:00,509 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 05:06:00,510 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 05:06:00,511 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 05:06:00,512 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 05:06:00,513 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 05:06:00,514 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 05:06:00,515 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 05:06:00,517 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 05:06:00,517 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 05:06:00,517 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 05:06:00,518 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 05:06:00,518 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 05:06:00,519 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 05:06:00,519 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 05:06:00,520 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 05:06:00,520 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 05:06:00,521 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 05:06:00,521 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 05:06:00,521 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 05:06:00,522 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 05:06:00,522 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 05:06:00,522 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 05:06:00,523 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 05:06:00,523 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 05:06:00,524 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 05:06:00,537 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 05:06:00,537 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 05:06:00,537 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 05:06:00,537 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 05:06:00,537 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 05:06:00,537 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 05:06:00,537 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 05:06:00,538 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 05:06:00,538 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 05:06:00,538 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 05:06:00,538 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 05:06:00,538 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 05:06:00,538 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 05:06:00,538 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 05:06:00,538 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 05:06:00,538 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 05:06:00,538 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 05:06:00,538 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 05:06:00,539 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 05:06:00,539 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 05:06:00,539 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 05:06:00,539 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 05:06:00,539 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 05:06:00,539 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 05:06:00,539 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 05:06:00,539 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 05:06:00,539 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 05:06:00,539 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 05:06:00,540 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 05:06:00,540 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 05:06:00,540 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 05:06:00,540 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 05:06:00,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 05:06:00,540 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 05:06:00,540 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 05:06:00,540 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 05:06:00,540 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 05:06:00,540 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 05:06:00,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 05:06:00,541 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 05:06:00,541 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 05:06:00,541 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 05:06:00,710 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 05:06:00,744 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 05:06:00,746 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 05:06:00,746 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 05:06:00,747 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 05:06:00,748 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/mono-crafted_7.c [2023-04-01 05:06:01,880 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 05:06:02,066 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 05:06:02,067 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/mono-crafted_7.c [2023-04-01 05:06:02,071 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/066f89581/24864375019847f1a00cea0aab78dbe0/FLAGcb40fd4f5 [2023-04-01 05:06:02,084 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/066f89581/24864375019847f1a00cea0aab78dbe0 [2023-04-01 05:06:02,087 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 05:06:02,088 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 05:06:02,090 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 05:06:02,090 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 05:06:02,093 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 05:06:02,093 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 05:06:02" (1/1) ... [2023-04-01 05:06:02,094 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24714aee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:06:02, skipping insertion in model container [2023-04-01 05:06:02,094 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 05:06:02" (1/1) ... [2023-04-01 05:06:02,099 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 05:06:02,114 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 05:06:02,248 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/loops-crafted-1/mono-crafted_7.c[318,331] [2023-04-01 05:06:02,254 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 05:06:02,260 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 05:06:02,267 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/loops-crafted-1/mono-crafted_7.c[318,331] [2023-04-01 05:06:02,269 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 05:06:02,277 INFO L208 MainTranslator]: Completed translation [2023-04-01 05:06:02,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:06:02 WrapperNode [2023-04-01 05:06:02,277 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 05:06:02,278 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 05:06:02,278 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 05:06:02,278 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 05:06:02,285 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:06:02" (1/1) ... [2023-04-01 05:06:02,285 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:06:02" (1/1) ... [2023-04-01 05:06:02,289 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:06:02" (1/1) ... [2023-04-01 05:06:02,289 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:06:02" (1/1) ... [2023-04-01 05:06:02,291 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:06:02" (1/1) ... [2023-04-01 05:06:02,293 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:06:02" (1/1) ... [2023-04-01 05:06:02,294 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:06:02" (1/1) ... [2023-04-01 05:06:02,294 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:06:02" (1/1) ... [2023-04-01 05:06:02,295 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 05:06:02,295 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 05:06:02,296 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 05:06:02,296 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 05:06:02,296 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:06:02" (1/1) ... [2023-04-01 05:06:02,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 05:06:02,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:06:02,317 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 05:06:02,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 05:06:02,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 05:06:02,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 05:06:02,354 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 05:06:02,355 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 05:06:02,356 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 05:06:02,356 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 05:06:02,356 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 05:06:02,358 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 05:06:02,358 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 05:06:02,359 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 05:06:02,359 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 05:06:02,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 05:06:02,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 05:06:02,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 05:06:02,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 05:06:02,359 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 05:06:02,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 05:06:02,403 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 05:06:02,404 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 05:06:02,498 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 05:06:02,521 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 05:06:02,521 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 05:06:02,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 05:06:02 BoogieIcfgContainer [2023-04-01 05:06:02,523 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 05:06:02,524 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 05:06:02,524 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 05:06:02,526 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 05:06:02,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 05:06:02" (1/3) ... [2023-04-01 05:06:02,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69c432cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 05:06:02, skipping insertion in model container [2023-04-01 05:06:02,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:06:02" (2/3) ... [2023-04-01 05:06:02,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69c432cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 05:06:02, skipping insertion in model container [2023-04-01 05:06:02,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 05:06:02" (3/3) ... [2023-04-01 05:06:02,529 INFO L112 eAbstractionObserver]: Analyzing ICFG mono-crafted_7.c [2023-04-01 05:06:02,556 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 05:06:02,557 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 05:06:02,588 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 05:06:02,593 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;@47b245b5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 05:06:02,593 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 05:06:02,596 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 05:06:02,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 05:06:02,601 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:06:02,602 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:06:02,602 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:06:02,606 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:06:02,606 INFO L85 PathProgramCache]: Analyzing trace with hash 2129081965, now seen corresponding path program 1 times [2023-04-01 05:06:02,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:06:02,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184312193] [2023-04-01 05:06:02,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:06:02,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:06:02,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:06:02,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:06:02,824 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:06:02,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184312193] [2023-04-01 05:06:02,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184312193] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:06:02,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:06:02,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 05:06:02,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041564767] [2023-04-01 05:06:02,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:06:02,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 05:06:02,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:06:02,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 05:06:02,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 05:06:02,874 INFO L87 Difference]: Start difference. First operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:06:02,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:06:02,928 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2023-04-01 05:06:02,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 05:06:02,930 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 05:06:02,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:06:02,934 INFO L225 Difference]: With dead ends: 31 [2023-04-01 05:06:02,934 INFO L226 Difference]: Without dead ends: 13 [2023-04-01 05:06:02,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 05:06:02,938 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 05:06:02,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 05:06:02,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-04-01 05:06:02,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-04-01 05:06:02,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:06:02,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2023-04-01 05:06:02,959 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2023-04-01 05:06:02,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:06:02,959 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2023-04-01 05:06:02,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:06:02,960 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2023-04-01 05:06:02,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-01 05:06:02,960 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:06:02,960 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:06:02,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 05:06:02,960 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:06:02,961 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:06:02,961 INFO L85 PathProgramCache]: Analyzing trace with hash 780476817, now seen corresponding path program 1 times [2023-04-01 05:06:02,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:06:02,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637561802] [2023-04-01 05:06:02,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:06:02,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:06:02,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:06:03,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:06:03,037 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:06:03,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637561802] [2023-04-01 05:06:03,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637561802] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:06:03,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054987756] [2023-04-01 05:06:03,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:06:03,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:06:03,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:06:03,040 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:06:03,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 05:06:03,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:06:03,137 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 05:06:03,140 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:06:03,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:06:03,210 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:06:03,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:06:03,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054987756] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 05:06:03,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:06:03,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2023-04-01 05:06:03,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335276468] [2023-04-01 05:06:03,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:06:03,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 05:06:03,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:06:03,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 05:06:03,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-04-01 05:06:03,342 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:06:03,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:06:03,359 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2023-04-01 05:06:03,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 05:06:03,361 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-04-01 05:06:03,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:06:03,361 INFO L225 Difference]: With dead ends: 19 [2023-04-01 05:06:03,361 INFO L226 Difference]: Without dead ends: 14 [2023-04-01 05:06:03,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-04-01 05:06:03,362 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 05:06:03,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 05:06:03,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-04-01 05:06:03,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2023-04-01 05:06:03,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:06:03,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2023-04-01 05:06:03,366 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2023-04-01 05:06:03,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:06:03,366 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2023-04-01 05:06:03,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:06:03,366 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2023-04-01 05:06:03,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-01 05:06:03,367 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:06:03,367 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:06:03,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 05:06:03,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:06:03,597 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:06:03,597 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:06:03,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1952019340, now seen corresponding path program 1 times [2023-04-01 05:06:03,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:06:03,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446929082] [2023-04-01 05:06:03,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:06:03,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:06:03,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:06:03,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 05:06:03,666 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:06:03,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446929082] [2023-04-01 05:06:03,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446929082] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:06:03,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144040361] [2023-04-01 05:06:03,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:06:03,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:06:03,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:06:03,668 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:06:03,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 05:06:03,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:06:03,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 05:06:03,699 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:06:03,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:06:03,734 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:06:03,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:06:03,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144040361] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:06:03,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [604657693] [2023-04-01 05:06:03,827 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-04-01 05:06:03,827 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:06:03,829 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:06:03,832 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:06:03,832 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:06:03,877 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 05:06:03,935 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2023-04-01 05:06:03,940 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 05:06:03,944 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:06:04,052 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '305#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 05:06:04,052 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:06:04,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 05:06:04,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2023-04-01 05:06:04,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808952555] [2023-04-01 05:06:04,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 05:06:04,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 05:06:04,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:06:04,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 05:06:04,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2023-04-01 05:06:04,055 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:06:04,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:06:04,095 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2023-04-01 05:06:04,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 05:06:04,096 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-04-01 05:06:04,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:06:04,096 INFO L225 Difference]: With dead ends: 25 [2023-04-01 05:06:04,096 INFO L226 Difference]: Without dead ends: 18 [2023-04-01 05:06:04,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2023-04-01 05:06:04,097 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 05:06:04,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 05:06:04,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-04-01 05:06:04,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-04-01 05:06:04,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:06:04,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2023-04-01 05:06:04,100 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2023-04-01 05:06:04,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:06:04,101 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2023-04-01 05:06:04,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:06:04,101 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2023-04-01 05:06:04,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-01 05:06:04,102 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:06:04,102 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:06:04,117 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-01 05:06:04,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-01 05:06:04,306 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:06:04,307 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:06:04,307 INFO L85 PathProgramCache]: Analyzing trace with hash -187518035, now seen corresponding path program 2 times [2023-04-01 05:06:04,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:06:04,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396138155] [2023-04-01 05:06:04,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:06:04,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:06:04,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:06:04,374 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 05:06:04,374 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:06:04,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396138155] [2023-04-01 05:06:04,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396138155] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:06:04,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953163004] [2023-04-01 05:06:04,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 05:06:04,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:06:04,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:06:04,376 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) [2023-04-01 05:06:04,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 05:06:04,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 05:06:04,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 05:06:04,411 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 05:06:04,412 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:06:04,426 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 05:06:04,426 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:06:04,495 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 05:06:04,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953163004] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:06:04,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1217857337] [2023-04-01 05:06:04,497 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-04-01 05:06:04,497 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:06:04,497 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:06:04,497 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:06:04,497 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:06:04,566 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 05:06:04,629 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2023-04-01 05:06:04,634 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 05:06:04,639 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:06:04,741 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '500#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 05:06:04,741 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:06:04,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 05:06:04,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-04-01 05:06:04,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458711076] [2023-04-01 05:06:04,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 05:06:04,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 05:06:04,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:06:04,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 05:06:04,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-04-01 05:06:04,743 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:06:04,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:06:04,765 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2023-04-01 05:06:04,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 05:06:04,766 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-04-01 05:06:04,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:06:04,767 INFO L225 Difference]: With dead ends: 32 [2023-04-01 05:06:04,767 INFO L226 Difference]: Without dead ends: 22 [2023-04-01 05:06:04,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-04-01 05:06:04,768 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 05:06:04,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 05:06:04,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-04-01 05:06:04,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-04-01 05:06:04,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:06:04,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2023-04-01 05:06:04,772 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2023-04-01 05:06:04,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:06:04,772 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2023-04-01 05:06:04,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:06:04,772 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2023-04-01 05:06:04,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 05:06:04,773 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:06:04,773 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:06:04,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 05:06:04,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:06:04,978 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:06:04,978 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:06:04,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1922851667, now seen corresponding path program 3 times [2023-04-01 05:06:04,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:06:04,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254971174] [2023-04-01 05:06:04,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:06:04,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:06:04,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:06:05,121 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 05:06:05,121 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:06:05,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254971174] [2023-04-01 05:06:05,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254971174] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:06:05,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252564675] [2023-04-01 05:06:05,122 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 05:06:05,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:06:05,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:06:05,123 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) [2023-04-01 05:06:05,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 05:06:05,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 05:06:05,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 05:06:05,159 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 05:06:05,160 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:06:05,185 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 05:06:05,185 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:06:05,357 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 05:06:05,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252564675] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:06:05,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1047926953] [2023-04-01 05:06:05,359 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-04-01 05:06:05,359 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:06:05,359 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:06:05,359 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:06:05,359 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:06:05,374 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 05:06:05,410 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2023-04-01 05:06:05,413 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 05:06:05,417 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:06:05,517 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '745#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 05:06:05,518 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:06:05,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 05:06:05,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-04-01 05:06:05,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759430100] [2023-04-01 05:06:05,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 05:06:05,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 05:06:05,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:06:05,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 05:06:05,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=438, Unknown=0, NotChecked=0, Total=600 [2023-04-01 05:06:05,519 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:06:05,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:06:05,543 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2023-04-01 05:06:05,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 05:06:05,544 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-04-01 05:06:05,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:06:05,544 INFO L225 Difference]: With dead ends: 40 [2023-04-01 05:06:05,544 INFO L226 Difference]: Without dead ends: 30 [2023-04-01 05:06:05,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=438, Unknown=0, NotChecked=0, Total=600 [2023-04-01 05:06:05,545 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 05:06:05,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 05:06:05,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-04-01 05:06:05,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-04-01 05:06:05,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:06:05,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2023-04-01 05:06:05,549 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 21 [2023-04-01 05:06:05,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:06:05,549 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2023-04-01 05:06:05,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:06:05,549 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2023-04-01 05:06:05,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 05:06:05,550 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:06:05,550 INFO L195 NwaCegarLoop]: trace histogram [14, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:06:05,569 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-01 05:06:05,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:06:05,754 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:06:05,754 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:06:05,755 INFO L85 PathProgramCache]: Analyzing trace with hash -2098205011, now seen corresponding path program 4 times [2023-04-01 05:06:05,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:06:05,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401792831] [2023-04-01 05:06:05,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:06:05,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:06:05,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:06:06,253 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 05:06:06,254 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:06:06,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401792831] [2023-04-01 05:06:06,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401792831] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:06:06,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918064648] [2023-04-01 05:06:06,254 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 05:06:06,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:06:06,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:06:06,264 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) [2023-04-01 05:06:06,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 05:06:06,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:06:06,305 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-01 05:06:06,307 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:06:06,345 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 05:06:06,345 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:06:06,773 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 05:06:06,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918064648] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:06:06,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1306224527] [2023-04-01 05:06:06,775 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-04-01 05:06:06,775 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:06:06,775 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:06:06,775 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:06:06,776 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:06:06,786 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 05:06:06,816 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2023-04-01 05:06:06,819 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 05:06:06,821 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:06:06,950 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1086#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 05:06:06,951 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:06:06,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 05:06:06,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2023-04-01 05:06:06,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100230348] [2023-04-01 05:06:06,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 05:06:06,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-04-01 05:06:06,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:06:06,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-04-01 05:06:06,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=554, Invalid=1086, Unknown=0, NotChecked=0, Total=1640 [2023-04-01 05:06:06,953 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 33 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:06:06,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:06:06,989 INFO L93 Difference]: Finished difference Result 56 states and 73 transitions. [2023-04-01 05:06:06,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-04-01 05:06:06,990 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2023-04-01 05:06:06,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:06:06,990 INFO L225 Difference]: With dead ends: 56 [2023-04-01 05:06:06,990 INFO L226 Difference]: Without dead ends: 46 [2023-04-01 05:06:06,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=554, Invalid=1086, Unknown=0, NotChecked=0, Total=1640 [2023-04-01 05:06:06,991 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 05:06:06,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 05:06:06,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-04-01 05:06:06,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2023-04-01 05:06:06,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:06:06,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2023-04-01 05:06:06,996 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 29 [2023-04-01 05:06:06,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:06:06,996 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2023-04-01 05:06:06,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:06:06,996 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2023-04-01 05:06:06,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-01 05:06:06,997 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:06:06,997 INFO L195 NwaCegarLoop]: trace histogram [30, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:06:07,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 05:06:07,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:06:07,202 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:06:07,203 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:06:07,203 INFO L85 PathProgramCache]: Analyzing trace with hash -558722387, now seen corresponding path program 5 times [2023-04-01 05:06:07,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:06:07,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626688333] [2023-04-01 05:06:07,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:06:07,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:06:07,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:06:08,189 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 05:06:08,189 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:06:08,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626688333] [2023-04-01 05:06:08,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626688333] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:06:08,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392561494] [2023-04-01 05:06:08,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 05:06:08,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:06:08,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:06:08,191 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) [2023-04-01 05:06:08,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 05:06:08,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2023-04-01 05:06:08,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 05:06:08,277 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 32 conjunts are in the unsatisfiable core [2023-04-01 05:06:08,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:06:08,364 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 05:06:08,364 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:06:09,593 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 05:06:09,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392561494] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:06:09,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1030996748] [2023-04-01 05:06:09,595 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-04-01 05:06:09,596 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:06:09,596 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:06:09,596 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:06:09,596 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:06:09,607 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 05:06:09,633 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2023-04-01 05:06:09,636 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 05:06:09,639 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:06:09,819 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1619#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 05:06:09,819 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:06:09,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 05:06:09,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2023-04-01 05:06:09,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752099327] [2023-04-01 05:06:09,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 05:06:09,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-04-01 05:06:09,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:06:09,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-04-01 05:06:09,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2106, Invalid=3150, Unknown=0, NotChecked=0, Total=5256 [2023-04-01 05:06:09,825 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 65 states, 65 states have (on average 1.1076923076923078) internal successors, (72), 65 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:06:09,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:06:09,903 INFO L93 Difference]: Finished difference Result 88 states and 121 transitions. [2023-04-01 05:06:09,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-04-01 05:06:09,904 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.1076923076923078) internal successors, (72), 65 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2023-04-01 05:06:09,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:06:09,906 INFO L225 Difference]: With dead ends: 88 [2023-04-01 05:06:09,906 INFO L226 Difference]: Without dead ends: 78 [2023-04-01 05:06:09,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2106, Invalid=3150, Unknown=0, NotChecked=0, Total=5256 [2023-04-01 05:06:09,909 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 05:06:09,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 05:06:09,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-04-01 05:06:09,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2023-04-01 05:06:09,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 73 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:06:09,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2023-04-01 05:06:09,923 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 45 [2023-04-01 05:06:09,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:06:09,923 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2023-04-01 05:06:09,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.1076923076923078) internal successors, (72), 65 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:06:09,924 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2023-04-01 05:06:09,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-04-01 05:06:09,926 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:06:09,926 INFO L195 NwaCegarLoop]: trace histogram [62, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:06:09,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 05:06:10,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:06:10,132 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:06:10,132 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:06:10,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1356847789, now seen corresponding path program 6 times [2023-04-01 05:06:10,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:06:10,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586565255] [2023-04-01 05:06:10,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:06:10,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:06:10,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:06:13,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1963 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 05:06:13,566 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:06:13,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586565255] [2023-04-01 05:06:13,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586565255] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:06:13,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720178613] [2023-04-01 05:06:13,566 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 05:06:13,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:06:13,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:06:13,567 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:06:13,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 05:06:13,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 05:06:13,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 05:06:13,678 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 64 conjunts are in the unsatisfiable core [2023-04-01 05:06:13,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:06:13,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1963 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 05:06:13,825 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:06:17,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1963 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 05:06:17,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720178613] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:06:17,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1138796580] [2023-04-01 05:06:17,876 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-04-01 05:06:17,876 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:06:17,876 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:06:17,876 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:06:17,876 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:06:17,907 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 05:06:17,942 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2023-04-01 05:06:17,945 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 05:06:17,948 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:06:18,216 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2536#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 05:06:18,216 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:06:18,216 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 05:06:18,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 129 [2023-04-01 05:06:18,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774944281] [2023-04-01 05:06:18,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 05:06:18,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2023-04-01 05:06:18,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:06:18,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2023-04-01 05:06:18,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8282, Invalid=10350, Unknown=0, NotChecked=0, Total=18632 [2023-04-01 05:06:18,223 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 129 states, 129 states have (on average 1.054263565891473) internal successors, (136), 129 states have internal predecessors, (136), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:06:18,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:06:18,377 INFO L93 Difference]: Finished difference Result 152 states and 217 transitions. [2023-04-01 05:06:18,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2023-04-01 05:06:18,377 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 1.054263565891473) internal successors, (136), 129 states have internal predecessors, (136), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2023-04-01 05:06:18,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:06:18,378 INFO L225 Difference]: With dead ends: 152 [2023-04-01 05:06:18,378 INFO L226 Difference]: Without dead ends: 142 [2023-04-01 05:06:18,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1766 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=8282, Invalid=10350, Unknown=0, NotChecked=0, Total=18632 [2023-04-01 05:06:18,383 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:06:18,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:06:18,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-04-01 05:06:18,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2023-04-01 05:06:18,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 137 states have (on average 1.0145985401459854) internal successors, (139), 137 states have internal predecessors, (139), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:06:18,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 143 transitions. [2023-04-01 05:06:18,391 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 143 transitions. Word has length 77 [2023-04-01 05:06:18,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:06:18,391 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 143 transitions. [2023-04-01 05:06:18,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 1.054263565891473) internal successors, (136), 129 states have internal predecessors, (136), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:06:18,391 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 143 transitions. [2023-04-01 05:06:18,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-04-01 05:06:18,392 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:06:18,392 INFO L195 NwaCegarLoop]: trace histogram [126, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:06:18,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 05:06:18,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:06:18,598 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:06:18,598 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:06:18,598 INFO L85 PathProgramCache]: Analyzing trace with hash -539333971, now seen corresponding path program 7 times [2023-04-01 05:06:18,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:06:18,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201441875] [2023-04-01 05:06:18,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:06:18,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:06:18,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:06:30,158 INFO L134 CoverageAnalysis]: Checked inductivity of 8011 backedges. 0 proven. 8001 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 05:06:30,158 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:06:30,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201441875] [2023-04-01 05:06:30,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201441875] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:06:30,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787211295] [2023-04-01 05:06:30,159 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 05:06:30,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:06:30,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:06:30,168 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:06:30,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 05:06:30,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:06:30,293 INFO L262 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 128 conjunts are in the unsatisfiable core [2023-04-01 05:06:30,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:06:30,534 INFO L134 CoverageAnalysis]: Checked inductivity of 8011 backedges. 0 proven. 8001 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 05:06:30,535 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:06:43,431 INFO L134 CoverageAnalysis]: Checked inductivity of 8011 backedges. 0 proven. 8001 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 05:06:43,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787211295] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:06:43,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [541129534] [2023-04-01 05:06:43,433 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-04-01 05:06:43,433 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:06:43,433 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:06:43,433 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:06:43,433 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:06:43,442 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 05:06:43,468 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2023-04-01 05:06:43,470 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 05:06:43,472 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:06:43,902 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4221#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 05:06:43,902 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:06:43,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 05:06:43,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [129, 129, 129] total 257 [2023-04-01 05:06:43,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548093460] [2023-04-01 05:06:43,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 05:06:43,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 257 states [2023-04-01 05:06:43,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:06:43,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 257 interpolants. [2023-04-01 05:06:43,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32922, Invalid=37038, Unknown=0, NotChecked=0, Total=69960 [2023-04-01 05:06:43,918 INFO L87 Difference]: Start difference. First operand 142 states and 143 transitions. Second operand has 257 states, 257 states have (on average 1.027237354085603) internal successors, (264), 257 states have internal predecessors, (264), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:06:44,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:06:44,398 INFO L93 Difference]: Finished difference Result 280 states and 409 transitions. [2023-04-01 05:06:44,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 256 states. [2023-04-01 05:06:44,399 INFO L78 Accepts]: Start accepts. Automaton has has 257 states, 257 states have (on average 1.027237354085603) internal successors, (264), 257 states have internal predecessors, (264), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 141 [2023-04-01 05:06:44,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:06:44,400 INFO L225 Difference]: With dead ends: 280 [2023-04-01 05:06:44,400 INFO L226 Difference]: Without dead ends: 270 [2023-04-01 05:06:44,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 551 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3558 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=32922, Invalid=37038, Unknown=0, NotChecked=0, Total=69960 [2023-04-01 05:06:44,406 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 05:06:44,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 05:06:44,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2023-04-01 05:06:44,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 270. [2023-04-01 05:06:44,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 265 states have (on average 1.0075471698113208) internal successors, (267), 265 states have internal predecessors, (267), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:06:44,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 271 transitions. [2023-04-01 05:06:44,434 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 271 transitions. Word has length 141 [2023-04-01 05:06:44,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:06:44,434 INFO L495 AbstractCegarLoop]: Abstraction has 270 states and 271 transitions. [2023-04-01 05:06:44,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 257 states, 257 states have (on average 1.027237354085603) internal successors, (264), 257 states have internal predecessors, (264), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:06:44,434 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 271 transitions. [2023-04-01 05:06:44,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2023-04-01 05:06:44,436 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:06:44,436 INFO L195 NwaCegarLoop]: trace histogram [254, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:06:44,451 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-04-01 05:06:44,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-04-01 05:06:44,652 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:06:44,652 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:06:44,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1471182163, now seen corresponding path program 8 times [2023-04-01 05:06:44,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:06:44,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958262448] [2023-04-01 05:06:44,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:06:44,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:06:44,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat