/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/eca-rers2012/Problem01_label20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 15:58:11,405 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 15:58:11,407 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 15:58:11,448 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 15:58:11,448 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 15:58:11,451 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 15:58:11,453 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 15:58:11,455 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 15:58:11,457 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 15:58:11,461 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 15:58:11,462 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 15:58:11,464 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 15:58:11,464 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 15:58:11,466 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 15:58:11,468 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 15:58:11,469 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 15:58:11,469 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 15:58:11,470 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 15:58:11,472 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 15:58:11,476 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 15:58:11,477 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 15:58:11,478 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 15:58:11,479 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 15:58:11,480 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 15:58:11,488 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 15:58:11,491 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 15:58:11,492 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 15:58:11,493 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 15:58:11,493 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 15:58:11,494 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 15:58:11,494 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 15:58:11,495 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 15:58:11,495 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 15:58:11,495 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 15:58:11,496 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 15:58:11,496 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 15:58:11,498 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-02 15:58:11,526 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 15:58:11,526 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 15:58:11,527 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 15:58:11,527 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 15:58:11,528 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 15:58:11,528 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 15:58:11,528 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 15:58:11,528 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 15:58:11,528 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 15:58:11,529 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 15:58:11,529 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 15:58:11,529 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 15:58:11,529 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 15:58:11,530 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 15:58:11,530 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 15:58:11,530 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 15:58:11,530 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 15:58:11,530 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 15:58:11,531 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 15:58:11,531 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 15:58:11,531 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 15:58:11,531 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 15:58:11,531 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 15:58:11,531 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 15:58:11,531 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 15:58:11,532 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 15:58:11,532 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 15:58:11,532 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 15:58:11,532 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 15:58:11,532 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 15:58:11,532 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 15:58:11,533 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 15:58:11,533 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 15:58:11,533 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 15:58:11,533 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 15:58:11,533 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 15:58:11,533 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 15:58:11,533 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 15:58:11,533 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 15:58:11,534 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 15:58:11,534 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 15:58:11,534 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 15:58:11,721 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 15:58:11,745 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 15:58:11,747 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 15:58:11,748 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 15:58:11,749 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 15:58:11,750 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem01_label20.c [2023-04-02 15:58:12,980 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 15:58:13,221 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 15:58:13,222 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem01_label20.c [2023-04-02 15:58:13,230 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ee0e1781/6f9121a60cfb4019bd35dfbbae1253fa/FLAG910980641 [2023-04-02 15:58:13,252 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ee0e1781/6f9121a60cfb4019bd35dfbbae1253fa [2023-04-02 15:58:13,254 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 15:58:13,255 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 15:58:13,256 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 15:58:13,256 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 15:58:13,259 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 15:58:13,260 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 03:58:13" (1/1) ... [2023-04-02 15:58:13,260 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b3757bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:58:13, skipping insertion in model container [2023-04-02 15:58:13,261 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 03:58:13" (1/1) ... [2023-04-02 15:58:13,272 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 15:58:13,318 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 15:58:13,538 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/eca-rers2012/Problem01_label20.c[14503,14516] [2023-04-02 15:58:13,583 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 15:58:13,592 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 15:58:13,700 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/eca-rers2012/Problem01_label20.c[14503,14516] [2023-04-02 15:58:13,737 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 15:58:13,763 INFO L208 MainTranslator]: Completed translation [2023-04-02 15:58:13,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:58:13 WrapperNode [2023-04-02 15:58:13,764 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 15:58:13,765 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 15:58:13,765 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 15:58:13,765 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 15:58:13,774 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:58:13" (1/1) ... [2023-04-02 15:58:13,775 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:58:13" (1/1) ... [2023-04-02 15:58:13,798 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:58:13" (1/1) ... [2023-04-02 15:58:13,798 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:58:13" (1/1) ... [2023-04-02 15:58:13,829 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:58:13" (1/1) ... [2023-04-02 15:58:13,839 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:58:13" (1/1) ... [2023-04-02 15:58:13,845 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:58:13" (1/1) ... [2023-04-02 15:58:13,849 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:58:13" (1/1) ... [2023-04-02 15:58:13,856 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 15:58:13,857 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 15:58:13,857 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 15:58:13,857 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 15:58:13,858 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:58:13" (1/1) ... [2023-04-02 15:58:13,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 15:58:13,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:58:13,887 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 15:58:13,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 15:58:13,929 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 15:58:13,929 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 15:58:13,929 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 15:58:13,930 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-02 15:58:13,930 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 15:58:13,931 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-02 15:58:13,931 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 15:58:13,931 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 15:58:13,931 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 15:58:13,931 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 15:58:13,931 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 15:58:13,932 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 15:58:13,932 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 15:58:13,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 15:58:13,932 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 15:58:13,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 15:58:13,932 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 15:58:13,932 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 15:58:13,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 15:58:14,022 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 15:58:14,025 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 15:58:14,981 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 15:58:15,218 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 15:58:15,218 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 15:58:15,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 03:58:15 BoogieIcfgContainer [2023-04-02 15:58:15,221 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 15:58:15,223 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 15:58:15,223 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 15:58:15,226 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 15:58:15,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 03:58:13" (1/3) ... [2023-04-02 15:58:15,227 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d3dcd84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 03:58:15, skipping insertion in model container [2023-04-02 15:58:15,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:58:13" (2/3) ... [2023-04-02 15:58:15,227 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d3dcd84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 03:58:15, skipping insertion in model container [2023-04-02 15:58:15,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 03:58:15" (3/3) ... [2023-04-02 15:58:15,229 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem01_label20.c [2023-04-02 15:58:15,244 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 15:58:15,245 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 15:58:15,302 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 15:58:15,309 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;@2cd85144, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 15:58:15,309 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 15:58:15,313 INFO L276 IsEmpty]: Start isEmpty. Operand has 86 states, 78 states have (on average 1.8974358974358974) internal successors, (148), 79 states have internal predecessors, (148), 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) [2023-04-02 15:58:15,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-04-02 15:58:15,324 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:58:15,324 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:58:15,325 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:58:15,331 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:58:15,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1123350936, now seen corresponding path program 1 times [2023-04-02 15:58:15,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:58:15,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668325488] [2023-04-02 15:58:15,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:58:15,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:58:15,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:58:15,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 15:58:15,959 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:58:15,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668325488] [2023-04-02 15:58:15,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668325488] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:58:15,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 15:58:15,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 15:58:15,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924153384] [2023-04-02 15:58:15,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:58:15,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 15:58:15,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:58:16,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 15:58:16,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 15:58:16,012 INFO L87 Difference]: Start difference. First operand has 86 states, 78 states have (on average 1.8974358974358974) internal successors, (148), 79 states have internal predecessors, (148), 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 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 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) [2023-04-02 15:58:16,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:58:16,383 INFO L93 Difference]: Finished difference Result 246 states and 454 transitions. [2023-04-02 15:58:16,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 15:58:16,385 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 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 [2023-04-02 15:58:16,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:58:16,399 INFO L225 Difference]: With dead ends: 246 [2023-04-02 15:58:16,399 INFO L226 Difference]: Without dead ends: 157 [2023-04-02 15:58:16,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 15:58:16,406 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 38 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 15:58:16,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 30 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 15:58:16,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-04-02 15:58:16,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2023-04-02 15:58:16,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 149 states have (on average 1.8926174496644295) internal successors, (282), 149 states have internal predecessors, (282), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-02 15:58:16,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 291 transitions. [2023-04-02 15:58:16,456 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 291 transitions. Word has length 77 [2023-04-02 15:58:16,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:58:16,457 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 291 transitions. [2023-04-02 15:58:16,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 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) [2023-04-02 15:58:16,458 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 291 transitions. [2023-04-02 15:58:16,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-04-02 15:58:16,461 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:58:16,461 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:58:16,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 15:58:16,462 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:58:16,462 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:58:16,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1609376742, now seen corresponding path program 1 times [2023-04-02 15:58:16,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:58:16,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592181433] [2023-04-02 15:58:16,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:58:16,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:58:16,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:58:16,913 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 15:58:16,914 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:58:16,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592181433] [2023-04-02 15:58:16,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592181433] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:58:16,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 15:58:16,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 15:58:16,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796335116] [2023-04-02 15:58:16,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:58:16,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 15:58:16,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:58:16,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 15:58:16,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 15:58:16,918 INFO L87 Difference]: Start difference. First operand 157 states and 291 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 15:58:17,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:58:17,365 INFO L93 Difference]: Finished difference Result 477 states and 896 transitions. [2023-04-02 15:58:17,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 15:58:17,366 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 94 [2023-04-02 15:58:17,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:58:17,369 INFO L225 Difference]: With dead ends: 477 [2023-04-02 15:58:17,369 INFO L226 Difference]: Without dead ends: 325 [2023-04-02 15:58:17,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-02 15:58:17,372 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 251 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 15:58:17,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 49 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 15:58:17,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2023-04-02 15:58:17,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 317. [2023-04-02 15:58:17,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 300 states have (on average 1.6033333333333333) internal successors, (481), 305 states have internal predecessors, (481), 6 states have call successors, (6), 6 states have call predecessors, (6), 10 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2023-04-02 15:58:17,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 507 transitions. [2023-04-02 15:58:17,396 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 507 transitions. Word has length 94 [2023-04-02 15:58:17,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:58:17,396 INFO L495 AbstractCegarLoop]: Abstraction has 317 states and 507 transitions. [2023-04-02 15:58:17,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 15:58:17,397 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 507 transitions. [2023-04-02 15:58:17,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-04-02 15:58:17,400 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:58:17,400 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:58:17,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 15:58:17,400 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:58:17,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:58:17,401 INFO L85 PathProgramCache]: Analyzing trace with hash -689308720, now seen corresponding path program 1 times [2023-04-02 15:58:17,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:58:17,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682940983] [2023-04-02 15:58:17,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:58:17,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:58:17,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:58:17,642 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 15:58:17,643 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:58:17,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682940983] [2023-04-02 15:58:17,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682940983] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 15:58:17,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324790282] [2023-04-02 15:58:17,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:58:17,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:58:17,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:58:17,651 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:58:17,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 15:58:17,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:58:17,768 INFO L262 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 15:58:17,775 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:58:17,908 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 15:58:17,908 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 15:58:17,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324790282] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:58:17,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 15:58:17,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-02 15:58:17,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008652735] [2023-04-02 15:58:17,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:58:17,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 15:58:17,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:58:17,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 15:58:17,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-02 15:58:17,911 INFO L87 Difference]: Start difference. First operand 317 states and 507 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 15:58:18,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:58:18,320 INFO L93 Difference]: Finished difference Result 811 states and 1363 transitions. [2023-04-02 15:58:18,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 15:58:18,321 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 107 [2023-04-02 15:58:18,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:58:18,324 INFO L225 Difference]: With dead ends: 811 [2023-04-02 15:58:18,325 INFO L226 Difference]: Without dead ends: 499 [2023-04-02 15:58:18,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-04-02 15:58:18,328 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 235 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 15:58:18,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 37 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 15:58:18,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2023-04-02 15:58:18,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 475. [2023-04-02 15:58:18,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 450 states have (on average 1.548888888888889) internal successors, (697), 459 states have internal predecessors, (697), 8 states have call successors, (8), 8 states have call predecessors, (8), 16 states have return successors, (44), 7 states have call predecessors, (44), 7 states have call successors, (44) [2023-04-02 15:58:18,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 749 transitions. [2023-04-02 15:58:18,375 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 749 transitions. Word has length 107 [2023-04-02 15:58:18,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:58:18,375 INFO L495 AbstractCegarLoop]: Abstraction has 475 states and 749 transitions. [2023-04-02 15:58:18,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 15:58:18,376 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 749 transitions. [2023-04-02 15:58:18,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-04-02 15:58:18,380 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:58:18,380 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:58:18,387 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-02 15:58:18,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:58:18,587 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:58:18,588 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:58:18,588 INFO L85 PathProgramCache]: Analyzing trace with hash 134385372, now seen corresponding path program 1 times [2023-04-02 15:58:18,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:58:18,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658915384] [2023-04-02 15:58:18,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:58:18,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:58:18,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:58:18,964 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 30 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 15:58:18,964 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:58:18,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658915384] [2023-04-02 15:58:18,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658915384] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 15:58:18,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499804408] [2023-04-02 15:58:18,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:58:18,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:58:18,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:58:18,969 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:58:18,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 15:58:19,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:58:19,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 15:58:19,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:58:19,243 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-02 15:58:19,244 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 15:58:19,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499804408] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:58:19,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 15:58:19,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-02 15:58:19,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302761646] [2023-04-02 15:58:19,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:58:19,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 15:58:19,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:58:19,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 15:58:19,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 15:58:19,251 INFO L87 Difference]: Start difference. First operand 475 states and 749 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 15:58:19,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:58:19,498 INFO L93 Difference]: Finished difference Result 1336 states and 2181 transitions. [2023-04-02 15:58:19,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 15:58:19,498 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 113 [2023-04-02 15:58:19,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:58:19,503 INFO L225 Difference]: With dead ends: 1336 [2023-04-02 15:58:19,503 INFO L226 Difference]: Without dead ends: 866 [2023-04-02 15:58:19,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 15:58:19,506 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 27 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 15:58:19,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 40 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 15:58:19,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2023-04-02 15:58:19,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 789. [2023-04-02 15:58:19,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 749 states have (on average 1.506008010680908) internal successors, (1128), 765 states have internal predecessors, (1128), 12 states have call successors, (12), 12 states have call predecessors, (12), 27 states have return successors, (92), 11 states have call predecessors, (92), 11 states have call successors, (92) [2023-04-02 15:58:19,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 1232 transitions. [2023-04-02 15:58:19,535 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 1232 transitions. Word has length 113 [2023-04-02 15:58:19,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:58:19,535 INFO L495 AbstractCegarLoop]: Abstraction has 789 states and 1232 transitions. [2023-04-02 15:58:19,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 15:58:19,536 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 1232 transitions. [2023-04-02 15:58:19,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-04-02 15:58:19,540 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:58:19,540 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:58:19,546 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-02 15:58:19,746 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,SelfDestructingSolverStorable3 [2023-04-02 15:58:19,747 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:58:19,747 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:58:19,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1722290688, now seen corresponding path program 1 times [2023-04-02 15:58:19,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:58:19,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143572113] [2023-04-02 15:58:19,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:58:19,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:58:19,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:58:20,165 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 47 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 15:58:20,168 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:58:20,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143572113] [2023-04-02 15:58:20,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143572113] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 15:58:20,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435442757] [2023-04-02 15:58:20,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:58:20,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:58:20,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:58:20,171 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:58:20,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 15:58:20,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:58:20,289 INFO L262 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 15:58:20,292 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:58:20,386 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-02 15:58:20,386 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 15:58:20,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435442757] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:58:20,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 15:58:20,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-02 15:58:20,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103797316] [2023-04-02 15:58:20,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:58:20,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 15:58:20,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:58:20,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 15:58:20,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 15:58:20,388 INFO L87 Difference]: Start difference. First operand 789 states and 1232 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 15:58:20,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:58:20,658 INFO L93 Difference]: Finished difference Result 1962 states and 3145 transitions. [2023-04-02 15:58:20,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 15:58:20,659 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 130 [2023-04-02 15:58:20,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:58:20,666 INFO L225 Difference]: With dead ends: 1962 [2023-04-02 15:58:20,666 INFO L226 Difference]: Without dead ends: 1178 [2023-04-02 15:58:20,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 15:58:20,669 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 15 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 15:58:20,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 34 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 15:58:20,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2023-04-02 15:58:20,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 1101. [2023-04-02 15:58:20,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 1047 states have (on average 1.4479465138490926) internal successors, (1516), 1069 states have internal predecessors, (1516), 16 states have call successors, (16), 16 states have call predecessors, (16), 37 states have return successors, (159), 15 states have call predecessors, (159), 15 states have call successors, (159) [2023-04-02 15:58:20,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 1691 transitions. [2023-04-02 15:58:20,714 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 1691 transitions. Word has length 130 [2023-04-02 15:58:20,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:58:20,715 INFO L495 AbstractCegarLoop]: Abstraction has 1101 states and 1691 transitions. [2023-04-02 15:58:20,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 15:58:20,715 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 1691 transitions. [2023-04-02 15:58:20,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-04-02 15:58:20,719 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:58:20,719 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:58:20,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 15:58:20,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:58:20,926 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:58:20,926 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:58:20,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1404854706, now seen corresponding path program 1 times [2023-04-02 15:58:20,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:58:20,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679889548] [2023-04-02 15:58:20,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:58:20,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:58:20,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:58:21,091 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 79 proven. 19 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-02 15:58:21,091 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:58:21,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679889548] [2023-04-02 15:58:21,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679889548] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 15:58:21,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025281903] [2023-04-02 15:58:21,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:58:21,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:58:21,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:58:21,093 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:58:21,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 15:58:21,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:58:21,248 INFO L262 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 15:58:21,255 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:58:21,314 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 62 proven. 2 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-04-02 15:58:21,315 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:58:21,439 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 79 proven. 19 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-02 15:58:21,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025281903] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:58:21,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2116833913] [2023-04-02 15:58:21,466 INFO L159 IcfgInterpreter]: Started Sifa with 81 locations of interest [2023-04-02 15:58:21,466 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:58:21,470 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:58:21,474 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:58:21,475 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:58:21,710 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 72 for LOIs [2023-04-02 15:58:41,992 WARN L223 SmtUtils]: Spent 17.53s on a formula simplification that was a NOOP. DAG size: 1347 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-02 15:59:10,261 WARN L223 SmtUtils]: Spent 17.27s on a formula simplification that was a NOOP. DAG size: 1347 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-02 16:00:40,964 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 21998 conjuctions. This might take some time... [2023-04-02 16:01:05,949 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 21998 conjuctions.