/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/array-examples/standard_strcpy_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 02:41:43,544 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 02:41:43,546 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 02:41:43,588 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 02:41:43,605 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 02:41:43,608 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 02:41:43,609 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 02:41:43,610 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 02:41:43,611 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 02:41:43,611 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 02:41:43,613 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 02:41:43,618 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 02:41:43,619 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 02:41:43,620 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 02:41:43,621 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 02:41:43,623 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 02:41:43,630 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 02:41:43,633 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 02:41:43,634 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 02:41:43,635 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 02:41:43,636 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 02:41:43,637 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 02:41:43,637 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 02:41:43,637 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 02:41:43,637 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 02:41:43,638 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 02:41:43,638 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 02:41:43,639 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 02:41:43,639 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 02:41:43,668 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 02:41:43,668 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 02:41:43,669 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 02:41:43,669 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 02:41:43,670 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 02:41:43,670 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 02:41:43,670 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 02:41:43,670 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 02:41:43,670 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 02:41:43,670 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 02:41:43,671 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 02:41:43,671 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 02:41:43,671 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 02:41:43,671 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 02:41:43,671 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 02:41:43,672 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 02:41:43,672 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 02:41:43,672 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 02:41:43,672 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 02:41:43,672 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 02:41:43,673 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 02:41:43,673 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 02:41:43,673 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 02:41:43,673 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 02:41:43,673 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 02:41:43,673 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 02:41:43,673 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 02:41:43,673 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 02:41:43,673 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 02:41:43,674 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 02:41:43,674 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 02:41:43,674 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 02:41:43,674 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 02:41:43,674 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 02:41:43,674 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 02:41:43,675 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 02:41:43,675 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 02:41:43,675 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 02:41:43,675 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 02:41:43,675 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 02:41:43,675 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 02:41:43,675 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 02:41:43,910 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 02:41:43,938 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 02:41:43,940 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 02:41:43,942 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 02:41:43,942 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 02:41:43,943 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_strcpy_ground-1.i [2023-04-01 02:41:45,090 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 02:41:45,291 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 02:41:45,292 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_strcpy_ground-1.i [2023-04-01 02:41:45,298 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f17697d6/662c40ce2dd74781bf45eb86e0b1d539/FLAGe85f16e2b [2023-04-01 02:41:45,317 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f17697d6/662c40ce2dd74781bf45eb86e0b1d539 [2023-04-01 02:41:45,319 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 02:41:45,321 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 02:41:45,324 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 02:41:45,324 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 02:41:45,327 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 02:41:45,328 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 02:41:45" (1/1) ... [2023-04-01 02:41:45,330 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20e77136 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:41:45, skipping insertion in model container [2023-04-01 02:41:45,330 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 02:41:45" (1/1) ... [2023-04-01 02:41:45,338 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 02:41:45,353 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 02:41:45,463 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_strcpy_ground-1.i[853,866] [2023-04-01 02:41:45,476 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 02:41:45,483 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 02:41:45,492 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_strcpy_ground-1.i[853,866] [2023-04-01 02:41:45,498 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 02:41:45,515 INFO L208 MainTranslator]: Completed translation [2023-04-01 02:41:45,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:41:45 WrapperNode [2023-04-01 02:41:45,516 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 02:41:45,517 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 02:41:45,517 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 02:41:45,517 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 02:41:45,526 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:41:45" (1/1) ... [2023-04-01 02:41:45,526 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:41:45" (1/1) ... [2023-04-01 02:41:45,532 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:41:45" (1/1) ... [2023-04-01 02:41:45,532 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:41:45" (1/1) ... [2023-04-01 02:41:45,538 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:41:45" (1/1) ... [2023-04-01 02:41:45,541 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:41:45" (1/1) ... [2023-04-01 02:41:45,542 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:41:45" (1/1) ... [2023-04-01 02:41:45,543 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:41:45" (1/1) ... [2023-04-01 02:41:45,545 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 02:41:45,546 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 02:41:45,546 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 02:41:45,546 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 02:41:45,547 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:41:45" (1/1) ... [2023-04-01 02:41:45,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 02:41:45,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:41:45,574 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 02:41:45,580 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 02:41:45,616 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 02:41:45,616 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 02:41:45,616 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 02:41:45,616 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 02:41:45,616 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 02:41:45,616 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 02:41:45,617 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 02:41:45,617 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 02:41:45,617 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 02:41:45,617 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 02:41:45,617 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 02:41:45,617 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 02:41:45,617 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 02:41:45,617 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 02:41:45,618 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 02:41:45,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 02:41:45,618 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 02:41:45,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 02:41:45,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 02:41:45,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 02:41:45,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 02:41:45,678 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 02:41:45,680 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 02:41:45,844 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 02:41:45,879 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 02:41:45,879 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 02:41:45,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 02:41:45 BoogieIcfgContainer [2023-04-01 02:41:45,881 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 02:41:45,883 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 02:41:45,883 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 02:41:45,886 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 02:41:45,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 02:41:45" (1/3) ... [2023-04-01 02:41:45,887 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64681f1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 02:41:45, skipping insertion in model container [2023-04-01 02:41:45,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:41:45" (2/3) ... [2023-04-01 02:41:45,887 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64681f1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 02:41:45, skipping insertion in model container [2023-04-01 02:41:45,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 02:41:45" (3/3) ... [2023-04-01 02:41:45,888 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_strcpy_ground-1.i [2023-04-01 02:41:45,905 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 02:41:45,905 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 02:41:45,946 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 02:41:45,952 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;@46979e1e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 02:41:45,952 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 02:41:45,956 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 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 02:41:45,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-01 02:41:45,962 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:41:45,963 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:41:45,963 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:41:45,968 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:41:45,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1041809, now seen corresponding path program 1 times [2023-04-01 02:41:45,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:41:45,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884584172] [2023-04-01 02:41:45,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:41:45,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:41:46,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:41:46,193 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 02:41:46,194 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:41:46,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884584172] [2023-04-01 02:41:46,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884584172] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 02:41:46,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 02:41:46,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 02:41:46,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732008939] [2023-04-01 02:41:46,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 02:41:46,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 02:41:46,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:41:46,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 02:41:46,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 02:41:46,245 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 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 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 02:41:46,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:41:46,288 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2023-04-01 02:41:46,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 02:41:46,290 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 02:41:46,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:41:46,295 INFO L225 Difference]: With dead ends: 34 [2023-04-01 02:41:46,295 INFO L226 Difference]: Without dead ends: 18 [2023-04-01 02:41:46,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 02:41:46,304 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:41:46,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:41:46,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-04-01 02:41:46,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-04-01 02:41:46,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:41:46,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2023-04-01 02:41:46,338 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2023-04-01 02:41:46,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:41:46,339 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2023-04-01 02:41:46,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 02:41:46,339 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2023-04-01 02:41:46,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-01 02:41:46,340 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:41:46,340 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:41:46,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 02:41:46,341 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:41:46,341 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:41:46,342 INFO L85 PathProgramCache]: Analyzing trace with hash -942771522, now seen corresponding path program 1 times [2023-04-01 02:41:46,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:41:46,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892879197] [2023-04-01 02:41:46,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:41:46,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:41:46,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:41:46,421 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 02:41:46,422 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:41:46,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892879197] [2023-04-01 02:41:46,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892879197] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 02:41:46,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 02:41:46,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 02:41:46,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036181839] [2023-04-01 02:41:46,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 02:41:46,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 02:41:46,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:41:46,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 02:41:46,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 02:41:46,426 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 02:41:46,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:41:46,442 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2023-04-01 02:41:46,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 02:41:46,443 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 14 [2023-04-01 02:41:46,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:41:46,443 INFO L225 Difference]: With dead ends: 31 [2023-04-01 02:41:46,443 INFO L226 Difference]: Without dead ends: 19 [2023-04-01 02:41:46,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 02:41:46,445 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:41:46,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:41:46,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-04-01 02:41:46,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-04-01 02:41:46,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:41:46,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2023-04-01 02:41:46,451 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 14 [2023-04-01 02:41:46,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:41:46,451 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2023-04-01 02:41:46,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 02:41:46,451 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2023-04-01 02:41:46,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-01 02:41:46,452 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:41:46,452 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:41:46,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 02:41:46,452 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:41:46,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:41:46,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1748477900, now seen corresponding path program 1 times [2023-04-01 02:41:46,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:41:46,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593698333] [2023-04-01 02:41:46,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:41:46,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:41:46,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:41:46,551 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 02:41:46,551 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:41:46,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593698333] [2023-04-01 02:41:46,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593698333] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:41:46,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55693189] [2023-04-01 02:41:46,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:41:46,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:41:46,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:41:46,561 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 02:41:46,578 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 02:41:46,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:41:46,661 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 02:41:46,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:41:46,712 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 02:41:46,712 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:41:46,763 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 02:41:46,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55693189] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:41:46,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1389393174] [2023-04-01 02:41:46,786 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-01 02:41:46,786 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:41:46,789 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:41:46,794 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:41:46,794 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:41:46,921 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:41:47,127 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:41:47,134 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:41:47,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1389393174] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 02:41:47,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:41:47,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [4, 4, 4] total 16 [2023-04-01 02:41:47,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26888579] [2023-04-01 02:41:47,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 02:41:47,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 02:41:47,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:41:47,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 02:41:47,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-04-01 02:41:47,622 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 11 states, 8 states have (on average 1.375) internal successors, (11), 7 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 02:41:48,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:41:48,488 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2023-04-01 02:41:48,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 02:41:48,488 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 1.375) internal successors, (11), 7 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) Word has length 15 [2023-04-01 02:41:48,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:41:48,489 INFO L225 Difference]: With dead ends: 44 [2023-04-01 02:41:48,489 INFO L226 Difference]: Without dead ends: 33 [2023-04-01 02:41:48,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2023-04-01 02:41:48,492 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 66 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 02:41:48,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 8 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 02:41:48,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-04-01 02:41:48,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 21. [2023-04-01 02:41:48,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:41:48,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2023-04-01 02:41:48,500 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 15 [2023-04-01 02:41:48,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:41:48,500 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2023-04-01 02:41:48,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 1.375) internal successors, (11), 7 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 02:41:48,501 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2023-04-01 02:41:48,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-01 02:41:48,501 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:41:48,501 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:41:48,511 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 02:41:48,702 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 [2023-04-01 02:41:48,702 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:41:48,703 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:41:48,703 INFO L85 PathProgramCache]: Analyzing trace with hash -2069964037, now seen corresponding path program 1 times [2023-04-01 02:41:48,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:41:48,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508678044] [2023-04-01 02:41:48,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:41:48,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:41:48,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:41:48,786 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 02:41:48,786 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:41:48,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508678044] [2023-04-01 02:41:48,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508678044] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:41:48,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860595974] [2023-04-01 02:41:48,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:41:48,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:41:48,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:41:48,788 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 02:41:48,791 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 02:41:48,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:41:48,847 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 02:41:48,849 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:41:48,878 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 02:41:48,879 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:41:48,906 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 02:41:48,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860595974] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:41:48,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [781134821] [2023-04-01 02:41:48,909 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-01 02:41:48,909 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:41:48,909 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:41:48,909 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:41:48,909 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:41:48,938 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:41:49,236 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-01 02:41:49,260 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:41:49,265 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:41:49,797 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) (exists ((|v_main_~#src~0.base_BEFORE_CALL_1| Int) (|v_main_~#dst~0.base_BEFORE_CALL_1| Int)) (and (not (= (select (select |#memory_int| |v_main_~#dst~0.base_BEFORE_CALL_1|) 0) (select (select |#memory_int| |v_main_~#src~0.base_BEFORE_CALL_1|) 0))) (<= 2 |v_main_~#src~0.base_BEFORE_CALL_1|) (<= 2 |v_main_~#dst~0.base_BEFORE_CALL_1|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#dst~0.base_BEFORE_CALL_1|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#dst~0.base_BEFORE_CALL_1|) (<= 3 (+ |v_main_~#src~0.base_BEFORE_CALL_1| |#StackHeapBarrier|)) (<= 4 (+ |v_main_~#src~0.base_BEFORE_CALL_1| |v_main_~#dst~0.base_BEFORE_CALL_1|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#src~0.base_BEFORE_CALL_1|))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:41:49,798 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:41:49,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:41:49,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-01 02:41:49,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429209414] [2023-04-01 02:41:49,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:41:49,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 02:41:49,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:41:49,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 02:41:49,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-04-01 02:41:49,800 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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 02:41:49,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:41:49,822 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2023-04-01 02:41:49,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 02:41:49,823 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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 02:41:49,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:41:49,823 INFO L225 Difference]: With dead ends: 38 [2023-04-01 02:41:49,824 INFO L226 Difference]: Without dead ends: 24 [2023-04-01 02:41:49,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-04-01 02:41:49,825 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:41:49,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 57 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:41:49,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-04-01 02:41:49,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-04-01 02:41:49,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:41:49,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2023-04-01 02:41:49,833 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 17 [2023-04-01 02:41:49,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:41:49,834 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2023-04-01 02:41:49,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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 02:41:49,834 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2023-04-01 02:41:49,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-01 02:41:49,835 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:41:49,835 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:41:49,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 02:41:50,040 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 [2023-04-01 02:41:50,041 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:41:50,041 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:41:50,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1456233235, now seen corresponding path program 2 times [2023-04-01 02:41:50,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:41:50,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604399982] [2023-04-01 02:41:50,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:41:50,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:41:50,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:41:50,222 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 02:41:50,223 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:41:50,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604399982] [2023-04-01 02:41:50,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604399982] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:41:50,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096475271] [2023-04-01 02:41:50,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:41:50,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:41:50,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:41:50,225 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 02:41:50,228 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 02:41:50,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 02:41:50,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:41:50,288 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 26 conjunts are in the unsatisfiable core [2023-04-01 02:41:50,291 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:41:50,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-04-01 02:41:50,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2023-04-01 02:41:50,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2023-04-01 02:41:50,505 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 02:41:50,505 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:41:50,571 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 02:41:50,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 78 [2023-04-01 02:41:50,605 INFO L321 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2023-04-01 02:41:50,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 72 [2023-04-01 02:41:50,644 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-04-01 02:41:50,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 16 [2023-04-01 02:41:50,717 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 02:41:50,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096475271] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:41:50,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [442064077] [2023-04-01 02:41:50,722 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-01 02:41:50,722 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:41:50,722 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:41:50,722 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:41:50,723 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:41:50,750 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:41:50,951 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-01 02:41:50,968 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:41:50,972 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:41:51,692 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '741#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#dst~0.base_BEFORE_CALL_2| Int) (|v_main_~#src~0.base_BEFORE_CALL_2| Int)) (and (<= 3 (+ |#StackHeapBarrier| |v_main_~#dst~0.base_BEFORE_CALL_2|)) (<= 2 |v_main_~#dst~0.base_BEFORE_CALL_2|) (<= 4 (+ |v_main_~#src~0.base_BEFORE_CALL_2| |v_main_~#dst~0.base_BEFORE_CALL_2|)) (not (= (select (select |#memory_int| |v_main_~#src~0.base_BEFORE_CALL_2|) 0) (select (select |#memory_int| |v_main_~#dst~0.base_BEFORE_CALL_2|) 0))) (<= 2 |v_main_~#src~0.base_BEFORE_CALL_2|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#src~0.base_BEFORE_CALL_2|) (<= 3 (+ |v_main_~#src~0.base_BEFORE_CALL_2| |#StackHeapBarrier|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#dst~0.base_BEFORE_CALL_2|))) (= |#NULL.base| 0))' at error location [2023-04-01 02:41:51,692 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:41:51,692 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:41:51,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 18 [2023-04-01 02:41:51,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334904184] [2023-04-01 02:41:51,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:41:51,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-01 02:41:51,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:41:51,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-01 02:41:51,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2023-04-01 02:41:51,695 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:41:51,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:41:51,898 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2023-04-01 02:41:51,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 02:41:51,899 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-04-01 02:41:51,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:41:51,900 INFO L225 Difference]: With dead ends: 46 [2023-04-01 02:41:51,900 INFO L226 Difference]: Without dead ends: 32 [2023-04-01 02:41:51,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=146, Invalid=1114, Unknown=0, NotChecked=0, Total=1260 [2023-04-01 02:41:51,901 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 16 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:41:51,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 90 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:41:51,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-04-01 02:41:51,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2023-04-01 02:41:51,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 4 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) [2023-04-01 02:41:51,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2023-04-01 02:41:51,912 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 20 [2023-04-01 02:41:51,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:41:51,912 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2023-04-01 02:41:51,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:41:51,912 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2023-04-01 02:41:51,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-01 02:41:51,913 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:41:51,913 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:41:51,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-01 02:41:52,118 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 [2023-04-01 02:41:52,119 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:41:52,119 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:41:52,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1960782437, now seen corresponding path program 1 times [2023-04-01 02:41:52,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:41:52,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754673333] [2023-04-01 02:41:52,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:41:52,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:41:52,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:41:52,223 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 02:41:52,223 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:41:52,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754673333] [2023-04-01 02:41:52,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754673333] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:41:52,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969256670] [2023-04-01 02:41:52,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:41:52,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:41:52,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:41:52,225 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 02:41:52,230 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 02:41:52,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:41:52,295 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 02:41:52,299 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:41:52,317 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 02:41:52,318 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:41:52,388 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 02:41:52,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969256670] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:41:52,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [108610799] [2023-04-01 02:41:52,392 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 02:41:52,392 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:41:52,397 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:41:52,397 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:41:52,397 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:41:52,416 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:41:52,831 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 49 for LOIs [2023-04-01 02:41:52,865 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:41:52,869 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:41:53,597 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1064#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#src~0.base_BEFORE_CALL_7| Int) (|v_main_~#dst~0.base_BEFORE_CALL_7| Int) (v_main_~x~0_BEFORE_CALL_7 Int)) (and (<= (+ |#StackHeapBarrier| 1) |v_main_~#src~0.base_BEFORE_CALL_7|) (<= 1 (+ v_main_~x~0_BEFORE_CALL_7 |#StackHeapBarrier|)) (<= 3 (+ |v_main_~#src~0.base_BEFORE_CALL_7| |#StackHeapBarrier|)) (<= 2 (+ v_main_~x~0_BEFORE_CALL_7 |v_main_~#dst~0.base_BEFORE_CALL_7|)) (<= 4 (+ |v_main_~#src~0.base_BEFORE_CALL_7| |v_main_~#dst~0.base_BEFORE_CALL_7|)) (not (= (select (select |#memory_int| |v_main_~#dst~0.base_BEFORE_CALL_7|) (* v_main_~x~0_BEFORE_CALL_7 4)) (select (select |#memory_int| |v_main_~#src~0.base_BEFORE_CALL_7|) (* v_main_~x~0_BEFORE_CALL_7 4)))) (<= 0 v_main_~x~0_BEFORE_CALL_7) (<= (+ |#StackHeapBarrier| 1) |v_main_~#dst~0.base_BEFORE_CALL_7|) (<= 2 (+ v_main_~x~0_BEFORE_CALL_7 |v_main_~#src~0.base_BEFORE_CALL_7|)) (<= 3 (+ |#StackHeapBarrier| |v_main_~#dst~0.base_BEFORE_CALL_7|)) (<= 2 |v_main_~#dst~0.base_BEFORE_CALL_7|) (<= 2 |v_main_~#src~0.base_BEFORE_CALL_7|))) (= |#NULL.base| 0))' at error location [2023-04-01 02:41:53,597 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:41:53,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:41:53,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-04-01 02:41:53,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094036219] [2023-04-01 02:41:53,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:41:53,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 02:41:53,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:41:53,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 02:41:53,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=604, Unknown=0, NotChecked=0, Total=756 [2023-04-01 02:41:53,600 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 02:41:53,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:41:53,635 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2023-04-01 02:41:53,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 02:41:53,636 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2023-04-01 02:41:53,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:41:53,640 INFO L225 Difference]: With dead ends: 58 [2023-04-01 02:41:53,640 INFO L226 Difference]: Without dead ends: 38 [2023-04-01 02:41:53,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=152, Invalid=604, Unknown=0, NotChecked=0, Total=756 [2023-04-01 02:41:53,643 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 57 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 02:41:53,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 57 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:41:53,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-04-01 02:41:53,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-04-01 02:41:53,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 30 states have (on average 1.1) internal successors, (33), 31 states have internal predecessors, (33), 4 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) [2023-04-01 02:41:53,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2023-04-01 02:41:53,665 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 28 [2023-04-01 02:41:53,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:41:53,665 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2023-04-01 02:41:53,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 02:41:53,665 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2023-04-01 02:41:53,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-01 02:41:53,667 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:41:53,667 INFO L195 NwaCegarLoop]: trace histogram [12, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:41:53,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 02:41:53,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:41:53,873 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:41:53,873 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:41:53,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1558793805, now seen corresponding path program 2 times [2023-04-01 02:41:53,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:41:53,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131800021] [2023-04-01 02:41:53,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:41:53,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:41:53,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:41:54,114 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 2 proven. 78 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 02:41:54,114 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:41:54,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131800021] [2023-04-01 02:41:54,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131800021] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:41:54,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367197720] [2023-04-01 02:41:54,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:41:54,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:41:54,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:41:54,117 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 02:41:54,118 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 02:41:54,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 02:41:54,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:41:54,200 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 02:41:54,202 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:41:54,273 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-04-01 02:41:54,273 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:41:54,359 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-04-01 02:41:54,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367197720] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:41:54,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1877608636] [2023-04-01 02:41:54,361 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 02:41:54,361 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:41:54,362 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:41:54,362 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:41:54,362 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:41:54,378 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:41:54,715 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 49 for LOIs [2023-04-01 02:41:54,745 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:41:54,748 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:41:55,540 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1459#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#src~0.base_BEFORE_CALL_14| Int) (v_main_~x~0_BEFORE_CALL_16 Int) (|v_main_~#dst~0.base_BEFORE_CALL_14| Int)) (and (<= 3 (+ |v_main_~#src~0.base_BEFORE_CALL_14| |#StackHeapBarrier|)) (<= 3 (+ |v_main_~#dst~0.base_BEFORE_CALL_14| |#StackHeapBarrier|)) (<= 2 |v_main_~#dst~0.base_BEFORE_CALL_14|) (<= 2 (+ |v_main_~#dst~0.base_BEFORE_CALL_14| v_main_~x~0_BEFORE_CALL_16)) (not (= (select (select |#memory_int| |v_main_~#src~0.base_BEFORE_CALL_14|) (* v_main_~x~0_BEFORE_CALL_16 4)) (select (select |#memory_int| |v_main_~#dst~0.base_BEFORE_CALL_14|) (* v_main_~x~0_BEFORE_CALL_16 4)))) (<= (+ |#StackHeapBarrier| 1) |v_main_~#dst~0.base_BEFORE_CALL_14|) (<= 0 v_main_~x~0_BEFORE_CALL_16) (<= 2 (+ |v_main_~#src~0.base_BEFORE_CALL_14| v_main_~x~0_BEFORE_CALL_16)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#src~0.base_BEFORE_CALL_14|) (<= 4 (+ |v_main_~#src~0.base_BEFORE_CALL_14| |v_main_~#dst~0.base_BEFORE_CALL_14|)) (<= 1 (+ |#StackHeapBarrier| v_main_~x~0_BEFORE_CALL_16)) (<= 2 |v_main_~#src~0.base_BEFORE_CALL_14|))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:41:55,540 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:41:55,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:41:55,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 6, 6] total 21 [2023-04-01 02:41:55,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324400734] [2023-04-01 02:41:55,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:41:55,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-01 02:41:55,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:41:55,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-01 02:41:55,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=948, Unknown=0, NotChecked=0, Total=1122 [2023-04-01 02:41:55,542 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 02:41:55,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:41:55,791 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2023-04-01 02:41:55,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-01 02:41:55,792 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 35 [2023-04-01 02:41:55,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:41:55,793 INFO L225 Difference]: With dead ends: 66 [2023-04-01 02:41:55,793 INFO L226 Difference]: Without dead ends: 41 [2023-04-01 02:41:55,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 82 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=395, Invalid=1767, Unknown=0, NotChecked=0, Total=2162 [2023-04-01 02:41:55,795 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:41:55,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 141 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:41:55,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-04-01 02:41:55,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-04-01 02:41:55,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 34 states have internal predecessors, (36), 4 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) [2023-04-01 02:41:55,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2023-04-01 02:41:55,807 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 35 [2023-04-01 02:41:55,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:41:55,807 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2023-04-01 02:41:55,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 02:41:55,808 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2023-04-01 02:41:55,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-01 02:41:55,808 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:41:55,809 INFO L195 NwaCegarLoop]: trace histogram [13, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:41:55,816 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 02:41:56,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:41:56,014 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:41:56,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:41:56,015 INFO L85 PathProgramCache]: Analyzing trace with hash 157426454, now seen corresponding path program 3 times [2023-04-01 02:41:56,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:41:56,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68853388] [2023-04-01 02:41:56,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:41:56,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:41:56,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:41:56,343 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 2 proven. 91 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 02:41:56,344 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:41:56,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68853388] [2023-04-01 02:41:56,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68853388] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:41:56,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051522161] [2023-04-01 02:41:56,344 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 02:41:56,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:41:56,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:41:56,345 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 02:41:56,348 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 02:41:56,431 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 02:41:56,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:41:56,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 15 conjunts are in the unsatisfiable core [2023-04-01 02:41:56,434 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:41:56,462 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 02:41:56,462 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:41:56,712 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 2 proven. 91 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 02:41:56,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051522161] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:41:56,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [383989976] [2023-04-01 02:41:56,714 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 02:41:56,715 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:41:56,715 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:41:56,715 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:41:56,715 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:41:56,728 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:41:57,071 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 49 for LOIs [2023-04-01 02:41:57,109 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:41:57,113 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:41:57,847 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1926#(and (exists ((|v_main_~#dst~0.base_BEFORE_CALL_21| Int) (|v_main_~#src~0.base_BEFORE_CALL_21| Int) (v_main_~x~0_BEFORE_CALL_23 Int)) (and (not (= (select (select |#memory_int| |v_main_~#src~0.base_BEFORE_CALL_21|) (* v_main_~x~0_BEFORE_CALL_23 4)) (select (select |#memory_int| |v_main_~#dst~0.base_BEFORE_CALL_21|) (* v_main_~x~0_BEFORE_CALL_23 4)))) (<= (+ |#StackHeapBarrier| 1) |v_main_~#dst~0.base_BEFORE_CALL_21|) (<= 4 (+ |v_main_~#src~0.base_BEFORE_CALL_21| |v_main_~#dst~0.base_BEFORE_CALL_21|)) (<= 2 |v_main_~#src~0.base_BEFORE_CALL_21|) (<= 2 (+ |v_main_~#dst~0.base_BEFORE_CALL_21| v_main_~x~0_BEFORE_CALL_23)) (<= 2 (+ |v_main_~#src~0.base_BEFORE_CALL_21| v_main_~x~0_BEFORE_CALL_23)) (<= 3 (+ |v_main_~#src~0.base_BEFORE_CALL_21| |#StackHeapBarrier|)) (<= 0 v_main_~x~0_BEFORE_CALL_23) (<= 3 (+ |v_main_~#dst~0.base_BEFORE_CALL_21| |#StackHeapBarrier|)) (<= 2 |v_main_~#dst~0.base_BEFORE_CALL_21|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#src~0.base_BEFORE_CALL_21|) (<= 1 (+ |#StackHeapBarrier| v_main_~x~0_BEFORE_CALL_23)))) (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:41:57,847 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:41:57,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:41:57,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2023-04-01 02:41:57,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113306068] [2023-04-01 02:41:57,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:41:57,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-04-01 02:41:57,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:41:57,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-04-01 02:41:57,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=512, Invalid=1380, Unknown=0, NotChecked=0, Total=1892 [2023-04-01 02:41:57,850 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 31 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 02:41:57,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:41:57,908 INFO L93 Difference]: Finished difference Result 78 states and 96 transitions. [2023-04-01 02:41:57,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-04-01 02:41:57,909 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 31 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2023-04-01 02:41:57,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:41:57,909 INFO L225 Difference]: With dead ends: 78 [2023-04-01 02:41:57,909 INFO L226 Difference]: Without dead ends: 56 [2023-04-01 02:41:57,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 83 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=512, Invalid=1380, Unknown=0, NotChecked=0, Total=1892 [2023-04-01 02:41:57,911 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:41:57,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 85 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:41:57,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-04-01 02:41:57,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2023-04-01 02:41:57,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 48 states have (on average 1.0625) internal successors, (51), 49 states have internal predecessors, (51), 4 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) [2023-04-01 02:41:57,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2023-04-01 02:41:57,926 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 38 [2023-04-01 02:41:57,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:41:57,926 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2023-04-01 02:41:57,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 31 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 02:41:57,927 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2023-04-01 02:41:57,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-01 02:41:57,927 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:41:57,927 INFO L195 NwaCegarLoop]: trace histogram [28, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:41:57,934 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 02:41:58,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:41:58,134 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:41:58,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:41:58,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1259117028, now seen corresponding path program 4 times [2023-04-01 02:41:58,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:41:58,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204277433] [2023-04-01 02:41:58,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:41:58,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:41:58,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:41:58,858 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 2 proven. 406 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 02:41:58,858 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:41:58,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204277433] [2023-04-01 02:41:58,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204277433] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:41:58,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820472604] [2023-04-01 02:41:58,858 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 02:41:58,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:41:58,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:41:58,861 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 02:41:58,862 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 02:41:58,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:41:58,971 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 30 conjunts are in the unsatisfiable core [2023-04-01 02:41:58,973 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:41:59,020 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 02:41:59,021 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:41:59,966 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 2 proven. 406 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 02:41:59,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820472604] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:41:59,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [469812803] [2023-04-01 02:41:59,968 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 02:41:59,968 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:41:59,969 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:41:59,969 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:41:59,969 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:41:59,986 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:42:00,322 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 49 for LOIs [2023-04-01 02:42:00,349 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:42:00,352 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:42:01,245 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2542#(and (<= 1 |#StackHeapBarrier|) (exists ((v_main_~x~0_BEFORE_CALL_30 Int) (|v_main_~#src~0.base_BEFORE_CALL_28| Int) (|v_main_~#dst~0.base_BEFORE_CALL_28| Int)) (and (<= 2 (+ |v_main_~#src~0.base_BEFORE_CALL_28| v_main_~x~0_BEFORE_CALL_30)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#src~0.base_BEFORE_CALL_28|) (<= 2 (+ |v_main_~#dst~0.base_BEFORE_CALL_28| v_main_~x~0_BEFORE_CALL_30)) (<= 2 |v_main_~#src~0.base_BEFORE_CALL_28|) (<= 2 |v_main_~#dst~0.base_BEFORE_CALL_28|) (<= 0 v_main_~x~0_BEFORE_CALL_30) (<= 3 (+ |v_main_~#dst~0.base_BEFORE_CALL_28| |#StackHeapBarrier|)) (<= 4 (+ |v_main_~#src~0.base_BEFORE_CALL_28| |v_main_~#dst~0.base_BEFORE_CALL_28|)) (<= 3 (+ |v_main_~#src~0.base_BEFORE_CALL_28| |#StackHeapBarrier|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#dst~0.base_BEFORE_CALL_28|) (not (= (select (select |#memory_int| |v_main_~#dst~0.base_BEFORE_CALL_28|) (* v_main_~x~0_BEFORE_CALL_30 4)) (select (select |#memory_int| |v_main_~#src~0.base_BEFORE_CALL_28|) (* v_main_~x~0_BEFORE_CALL_30 4)))) (<= 1 (+ |#StackHeapBarrier| v_main_~x~0_BEFORE_CALL_30)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:42:01,246 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:42:01,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:42:01,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 61 [2023-04-01 02:42:01,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15574968] [2023-04-01 02:42:01,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:42:01,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-04-01 02:42:01,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:42:01,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-04-01 02:42:01,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1877, Invalid=3525, Unknown=0, NotChecked=0, Total=5402 [2023-04-01 02:42:01,250 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand has 61 states, 61 states have (on average 1.2622950819672132) internal successors, (77), 61 states have internal predecessors, (77), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 02:42:01,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:42:01,341 INFO L93 Difference]: Finished difference Result 108 states and 141 transitions. [2023-04-01 02:42:01,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-04-01 02:42:01,342 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.2622950819672132) internal successors, (77), 61 states have internal predecessors, (77), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 53 [2023-04-01 02:42:01,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:42:01,343 INFO L225 Difference]: With dead ends: 108 [2023-04-01 02:42:01,343 INFO L226 Difference]: Without dead ends: 86 [2023-04-01 02:42:01,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 113 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1616 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1877, Invalid=3525, Unknown=0, NotChecked=0, Total=5402 [2023-04-01 02:42:01,345 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:42:01,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 71 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:42:01,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-04-01 02:42:01,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2023-04-01 02:42:01,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 78 states have (on average 1.0384615384615385) internal successors, (81), 79 states have internal predecessors, (81), 4 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) [2023-04-01 02:42:01,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2023-04-01 02:42:01,382 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 53 [2023-04-01 02:42:01,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:42:01,382 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2023-04-01 02:42:01,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.2622950819672132) internal successors, (77), 61 states have internal predecessors, (77), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 02:42:01,382 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2023-04-01 02:42:01,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-04-01 02:42:01,389 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:42:01,389 INFO L195 NwaCegarLoop]: trace histogram [58, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:42:01,398 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 02:42:01,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:42:01,596 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:42:01,596 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:42:01,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1684994140, now seen corresponding path program 5 times [2023-04-01 02:42:01,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:42:01,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27738853] [2023-04-01 02:42:01,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:42:01,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:42:01,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:42:03,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1721 backedges. 2 proven. 1711 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 02:42:03,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:42:03,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27738853] [2023-04-01 02:42:03,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27738853] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:42:03,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810549412] [2023-04-01 02:42:03,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:42:03,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:42:03,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:42:03,853 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 02:42:03,859 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 02:42:03,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 02:42:03,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:42:03,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 33 conjunts are in the unsatisfiable core [2023-04-01 02:42:03,998 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:42:04,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-04-01 02:42:04,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2023-04-01 02:42:06,453 WARN L861 $PredicateComparison]: unable to prove that (exists ((|v_main_~#dst~0.base_BEFORE_CALL_31| Int) (|v_main_~#dst~0.offset_BEFORE_CALL_31| Int) (|v_main_~#src~0.base_BEFORE_CALL_31| Int)) (and (= (select (select |c_#memory_int| |v_main_~#src~0.base_BEFORE_CALL_31|) 4) (select (select |c_#memory_int| |v_main_~#dst~0.base_BEFORE_CALL_31|) (+ |v_main_~#dst~0.offset_BEFORE_CALL_31| 4))) (not (= |v_main_~#src~0.base_BEFORE_CALL_31| |v_main_~#dst~0.base_BEFORE_CALL_31|)))) is different from true [2023-04-01 02:42:10,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 10 [2023-04-01 02:42:12,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1721 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1711 trivial. 1 not checked. [2023-04-01 02:42:12,752 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:42:14,970 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 02:42:14,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 88 [2023-04-01 02:42:15,017 INFO L321 Elim1Store]: treesize reduction 10, result has 67.7 percent of original size [2023-04-01 02:42:15,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 36 [2023-04-01 02:42:15,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1721 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2023-04-01 02:42:15,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810549412] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:42:15,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [263713015] [2023-04-01 02:42:15,180 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 02:42:15,180 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:42:15,180 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:42:15,181 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:42:15,181 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:42:15,196 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:42:15,510 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 49 for LOIs [2023-04-01 02:42:15,543 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:42:15,546 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:42:25,165 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3476#(and (exists ((|v_main_~#src~0.base_BEFORE_CALL_37| Int) (v_main_~x~0_BEFORE_CALL_39 Int) (|v_main_~#dst~0.base_BEFORE_CALL_37| Int)) (and (<= (+ |#StackHeapBarrier| 1) |v_main_~#dst~0.base_BEFORE_CALL_37|) (<= 3 (+ |v_main_~#dst~0.base_BEFORE_CALL_37| |#StackHeapBarrier|)) (not (= (select (select |#memory_int| |v_main_~#src~0.base_BEFORE_CALL_37|) (* v_main_~x~0_BEFORE_CALL_39 4)) (select (select |#memory_int| |v_main_~#dst~0.base_BEFORE_CALL_37|) (* v_main_~x~0_BEFORE_CALL_39 4)))) (<= (+ |#StackHeapBarrier| 1) |v_main_~#src~0.base_BEFORE_CALL_37|) (<= 4 (+ |v_main_~#src~0.base_BEFORE_CALL_37| |v_main_~#dst~0.base_BEFORE_CALL_37|)) (<= 1 (+ |#StackHeapBarrier| v_main_~x~0_BEFORE_CALL_39)) (<= 2 |v_main_~#dst~0.base_BEFORE_CALL_37|) (<= 0 v_main_~x~0_BEFORE_CALL_39) (<= 2 (+ |v_main_~#dst~0.base_BEFORE_CALL_37| v_main_~x~0_BEFORE_CALL_39)) (<= 2 (+ |v_main_~#src~0.base_BEFORE_CALL_37| v_main_~x~0_BEFORE_CALL_39)) (<= 3 (+ |v_main_~#src~0.base_BEFORE_CALL_37| |#StackHeapBarrier|)) (<= 2 |v_main_~#src~0.base_BEFORE_CALL_37|))) (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:42:25,165 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:42:25,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:42:25,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 13, 10] total 79 [2023-04-01 02:42:25,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985397259] [2023-04-01 02:42:25,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:42:25,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2023-04-01 02:42:25,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:42:25,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2023-04-01 02:42:25,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1931, Invalid=6256, Unknown=7, NotChecked=178, Total=8372 [2023-04-01 02:42:25,169 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand has 79 states, 78 states have (on average 1.358974358974359) internal successors, (106), 76 states have internal predecessors, (106), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4)