/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_minInArray_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 14:10:41,285 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 14:10:41,287 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 14:10:41,324 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 14:10:41,325 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 14:10:41,327 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 14:10:41,330 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 14:10:41,332 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 14:10:41,334 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 14:10:41,338 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 14:10:41,339 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 14:10:41,341 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 14:10:41,342 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 14:10:41,344 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 14:10:41,345 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 14:10:41,349 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 14:10:41,350 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 14:10:41,350 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 14:10:41,352 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 14:10:41,357 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 14:10:41,358 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 14:10:41,362 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 14:10:41,363 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 14:10:41,364 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 14:10:41,372 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 14:10:41,375 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 14:10:41,375 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 14:10:41,377 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 14:10:41,377 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 14:10:41,378 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 14:10:41,378 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 14:10:41,378 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 14:10:41,378 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 14:10:41,379 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 14:10:41,379 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 14:10:41,380 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 14:10:41,381 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-02 14:10:41,407 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 14:10:41,407 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 14:10:41,408 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 14:10:41,408 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 14:10:41,409 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 14:10:41,409 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 14:10:41,409 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 14:10:41,409 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 14:10:41,409 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 14:10:41,409 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 14:10:41,410 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 14:10:41,410 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 14:10:41,410 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 14:10:41,411 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 14:10:41,411 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 14:10:41,411 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 14:10:41,411 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 14:10:41,411 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 14:10:41,412 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 14:10:41,412 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 14:10:41,412 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 14:10:41,412 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 14:10:41,412 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 14:10:41,412 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 14:10:41,412 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 14:10:41,412 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 14:10:41,413 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 14:10:41,413 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 14:10:41,413 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 14:10:41,413 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 14:10:41,413 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 14:10:41,413 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 14:10:41,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 14:10:41,414 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 14:10:41,414 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 14:10:41,414 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 14:10:41,414 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 14:10:41,414 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 14:10:41,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 14:10:41,414 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 14:10:41,415 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 14:10:41,415 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 14:10:41,608 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 14:10:41,631 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 14:10:41,633 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 14:10:41,635 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 14:10:41,635 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 14:10:41,636 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_minInArray_ground-1.i [2023-04-02 14:10:42,857 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 14:10:43,026 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 14:10:43,026 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_minInArray_ground-1.i [2023-04-02 14:10:43,031 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/445cb086b/a9bfc87207b8455d8ff0e9204e1c133f/FLAGdc3e67d15 [2023-04-02 14:10:43,045 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/445cb086b/a9bfc87207b8455d8ff0e9204e1c133f [2023-04-02 14:10:43,047 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 14:10:43,048 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 14:10:43,049 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 14:10:43,049 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 14:10:43,055 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 14:10:43,057 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:10:43" (1/1) ... [2023-04-02 14:10:43,058 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bf74073 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:10:43, skipping insertion in model container [2023-04-02 14:10:43,058 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:10:43" (1/1) ... [2023-04-02 14:10:43,064 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 14:10:43,082 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 14:10:43,194 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_minInArray_ground-1.i[821,834] [2023-04-02 14:10:43,206 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 14:10:43,217 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 14:10:43,229 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_minInArray_ground-1.i[821,834] [2023-04-02 14:10:43,240 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 14:10:43,251 INFO L208 MainTranslator]: Completed translation [2023-04-02 14:10:43,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:10:43 WrapperNode [2023-04-02 14:10:43,252 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 14:10:43,253 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 14:10:43,253 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 14:10:43,253 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 14:10:43,263 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:10:43" (1/1) ... [2023-04-02 14:10:43,263 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:10:43" (1/1) ... [2023-04-02 14:10:43,269 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:10:43" (1/1) ... [2023-04-02 14:10:43,270 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:10:43" (1/1) ... [2023-04-02 14:10:43,286 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:10:43" (1/1) ... [2023-04-02 14:10:43,292 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:10:43" (1/1) ... [2023-04-02 14:10:43,298 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:10:43" (1/1) ... [2023-04-02 14:10:43,299 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:10:43" (1/1) ... [2023-04-02 14:10:43,303 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 14:10:43,304 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 14:10:43,304 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 14:10:43,304 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 14:10:43,306 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:10:43" (1/1) ... [2023-04-02 14:10:43,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 14:10:43,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:10:43,342 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 14:10:43,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 14:10:43,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 14:10:43,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 14:10:43,378 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 14:10:43,378 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 14:10:43,379 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 14:10:43,379 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 14:10:43,379 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 14:10:43,379 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-02 14:10:43,379 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-02 14:10:43,379 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 14:10:43,379 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 14:10:43,380 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 14:10:43,380 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 14:10:43,380 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 14:10:43,380 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-02 14:10:43,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 14:10:43,380 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 14:10:43,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 14:10:43,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 14:10:43,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 14:10:43,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 14:10:43,456 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 14:10:43,458 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 14:10:43,589 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 14:10:43,633 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 14:10:43,633 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-02 14:10:43,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:10:43 BoogieIcfgContainer [2023-04-02 14:10:43,636 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 14:10:43,638 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 14:10:43,638 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 14:10:43,641 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 14:10:43,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 02:10:43" (1/3) ... [2023-04-02 14:10:43,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5244c3c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:10:43, skipping insertion in model container [2023-04-02 14:10:43,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:10:43" (2/3) ... [2023-04-02 14:10:43,643 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5244c3c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:10:43, skipping insertion in model container [2023-04-02 14:10:43,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:10:43" (3/3) ... [2023-04-02 14:10:43,644 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_minInArray_ground-1.i [2023-04-02 14:10:43,659 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 14:10:43,660 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 14:10:43,735 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 14:10:43,741 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;@2cf1678, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 14:10:43,741 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 14:10:43,745 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 14:10:43,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-02 14:10:43,750 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:10:43,750 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:10:43,751 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:10:43,755 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:10:43,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1671142732, now seen corresponding path program 1 times [2023-04-02 14:10:43,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:10:43,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645861982] [2023-04-02 14:10:43,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:10:43,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:10:43,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:10:43,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:10:43,945 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:10:43,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645861982] [2023-04-02 14:10:43,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645861982] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 14:10:43,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 14:10:43,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 14:10:43,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582640025] [2023-04-02 14:10:43,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 14:10:43,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 14:10:43,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:10:43,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 14:10:43,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 14:10:43,979 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:10:44,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:10:44,022 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2023-04-02 14:10:44,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 14:10:44,025 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-04-02 14:10:44,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:10:44,030 INFO L225 Difference]: With dead ends: 33 [2023-04-02 14:10:44,030 INFO L226 Difference]: Without dead ends: 17 [2023-04-02 14:10:44,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 14:10:44,036 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:10:44,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:10:44,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-04-02 14:10:44,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-04-02 14:10:44,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 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) [2023-04-02 14:10:44,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2023-04-02 14:10:44,068 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2023-04-02 14:10:44,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:10:44,068 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2023-04-02 14:10:44,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:10:44,069 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2023-04-02 14:10:44,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-02 14:10:44,069 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:10:44,069 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:10:44,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 14:10:44,070 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:10:44,071 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:10:44,071 INFO L85 PathProgramCache]: Analyzing trace with hash -457034411, now seen corresponding path program 1 times [2023-04-02 14:10:44,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:10:44,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148715706] [2023-04-02 14:10:44,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:10:44,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:10:44,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:10:44,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 14:10:44,163 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:10:44,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148715706] [2023-04-02 14:10:44,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148715706] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 14:10:44,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 14:10:44,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 14:10:44,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609343756] [2023-04-02 14:10:44,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 14:10:44,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 14:10:44,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:10:44,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 14:10:44,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 14:10:44,167 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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) [2023-04-02 14:10:44,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:10:44,210 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2023-04-02 14:10:44,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 14:10:44,210 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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 [2023-04-02 14:10:44,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:10:44,211 INFO L225 Difference]: With dead ends: 27 [2023-04-02 14:10:44,211 INFO L226 Difference]: Without dead ends: 18 [2023-04-02 14:10:44,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 14:10:44,213 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:10:44,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:10:44,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-04-02 14:10:44,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-04-02 14:10:44,217 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) [2023-04-02 14:10:44,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2023-04-02 14:10:44,218 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2023-04-02 14:10:44,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:10:44,218 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2023-04-02 14:10:44,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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) [2023-04-02 14:10:44,219 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2023-04-02 14:10:44,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-02 14:10:44,219 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:10:44,219 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:10:44,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 14:10:44,220 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:10:44,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:10:44,221 INFO L85 PathProgramCache]: Analyzing trace with hash 697783642, now seen corresponding path program 1 times [2023-04-02 14:10:44,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:10:44,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100966031] [2023-04-02 14:10:44,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:10:44,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:10:44,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:10:44,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 14:10:44,300 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:10:44,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100966031] [2023-04-02 14:10:44,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100966031] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:10:44,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246788449] [2023-04-02 14:10:44,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:10:44,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:10:44,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:10:44,309 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:10:44,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 14:10:44,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:10:44,384 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 14:10:44,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:10:44,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 14:10:44,424 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:10:44,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 14:10:44,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246788449] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:10:44,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1650626104] [2023-04-02 14:10:44,467 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-02 14:10:44,467 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:10:44,470 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:10:44,474 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:10:44,475 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:10:44,585 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:10:44,894 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 53 for LOIs [2023-04-02 14:10:45,007 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:10:45,015 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:10:45,520 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '260#(and (exists ((v_main_~j~0_BEFORE_CALL_1 Int) (|v_main_~#a~0.offset_BEFORE_CALL_1| Int) (v_main_~i~0_BEFORE_CALL_1 Int) (|v_main_~#a~0.base_BEFORE_CALL_1| Int) (v_main_~min~0_BEFORE_CALL_1 Int)) (and (or (and (<= 2 |v_main_~#a~0.base_BEFORE_CALL_1|) (<= 1 |#StackHeapBarrier|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_1|) (<= 100002 (+ v_main_~j~0_BEFORE_CALL_1 |v_main_~#a~0.base_BEFORE_CALL_1|)) (<= 1 (+ v_main_~i~0_BEFORE_CALL_1 |#StackHeapBarrier|)) (<= 2 (+ v_main_~i~0_BEFORE_CALL_1 |v_main_~#a~0.base_BEFORE_CALL_1|)) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_1|)) (<= 100001 (+ |#StackHeapBarrier| v_main_~j~0_BEFORE_CALL_1)) (= |v_main_~#a~0.offset_BEFORE_CALL_1| 0) (<= 100000 (+ v_main_~i~0_BEFORE_CALL_1 v_main_~j~0_BEFORE_CALL_1)) (= |#NULL.offset| 0) (<= 100000 v_main_~j~0_BEFORE_CALL_1) (= |#NULL.base| 0)) (and (<= 2 |v_main_~#a~0.base_BEFORE_CALL_1|) (<= 1 |#StackHeapBarrier|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_1|) (<= 100002 (+ v_main_~j~0_BEFORE_CALL_1 |v_main_~#a~0.base_BEFORE_CALL_1|)) (<= 1 (+ v_main_~i~0_BEFORE_CALL_1 |#StackHeapBarrier|)) (<= 2 (+ v_main_~i~0_BEFORE_CALL_1 |v_main_~#a~0.base_BEFORE_CALL_1|)) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_1|)) (<= 100001 (+ |#StackHeapBarrier| v_main_~j~0_BEFORE_CALL_1)) (= v_main_~min~0_BEFORE_CALL_1 0) (= |v_main_~#a~0.offset_BEFORE_CALL_1| 0) (<= 100000 (+ v_main_~i~0_BEFORE_CALL_1 v_main_~j~0_BEFORE_CALL_1)) (= |#NULL.offset| 0) (<= 100000 v_main_~j~0_BEFORE_CALL_1) (= |#NULL.base| 0))) (<= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_1|) |v_main_~#a~0.offset_BEFORE_CALL_1|) v_main_~min~0_BEFORE_CALL_1) (<= 100000 v_main_~i~0_BEFORE_CALL_1))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 14:10:45,520 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:10:45,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:10:45,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-02 14:10:45,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246167427] [2023-04-02 14:10:45,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:10:45,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 14:10:45,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:10:45,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 14:10:45,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-04-02 14:10:45,523 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:10:45,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:10:45,555 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2023-04-02 14:10:45,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 14:10:45,555 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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 [2023-04-02 14:10:45,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:10:45,556 INFO L225 Difference]: With dead ends: 32 [2023-04-02 14:10:45,556 INFO L226 Difference]: Without dead ends: 21 [2023-04-02 14:10:45,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-04-02 14:10:45,561 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:10:45,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:10:45,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-04-02 14:10:45,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-04-02 14:10:45,576 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) [2023-04-02 14:10:45,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2023-04-02 14:10:45,577 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 14 [2023-04-02 14:10:45,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:10:45,578 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2023-04-02 14:10:45,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:10:45,578 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2023-04-02 14:10:45,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-02 14:10:45,580 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:10:45,580 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:10:45,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 14:10:45,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:10:45,786 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:10:45,787 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:10:45,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1112013315, now seen corresponding path program 2 times [2023-04-02 14:10:45,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:10:45,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525921679] [2023-04-02 14:10:45,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:10:45,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:10:45,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:10:45,854 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 14:10:45,855 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:10:45,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525921679] [2023-04-02 14:10:45,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525921679] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:10:45,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812451521] [2023-04-02 14:10:45,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:10:45,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:10:45,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:10:45,857 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:10:45,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 14:10:45,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-02 14:10:45,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:10:45,930 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 14:10:45,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:10:45,947 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 14:10:45,947 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:10:45,968 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 14:10:45,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812451521] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:10:45,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1258409474] [2023-04-02 14:10:45,971 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-02 14:10:45,971 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:10:45,972 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:10:45,973 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:10:45,973 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:10:46,007 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:10:46,206 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 53 for LOIs [2023-04-02 14:10:46,272 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:10:46,277 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:10:46,699 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '463#(and (exists ((|v_main_~#a~0.base_BEFORE_CALL_2| Int) (|v_main_~#a~0.offset_BEFORE_CALL_2| Int) (v_main_~j~0_BEFORE_CALL_2 Int) (v_main_~min~0_BEFORE_CALL_2 Int) (v_main_~i~0_BEFORE_CALL_2 Int)) (and (<= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_2|) |v_main_~#a~0.offset_BEFORE_CALL_2|) v_main_~min~0_BEFORE_CALL_2) (or (and (= |v_main_~#a~0.offset_BEFORE_CALL_2| 0) (<= 1 |#StackHeapBarrier|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_2|) (= v_main_~min~0_BEFORE_CALL_2 0) (<= 100002 (+ v_main_~j~0_BEFORE_CALL_2 |v_main_~#a~0.base_BEFORE_CALL_2|)) (<= 2 (+ v_main_~i~0_BEFORE_CALL_2 |v_main_~#a~0.base_BEFORE_CALL_2|)) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_2|)) (<= 100001 (+ |#StackHeapBarrier| v_main_~j~0_BEFORE_CALL_2)) (<= 1 (+ v_main_~i~0_BEFORE_CALL_2 |#StackHeapBarrier|)) (<= 2 |v_main_~#a~0.base_BEFORE_CALL_2|) (<= 100000 (+ v_main_~i~0_BEFORE_CALL_2 v_main_~j~0_BEFORE_CALL_2)) (= |#NULL.offset| 0) (<= 100000 v_main_~j~0_BEFORE_CALL_2) (= |#NULL.base| 0)) (and (= |v_main_~#a~0.offset_BEFORE_CALL_2| 0) (<= 1 |#StackHeapBarrier|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_2|) (<= 100002 (+ v_main_~j~0_BEFORE_CALL_2 |v_main_~#a~0.base_BEFORE_CALL_2|)) (<= 2 (+ v_main_~i~0_BEFORE_CALL_2 |v_main_~#a~0.base_BEFORE_CALL_2|)) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_2|)) (<= 100001 (+ |#StackHeapBarrier| v_main_~j~0_BEFORE_CALL_2)) (<= 1 (+ v_main_~i~0_BEFORE_CALL_2 |#StackHeapBarrier|)) (<= 2 |v_main_~#a~0.base_BEFORE_CALL_2|) (<= 100000 (+ v_main_~i~0_BEFORE_CALL_2 v_main_~j~0_BEFORE_CALL_2)) (= |#NULL.offset| 0) (<= 100000 v_main_~j~0_BEFORE_CALL_2) (= |#NULL.base| 0))) (<= 100000 v_main_~i~0_BEFORE_CALL_2))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 14:10:46,699 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:10:46,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:10:46,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-02 14:10:46,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575314857] [2023-04-02 14:10:46,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:10:46,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 14:10:46,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:10:46,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 14:10:46,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-04-02 14:10:46,701 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:10:46,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:10:46,717 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2023-04-02 14:10:46,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 14:10:46,717 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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 [2023-04-02 14:10:46,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:10:46,718 INFO L225 Difference]: With dead ends: 33 [2023-04-02 14:10:46,718 INFO L226 Difference]: Without dead ends: 24 [2023-04-02 14:10:46,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-04-02 14:10:46,721 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:10:46,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:10:46,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-04-02 14:10:46,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-04-02 14:10:46,724 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) [2023-04-02 14:10:46,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2023-04-02 14:10:46,725 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 17 [2023-04-02 14:10:46,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:10:46,725 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2023-04-02 14:10:46,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:10:46,726 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2023-04-02 14:10:46,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-02 14:10:46,726 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:10:46,726 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:10:46,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 14:10:46,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-04-02 14:10:46,937 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:10:46,938 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:10:46,938 INFO L85 PathProgramCache]: Analyzing trace with hash 892747084, now seen corresponding path program 3 times [2023-04-02 14:10:46,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:10:46,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124206513] [2023-04-02 14:10:46,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:10:46,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:10:46,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:10:47,076 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 14:10:47,077 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:10:47,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124206513] [2023-04-02 14:10:47,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124206513] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:10:47,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2681028] [2023-04-02 14:10:47,077 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 14:10:47,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:10:47,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:10:47,079 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:10:47,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 14:10:47,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 14:10:47,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:10:47,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 14:10:47,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:10:47,159 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 14:10:47,159 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:10:47,235 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 14:10:47,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2681028] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:10:47,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1996036115] [2023-04-02 14:10:47,239 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-02 14:10:47,239 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:10:47,239 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:10:47,240 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:10:47,240 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:10:47,269 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:10:47,393 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 53 for LOIs [2023-04-02 14:10:47,436 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:10:47,439 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:10:47,863 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '698#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#a~0.base_BEFORE_CALL_3| Int) (|v_main_~#a~0.offset_BEFORE_CALL_3| Int) (v_main_~j~0_BEFORE_CALL_3 Int) (v_main_~min~0_BEFORE_CALL_3 Int) (v_main_~i~0_BEFORE_CALL_3 Int)) (and (<= 100000 v_main_~i~0_BEFORE_CALL_3) (or (and (<= 1 |#StackHeapBarrier|) (<= 100000 v_main_~j~0_BEFORE_CALL_3) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_3|) (<= 100000 (+ v_main_~i~0_BEFORE_CALL_3 v_main_~j~0_BEFORE_CALL_3)) (<= 2 |v_main_~#a~0.base_BEFORE_CALL_3|) (<= 100001 (+ |#StackHeapBarrier| v_main_~j~0_BEFORE_CALL_3)) (<= 2 (+ v_main_~i~0_BEFORE_CALL_3 |v_main_~#a~0.base_BEFORE_CALL_3|)) (<= 1 (+ v_main_~i~0_BEFORE_CALL_3 |#StackHeapBarrier|)) (<= 100002 (+ v_main_~j~0_BEFORE_CALL_3 |v_main_~#a~0.base_BEFORE_CALL_3|)) (= |v_main_~#a~0.offset_BEFORE_CALL_3| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_3|))) (and (<= 1 |#StackHeapBarrier|) (<= 100000 v_main_~j~0_BEFORE_CALL_3) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_3|) (<= 100000 (+ v_main_~i~0_BEFORE_CALL_3 v_main_~j~0_BEFORE_CALL_3)) (<= 2 |v_main_~#a~0.base_BEFORE_CALL_3|) (<= 100001 (+ |#StackHeapBarrier| v_main_~j~0_BEFORE_CALL_3)) (<= 2 (+ v_main_~i~0_BEFORE_CALL_3 |v_main_~#a~0.base_BEFORE_CALL_3|)) (<= 1 (+ v_main_~i~0_BEFORE_CALL_3 |#StackHeapBarrier|)) (<= 100002 (+ v_main_~j~0_BEFORE_CALL_3 |v_main_~#a~0.base_BEFORE_CALL_3|)) (= |v_main_~#a~0.offset_BEFORE_CALL_3| 0) (= |#NULL.offset| 0) (= v_main_~min~0_BEFORE_CALL_3 0) (= |#NULL.base| 0) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_3|)))) (<= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_3|) |v_main_~#a~0.offset_BEFORE_CALL_3|) v_main_~min~0_BEFORE_CALL_3))))' at error location [2023-04-02 14:10:47,864 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:10:47,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:10:47,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-04-02 14:10:47,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562002488] [2023-04-02 14:10:47,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:10:47,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-02 14:10:47,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:10:47,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-02 14:10:47,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2023-04-02 14:10:47,866 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:10:47,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:10:47,891 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2023-04-02 14:10:47,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 14:10:47,892 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 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 20 [2023-04-02 14:10:47,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:10:47,892 INFO L225 Difference]: With dead ends: 44 [2023-04-02 14:10:47,892 INFO L226 Difference]: Without dead ends: 30 [2023-04-02 14:10:47,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2023-04-02 14:10:47,894 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:10:47,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:10:47,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-04-02 14:10:47,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-04-02 14:10:47,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 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) [2023-04-02 14:10:47,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2023-04-02 14:10:47,898 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 20 [2023-04-02 14:10:47,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:10:47,899 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2023-04-02 14:10:47,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:10:47,899 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2023-04-02 14:10:47,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-02 14:10:47,900 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:10:47,900 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:10:47,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 14:10:48,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:10:48,106 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:10:48,106 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:10:48,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1914472620, now seen corresponding path program 4 times [2023-04-02 14:10:48,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:10:48,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006779376] [2023-04-02 14:10:48,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:10:48,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:10:48,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:10:48,357 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 14:10:48,357 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:10:48,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006779376] [2023-04-02 14:10:48,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006779376] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:10:48,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063171830] [2023-04-02 14:10:48,358 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 14:10:48,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:10:48,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:10:48,359 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:10:48,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 14:10:48,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:10:48,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-02 14:10:48,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:10:48,468 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 14:10:48,468 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:10:48,635 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 14:10:48,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063171830] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:10:48,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1445518951] [2023-04-02 14:10:48,638 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-02 14:10:48,638 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:10:48,639 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:10:48,639 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:10:48,639 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:10:48,663 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:10:48,767 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 53 for LOIs [2023-04-02 14:10:48,807 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:10:48,817 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:10:49,293 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1015#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#a~0.base_BEFORE_CALL_4| Int) (|v_main_~#a~0.offset_BEFORE_CALL_4| Int) (v_main_~j~0_BEFORE_CALL_4 Int) (v_main_~min~0_BEFORE_CALL_4 Int) (v_main_~i~0_BEFORE_CALL_4 Int)) (and (<= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_4|) |v_main_~#a~0.offset_BEFORE_CALL_4|) v_main_~min~0_BEFORE_CALL_4) (or (and (<= 1 |#StackHeapBarrier|) (= v_main_~min~0_BEFORE_CALL_4 0) (= |v_main_~#a~0.offset_BEFORE_CALL_4| 0) (<= 100002 (+ v_main_~j~0_BEFORE_CALL_4 |v_main_~#a~0.base_BEFORE_CALL_4|)) (<= 100001 (+ |#StackHeapBarrier| v_main_~j~0_BEFORE_CALL_4)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_4|) (<= 2 |v_main_~#a~0.base_BEFORE_CALL_4|) (<= 1 (+ v_main_~i~0_BEFORE_CALL_4 |#StackHeapBarrier|)) (<= 2 (+ v_main_~i~0_BEFORE_CALL_4 |v_main_~#a~0.base_BEFORE_CALL_4|)) (<= 100000 v_main_~j~0_BEFORE_CALL_4) (= |#NULL.offset| 0) (<= 100000 (+ v_main_~i~0_BEFORE_CALL_4 v_main_~j~0_BEFORE_CALL_4)) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_4|)) (= |#NULL.base| 0)) (and (<= 1 |#StackHeapBarrier|) (= |v_main_~#a~0.offset_BEFORE_CALL_4| 0) (<= 100002 (+ v_main_~j~0_BEFORE_CALL_4 |v_main_~#a~0.base_BEFORE_CALL_4|)) (<= 100001 (+ |#StackHeapBarrier| v_main_~j~0_BEFORE_CALL_4)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_4|) (<= 2 |v_main_~#a~0.base_BEFORE_CALL_4|) (<= 1 (+ v_main_~i~0_BEFORE_CALL_4 |#StackHeapBarrier|)) (<= 2 (+ v_main_~i~0_BEFORE_CALL_4 |v_main_~#a~0.base_BEFORE_CALL_4|)) (<= 100000 v_main_~j~0_BEFORE_CALL_4) (= |#NULL.offset| 0) (<= 100000 (+ v_main_~i~0_BEFORE_CALL_4 v_main_~j~0_BEFORE_CALL_4)) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_4|)) (= |#NULL.base| 0))) (<= 100000 v_main_~i~0_BEFORE_CALL_4))))' at error location [2023-04-02 14:10:49,294 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:10:49,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:10:49,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-04-02 14:10:49,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783601098] [2023-04-02 14:10:49,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:10:49,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-02 14:10:49,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:10:49,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-02 14:10:49,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=923, Unknown=0, NotChecked=0, Total=1260 [2023-04-02 14:10:49,296 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:10:49,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:10:49,348 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2023-04-02 14:10:49,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-02 14:10:49,349 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 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 26 [2023-04-02 14:10:49,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:10:49,351 INFO L225 Difference]: With dead ends: 56 [2023-04-02 14:10:49,352 INFO L226 Difference]: Without dead ends: 42 [2023-04-02 14:10:49,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=337, Invalid=923, Unknown=0, NotChecked=0, Total=1260 [2023-04-02 14:10:49,357 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:10:49,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:10:49,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-04-02 14:10:49,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2023-04-02 14:10:49,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 states have internal predecessors, (39), 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) [2023-04-02 14:10:49,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2023-04-02 14:10:49,372 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 26 [2023-04-02 14:10:49,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:10:49,373 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2023-04-02 14:10:49,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:10:49,373 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2023-04-02 14:10:49,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-02 14:10:49,374 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:10:49,374 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:10:49,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 14:10:49,585 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 [2023-04-02 14:10:49,585 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:10:49,585 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:10:49,586 INFO L85 PathProgramCache]: Analyzing trace with hash 472188780, now seen corresponding path program 5 times [2023-04-02 14:10:49,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:10:49,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191090220] [2023-04-02 14:10:49,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:10:49,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:10:49,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:10:50,201 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 14:10:50,202 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:10:50,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191090220] [2023-04-02 14:10:50,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191090220] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:10:50,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493682842] [2023-04-02 14:10:50,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:10:50,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:10:50,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:10:50,209 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:10:50,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 14:10:50,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 14:10:50,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:10:50,288 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 14:10:50,291 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:10:50,368 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-04-02 14:10:50,368 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:10:50,476 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-04-02 14:10:50,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493682842] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:10:50,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [643902589] [2023-04-02 14:10:50,478 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-02 14:10:50,478 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:10:50,478 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:10:50,478 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:10:50,478 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:10:50,497 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:10:50,607 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 53 for LOIs [2023-04-02 14:10:50,647 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:10:50,650 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:10:51,227 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1462#(and (exists ((|v_main_~#a~0.base_BEFORE_CALL_5| Int) (v_main_~min~0_BEFORE_CALL_5 Int) (|v_main_~#a~0.offset_BEFORE_CALL_5| Int) (v_main_~j~0_BEFORE_CALL_5 Int) (v_main_~i~0_BEFORE_CALL_5 Int)) (and (<= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_5|) |v_main_~#a~0.offset_BEFORE_CALL_5|) v_main_~min~0_BEFORE_CALL_5) (or (and (<= 1 |#StackHeapBarrier|) (<= 1 (+ v_main_~i~0_BEFORE_CALL_5 |#StackHeapBarrier|)) (<= 100002 (+ v_main_~j~0_BEFORE_CALL_5 |v_main_~#a~0.base_BEFORE_CALL_5|)) (<= 100001 (+ |#StackHeapBarrier| v_main_~j~0_BEFORE_CALL_5)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_5|) (<= 100000 v_main_~j~0_BEFORE_CALL_5) (<= 2 |v_main_~#a~0.base_BEFORE_CALL_5|) (= |v_main_~#a~0.offset_BEFORE_CALL_5| 0) (<= 2 (+ v_main_~i~0_BEFORE_CALL_5 |v_main_~#a~0.base_BEFORE_CALL_5|)) (<= 100000 (+ v_main_~i~0_BEFORE_CALL_5 v_main_~j~0_BEFORE_CALL_5)) (= |#NULL.offset| 0) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_5|)) (= |#NULL.base| 0) (= v_main_~min~0_BEFORE_CALL_5 0)) (and (<= 1 |#StackHeapBarrier|) (<= 1 (+ v_main_~i~0_BEFORE_CALL_5 |#StackHeapBarrier|)) (<= 100002 (+ v_main_~j~0_BEFORE_CALL_5 |v_main_~#a~0.base_BEFORE_CALL_5|)) (<= 100001 (+ |#StackHeapBarrier| v_main_~j~0_BEFORE_CALL_5)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_5|) (<= 100000 v_main_~j~0_BEFORE_CALL_5) (<= 2 |v_main_~#a~0.base_BEFORE_CALL_5|) (= |v_main_~#a~0.offset_BEFORE_CALL_5| 0) (<= 2 (+ v_main_~i~0_BEFORE_CALL_5 |v_main_~#a~0.base_BEFORE_CALL_5|)) (<= 100000 (+ v_main_~i~0_BEFORE_CALL_5 v_main_~j~0_BEFORE_CALL_5)) (= |#NULL.offset| 0) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_5|)) (= |#NULL.base| 0))) (<= 100000 v_main_~i~0_BEFORE_CALL_5))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 14:10:51,227 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:10:51,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:10:51,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 7, 7] total 35 [2023-04-02 14:10:51,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699917778] [2023-04-02 14:10:51,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:10:51,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-04-02 14:10:51,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:10:51,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-04-02 14:10:51,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=1668, Unknown=0, NotChecked=0, Total=2070 [2023-04-02 14:10:51,230 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 35 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 35 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:10:51,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:10:51,294 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2023-04-02 14:10:51,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-04-02 14:10:51,295 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 35 states have internal predecessors, (45), 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 38 [2023-04-02 14:10:51,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:10:51,295 INFO L225 Difference]: With dead ends: 63 [2023-04-02 14:10:51,295 INFO L226 Difference]: Without dead ends: 49 [2023-04-02 14:10:51,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=402, Invalid=1668, Unknown=0, NotChecked=0, Total=2070 [2023-04-02 14:10:51,297 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:10:51,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 70 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:10:51,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-04-02 14:10:51,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2023-04-02 14:10:51,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 states have internal predecessors, (46), 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) [2023-04-02 14:10:51,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2023-04-02 14:10:51,302 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 38 [2023-04-02 14:10:51,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:10:51,303 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2023-04-02 14:10:51,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 35 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:10:51,303 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2023-04-02 14:10:51,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-02 14:10:51,304 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:10:51,304 INFO L195 NwaCegarLoop]: trace histogram [23, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:10:51,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 14:10:51,512 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 [2023-04-02 14:10:51,512 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:10:51,513 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:10:51,513 INFO L85 PathProgramCache]: Analyzing trace with hash -486008811, now seen corresponding path program 6 times [2023-04-02 14:10:51,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:10:51,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003281058] [2023-04-02 14:10:51,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:10:51,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:10:51,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:10:52,099 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-04-02 14:10:52,099 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:10:52,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003281058] [2023-04-02 14:10:52,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003281058] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:10:52,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188293480] [2023-04-02 14:10:52,100 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 14:10:52,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:10:52,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:10:52,101 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:10:52,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 14:10:52,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 14:10:52,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:10:52,213 INFO L262 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 25 conjunts are in the unsatisfiable core [2023-04-02 14:10:52,217 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:10:52,266 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-04-02 14:10:52,266 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:10:52,965 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-04-02 14:10:52,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188293480] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:10:52,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1095035879] [2023-04-02 14:10:52,967 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-02 14:10:52,968 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:10:52,969 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:10:52,969 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:10:52,969 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:10:52,982 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:10:53,084 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 53 for LOIs [2023-04-02 14:10:53,121 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:10:53,124 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:10:53,591 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1995#(and (exists ((|v_main_~#a~0.offset_BEFORE_CALL_6| Int) (v_main_~min~0_BEFORE_CALL_6 Int) (v_main_~i~0_BEFORE_CALL_6 Int) (|v_main_~#a~0.base_BEFORE_CALL_6| Int) (v_main_~j~0_BEFORE_CALL_6 Int)) (and (or (and (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_6|) (<= 1 |#StackHeapBarrier|) (= |v_main_~#a~0.offset_BEFORE_CALL_6| 0) (<= 2 (+ v_main_~i~0_BEFORE_CALL_6 |v_main_~#a~0.base_BEFORE_CALL_6|)) (<= 100002 (+ v_main_~j~0_BEFORE_CALL_6 |v_main_~#a~0.base_BEFORE_CALL_6|)) (<= 100000 (+ v_main_~i~0_BEFORE_CALL_6 v_main_~j~0_BEFORE_CALL_6)) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_6|)) (<= 100000 v_main_~j~0_BEFORE_CALL_6) (<= 1 (+ v_main_~i~0_BEFORE_CALL_6 |#StackHeapBarrier|)) (= |#NULL.offset| 0) (<= 100001 (+ |#StackHeapBarrier| v_main_~j~0_BEFORE_CALL_6)) (<= 2 |v_main_~#a~0.base_BEFORE_CALL_6|) (= |#NULL.base| 0)) (and (= v_main_~min~0_BEFORE_CALL_6 0) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_6|) (<= 1 |#StackHeapBarrier|) (= |v_main_~#a~0.offset_BEFORE_CALL_6| 0) (<= 2 (+ v_main_~i~0_BEFORE_CALL_6 |v_main_~#a~0.base_BEFORE_CALL_6|)) (<= 100002 (+ v_main_~j~0_BEFORE_CALL_6 |v_main_~#a~0.base_BEFORE_CALL_6|)) (<= 100000 (+ v_main_~i~0_BEFORE_CALL_6 v_main_~j~0_BEFORE_CALL_6)) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_6|)) (<= 100000 v_main_~j~0_BEFORE_CALL_6) (<= 1 (+ v_main_~i~0_BEFORE_CALL_6 |#StackHeapBarrier|)) (= |#NULL.offset| 0) (<= 100001 (+ |#StackHeapBarrier| v_main_~j~0_BEFORE_CALL_6)) (<= 2 |v_main_~#a~0.base_BEFORE_CALL_6|) (= |#NULL.base| 0))) (<= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_6|) |v_main_~#a~0.offset_BEFORE_CALL_6|) v_main_~min~0_BEFORE_CALL_6) (<= 100000 v_main_~i~0_BEFORE_CALL_6))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 14:10:53,591 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:10:53,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:10:53,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2023-04-02 14:10:53,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005442891] [2023-04-02 14:10:53,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:10:53,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-04-02 14:10:53,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:10:53,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-04-02 14:10:53,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1312, Invalid=2470, Unknown=0, NotChecked=0, Total=3782 [2023-04-02 14:10:53,595 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand has 51 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 51 states have internal predecessors, (59), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:10:53,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:10:53,685 INFO L93 Difference]: Finished difference Result 94 states and 122 transitions. [2023-04-02 14:10:53,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-04-02 14:10:53,686 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 51 states have internal predecessors, (59), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2023-04-02 14:10:53,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:10:53,689 INFO L225 Difference]: With dead ends: 94 [2023-04-02 14:10:53,689 INFO L226 Difference]: Without dead ends: 74 [2023-04-02 14:10:53,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1312, Invalid=2470, Unknown=0, NotChecked=0, Total=3782 [2023-04-02 14:10:53,692 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:10:53,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:10:53,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-04-02 14:10:53,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2023-04-02 14:10:53,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 68 states have internal predecessors, (71), 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) [2023-04-02 14:10:53,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2023-04-02 14:10:53,712 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 45 [2023-04-02 14:10:53,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:10:53,713 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2023-04-02 14:10:53,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 51 states have internal predecessors, (59), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:10:53,713 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2023-04-02 14:10:53,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-02 14:10:53,714 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:10:53,714 INFO L195 NwaCegarLoop]: trace histogram [48, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:10:53,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-02 14:10:53,917 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 [2023-04-02 14:10:53,917 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:10:53,917 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:10:53,917 INFO L85 PathProgramCache]: Analyzing trace with hash -853179732, now seen corresponding path program 7 times [2023-04-02 14:10:53,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:10:53,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308260502] [2023-04-02 14:10:53,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:10:53,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:10:53,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:10:55,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1231 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-04-02 14:10:55,693 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:10:55,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308260502] [2023-04-02 14:10:55,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308260502] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:10:55,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213133512] [2023-04-02 14:10:55,694 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 14:10:55,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:10:55,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:10:55,695 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) [2023-04-02 14:10:55,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-02 14:10:55,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:10:55,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 50 conjunts are in the unsatisfiable core [2023-04-02 14:10:55,868 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:10:55,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1231 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-04-02 14:10:55,959 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:10:58,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1231 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-04-02 14:10:58,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213133512] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:10:58,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [522059930] [2023-04-02 14:10:58,453 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-02 14:10:58,454 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:10:58,454 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:10:58,454 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:10:58,454 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:10:58,484 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:10:58,564 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 53 for LOIs [2023-04-02 14:10:58,598 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:10:58,600 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:10:59,237 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2840#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((v_main_~min~0_BEFORE_CALL_7 Int) (|v_main_~#a~0.offset_BEFORE_CALL_7| Int) (v_main_~i~0_BEFORE_CALL_7 Int) (|v_main_~#a~0.base_BEFORE_CALL_7| Int) (v_main_~j~0_BEFORE_CALL_7 Int)) (and (<= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_7|) |v_main_~#a~0.offset_BEFORE_CALL_7|) v_main_~min~0_BEFORE_CALL_7) (<= 100000 v_main_~i~0_BEFORE_CALL_7) (or (and (<= 1 |#StackHeapBarrier|) (<= 2 (+ v_main_~i~0_BEFORE_CALL_7 |v_main_~#a~0.base_BEFORE_CALL_7|)) (= |v_main_~#a~0.offset_BEFORE_CALL_7| 0) (<= 100002 (+ v_main_~j~0_BEFORE_CALL_7 |v_main_~#a~0.base_BEFORE_CALL_7|)) (<= 2 |v_main_~#a~0.base_BEFORE_CALL_7|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_7|) (<= 100001 (+ |#StackHeapBarrier| v_main_~j~0_BEFORE_CALL_7)) (<= 1 (+ v_main_~i~0_BEFORE_CALL_7 |#StackHeapBarrier|)) (<= 100000 (+ v_main_~i~0_BEFORE_CALL_7 v_main_~j~0_BEFORE_CALL_7)) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_7|)) (= |#NULL.offset| 0) (= v_main_~min~0_BEFORE_CALL_7 0) (= |#NULL.base| 0) (<= 100000 v_main_~j~0_BEFORE_CALL_7)) (and (<= 1 |#StackHeapBarrier|) (<= 2 (+ v_main_~i~0_BEFORE_CALL_7 |v_main_~#a~0.base_BEFORE_CALL_7|)) (= |v_main_~#a~0.offset_BEFORE_CALL_7| 0) (<= 100002 (+ v_main_~j~0_BEFORE_CALL_7 |v_main_~#a~0.base_BEFORE_CALL_7|)) (<= 2 |v_main_~#a~0.base_BEFORE_CALL_7|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_7|) (<= 100001 (+ |#StackHeapBarrier| v_main_~j~0_BEFORE_CALL_7)) (<= 1 (+ v_main_~i~0_BEFORE_CALL_7 |#StackHeapBarrier|)) (<= 100000 (+ v_main_~i~0_BEFORE_CALL_7 v_main_~j~0_BEFORE_CALL_7)) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_7|)) (= |#NULL.offset| 0) (= |#NULL.base| 0) (<= 100000 v_main_~j~0_BEFORE_CALL_7))))))' at error location [2023-04-02 14:10:59,237 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:10:59,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:10:59,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 101 [2023-04-02 14:10:59,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70737765] [2023-04-02 14:10:59,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:10:59,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2023-04-02 14:10:59,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:10:59,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2023-04-02 14:10:59,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5087, Invalid=7345, Unknown=0, NotChecked=0, Total=12432 [2023-04-02 14:10:59,244 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand has 101 states, 101 states have (on average 1.0792079207920793) internal successors, (109), 101 states have internal predecessors, (109), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:10:59,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:10:59,371 INFO L93 Difference]: Finished difference Result 144 states and 197 transitions. [2023-04-02 14:10:59,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-04-02 14:10:59,371 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.0792079207920793) internal successors, (109), 101 states have internal predecessors, (109), 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 70 [2023-04-02 14:10:59,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:10:59,372 INFO L225 Difference]: With dead ends: 144 [2023-04-02 14:10:59,372 INFO L226 Difference]: Without dead ends: 124 [2023-04-02 14:10:59,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1820 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5087, Invalid=7345, Unknown=0, NotChecked=0, Total=12432 [2023-04-02 14:10:59,376 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:10:59,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:10:59,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-04-02 14:10:59,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2023-04-02 14:10:59,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 118 states have (on average 1.0254237288135593) internal successors, (121), 118 states have internal predecessors, (121), 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) [2023-04-02 14:10:59,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2023-04-02 14:10:59,384 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 70 [2023-04-02 14:10:59,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:10:59,384 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2023-04-02 14:10:59,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.0792079207920793) internal successors, (109), 101 states have internal predecessors, (109), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:10:59,385 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2023-04-02 14:10:59,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-04-02 14:10:59,386 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:10:59,386 INFO L195 NwaCegarLoop]: trace histogram [98, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:10:59,394 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-04-02 14:10:59,592 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 [2023-04-02 14:10:59,593 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:10:59,593 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:10:59,593 INFO L85 PathProgramCache]: Analyzing trace with hash -612313396, now seen corresponding path program 8 times [2023-04-02 14:10:59,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:10:59,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913685813] [2023-04-02 14:10:59,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:10:59,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:10:59,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:11:05,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4906 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-04-02 14:11:05,192 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:11:05,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913685813] [2023-04-02 14:11:05,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913685813] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:11:05,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581870370] [2023-04-02 14:11:05,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:11:05,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:11:05,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:11:05,193 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) [2023-04-02 14:11:05,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-02 14:11:05,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-04-02 14:11:05,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:11:05,380 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-02 14:11:05,382 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:11:05,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4906 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2023-04-02 14:11:05,805 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:11:06,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4906 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2023-04-02 14:11:06,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581870370] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:11:06,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1106446803] [2023-04-02 14:11:06,314 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-02 14:11:06,315 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:11:06,315 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:11:06,315 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:11:06,315 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:11:06,328 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:11:06,409 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 53 for LOIs [2023-04-02 14:11:06,446 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:11:06,448 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:11:07,464 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4207#(and (exists ((v_main_~min~0_BEFORE_CALL_8 Int) (v_main_~i~0_BEFORE_CALL_8 Int) (|v_main_~#a~0.base_BEFORE_CALL_8| Int) (v_main_~j~0_BEFORE_CALL_8 Int) (|v_main_~#a~0.offset_BEFORE_CALL_8| Int)) (and (<= 100000 v_main_~i~0_BEFORE_CALL_8) (or (and (<= 1 |#StackHeapBarrier|) (<= 100000 v_main_~j~0_BEFORE_CALL_8) (<= 100002 (+ v_main_~j~0_BEFORE_CALL_8 |v_main_~#a~0.base_BEFORE_CALL_8|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_8|) (<= 100001 (+ |#StackHeapBarrier| v_main_~j~0_BEFORE_CALL_8)) (<= 2 (+ v_main_~i~0_BEFORE_CALL_8 |v_main_~#a~0.base_BEFORE_CALL_8|)) (<= 100000 (+ v_main_~i~0_BEFORE_CALL_8 v_main_~j~0_BEFORE_CALL_8)) (= |#NULL.offset| 0) (<= 2 |v_main_~#a~0.base_BEFORE_CALL_8|) (<= 1 (+ v_main_~i~0_BEFORE_CALL_8 |#StackHeapBarrier|)) (= |v_main_~#a~0.offset_BEFORE_CALL_8| 0) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_8|)) (= |#NULL.base| 0)) (and (= v_main_~min~0_BEFORE_CALL_8 0) (<= 1 |#StackHeapBarrier|) (<= 100000 v_main_~j~0_BEFORE_CALL_8) (<= 100002 (+ v_main_~j~0_BEFORE_CALL_8 |v_main_~#a~0.base_BEFORE_CALL_8|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_8|) (<= 100001 (+ |#StackHeapBarrier| v_main_~j~0_BEFORE_CALL_8)) (<= 2 (+ v_main_~i~0_BEFORE_CALL_8 |v_main_~#a~0.base_BEFORE_CALL_8|)) (<= 100000 (+ v_main_~i~0_BEFORE_CALL_8 v_main_~j~0_BEFORE_CALL_8)) (= |#NULL.offset| 0) (<= 2 |v_main_~#a~0.base_BEFORE_CALL_8|) (<= 1 (+ v_main_~i~0_BEFORE_CALL_8 |#StackHeapBarrier|)) (= |v_main_~#a~0.offset_BEFORE_CALL_8| 0) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_8|)) (= |#NULL.base| 0))) (<= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_8|) |v_main_~#a~0.offset_BEFORE_CALL_8|) v_main_~min~0_BEFORE_CALL_8))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 14:11:07,464 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:11:07,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:11:07,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 13, 13] total 123 [2023-04-02 14:11:07,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942585249] [2023-04-02 14:11:07,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:11:07,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2023-04-02 14:11:07,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:11:07,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2023-04-02 14:11:07,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5362, Invalid=12460, Unknown=0, NotChecked=0, Total=17822 [2023-04-02 14:11:07,471 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand has 123 states, 123 states have (on average 1.08130081300813) internal successors, (133), 123 states have internal predecessors, (133), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:11:07,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:11:07,626 INFO L93 Difference]: Finished difference Result 157 states and 173 transitions. [2023-04-02 14:11:07,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2023-04-02 14:11:07,627 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.08130081300813) internal successors, (133), 123 states have internal predecessors, (133), 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 120 [2023-04-02 14:11:07,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:11:07,628 INFO L225 Difference]: With dead ends: 157 [2023-04-02 14:11:07,628 INFO L226 Difference]: Without dead ends: 137 [2023-04-02 14:11:07,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3586 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=5362, Invalid=12460, Unknown=0, NotChecked=0, Total=17822 [2023-04-02 14:11:07,631 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:11:07,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 136 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:11:07,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-04-02 14:11:07,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2023-04-02 14:11:07,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 131 states have (on average 1.0229007633587786) internal successors, (134), 131 states have internal predecessors, (134), 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) [2023-04-02 14:11:07,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 139 transitions. [2023-04-02 14:11:07,639 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 139 transitions. Word has length 120 [2023-04-02 14:11:07,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:11:07,639 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 139 transitions. [2023-04-02 14:11:07,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.08130081300813) internal successors, (133), 123 states have internal predecessors, (133), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:11:07,640 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 139 transitions. [2023-04-02 14:11:07,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-04-02 14:11:07,641 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:11:07,641 INFO L195 NwaCegarLoop]: trace histogram [99, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:11:07,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-02 14:11:07,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-02 14:11:07,848 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:11:07,848 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:11:07,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1852352789, now seen corresponding path program 9 times [2023-04-02 14:11:07,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:11:07,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321196941] [2023-04-02 14:11:07,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:11:07,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:11:07,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:11:13,402 INFO L134 CoverageAnalysis]: Checked inductivity of 5203 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-04-02 14:11:13,402 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:11:13,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321196941] [2023-04-02 14:11:13,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321196941] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:11:13,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414976066] [2023-04-02 14:11:13,403 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 14:11:13,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:11:13,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:11:13,404 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:11:13,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-02 14:11:13,673 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 14:11:13,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:11:13,678 INFO L262 TraceCheckSpWp]: Trace formula consists of 1051 conjuncts, 101 conjunts are in the unsatisfiable core [2023-04-02 14:11:13,682 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:11:13,855 INFO L134 CoverageAnalysis]: Checked inductivity of 5203 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-04-02 14:11:13,855 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:11:23,101 INFO L134 CoverageAnalysis]: Checked inductivity of 5203 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-04-02 14:11:23,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414976066] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:11:23,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1938403042] [2023-04-02 14:11:23,104 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-02 14:11:23,104 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:11:23,104 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:11:23,104 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:11:23,105 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:11:23,125 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:11:23,198 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 53 for LOIs [2023-04-02 14:11:23,239 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:11:23,244 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:11:24,206 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5784#(and (exists ((v_main_~i~0_BEFORE_CALL_9 Int) (|v_main_~#a~0.base_BEFORE_CALL_9| Int) (v_main_~min~0_BEFORE_CALL_9 Int) (v_main_~j~0_BEFORE_CALL_9 Int) (|v_main_~#a~0.offset_BEFORE_CALL_9| Int)) (and (or (and (<= 100000 v_main_~j~0_BEFORE_CALL_9) (<= 1 |#StackHeapBarrier|) (= |v_main_~#a~0.offset_BEFORE_CALL_9| 0) (<= 2 |v_main_~#a~0.base_BEFORE_CALL_9|) (<= 1 (+ v_main_~i~0_BEFORE_CALL_9 |#StackHeapBarrier|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_9|) (<= 100000 (+ v_main_~i~0_BEFORE_CALL_9 v_main_~j~0_BEFORE_CALL_9)) (<= 100002 (+ v_main_~j~0_BEFORE_CALL_9 |v_main_~#a~0.base_BEFORE_CALL_9|)) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_9|)) (<= 100001 (+ |#StackHeapBarrier| v_main_~j~0_BEFORE_CALL_9)) (= |#NULL.offset| 0) (<= 2 (+ v_main_~i~0_BEFORE_CALL_9 |v_main_~#a~0.base_BEFORE_CALL_9|)) (= |#NULL.base| 0)) (and (<= 100000 v_main_~j~0_BEFORE_CALL_9) (<= 1 |#StackHeapBarrier|) (= |v_main_~#a~0.offset_BEFORE_CALL_9| 0) (= v_main_~min~0_BEFORE_CALL_9 0) (<= 2 |v_main_~#a~0.base_BEFORE_CALL_9|) (<= 1 (+ v_main_~i~0_BEFORE_CALL_9 |#StackHeapBarrier|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_9|) (<= 100000 (+ v_main_~i~0_BEFORE_CALL_9 v_main_~j~0_BEFORE_CALL_9)) (<= 100002 (+ v_main_~j~0_BEFORE_CALL_9 |v_main_~#a~0.base_BEFORE_CALL_9|)) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_9|)) (<= 100001 (+ |#StackHeapBarrier| v_main_~j~0_BEFORE_CALL_9)) (= |#NULL.offset| 0) (<= 2 (+ v_main_~i~0_BEFORE_CALL_9 |v_main_~#a~0.base_BEFORE_CALL_9|)) (= |#NULL.base| 0))) (<= 100000 v_main_~i~0_BEFORE_CALL_9) (<= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_9|) |v_main_~#a~0.offset_BEFORE_CALL_9|) v_main_~min~0_BEFORE_CALL_9))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 14:11:24,207 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:11:24,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:11:24,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102, 102] total 203 [2023-04-02 14:11:24,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134901842] [2023-04-02 14:11:24,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:11:24,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2023-04-02 14:11:24,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:11:24,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2023-04-02 14:11:24,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20540, Invalid=25042, Unknown=0, NotChecked=0, Total=45582 [2023-04-02 14:11:24,216 INFO L87 Difference]: Start difference. First operand 137 states and 139 transitions. Second operand has 203 states, 203 states have (on average 1.0394088669950738) internal successors, (211), 203 states have internal predecessors, (211), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:11:24,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:11:24,571 INFO L93 Difference]: Finished difference Result 270 states and 374 transitions. [2023-04-02 14:11:24,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2023-04-02 14:11:24,572 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.0394088669950738) internal successors, (211), 203 states have internal predecessors, (211), 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 133 [2023-04-02 14:11:24,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:11:24,573 INFO L225 Difference]: With dead ends: 270 [2023-04-02 14:11:24,573 INFO L226 Difference]: Without dead ends: 238 [2023-04-02 14:11:24,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3707 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=20540, Invalid=25042, Unknown=0, NotChecked=0, Total=45582 [2023-04-02 14:11:24,577 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:11:24,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 100 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:11:24,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2023-04-02 14:11:24,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 238. [2023-04-02 14:11:24,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 232 states have (on average 1.0129310344827587) internal successors, (235), 232 states have internal predecessors, (235), 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) [2023-04-02 14:11:24,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 240 transitions. [2023-04-02 14:11:24,587 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 240 transitions. Word has length 133 [2023-04-02 14:11:24,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:11:24,588 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 240 transitions. [2023-04-02 14:11:24,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.0394088669950738) internal successors, (211), 203 states have internal predecessors, (211), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:11:24,588 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 240 transitions. [2023-04-02 14:11:24,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2023-04-02 14:11:24,590 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:11:24,590 INFO L195 NwaCegarLoop]: trace histogram [200, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:11:24,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-02 14:11:24,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:11:24,798 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:11:24,798 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:11:24,799 INFO L85 PathProgramCache]: Analyzing trace with hash -528348820, now seen corresponding path program 10 times [2023-04-02 14:11:24,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:11:24,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441258392] [2023-04-02 14:11:24,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:11:24,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:11:25,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:11:44,412 INFO L134 CoverageAnalysis]: Checked inductivity of 20353 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-04-02 14:11:44,412 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:11:44,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441258392] [2023-04-02 14:11:44,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441258392] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:11:44,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308377776] [2023-04-02 14:11:44,412 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 14:11:44,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:11:44,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:11:44,413 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:11:44,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-02 14:11:44,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:11:44,885 INFO L262 TraceCheckSpWp]: Trace formula consists of 1960 conjuncts, 202 conjunts are in the unsatisfiable core [2023-04-02 14:11:44,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:11:45,187 INFO L134 CoverageAnalysis]: Checked inductivity of 20353 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-04-02 14:11:45,187 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:12:22,784 INFO L134 CoverageAnalysis]: Checked inductivity of 20353 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-04-02 14:12:22,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308377776] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:12:22,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [74011324] [2023-04-02 14:12:22,787 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-02 14:12:22,787 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:12:22,787 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:12:22,787 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:12:22,787 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:12:22,796 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:12:22,860 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 53 for LOIs [2023-04-02 14:12:22,883 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:12:22,885 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:12:24,483 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8597#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((v_main_~i~0_BEFORE_CALL_10 Int) (v_main_~min~0_BEFORE_CALL_10 Int) (v_main_~j~0_BEFORE_CALL_10 Int) (|v_main_~#a~0.offset_BEFORE_CALL_10| Int) (|v_main_~#a~0.base_BEFORE_CALL_10| Int)) (and (or (and (<= 1 |#StackHeapBarrier|) (<= 2 (+ v_main_~i~0_BEFORE_CALL_10 |v_main_~#a~0.base_BEFORE_CALL_10|)) (= v_main_~min~0_BEFORE_CALL_10 0) (<= 3 (+ |v_main_~#a~0.base_BEFORE_CALL_10| |#StackHeapBarrier|)) (<= 100001 (+ |#StackHeapBarrier| v_main_~j~0_BEFORE_CALL_10)) (<= 100002 (+ |v_main_~#a~0.base_BEFORE_CALL_10| v_main_~j~0_BEFORE_CALL_10)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_10|) (<= 1 (+ v_main_~i~0_BEFORE_CALL_10 |#StackHeapBarrier|)) (<= 100000 v_main_~j~0_BEFORE_CALL_10) (= |v_main_~#a~0.offset_BEFORE_CALL_10| 0) (<= 100000 (+ v_main_~i~0_BEFORE_CALL_10 v_main_~j~0_BEFORE_CALL_10)) (= |#NULL.offset| 0) (<= 2 |v_main_~#a~0.base_BEFORE_CALL_10|) (= |#NULL.base| 0)) (and (<= 1 |#StackHeapBarrier|) (<= 2 (+ v_main_~i~0_BEFORE_CALL_10 |v_main_~#a~0.base_BEFORE_CALL_10|)) (<= 3 (+ |v_main_~#a~0.base_BEFORE_CALL_10| |#StackHeapBarrier|)) (<= 100001 (+ |#StackHeapBarrier| v_main_~j~0_BEFORE_CALL_10)) (<= 100002 (+ |v_main_~#a~0.base_BEFORE_CALL_10| v_main_~j~0_BEFORE_CALL_10)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_10|) (<= 1 (+ v_main_~i~0_BEFORE_CALL_10 |#StackHeapBarrier|)) (<= 100000 v_main_~j~0_BEFORE_CALL_10) (= |v_main_~#a~0.offset_BEFORE_CALL_10| 0) (<= 100000 (+ v_main_~i~0_BEFORE_CALL_10 v_main_~j~0_BEFORE_CALL_10)) (= |#NULL.offset| 0) (<= 2 |v_main_~#a~0.base_BEFORE_CALL_10|) (= |#NULL.base| 0))) (<= 100000 v_main_~i~0_BEFORE_CALL_10) (<= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_10|) |v_main_~#a~0.offset_BEFORE_CALL_10|) v_main_~min~0_BEFORE_CALL_10))))' at error location [2023-04-02 14:12:24,484 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:12:24,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:12:24,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [203, 203, 203] total 405 [2023-04-02 14:12:24,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921978673] [2023-04-02 14:12:24,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:12:24,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2023-04-02 14:12:24,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:12:24,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2023-04-02 14:12:24,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81847, Invalid=90793, Unknown=0, NotChecked=0, Total=172640 [2023-04-02 14:12:24,503 INFO L87 Difference]: Start difference. First operand 238 states and 240 transitions. Second operand has 405 states, 405 states have (on average 1.019753086419753) internal successors, (413), 405 states have internal predecessors, (413), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:12:26,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:12:26,315 INFO L93 Difference]: Finished difference Result 472 states and 677 transitions. [2023-04-02 14:12:26,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2023-04-02 14:12:26,316 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 1.019753086419753) internal successors, (413), 405 states have internal predecessors, (413), 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 234 [2023-04-02 14:12:26,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:12:26,318 INFO L225 Difference]: With dead ends: 472 [2023-04-02 14:12:26,318 INFO L226 Difference]: Without dead ends: 440 [2023-04-02 14:12:26,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 904 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 414 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7444 ImplicationChecksByTransitivity, 51.5s TimeCoverageRelationStatistics Valid=81847, Invalid=90793, Unknown=0, NotChecked=0, Total=172640 [2023-04-02 14:12:26,325 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 14:12:26,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 78 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 14:12:26,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2023-04-02 14:12:26,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 440. [2023-04-02 14:12:26,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 434 states have (on average 1.0069124423963134) internal successors, (437), 434 states have internal predecessors, (437), 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) [2023-04-02 14:12:26,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 442 transitions. [2023-04-02 14:12:26,341 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 442 transitions. Word has length 234 [2023-04-02 14:12:26,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:12:26,341 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 442 transitions. [2023-04-02 14:12:26,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 1.019753086419753) internal successors, (413), 405 states have internal predecessors, (413), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:12:26,342 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 442 transitions. [2023-04-02 14:12:26,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2023-04-02 14:12:26,347 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:12:26,348 INFO L195 NwaCegarLoop]: trace histogram [402, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:12:26,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-04-02 14:12:26,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-02 14:12:26,557 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:12:26,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:12:26,557 INFO L85 PathProgramCache]: Analyzing trace with hash 923046668, now seen corresponding path program 11 times [2023-04-02 14:12:26,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:12:26,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309281442] [2023-04-02 14:12:26,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:12:26,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:12:27,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:13:45,393 INFO L134 CoverageAnalysis]: Checked inductivity of 81256 backedges. 0 proven. 81003 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-04-02 14:13:45,393 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:13:45,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309281442] [2023-04-02 14:13:45,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309281442] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:13:45,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815518827] [2023-04-02 14:13:45,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:13:45,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:13:45,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:13:45,401 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:13:45,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-02 14:13:46,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2023-04-02 14:13:46,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:13:46,305 INFO L262 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-02 14:13:46,310 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:13:49,451 INFO L134 CoverageAnalysis]: Checked inductivity of 81256 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 81003 trivial. 0 not checked. [2023-04-02 14:13:49,452 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:13:52,989 INFO L134 CoverageAnalysis]: Checked inductivity of 81256 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 81003 trivial. 0 not checked. [2023-04-02 14:13:52,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815518827] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:13:52,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1808544447] [2023-04-02 14:13:52,992 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-02 14:13:52,992 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:13:52,993 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:13:52,993 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:13:52,993 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:13:53,006 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:13:53,079 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 53 for LOIs [2023-04-02 14:13:53,103 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:13:53,105 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:13:56,010 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13476#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#a~0.offset_BEFORE_CALL_11| Int) (v_main_~min~0_BEFORE_CALL_11 Int) (v_main_~i~0_BEFORE_CALL_11 Int) (v_main_~j~0_BEFORE_CALL_11 Int) (|v_main_~#a~0.base_BEFORE_CALL_11| Int)) (and (<= 100000 v_main_~i~0_BEFORE_CALL_11) (or (and (<= 1 |#StackHeapBarrier|) (<= 100001 (+ |#StackHeapBarrier| v_main_~j~0_BEFORE_CALL_11)) (<= 100000 v_main_~j~0_BEFORE_CALL_11) (= v_main_~min~0_BEFORE_CALL_11 0) (<= 2 (+ v_main_~i~0_BEFORE_CALL_11 |v_main_~#a~0.base_BEFORE_CALL_11|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_11|) (<= 100002 (+ |v_main_~#a~0.base_BEFORE_CALL_11| v_main_~j~0_BEFORE_CALL_11)) (<= 3 (+ |v_main_~#a~0.base_BEFORE_CALL_11| |#StackHeapBarrier|)) (<= 1 (+ v_main_~i~0_BEFORE_CALL_11 |#StackHeapBarrier|)) (<= 100000 (+ v_main_~i~0_BEFORE_CALL_11 v_main_~j~0_BEFORE_CALL_11)) (= |v_main_~#a~0.offset_BEFORE_CALL_11| 0) (= |#NULL.offset| 0) (<= 2 |v_main_~#a~0.base_BEFORE_CALL_11|) (= |#NULL.base| 0)) (and (<= 1 |#StackHeapBarrier|) (<= 100001 (+ |#StackHeapBarrier| v_main_~j~0_BEFORE_CALL_11)) (<= 100000 v_main_~j~0_BEFORE_CALL_11) (<= 2 (+ v_main_~i~0_BEFORE_CALL_11 |v_main_~#a~0.base_BEFORE_CALL_11|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_11|) (<= 100002 (+ |v_main_~#a~0.base_BEFORE_CALL_11| v_main_~j~0_BEFORE_CALL_11)) (<= 3 (+ |v_main_~#a~0.base_BEFORE_CALL_11| |#StackHeapBarrier|)) (<= 1 (+ v_main_~i~0_BEFORE_CALL_11 |#StackHeapBarrier|)) (<= 100000 (+ v_main_~i~0_BEFORE_CALL_11 v_main_~j~0_BEFORE_CALL_11)) (= |v_main_~#a~0.offset_BEFORE_CALL_11| 0) (= |#NULL.offset| 0) (<= 2 |v_main_~#a~0.base_BEFORE_CALL_11|) (= |#NULL.base| 0))) (<= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_11|) |v_main_~#a~0.offset_BEFORE_CALL_11|) v_main_~min~0_BEFORE_CALL_11))))' at error location [2023-04-02 14:13:56,010 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:13:56,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:13:56,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [405, 25, 25] total 451 [2023-04-02 14:13:56,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973452083] [2023-04-02 14:13:56,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:13:56,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 451 states [2023-04-02 14:13:56,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:13:56,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 451 interpolants. [2023-04-02 14:13:56,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82974, Invalid=130008, Unknown=0, NotChecked=0, Total=212982 [2023-04-02 14:13:56,031 INFO L87 Difference]: Start difference. First operand 440 states and 442 transitions. Second operand has 451 states, 451 states have (on average 1.0221729490022173) internal successors, (461), 451 states have internal predecessors, (461), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:13:57,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:13:57,919 INFO L93 Difference]: Finished difference Result 497 states and 525 transitions. [2023-04-02 14:13:57,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 451 states. [2023-04-02 14:13:57,920 INFO L78 Accepts]: Start accepts. Automaton has has 451 states, 451 states have (on average 1.0221729490022173) internal successors, (461), 451 states have internal predecessors, (461), 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 436 [2023-04-02 14:13:57,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:13:57,922 INFO L225 Difference]: With dead ends: 497 [2023-04-02 14:13:57,922 INFO L226 Difference]: Without dead ends: 465 [2023-04-02 14:13:57,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1712 GetRequests, 1252 SyntacticMatches, 0 SemanticMatches, 460 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23662 ImplicationChecksByTransitivity, 59.1s TimeCoverageRelationStatistics Valid=82974, Invalid=130008, Unknown=0, NotChecked=0, Total=212982 [2023-04-02 14:13:57,930 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 14:13:57,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 103 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 14:13:57,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2023-04-02 14:13:57,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 465. [2023-04-02 14:13:57,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 459 states have (on average 1.0065359477124183) internal successors, (462), 459 states have internal predecessors, (462), 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) [2023-04-02 14:13:57,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 467 transitions. [2023-04-02 14:13:57,950 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 467 transitions. Word has length 436 [2023-04-02 14:13:57,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:13:57,950 INFO L495 AbstractCegarLoop]: Abstraction has 465 states and 467 transitions. [2023-04-02 14:13:57,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 451 states, 451 states have (on average 1.0221729490022173) internal successors, (461), 451 states have internal predecessors, (461), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:13:57,951 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 467 transitions. [2023-04-02 14:13:57,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2023-04-02 14:13:57,958 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:13:57,958 INFO L195 NwaCegarLoop]: trace histogram [403, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:13:57,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-02 14:13:58,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-02 14:13:58,167 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:13:58,167 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:13:58,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1624476267, now seen corresponding path program 12 times [2023-04-02 14:13:58,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:13:58,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639338913] [2023-04-02 14:13:58,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:13:58,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:13:58,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat