/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 EqDomain -i ../sv-benchmarks/c/array-examples/standard_minInArray_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 08:44:23,334 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 08:44:23,336 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 08:44:23,362 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 08:44:23,362 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 08:44:23,363 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 08:44:23,364 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 08:44:23,365 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 08:44:23,367 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 08:44:23,367 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 08:44:23,368 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 08:44:23,369 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 08:44:23,369 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 08:44:23,370 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 08:44:23,371 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 08:44:23,372 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 08:44:23,373 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 08:44:23,373 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 08:44:23,374 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 08:44:23,376 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 08:44:23,377 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 08:44:23,378 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 08:44:23,379 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 08:44:23,379 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 08:44:23,382 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 08:44:23,385 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 08:44:23,385 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 08:44:23,386 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 08:44:23,387 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 08:44:23,387 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 08:44:23,387 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 08:44:23,388 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 08:44:23,388 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 08:44:23,388 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 08:44:23,389 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 08:44:23,390 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 08:44:23,391 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 08:44:23,408 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 08:44:23,409 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 08:44:23,409 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 08:44:23,409 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 08:44:23,410 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 08:44:23,410 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 08:44:23,410 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 08:44:23,410 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 08:44:23,411 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 08:44:23,411 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 08:44:23,411 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 08:44:23,411 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 08:44:23,411 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 08:44:23,412 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 08:44:23,412 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 08:44:23,412 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 08:44:23,412 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 08:44:23,412 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 08:44:23,413 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 08:44:23,413 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 08:44:23,413 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 08:44:23,414 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 08:44:23,414 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 08:44:23,414 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 08:44:23,414 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 08:44:23,414 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 08:44:23,414 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 08:44:23,415 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 08:44:23,415 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 08:44:23,415 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 08:44:23,415 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 08:44:23,415 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 08:44:23,415 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 08:44:23,416 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 08:44:23,416 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 08:44:23,416 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 08:44:23,416 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 08:44:23,416 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 08:44:23,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 08:44:23,416 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 08:44:23,416 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 08:44:23,417 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 08:44:23,639 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 08:44:23,661 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 08:44:23,664 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 08:44:23,665 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 08:44:23,665 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 08:44:23,666 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_minInArray_ground-2.i [2023-04-01 08:44:24,774 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 08:44:24,904 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 08:44:24,905 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_minInArray_ground-2.i [2023-04-01 08:44:24,910 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/adc44706b/6c982deec975431daf1c748a7bd38a47/FLAG88bdc861e [2023-04-01 08:44:24,924 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/adc44706b/6c982deec975431daf1c748a7bd38a47 [2023-04-01 08:44:24,928 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 08:44:24,929 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 08:44:24,932 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 08:44:24,932 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 08:44:24,935 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 08:44:24,935 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:44:24" (1/1) ... [2023-04-01 08:44:24,936 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2603eeb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:44:24, skipping insertion in model container [2023-04-01 08:44:24,936 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:44:24" (1/1) ... [2023-04-01 08:44:24,942 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 08:44:24,955 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 08:44:25,086 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-2.i[821,834] [2023-04-01 08:44:25,103 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 08:44:25,111 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 08:44:25,122 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-2.i[821,834] [2023-04-01 08:44:25,129 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 08:44:25,139 INFO L208 MainTranslator]: Completed translation [2023-04-01 08:44:25,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:44:25 WrapperNode [2023-04-01 08:44:25,140 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 08:44:25,141 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 08:44:25,141 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 08:44:25,141 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 08:44:25,150 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:44:25" (1/1) ... [2023-04-01 08:44:25,150 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:44:25" (1/1) ... [2023-04-01 08:44:25,157 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:44:25" (1/1) ... [2023-04-01 08:44:25,157 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:44:25" (1/1) ... [2023-04-01 08:44:25,171 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:44:25" (1/1) ... [2023-04-01 08:44:25,174 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:44:25" (1/1) ... [2023-04-01 08:44:25,175 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:44:25" (1/1) ... [2023-04-01 08:44:25,175 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:44:25" (1/1) ... [2023-04-01 08:44:25,176 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 08:44:25,177 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 08:44:25,177 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 08:44:25,177 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 08:44:25,178 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:44:25" (1/1) ... [2023-04-01 08:44:25,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 08:44:25,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:44:25,202 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 08:44:25,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 08:44:25,238 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 08:44:25,238 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 08:44:25,238 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 08:44:25,240 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 08:44:25,240 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 08:44:25,240 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 08:44:25,240 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 08:44:25,240 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 08:44:25,240 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 08:44:25,240 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 08:44:25,240 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 08:44:25,241 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 08:44:25,241 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 08:44:25,241 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 08:44:25,241 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 08:44:25,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 08:44:25,241 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 08:44:25,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 08:44:25,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 08:44:25,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 08:44:25,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 08:44:25,308 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 08:44:25,310 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 08:44:25,481 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 08:44:25,515 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 08:44:25,515 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 08:44:25,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:44:25 BoogieIcfgContainer [2023-04-01 08:44:25,517 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 08:44:25,519 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 08:44:25,519 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 08:44:25,522 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 08:44:25,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 08:44:24" (1/3) ... [2023-04-01 08:44:25,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fe0426d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:44:25, skipping insertion in model container [2023-04-01 08:44:25,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:44:25" (2/3) ... [2023-04-01 08:44:25,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fe0426d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:44:25, skipping insertion in model container [2023-04-01 08:44:25,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:44:25" (3/3) ... [2023-04-01 08:44:25,524 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_minInArray_ground-2.i [2023-04-01 08:44:25,538 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 08:44:25,539 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 08:44:25,572 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 08:44:25,578 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;@4a0ecf7e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 08:44:25,578 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 08:44:25,581 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) [2023-04-01 08:44:25,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-01 08:44:25,586 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:44:25,586 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:44:25,587 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:44:25,590 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:44:25,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1635828427, now seen corresponding path program 1 times [2023-04-01 08:44:25,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:44:25,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950863893] [2023-04-01 08:44:25,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:44:25,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:44:25,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:44:25,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 08:44:25,826 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:44:25,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950863893] [2023-04-01 08:44:25,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950863893] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 08:44:25,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 08:44:25,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 08:44:25,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156874656] [2023-04-01 08:44:25,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 08:44:25,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 08:44:25,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:44:25,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 08:44:25,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 08:44:25,855 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) [2023-04-01 08:44:25,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:44:25,887 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2023-04-01 08:44:25,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 08:44:25,889 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 [2023-04-01 08:44:25,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:44:25,893 INFO L225 Difference]: With dead ends: 34 [2023-04-01 08:44:25,894 INFO L226 Difference]: Without dead ends: 18 [2023-04-01 08:44:25,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 08:44:25,899 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:44:25,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:44:25,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-04-01 08:44:25,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-04-01 08:44:25,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 08:44:25,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2023-04-01 08:44:25,928 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 12 [2023-04-01 08:44:25,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:44:25,928 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2023-04-01 08:44:25,928 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) [2023-04-01 08:44:25,929 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2023-04-01 08:44:25,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-01 08:44:25,929 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:44:25,929 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:44:25,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 08:44:25,931 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:44:25,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:44:25,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1063216603, now seen corresponding path program 1 times [2023-04-01 08:44:25,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:44:25,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039494121] [2023-04-01 08:44:25,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:44:25,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:44:25,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:44:26,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 08:44:26,103 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:44:26,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039494121] [2023-04-01 08:44:26,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039494121] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:44:26,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651039002] [2023-04-01 08:44:26,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:44:26,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:44:26,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:44:26,117 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:44:26,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 08:44:26,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:44:26,184 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 08:44:26,187 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:44:26,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 08:44:26,233 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:44:26,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 08:44:26,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651039002] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:44:26,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [739224196] [2023-04-01 08:44:26,312 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 08:44:26,313 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:44:26,318 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:44:26,322 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:44:26,324 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:44:26,489 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 08:44:26,977 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2023-04-01 08:44:26,983 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:44:26,991 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:44:27,296 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '191#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 08:44:27,297 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:44:27,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:44:27,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-01 08:44:27,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606589502] [2023-04-01 08:44:27,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:44:27,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 08:44:27,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:44:27,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 08:44:27,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2023-04-01 08:44:27,302 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) [2023-04-01 08:44:27,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:44:27,337 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2023-04-01 08:44:27,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 08:44:27,338 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 [2023-04-01 08:44:27,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:44:27,338 INFO L225 Difference]: With dead ends: 35 [2023-04-01 08:44:27,339 INFO L226 Difference]: Without dead ends: 24 [2023-04-01 08:44:27,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2023-04-01 08:44:27,342 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:44:27,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:44:27,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-04-01 08:44:27,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-04-01 08:44:27,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 08:44:27,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2023-04-01 08:44:27,351 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 14 [2023-04-01 08:44:27,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:44:27,352 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2023-04-01 08:44:27,352 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) [2023-04-01 08:44:27,352 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2023-04-01 08:44:27,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-01 08:44:27,353 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:44:27,353 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:44:27,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 08:44:27,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:44:27,559 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:44:27,559 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:44:27,560 INFO L85 PathProgramCache]: Analyzing trace with hash -696449717, now seen corresponding path program 2 times [2023-04-01 08:44:27,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:44:27,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068928886] [2023-04-01 08:44:27,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:44:27,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:44:27,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:44:27,712 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 08:44:27,713 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:44:27,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068928886] [2023-04-01 08:44:27,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068928886] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:44:27,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957337322] [2023-04-01 08:44:27,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 08:44:27,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:44:27,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:44:27,715 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:44:27,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 08:44:27,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 08:44:27,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:44:27,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 08:44:27,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:44:27,823 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 08:44:27,823 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:44:27,871 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 08:44:27,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957337322] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:44:27,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [561542996] [2023-04-01 08:44:27,873 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 08:44:27,873 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:44:27,873 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:44:27,873 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:44:27,873 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:44:27,907 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 08:44:28,200 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2023-04-01 08:44:28,205 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:44:28,209 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:44:28,525 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '429#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 08:44:28,525 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:44:28,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:44:28,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-04-01 08:44:28,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154537254] [2023-04-01 08:44:28,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:44:28,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 08:44:28,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:44:28,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 08:44:28,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2023-04-01 08:44:28,530 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) [2023-04-01 08:44:28,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:44:28,589 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2023-04-01 08:44:28,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 08:44:28,590 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 [2023-04-01 08:44:28,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:44:28,592 INFO L225 Difference]: With dead ends: 50 [2023-04-01 08:44:28,592 INFO L226 Difference]: Without dead ends: 36 [2023-04-01 08:44:28,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2023-04-01 08:44:28,595 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:44:28,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:44:28,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-04-01 08:44:28,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-04-01 08:44:28,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 08:44:28,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2023-04-01 08:44:28,610 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 20 [2023-04-01 08:44:28,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:44:28,610 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2023-04-01 08:44:28,611 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) [2023-04-01 08:44:28,611 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2023-04-01 08:44:28,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 08:44:28,611 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:44:28,612 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:44:28,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 08:44:28,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-01 08:44:28,818 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:44:28,818 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:44:28,818 INFO L85 PathProgramCache]: Analyzing trace with hash 353499403, now seen corresponding path program 3 times [2023-04-01 08:44:28,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:44:28,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800866029] [2023-04-01 08:44:28,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:44:28,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:44:28,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:44:29,090 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-04-01 08:44:29,090 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:44:29,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800866029] [2023-04-01 08:44:29,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800866029] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:44:29,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526776538] [2023-04-01 08:44:29,091 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 08:44:29,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:44:29,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:44:29,092 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:44:29,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 08:44:29,179 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 08:44:29,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:44:29,183 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 08:44:29,185 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:44:29,210 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-04-01 08:44:29,210 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:44:29,380 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-04-01 08:44:29,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526776538] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:44:29,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [352313530] [2023-04-01 08:44:29,383 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 08:44:29,383 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:44:29,383 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:44:29,383 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:44:29,383 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:44:29,411 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 08:44:29,595 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2023-04-01 08:44:29,600 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:44:29,602 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:44:29,885 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '805#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 08:44:29,885 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:44:29,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:44:29,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-04-01 08:44:29,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408142059] [2023-04-01 08:44:29,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:44:29,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-01 08:44:29,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:44:29,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-01 08:44:29,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=864, Unknown=0, NotChecked=0, Total=1190 [2023-04-01 08:44:29,887 INFO L87 Difference]: Start difference. First operand 36 states and 38 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) [2023-04-01 08:44:29,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:44:29,974 INFO L93 Difference]: Finished difference Result 80 states and 107 transitions. [2023-04-01 08:44:29,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-01 08:44:29,974 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 32 [2023-04-01 08:44:29,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:44:29,975 INFO L225 Difference]: With dead ends: 80 [2023-04-01 08:44:29,975 INFO L226 Difference]: Without dead ends: 60 [2023-04-01 08:44:29,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=326, Invalid=864, Unknown=0, NotChecked=0, Total=1190 [2023-04-01 08:44:29,977 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 08:44:29,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 08:44:29,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-04-01 08:44:29,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2023-04-01 08:44:29,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 54 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 08:44:29,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2023-04-01 08:44:29,983 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 32 [2023-04-01 08:44:29,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:44:29,984 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2023-04-01 08:44:29,984 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) [2023-04-01 08:44:29,984 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2023-04-01 08:44:29,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-01 08:44:29,991 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:44:29,991 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:44:29,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 08:44:30,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:44:30,197 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:44:30,197 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:44:30,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1873510539, now seen corresponding path program 4 times [2023-04-01 08:44:30,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:44:30,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134874110] [2023-04-01 08:44:30,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:44:30,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:44:30,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:44:30,785 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-04-01 08:44:30,785 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:44:30,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134874110] [2023-04-01 08:44:30,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134874110] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:44:30,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198266752] [2023-04-01 08:44:30,785 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 08:44:30,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:44:30,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:44:30,786 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:44:30,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 08:44:30,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:44:30,903 INFO L262 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-01 08:44:30,905 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:44:30,944 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-04-01 08:44:30,945 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:44:31,579 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-04-01 08:44:31,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198266752] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:44:31,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2072108645] [2023-04-01 08:44:31,581 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 08:44:31,581 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:44:31,581 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:44:31,581 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:44:31,582 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:44:31,604 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 08:44:31,744 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2023-04-01 08:44:31,747 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:44:31,771 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:44:32,083 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1457#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 08:44:32,083 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:44:32,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:44:32,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2023-04-01 08:44:32,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198964198] [2023-04-01 08:44:32,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:44:32,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-04-01 08:44:32,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:44:32,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-04-01 08:44:32,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1202, Invalid=2220, Unknown=0, NotChecked=0, Total=3422 [2023-04-01 08:44:32,087 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 49 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:44:32,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:44:32,327 INFO L93 Difference]: Finished difference Result 140 states and 191 transitions. [2023-04-01 08:44:32,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-04-01 08:44:32,328 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 49 states have internal predecessors, (57), 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 56 [2023-04-01 08:44:32,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:44:32,329 INFO L225 Difference]: With dead ends: 140 [2023-04-01 08:44:32,329 INFO L226 Difference]: Without dead ends: 108 [2023-04-01 08:44:32,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1202, Invalid=2220, Unknown=0, NotChecked=0, Total=3422 [2023-04-01 08:44:32,331 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 08:44:32,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 08:44:32,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-04-01 08:44:32,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2023-04-01 08:44:32,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 102 states have (on average 1.0294117647058822) internal successors, (105), 102 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 08:44:32,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2023-04-01 08:44:32,353 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 56 [2023-04-01 08:44:32,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:44:32,354 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2023-04-01 08:44:32,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 49 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:44:32,354 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2023-04-01 08:44:32,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-04-01 08:44:32,356 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:44:32,356 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:44:32,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 08:44:32,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:44:32,563 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:44:32,563 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:44:32,563 INFO L85 PathProgramCache]: Analyzing trace with hash 912068491, now seen corresponding path program 5 times [2023-04-01 08:44:32,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:44:32,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864721262] [2023-04-01 08:44:32,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:44:32,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:44:32,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:44:34,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2023-04-01 08:44:34,700 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:44:34,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864721262] [2023-04-01 08:44:34,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864721262] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:44:34,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826426368] [2023-04-01 08:44:34,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 08:44:34,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:44:34,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:44:34,705 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:44:34,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 08:44:49,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2023-04-01 08:44:49,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:44:49,880 INFO L262 TraceCheckSpWp]: Trace formula consists of 670 conjuncts, 48 conjunts are in the unsatisfiable core [2023-04-01 08:44:49,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:44:49,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2023-04-01 08:44:49,962 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:44:52,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2023-04-01 08:44:52,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826426368] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:44:52,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1454390014] [2023-04-01 08:44:52,406 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 08:44:52,406 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:44:52,406 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:44:52,407 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:44:52,407 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:44:52,428 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 08:44:52,564 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2023-04-01 08:44:52,566 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:44:52,568 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:44:52,968 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2661#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 08:44:52,968 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:44:52,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:44:52,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2023-04-01 08:44:52,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84272535] [2023-04-01 08:44:52,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:44:52,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2023-04-01 08:44:52,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:44:52,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2023-04-01 08:44:52,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4682, Invalid=6660, Unknown=0, NotChecked=0, Total=11342 [2023-04-01 08:44:52,974 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand has 97 states, 97 states have (on average 1.577319587628866) internal successors, (153), 97 states have internal predecessors, (153), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:44:53,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:44:53,489 INFO L93 Difference]: Finished difference Result 260 states and 359 transitions. [2023-04-01 08:44:53,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-04-01 08:44:53,490 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.577319587628866) internal successors, (153), 97 states have internal predecessors, (153), 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 104 [2023-04-01 08:44:53,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:44:53,491 INFO L225 Difference]: With dead ends: 260 [2023-04-01 08:44:53,491 INFO L226 Difference]: Without dead ends: 204 [2023-04-01 08:44:53,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1607 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4682, Invalid=6660, Unknown=0, NotChecked=0, Total=11342 [2023-04-01 08:44:53,496 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 08:44:53,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 89 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 08:44:53,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2023-04-01 08:44:53,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2023-04-01 08:44:53,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 198 states have (on average 1.0151515151515151) internal successors, (201), 198 states have internal predecessors, (201), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 08:44:53,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 206 transitions. [2023-04-01 08:44:53,509 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 206 transitions. Word has length 104 [2023-04-01 08:44:53,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:44:53,509 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 206 transitions. [2023-04-01 08:44:53,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.577319587628866) internal successors, (153), 97 states have internal predecessors, (153), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:44:53,509 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 206 transitions. [2023-04-01 08:44:53,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2023-04-01 08:44:53,511 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:44:53,511 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:44:53,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 08:44:53,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:44:53,712 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:44:53,712 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:44:53,712 INFO L85 PathProgramCache]: Analyzing trace with hash -407229045, now seen corresponding path program 6 times [2023-04-01 08:44:53,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:44:53,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96299451] [2023-04-01 08:44:53,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:44:53,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:44:53,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:44:59,835 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2023-04-01 08:44:59,835 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:44:59,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96299451] [2023-04-01 08:44:59,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96299451] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:44:59,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691618712] [2023-04-01 08:44:59,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 08:44:59,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:44:59,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:44:59,837 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:44:59,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 08:45:00,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 08:45:00,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:45:00,160 INFO L262 TraceCheckSpWp]: Trace formula consists of 1294 conjuncts, 96 conjunts are in the unsatisfiable core [2023-04-01 08:45:00,167 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:45:00,332 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2023-04-01 08:45:00,332 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:45:09,147 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2023-04-01 08:45:09,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691618712] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:45:09,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [433146570] [2023-04-01 08:45:09,150 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 08:45:09,150 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:45:09,150 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:45:09,150 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:45:09,150 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:45:09,180 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 08:45:09,333 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2023-04-01 08:45:09,336 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:45:09,338 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:45:09,995 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4969#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 08:45:09,995 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:45:09,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:45:09,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 193 [2023-04-01 08:45:09,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363140034] [2023-04-01 08:45:09,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:45:09,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2023-04-01 08:45:09,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:45:10,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2023-04-01 08:45:10,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18554, Invalid=22452, Unknown=0, NotChecked=0, Total=41006 [2023-04-01 08:45:10,007 INFO L87 Difference]: Start difference. First operand 204 states and 206 transitions. Second operand has 193 states, 193 states have (on average 1.0414507772020725) internal successors, (201), 193 states have internal predecessors, (201), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:45:14,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:45:14,137 INFO L93 Difference]: Finished difference Result 500 states and 695 transitions. [2023-04-01 08:45:14,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2023-04-01 08:45:14,138 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 1.0414507772020725) internal successors, (201), 193 states have internal predecessors, (201), 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 200 [2023-04-01 08:45:14,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:45:14,140 INFO L225 Difference]: With dead ends: 500 [2023-04-01 08:45:14,140 INFO L226 Difference]: Without dead ends: 396 [2023-04-01 08:45:14,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 696 GetRequests, 495 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3239 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=18554, Invalid=22452, Unknown=0, NotChecked=0, Total=41006 [2023-04-01 08:45:14,143 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 916 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 916 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 08:45:14,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 78 Invalid, 1322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [916 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 08:45:14,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2023-04-01 08:45:14,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 396. [2023-04-01 08:45:14,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 390 states have (on average 1.0076923076923077) internal successors, (393), 390 states have internal predecessors, (393), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 08:45:14,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 398 transitions. [2023-04-01 08:45:14,168 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 398 transitions. Word has length 200 [2023-04-01 08:45:14,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:45:14,168 INFO L495 AbstractCegarLoop]: Abstraction has 396 states and 398 transitions. [2023-04-01 08:45:14,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 1.0414507772020725) internal successors, (201), 193 states have internal predecessors, (201), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:45:14,169 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 398 transitions. [2023-04-01 08:45:14,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2023-04-01 08:45:14,174 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:45:14,174 INFO L195 NwaCegarLoop]: trace histogram [190, 190, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:45:14,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 08:45:14,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:45:14,382 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:45:14,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:45:14,382 INFO L85 PathProgramCache]: Analyzing trace with hash -899913333, now seen corresponding path program 7 times [2023-04-01 08:45:14,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:45:14,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351331345] [2023-04-01 08:45:14,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:45:14,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:45:14,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat