/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/array-lopstr16/break-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 02:59:17,077 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 02:59:17,079 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 02:59:17,111 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 02:59:17,112 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 02:59:17,114 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 02:59:17,117 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 02:59:17,119 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 02:59:17,120 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 02:59:17,124 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 02:59:17,126 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 02:59:17,127 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 02:59:17,127 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 02:59:17,129 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 02:59:17,130 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 02:59:17,131 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 02:59:17,131 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 02:59:17,132 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 02:59:17,133 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 02:59:17,138 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 02:59:17,139 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 02:59:17,140 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 02:59:17,140 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 02:59:17,141 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 02:59:17,147 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 02:59:17,150 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 02:59:17,150 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 02:59:17,151 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 02:59:17,152 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 02:59:17,152 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 02:59:17,152 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 02:59:17,153 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 02:59:17,153 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 02:59:17,153 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 02:59:17,153 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 02:59:17,154 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 02:59:17,155 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 02:59:17,180 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 02:59:17,180 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 02:59:17,181 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 02:59:17,181 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 02:59:17,182 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 02:59:17,182 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 02:59:17,182 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 02:59:17,182 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 02:59:17,182 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 02:59:17,182 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 02:59:17,183 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 02:59:17,183 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 02:59:17,183 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 02:59:17,184 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 02:59:17,184 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 02:59:17,184 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 02:59:17,184 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 02:59:17,184 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 02:59:17,185 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 02:59:17,185 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 02:59:17,185 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 02:59:17,185 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 02:59:17,185 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 02:59:17,186 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 02:59:17,186 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 02:59:17,186 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 02:59:17,186 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 02:59:17,186 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 02:59:17,187 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 02:59:17,187 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 02:59:17,187 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 02:59:17,187 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 02:59:17,187 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 02:59:17,187 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 02:59:17,187 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 02:59:17,187 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 02:59:17,187 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 02:59:17,188 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 02:59:17,188 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 02:59:17,188 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 02:59:17,188 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 02:59:17,188 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 02:59:17,415 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 02:59:17,428 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 02:59:17,429 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 02:59:17,430 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 02:59:17,430 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 02:59:17,431 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-lopstr16/break-2.i [2023-04-01 02:59:18,490 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 02:59:18,637 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 02:59:18,638 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-lopstr16/break-2.i [2023-04-01 02:59:18,642 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6000e111e/3e9a598e762a401fa03c287a68254725/FLAG1bf325fda [2023-04-01 02:59:18,653 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6000e111e/3e9a598e762a401fa03c287a68254725 [2023-04-01 02:59:18,655 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 02:59:18,656 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 02:59:18,658 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 02:59:18,658 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 02:59:18,660 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 02:59:18,661 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 02:59:18" (1/1) ... [2023-04-01 02:59:18,661 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60be35cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:59:18, skipping insertion in model container [2023-04-01 02:59:18,662 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 02:59:18" (1/1) ... [2023-04-01 02:59:18,666 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 02:59:18,675 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 02:59:18,776 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-lopstr16/break-2.i[800,813] [2023-04-01 02:59:18,787 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 02:59:23,027 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 02:59:23,039 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-lopstr16/break-2.i[800,813] [2023-04-01 02:59:23,042 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 02:59:23,052 INFO L208 MainTranslator]: Completed translation [2023-04-01 02:59:23,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:59:23 WrapperNode [2023-04-01 02:59:23,053 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 02:59:23,054 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 02:59:23,054 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 02:59:23,054 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 02:59:23,062 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:59:23" (1/1) ... [2023-04-01 02:59:23,062 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:59:23" (1/1) ... [2023-04-01 02:59:23,067 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:59:23" (1/1) ... [2023-04-01 02:59:23,067 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:59:23" (1/1) ... [2023-04-01 02:59:23,070 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:59:23" (1/1) ... [2023-04-01 02:59:23,072 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:59:23" (1/1) ... [2023-04-01 02:59:23,073 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:59:23" (1/1) ... [2023-04-01 02:59:23,074 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:59:23" (1/1) ... [2023-04-01 02:59:23,075 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 02:59:23,075 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 02:59:23,075 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 02:59:23,076 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 02:59:23,076 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:59:23" (1/1) ... [2023-04-01 02:59:23,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 02:59:23,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:59:23,097 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 02:59:23,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 02:59:23,123 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 02:59:23,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 02:59:23,124 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 02:59:23,125 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 02:59:23,125 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 02:59:23,125 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 02:59:23,125 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 02:59:23,125 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 02:59:23,125 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 02:59:23,125 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 02:59:23,125 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 02:59:23,125 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 02:59:23,125 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 02:59:23,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 02:59:23,126 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 02:59:23,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 02:59:23,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 02:59:23,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 02:59:23,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 02:59:23,195 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 02:59:23,197 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 02:59:23,352 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 02:59:23,373 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 02:59:23,373 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 02:59:23,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 02:59:23 BoogieIcfgContainer [2023-04-01 02:59:23,375 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 02:59:23,379 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 02:59:23,379 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 02:59:23,381 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 02:59:23,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 02:59:18" (1/3) ... [2023-04-01 02:59:23,382 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6834eaf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 02:59:23, skipping insertion in model container [2023-04-01 02:59:23,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:59:23" (2/3) ... [2023-04-01 02:59:23,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6834eaf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 02:59:23, skipping insertion in model container [2023-04-01 02:59:23,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 02:59:23" (3/3) ... [2023-04-01 02:59:23,388 INFO L112 eAbstractionObserver]: Analyzing ICFG break-2.i [2023-04-01 02:59:23,401 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 02:59:23,401 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 02:59:23,435 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 02:59:23,440 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;@775df080, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 02:59:23,440 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 02:59:23,444 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 02:59:23,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-01 02:59:23,449 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:59:23,449 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:59:23,450 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:59:23,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:59:23,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1797247767, now seen corresponding path program 1 times [2023-04-01 02:59:23,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:59:23,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353308671] [2023-04-01 02:59:23,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:59:23,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:59:23,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:59:23,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:59:23,626 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:59:23,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353308671] [2023-04-01 02:59:23,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353308671] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 02:59:23,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 02:59:23,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 02:59:23,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551632994] [2023-04-01 02:59:23,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 02:59:23,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 02:59:23,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:59:23,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 02:59:23,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 02:59:23,650 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 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 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:59:23,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:59:23,684 INFO L93 Difference]: Finished difference Result 44 states and 57 transitions. [2023-04-01 02:59:23,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 02:59:23,686 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-04-01 02:59:23,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:59:23,793 INFO L225 Difference]: With dead ends: 44 [2023-04-01 02:59:23,793 INFO L226 Difference]: Without dead ends: 26 [2023-04-01 02:59:23,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 02:59:23,797 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 4 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:59:23,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 30 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:59:23,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-04-01 02:59:23,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2023-04-01 02:59:23,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:59:23,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2023-04-01 02:59:23,835 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 13 [2023-04-01 02:59:23,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:59:23,835 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2023-04-01 02:59:23,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:59:23,836 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2023-04-01 02:59:23,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-01 02:59:23,836 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:59:23,836 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:59:23,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 02:59:23,837 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:59:23,837 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:59:23,837 INFO L85 PathProgramCache]: Analyzing trace with hash -195052990, now seen corresponding path program 1 times [2023-04-01 02:59:23,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:59:23,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892323060] [2023-04-01 02:59:23,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:59:23,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:59:23,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:59:23,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:59:23,910 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:59:23,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892323060] [2023-04-01 02:59:23,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892323060] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:59:23,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743218586] [2023-04-01 02:59:23,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:59:23,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:59:23,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:59:23,913 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:59:23,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 02:59:23,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:59:23,983 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 02:59:23,986 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:59:24,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:59:24,020 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:59:24,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:59:24,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743218586] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:59:24,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [430488290] [2023-04-01 02:59:24,058 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-01 02:59:24,059 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:59:24,061 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:59:24,065 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:59:24,065 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:59:24,184 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-04-01 02:59:24,266 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-04-01 02:59:24,285 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2023-04-01 02:59:24,314 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:59:24,643 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '213#(and (<= 1 |#StackHeapBarrier|) (= |~#s~0.base| 3) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= (select (select |#memory_int| 3) 0) 10)) (= |~#s~0.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:59:24,647 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:59:24,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:59:24,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-01 02:59:24,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33525840] [2023-04-01 02:59:24,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:59:24,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 02:59:24,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:59:24,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 02:59:24,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-04-01 02:59:24,654 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:59:24,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:59:24,712 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2023-04-01 02:59:24,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 02:59:24,712 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 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 15 [2023-04-01 02:59:24,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:59:24,713 INFO L225 Difference]: With dead ends: 51 [2023-04-01 02:59:24,713 INFO L226 Difference]: Without dead ends: 37 [2023-04-01 02:59:24,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-04-01 02:59:24,715 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 26 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:59:24,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 33 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:59:24,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-04-01 02:59:24,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2023-04-01 02:59:24,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 02:59:24,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2023-04-01 02:59:24,720 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 15 [2023-04-01 02:59:24,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:59:24,720 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2023-04-01 02:59:24,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:59:24,720 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2023-04-01 02:59:24,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-01 02:59:24,721 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:59:24,721 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:59:24,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 02:59:24,925 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 02:59:24,925 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:59:24,926 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:59:24,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1152100192, now seen corresponding path program 1 times [2023-04-01 02:59:24,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:59:24,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804247476] [2023-04-01 02:59:24,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:59:24,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:59:24,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:59:25,037 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:59:25,037 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:59:25,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804247476] [2023-04-01 02:59:25,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804247476] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:59:25,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120227113] [2023-04-01 02:59:25,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:59:25,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:59:25,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:59:25,040 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:59:25,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 02:59:25,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:59:25,110 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 02:59:25,112 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:59:25,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:59:25,131 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:59:25,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:59:25,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120227113] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:59:25,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1443142351] [2023-04-01 02:59:25,177 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-01 02:59:25,177 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:59:25,178 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:59:25,178 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:59:25,178 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:59:25,233 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-04-01 02:59:25,285 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-04-01 02:59:25,297 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2023-04-01 02:59:25,312 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:59:25,591 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '453#(and (<= 1 |#StackHeapBarrier|) (= |~#s~0.base| 3) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= (select (select |#memory_int| 3) 0) 10)) (= |~#s~0.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:59:25,591 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:59:25,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:59:25,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-04-01 02:59:25,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117385957] [2023-04-01 02:59:25,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:59:25,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 02:59:25,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:59:25,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 02:59:25,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2023-04-01 02:59:25,594 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:59:25,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:59:25,664 INFO L93 Difference]: Finished difference Result 78 states and 95 transitions. [2023-04-01 02:59:25,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 02:59:25,665 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-04-01 02:59:25,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:59:25,666 INFO L225 Difference]: With dead ends: 78 [2023-04-01 02:59:25,666 INFO L226 Difference]: Without dead ends: 59 [2023-04-01 02:59:25,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2023-04-01 02:59:25,667 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 42 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:59:25,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 38 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:59:25,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-04-01 02:59:25,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2023-04-01 02:59:25,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-01 02:59:25,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2023-04-01 02:59:25,676 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 18 [2023-04-01 02:59:25,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:59:25,677 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2023-04-01 02:59:25,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:59:25,677 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2023-04-01 02:59:25,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-01 02:59:25,678 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:59:25,678 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:59:25,698 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-01 02:59:25,882 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 02:59:25,883 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:59:25,883 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:59:25,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1563746108, now seen corresponding path program 2 times [2023-04-01 02:59:25,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:59:25,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920101637] [2023-04-01 02:59:25,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:59:25,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:59:25,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:59:25,989 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:59:25,990 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:59:25,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920101637] [2023-04-01 02:59:25,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920101637] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:59:25,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324980986] [2023-04-01 02:59:25,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:59:25,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:59:25,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:59:26,010 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:59:26,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 02:59:26,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-04-01 02:59:26,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:59:26,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 02:59:26,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:59:26,087 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:59:26,087 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:59:26,166 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:59:26,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324980986] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:59:26,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1942127085] [2023-04-01 02:59:26,167 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-01 02:59:26,168 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:59:26,168 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:59:26,168 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:59:26,168 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:59:26,201 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-04-01 02:59:26,229 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-04-01 02:59:26,237 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2023-04-01 02:59:26,246 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:59:26,516 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '827#(and (<= 1 |#StackHeapBarrier|) (= |~#s~0.base| 3) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= (select (select |#memory_int| 3) 0) 10)) (= |~#s~0.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:59:26,517 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:59:26,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:59:26,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-04-01 02:59:26,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218390056] [2023-04-01 02:59:26,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:59:26,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 02:59:26,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:59:26,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 02:59:26,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=601, Unknown=0, NotChecked=0, Total=812 [2023-04-01 02:59:26,519 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:59:26,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:59:26,669 INFO L93 Difference]: Finished difference Result 154 states and 191 transitions. [2023-04-01 02:59:26,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 02:59:26,669 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2023-04-01 02:59:26,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:59:26,671 INFO L225 Difference]: With dead ends: 154 [2023-04-01 02:59:26,671 INFO L226 Difference]: Without dead ends: 115 [2023-04-01 02:59:26,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=211, Invalid=601, Unknown=0, NotChecked=0, Total=812 [2023-04-01 02:59:26,672 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 96 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:59:26,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 55 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:59:26,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-04-01 02:59:26,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2023-04-01 02:59:26,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 95 states have (on average 1.0315789473684212) internal successors, (98), 95 states have internal predecessors, (98), 16 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-04-01 02:59:26,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 129 transitions. [2023-04-01 02:59:26,691 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 129 transitions. Word has length 26 [2023-04-01 02:59:26,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:59:26,691 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 129 transitions. [2023-04-01 02:59:26,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:59:26,691 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 129 transitions. [2023-04-01 02:59:26,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-01 02:59:26,692 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:59:26,692 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:59:26,697 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 02:59:26,894 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 02:59:26,895 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:59:26,895 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:59:26,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1048238196, now seen corresponding path program 3 times [2023-04-01 02:59:26,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:59:26,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104459489] [2023-04-01 02:59:26,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:59:26,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:59:26,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:59:27,292 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:59:27,292 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:59:27,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104459489] [2023-04-01 02:59:27,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104459489] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:59:27,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870953950] [2023-04-01 02:59:27,293 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 02:59:27,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:59:27,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:59:27,301 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:59:27,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 02:59:27,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 02:59:27,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:59:27,401 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-01 02:59:27,403 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:59:27,456 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:59:27,456 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:59:27,779 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:59:27,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870953950] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:59:27,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2092872375] [2023-04-01 02:59:27,781 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-01 02:59:27,781 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:59:27,781 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:59:27,781 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:59:27,781 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:59:27,857 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-04-01 02:59:27,878 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-04-01 02:59:27,884 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2023-04-01 02:59:27,890 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:59:28,178 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1501#(and (<= 1 |#StackHeapBarrier|) (= |~#s~0.base| 3) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= (select (select |#memory_int| 3) 0) 10)) (= |~#s~0.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:59:28,178 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:59:28,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:59:28,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2023-04-01 02:59:28,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380407468] [2023-04-01 02:59:28,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:59:28,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-04-01 02:59:28,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:59:28,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-04-01 02:59:28,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=1345, Unknown=0, NotChecked=0, Total=1980 [2023-04-01 02:59:28,181 INFO L87 Difference]: Start difference. First operand 114 states and 129 transitions. Second operand has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 33 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:59:28,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:59:28,464 INFO L93 Difference]: Finished difference Result 306 states and 383 transitions. [2023-04-01 02:59:28,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-04-01 02:59:28,465 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 33 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2023-04-01 02:59:28,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:59:28,466 INFO L225 Difference]: With dead ends: 306 [2023-04-01 02:59:28,466 INFO L226 Difference]: Without dead ends: 227 [2023-04-01 02:59:28,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=635, Invalid=1345, Unknown=0, NotChecked=0, Total=1980 [2023-04-01 02:59:28,468 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 264 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 02:59:28,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 72 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 02:59:28,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2023-04-01 02:59:28,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 226. [2023-04-01 02:59:28,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 191 states have (on average 1.0157068062827226) internal successors, (194), 191 states have internal predecessors, (194), 32 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-04-01 02:59:28,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 257 transitions. [2023-04-01 02:59:28,484 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 257 transitions. Word has length 42 [2023-04-01 02:59:28,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:59:28,485 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 257 transitions. [2023-04-01 02:59:28,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 33 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:59:28,485 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 257 transitions. [2023-04-01 02:59:28,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-01 02:59:28,486 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:59:28,486 INFO L195 NwaCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:59:28,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 02:59:28,692 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 02:59:28,692 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:59:28,693 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:59:28,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1104512284, now seen corresponding path program 4 times [2023-04-01 02:59:28,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:59:28,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177037338] [2023-04-01 02:59:28,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:59:28,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:59:28,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:59:29,338 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:59:29,338 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:59:29,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177037338] [2023-04-01 02:59:29,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177037338] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:59:29,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797131255] [2023-04-01 02:59:29,338 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 02:59:29,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:59:29,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:59:29,346 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:59:29,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 02:59:29,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:59:29,423 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 32 conjunts are in the unsatisfiable core [2023-04-01 02:59:29,425 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:59:29,496 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:59:29,496 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:59:30,469 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:59:30,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797131255] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:59:30,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1278890631] [2023-04-01 02:59:30,471 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-01 02:59:30,471 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:59:30,471 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:59:30,471 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:59:30,471 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:59:30,504 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-04-01 02:59:30,533 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-04-01 02:59:30,541 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2023-04-01 02:59:30,548 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:59:30,902 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2775#(and (<= 1 |#StackHeapBarrier|) (= |~#s~0.base| 3) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= (select (select |#memory_int| 3) 0) 10)) (= |~#s~0.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:59:30,902 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:59:30,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:59:30,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2023-04-01 02:59:30,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933227415] [2023-04-01 02:59:30,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:59:30,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-04-01 02:59:30,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:59:30,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-04-01 02:59:30,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2251, Invalid=3601, Unknown=0, NotChecked=0, Total=5852 [2023-04-01 02:59:30,907 INFO L87 Difference]: Start difference. First operand 226 states and 257 transitions. Second operand has 65 states, 65 states have (on average 2.0923076923076924) internal successors, (136), 65 states have internal predecessors, (136), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:59:31,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:59:31,779 INFO L93 Difference]: Finished difference Result 610 states and 767 transitions. [2023-04-01 02:59:31,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-04-01 02:59:31,780 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.0923076923076924) internal successors, (136), 65 states have internal predecessors, (136), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2023-04-01 02:59:31,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:59:31,782 INFO L225 Difference]: With dead ends: 610 [2023-04-01 02:59:31,782 INFO L226 Difference]: Without dead ends: 451 [2023-04-01 02:59:31,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1314 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2251, Invalid=3601, Unknown=0, NotChecked=0, Total=5852 [2023-04-01 02:59:31,785 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 789 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 498 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 851 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 498 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 02:59:31,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [851 Valid, 112 Invalid, 886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [498 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 02:59:31,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2023-04-01 02:59:31,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 450. [2023-04-01 02:59:31,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 383 states have (on average 1.0078328981723237) internal successors, (386), 383 states have internal predecessors, (386), 64 states have call successors, (64), 3 states have call predecessors, (64), 2 states have return successors, (63), 63 states have call predecessors, (63), 63 states have call successors, (63) [2023-04-01 02:59:31,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 513 transitions. [2023-04-01 02:59:31,806 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 513 transitions. Word has length 74 [2023-04-01 02:59:31,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:59:31,807 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 513 transitions. [2023-04-01 02:59:31,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.0923076923076924) internal successors, (136), 65 states have internal predecessors, (136), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:59:31,807 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 513 transitions. [2023-04-01 02:59:31,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-04-01 02:59:31,809 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:59:31,810 INFO L195 NwaCegarLoop]: trace histogram [63, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:59:31,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 02:59:32,015 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 02:59:32,016 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:59:32,016 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:59:32,016 INFO L85 PathProgramCache]: Analyzing trace with hash 177766340, now seen corresponding path program 5 times [2023-04-01 02:59:32,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:59:32,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278288133] [2023-04-01 02:59:32,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:59:32,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:59:32,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:59:34,458 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:59:34,458 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:59:34,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278288133] [2023-04-01 02:59:34,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278288133] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:59:34,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393619254] [2023-04-01 02:59:34,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:59:34,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:59:34,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:59:34,465 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:59:34,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process