/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/loops/compact.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:57:43,854 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:57:43,855 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:57:43,881 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:57:43,881 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:57:43,882 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:57:43,883 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:57:43,884 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:57:43,885 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:57:43,886 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:57:43,886 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:57:43,887 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:57:43,888 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:57:43,888 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:57:43,889 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:57:43,890 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:57:43,890 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:57:43,891 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:57:43,892 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:57:43,893 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:57:43,894 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:57:43,896 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:57:43,897 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:57:43,898 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:57:43,900 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:57:43,900 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:57:43,900 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:57:43,901 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:57:43,901 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:57:43,902 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:57:43,902 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:57:43,903 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:57:43,903 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:57:43,904 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:57:43,904 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:57:43,905 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:57:43,905 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:57:43,905 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:57:43,906 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:57:43,906 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:57:43,907 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:57:43,913 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 04:57:43,934 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:57:43,934 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:57:43,934 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:57:43,934 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:57:43,935 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:57:43,935 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:57:43,935 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:57:43,935 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:57:43,935 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:57:43,935 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:57:43,935 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:57:43,936 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:57:43,936 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:57:43,936 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:57:43,936 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:57:43,936 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:57:43,936 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:57:43,936 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:57:43,943 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:57:43,944 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:57:43,944 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:57:43,944 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:57:43,944 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:57:43,944 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:57:43,944 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:57:43,945 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:57:43,945 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:57:43,945 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:57:43,945 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:57:43,945 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:57:43,945 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:57:43,946 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:57:43,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:57:43,946 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:57:43,946 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:57:43,946 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:57:43,947 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:57:43,947 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:57:43,947 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:57:43,947 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:57:43,947 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:57:43,947 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:57:44,151 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:57:44,168 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:57:44,169 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:57:44,170 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:57:44,171 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:57:44,172 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/compact.c [2023-04-01 04:57:45,224 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:57:45,355 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:57:45,356 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/compact.c [2023-04-01 04:57:45,360 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb96b2700/50f6d589855846f29ef13e5a3ea17863/FLAGbc453ea64 [2023-04-01 04:57:45,373 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb96b2700/50f6d589855846f29ef13e5a3ea17863 [2023-04-01 04:57:45,376 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:57:45,377 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:57:45,381 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:57:45,381 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:57:45,383 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:57:45,383 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:57:45" (1/1) ... [2023-04-01 04:57:45,384 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e5b92e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:57:45, skipping insertion in model container [2023-04-01 04:57:45,385 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:57:45" (1/1) ... [2023-04-01 04:57:45,390 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:57:45,399 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:57:45,512 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/loops/compact.c[609,622] [2023-04-01 04:57:45,516 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:57:45,525 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:57:45,537 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/loops/compact.c[609,622] [2023-04-01 04:57:45,538 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:57:45,551 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:57:45,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:57:45 WrapperNode [2023-04-01 04:57:45,551 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:57:45,552 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:57:45,552 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:57:45,552 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:57:45,560 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:57:45" (1/1) ... [2023-04-01 04:57:45,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:57:45" (1/1) ... [2023-04-01 04:57:45,564 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:57:45" (1/1) ... [2023-04-01 04:57:45,565 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:57:45" (1/1) ... [2023-04-01 04:57:45,576 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:57:45" (1/1) ... [2023-04-01 04:57:45,579 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:57:45" (1/1) ... [2023-04-01 04:57:45,580 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:57:45" (1/1) ... [2023-04-01 04:57:45,580 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:57:45" (1/1) ... [2023-04-01 04:57:45,582 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:57:45,582 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:57:45,582 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:57:45,583 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:57:45,583 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:57:45" (1/1) ... [2023-04-01 04:57:45,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:57:45,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:57:45,610 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 04:57:45,612 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 04:57:45,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:57:45,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:57:45,644 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:57:45,644 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:57:45,647 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:57:45,647 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:57:45,647 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:57:45,648 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:57:45,648 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 04:57:45,648 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:57:45,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:57:45,648 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:57:45,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:57:45,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:57:45,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:57:45,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:57:45,732 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:57:45,734 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:57:45,888 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:57:45,910 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:57:45,910 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 04:57:45,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:57:45 BoogieIcfgContainer [2023-04-01 04:57:45,912 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:57:45,913 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:57:45,913 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:57:45,915 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:57:45,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:57:45" (1/3) ... [2023-04-01 04:57:45,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6256755a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:57:45, skipping insertion in model container [2023-04-01 04:57:45,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:57:45" (2/3) ... [2023-04-01 04:57:45,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6256755a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:57:45, skipping insertion in model container [2023-04-01 04:57:45,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:57:45" (3/3) ... [2023-04-01 04:57:45,917 INFO L112 eAbstractionObserver]: Analyzing ICFG compact.c [2023-04-01 04:57:45,949 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:57:45,949 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:57:45,997 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:57:46,002 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;@684a57dd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:57:46,003 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:57:46,006 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 8 states have (on average 1.5) internal successors, (12), 9 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:57:46,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-04-01 04:57:46,012 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:57:46,013 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:57:46,013 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:57:46,017 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:57:46,018 INFO L85 PathProgramCache]: Analyzing trace with hash 186090600, now seen corresponding path program 1 times [2023-04-01 04:57:46,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:57:46,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586666507] [2023-04-01 04:57:46,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:57:46,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:57:46,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:57:46,230 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 04:57:46,231 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:57:46,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586666507] [2023-04-01 04:57:46,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586666507] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:57:46,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:57:46,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:57:46,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313964079] [2023-04-01 04:57:46,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:57:46,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:57:46,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:57:46,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:57:46,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:57:46,262 INFO L87 Difference]: Start difference. First operand has 14 states, 8 states have (on average 1.5) internal successors, (12), 9 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:57:46,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:57:46,317 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2023-04-01 04:57:46,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:57:46,319 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2023-04-01 04:57:46,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:57:46,323 INFO L225 Difference]: With dead ends: 27 [2023-04-01 04:57:46,324 INFO L226 Difference]: Without dead ends: 13 [2023-04-01 04:57:46,326 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 04:57:46,328 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 3 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 15 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 04:57:46,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 15 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 04:57:46,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-04-01 04:57:46,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2023-04-01 04:57:46,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:57:46,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2023-04-01 04:57:46,353 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2023-04-01 04:57:46,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:57:46,353 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2023-04-01 04:57:46,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:57:46,353 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2023-04-01 04:57:46,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:57:46,354 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:57:46,354 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:57:46,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:57:46,355 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:57:46,355 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:57:46,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1093406714, now seen corresponding path program 1 times [2023-04-01 04:57:46,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:57:46,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452909079] [2023-04-01 04:57:46,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:57:46,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:57:46,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:57:46,536 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 04:57:46,536 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:57:46,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452909079] [2023-04-01 04:57:46,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452909079] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:57:46,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645007281] [2023-04-01 04:57:46,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:57:46,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:57:46,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:57:46,541 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 04:57:46,544 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 04:57:46,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:57:46,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 04:57:46,637 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:57:46,666 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 04:57:46,666 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:57:46,721 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 04:57:46,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645007281] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:57:46,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1329429716] [2023-04-01 04:57:46,740 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-04-01 04:57:46,740 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:57:46,743 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:57:46,746 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:57:46,747 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:57:46,884 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-04-01 04:57:47,088 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2023-04-01 04:57:47,112 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:57:47,414 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '146#(and (<= 1 |#StackHeapBarrier|) (= |main_#in~argv.offset| main_~argv.offset) (<= 102400 (mod main_~i~0 4294967296)) (<= main_~ND~0 127) (= |main_#in~argv.base| main_~argv.base) (= |~#array~0.offset| 0) (<= 0 main_~i~0) (= 4 |~#array~0.base|) (= |#NULL.offset| 0) (<= 0 (+ 128 main_~ND~0)) (= |main_#in~argc| main_~argc) (= |#NULL.base| 0))' at error location [2023-04-01 04:57:47,414 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:57:47,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:57:47,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-01 04:57:47,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100292078] [2023-04-01 04:57:47,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:57:47,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 04:57:47,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:57:47,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 04:57:47,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-04-01 04:57:47,417 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:57:47,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:57:47,467 INFO L93 Difference]: Finished difference Result 26 states and 33 transitions. [2023-04-01 04:57:47,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 04:57:47,467 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), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 04:57:47,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:57:47,468 INFO L225 Difference]: With dead ends: 26 [2023-04-01 04:57:47,468 INFO L226 Difference]: Without dead ends: 21 [2023-04-01 04:57:47,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-04-01 04:57:47,469 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 4 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:57:47,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 21 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 04:57:47,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-04-01 04:57:47,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-04-01 04:57:47,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:57:47,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2023-04-01 04:57:47,478 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 11 [2023-04-01 04:57:47,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:57:47,478 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2023-04-01 04:57:47,479 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), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:57:47,479 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2023-04-01 04:57:47,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-01 04:57:47,480 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:57:47,480 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:57:47,488 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 04:57:47,685 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 04:57:47,687 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:57:47,687 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:57:47,687 INFO L85 PathProgramCache]: Analyzing trace with hash 373284588, now seen corresponding path program 2 times [2023-04-01 04:57:47,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:57:47,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142012253] [2023-04-01 04:57:47,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:57:47,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:57:47,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:57:47,944 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 04:57:47,945 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:57:47,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142012253] [2023-04-01 04:57:47,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142012253] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:57:47,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713492286] [2023-04-01 04:57:47,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 04:57:47,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:57:47,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:57:47,947 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 04:57:47,949 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 04:57:48,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 04:57:48,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 04:57:48,026 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 04:57:48,027 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:57:48,066 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 04:57:48,067 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:57:48,136 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 04:57:48,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713492286] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:57:48,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [522182101] [2023-04-01 04:57:48,149 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-04-01 04:57:48,149 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:57:48,150 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:57:48,150 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:57:48,150 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:57:48,203 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-04-01 04:57:48,343 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2023-04-01 04:57:48,355 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:57:48,661 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '363#(and (<= 1 |#StackHeapBarrier|) (= |main_#in~argv.offset| main_~argv.offset) (<= 102400 (mod main_~i~0 4294967296)) (<= main_~ND~0 127) (= |main_#in~argv.base| main_~argv.base) (= |~#array~0.offset| 0) (<= 0 main_~i~0) (= 4 |~#array~0.base|) (= |#NULL.offset| 0) (<= 0 (+ 128 main_~ND~0)) (= |main_#in~argc| main_~argc) (= |#NULL.base| 0))' at error location [2023-04-01 04:57:48,662 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:57:48,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:57:48,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-04-01 04:57:48,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972047165] [2023-04-01 04:57:48,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:57:48,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 04:57:48,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:57:48,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 04:57:48,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2023-04-01 04:57:48,665 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:57:48,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:57:48,959 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2023-04-01 04:57:48,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 04:57:48,959 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 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 04:57:48,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:57:48,960 INFO L225 Difference]: With dead ends: 50 [2023-04-01 04:57:48,960 INFO L226 Difference]: Without dead ends: 39 [2023-04-01 04:57:48,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=132, Invalid=420, Unknown=0, NotChecked=0, Total=552 [2023-04-01 04:57:48,961 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 32 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:57:48,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 29 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 04:57:48,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-04-01 04:57:48,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2023-04-01 04:57:48,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:57:48,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2023-04-01 04:57:48,971 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 20 [2023-04-01 04:57:48,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:57:48,971 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2023-04-01 04:57:48,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:57:48,971 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2023-04-01 04:57:48,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-01 04:57:48,972 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:57:48,972 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:57:48,989 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 04:57:49,179 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 04:57:49,180 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:57:49,180 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:57:49,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1949881138, now seen corresponding path program 3 times [2023-04-01 04:57:49,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:57:49,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97720155] [2023-04-01 04:57:49,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:57:49,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:57:49,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:57:49,587 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-04-01 04:57:49,588 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:57:49,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97720155] [2023-04-01 04:57:49,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97720155] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:57:49,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057382520] [2023-04-01 04:57:49,588 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 04:57:49,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:57:49,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:57:49,589 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 04:57:49,591 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 04:57:49,680 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 04:57:49,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 04:57:49,682 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 45 conjunts are in the unsatisfiable core [2023-04-01 04:57:49,685 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:57:49,775 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:57:49,775 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:57:50,019 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-04-01 04:57:50,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057382520] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:57:50,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [102517386] [2023-04-01 04:57:50,021 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-04-01 04:57:50,021 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:57:50,022 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:57:50,022 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:57:50,022 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:57:50,061 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-04-01 04:57:50,163 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2023-04-01 04:57:50,170 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:57:50,515 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '774#(and (<= 1 |#StackHeapBarrier|) (= |main_#in~argv.offset| main_~argv.offset) (<= 102400 (mod main_~i~0 4294967296)) (<= main_~ND~0 127) (= |main_#in~argv.base| main_~argv.base) (= |~#array~0.offset| 0) (<= 0 main_~i~0) (= 4 |~#array~0.base|) (= |#NULL.offset| 0) (<= 0 (+ 128 main_~ND~0)) (= |main_#in~argc| main_~argc) (= |#NULL.base| 0))' at error location [2023-04-01 04:57:50,515 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:57:50,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:57:50,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-04-01 04:57:50,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835230847] [2023-04-01 04:57:50,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:57:50,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-01 04:57:50,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:57:50,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-01 04:57:50,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=780, Unknown=0, NotChecked=0, Total=992 [2023-04-01 04:57:50,518 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:57:55,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:57:55,055 INFO L93 Difference]: Finished difference Result 98 states and 123 transitions. [2023-04-01 04:57:55,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-01 04:57:55,055 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2023-04-01 04:57:55,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:57:55,056 INFO L225 Difference]: With dead ends: 98 [2023-04-01 04:57:55,056 INFO L226 Difference]: Without dead ends: 75 [2023-04-01 04:57:55,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=462, Invalid=1260, Unknown=0, NotChecked=0, Total=1722 [2023-04-01 04:57:55,059 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 14 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 04:57:55,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 49 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 04:57:55,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-04-01 04:57:55,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2023-04-01 04:57:55,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 71 states have (on average 1.028169014084507) internal successors, (73), 71 states have internal predecessors, (73), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:57:55,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2023-04-01 04:57:55,078 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 38 [2023-04-01 04:57:55,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:57:55,078 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2023-04-01 04:57:55,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:57:55,078 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2023-04-01 04:57:55,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-01 04:57:55,081 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:57:55,081 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:57:55,088 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 04:57:55,285 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 04:57:55,285 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:57:55,285 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:57:55,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1080961214, now seen corresponding path program 4 times [2023-04-01 04:57:55,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:57:55,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046800250] [2023-04-01 04:57:55,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:57:55,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:57:55,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:57:56,243 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2023-04-01 04:57:56,243 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:57:56,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046800250] [2023-04-01 04:57:56,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046800250] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:57:56,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928478879] [2023-04-01 04:57:56,244 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 04:57:56,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:57:56,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:57:56,245 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 04:57:56,247 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 04:57:56,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:57:56,576 INFO L262 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 93 conjunts are in the unsatisfiable core [2023-04-01 04:57:56,580 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:57:56,668 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2023-04-01 04:57:56,668 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:57:57,555 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2023-04-01 04:57:57,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928478879] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:57:57,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1411410054] [2023-04-01 04:57:57,557 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-04-01 04:57:57,557 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:57:57,557 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:57:57,557 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:57:57,557 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:57:57,586 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-04-01 04:57:57,662 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2023-04-01 04:57:57,669 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:57:58,128 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1585#(and (<= 1 |#StackHeapBarrier|) (= |main_#in~argv.offset| main_~argv.offset) (<= 102400 (mod main_~i~0 4294967296)) (<= main_~ND~0 127) (= |main_#in~argv.base| main_~argv.base) (= |~#array~0.offset| 0) (<= 0 main_~i~0) (= 4 |~#array~0.base|) (= |#NULL.offset| 0) (<= 0 (+ 128 main_~ND~0)) (= |main_#in~argc| main_~argc) (= |#NULL.base| 0))' at error location [2023-04-01 04:57:58,128 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:57:58,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:57:58,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2023-04-01 04:57:58,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708891685] [2023-04-01 04:57:58,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:57:58,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-04-01 04:57:58,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:57:58,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-04-01 04:57:58,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=692, Invalid=2388, Unknown=0, NotChecked=0, Total=3080 [2023-04-01 04:57:58,131 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)