/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/bitvector/interleave_bits.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 15:44:10,128 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 15:44:10,130 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 15:44:10,162 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 15:44:10,163 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 15:44:10,165 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 15:44:10,169 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 15:44:10,171 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 15:44:10,172 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 15:44:10,176 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 15:44:10,177 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 15:44:10,179 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 15:44:10,179 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 15:44:10,182 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 15:44:10,183 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 15:44:10,184 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 15:44:10,185 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 15:44:10,185 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 15:44:10,187 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 15:44:10,191 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 15:44:10,192 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 15:44:10,194 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 15:44:10,195 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 15:44:10,196 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 15:44:10,203 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 15:44:10,203 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 15:44:10,204 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 15:44:10,205 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 15:44:10,205 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 15:44:10,206 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 15:44:10,207 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 15:44:10,207 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 15:44:10,208 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 15:44:10,209 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 15:44:10,209 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 15:44:10,210 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 15:44:10,210 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 15:44:10,210 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 15:44:10,210 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 15:44:10,211 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 15:44:10,211 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 15:44:10,213 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-02 15:44:10,242 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 15:44:10,243 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 15:44:10,243 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 15:44:10,243 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 15:44:10,244 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 15:44:10,244 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 15:44:10,244 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 15:44:10,244 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 15:44:10,244 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 15:44:10,245 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 15:44:10,245 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 15:44:10,246 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 15:44:10,246 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 15:44:10,246 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 15:44:10,246 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 15:44:10,246 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 15:44:10,246 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 15:44:10,246 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 15:44:10,247 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 15:44:10,247 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 15:44:10,247 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 15:44:10,247 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 15:44:10,247 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 15:44:10,247 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 15:44:10,247 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 15:44:10,248 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 15:44:10,248 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 15:44:10,248 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 15:44:10,248 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 15:44:10,248 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 15:44:10,248 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 15:44:10,249 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 15:44:10,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 15:44:10,249 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 15:44:10,249 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 15:44:10,249 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 15:44:10,249 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 15:44:10,249 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 15:44:10,250 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 15:44:10,250 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 15:44:10,250 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 15:44:10,250 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 15:44:10,465 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 15:44:10,486 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 15:44:10,488 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 15:44:10,489 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 15:44:10,490 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 15:44:10,491 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/interleave_bits.i [2023-04-02 15:44:11,655 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 15:44:11,837 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 15:44:11,838 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/interleave_bits.i [2023-04-02 15:44:11,845 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcef7b70e/874a78a982f64fca9339a57f065a8601/FLAG8b0979141 [2023-04-02 15:44:11,856 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcef7b70e/874a78a982f64fca9339a57f065a8601 [2023-04-02 15:44:11,859 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 15:44:11,860 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 15:44:11,861 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 15:44:11,861 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 15:44:11,864 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 15:44:11,864 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 03:44:11" (1/1) ... [2023-04-02 15:44:11,865 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@544d277d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:44:11, skipping insertion in model container [2023-04-02 15:44:11,865 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 03:44:11" (1/1) ... [2023-04-02 15:44:11,870 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 15:44:11,884 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 15:44:11,992 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/bitvector/interleave_bits.i[1175,1188] [2023-04-02 15:44:12,011 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 15:44:12,019 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 15:44:12,029 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/bitvector/interleave_bits.i[1175,1188] [2023-04-02 15:44:12,043 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 15:44:12,057 INFO L208 MainTranslator]: Completed translation [2023-04-02 15:44:12,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:44:12 WrapperNode [2023-04-02 15:44:12,057 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 15:44:12,058 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 15:44:12,058 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 15:44:12,058 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 15:44:12,066 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:44:12" (1/1) ... [2023-04-02 15:44:12,066 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:44:12" (1/1) ... [2023-04-02 15:44:12,072 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:44:12" (1/1) ... [2023-04-02 15:44:12,072 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:44:12" (1/1) ... [2023-04-02 15:44:12,080 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:44:12" (1/1) ... [2023-04-02 15:44:12,085 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:44:12" (1/1) ... [2023-04-02 15:44:12,087 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:44:12" (1/1) ... [2023-04-02 15:44:12,088 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:44:12" (1/1) ... [2023-04-02 15:44:12,097 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 15:44:12,098 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 15:44:12,098 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 15:44:12,098 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 15:44:12,106 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:44:12" (1/1) ... [2023-04-02 15:44:12,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 15:44:12,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:44:12,142 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 15:44:12,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 15:44:12,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 15:44:12,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 15:44:12,172 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 15:44:12,175 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 15:44:12,176 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 15:44:12,176 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 15:44:12,176 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 15:44:12,176 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-02 15:44:12,176 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-02 15:44:12,176 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 15:44:12,176 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 15:44:12,177 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ushort [2023-04-02 15:44:12,177 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 15:44:12,177 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 15:44:12,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 15:44:12,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 15:44:12,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 15:44:12,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 15:44:12,177 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 15:44:12,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 15:44:12,249 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 15:44:12,252 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 15:44:12,812 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 15:44:13,227 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 15:44:13,228 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 15:44:13,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 03:44:13 BoogieIcfgContainer [2023-04-02 15:44:13,232 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 15:44:13,234 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 15:44:13,235 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 15:44:13,238 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 15:44:13,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 03:44:11" (1/3) ... [2023-04-02 15:44:13,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f9b3f60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 03:44:13, skipping insertion in model container [2023-04-02 15:44:13,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:44:12" (2/3) ... [2023-04-02 15:44:13,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f9b3f60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 03:44:13, skipping insertion in model container [2023-04-02 15:44:13,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 03:44:13" (3/3) ... [2023-04-02 15:44:13,240 INFO L112 eAbstractionObserver]: Analyzing ICFG interleave_bits.i [2023-04-02 15:44:13,255 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 15:44:13,255 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 15:44:13,300 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 15:44:13,308 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;@1f771b1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 15:44:13,308 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 15:44:13,313 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 15:44:13,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-04-02 15:44:13,319 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:44:13,319 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:44:13,320 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:44:13,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:44:13,327 INFO L85 PathProgramCache]: Analyzing trace with hash 2057740624, now seen corresponding path program 1 times [2023-04-02 15:44:13,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:44:13,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117493194] [2023-04-02 15:44:13,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:44:13,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:44:13,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:44:13,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 15:44:13,733 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:44:13,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117493194] [2023-04-02 15:44:13,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117493194] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:44:13,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 15:44:13,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 15:44:13,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119228768] [2023-04-02 15:44:13,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:44:13,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 15:44:13,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:44:13,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 15:44:13,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 15:44:13,764 INFO L87 Difference]: Start difference. First operand has 17 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 15:44:15,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-02 15:44:17,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-02 15:44:17,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:44:17,819 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2023-04-02 15:44:17,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 15:44:17,827 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 10 [2023-04-02 15:44:17,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:44:17,831 INFO L225 Difference]: With dead ends: 29 [2023-04-02 15:44:17,832 INFO L226 Difference]: Without dead ends: 12 [2023-04-02 15:44:17,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 15:44:17,836 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-04-02 15:44:17,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 2 Unknown, 0 Unchecked, 4.0s Time] [2023-04-02 15:44:17,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-04-02 15:44:17,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-04-02 15:44:17,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 15:44:17,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2023-04-02 15:44:17,859 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2023-04-02 15:44:17,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:44:17,859 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2023-04-02 15:44:17,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 15:44:17,860 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2023-04-02 15:44:17,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-02 15:44:17,860 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:44:17,860 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:44:17,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 15:44:17,861 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:44:17,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:44:17,873 INFO L85 PathProgramCache]: Analyzing trace with hash -364556910, now seen corresponding path program 1 times [2023-04-02 15:44:17,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:44:17,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559144801] [2023-04-02 15:44:17,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:44:17,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:44:17,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:44:18,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 15:44:18,073 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:44:18,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559144801] [2023-04-02 15:44:18,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559144801] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 15:44:18,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993696714] [2023-04-02 15:44:18,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:44:18,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:44:18,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:44:18,079 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:44:18,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 15:44:18,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:44:18,237 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 15:44:18,241 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:44:18,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 15:44:18,270 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:44:18,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 15:44:18,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993696714] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:44:18,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [254261671] [2023-04-02 15:44:18,337 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-04-02 15:44:18,337 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:44:18,342 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:44:18,346 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:44:18,347 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:44:18,426 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 15:44:21,101 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2023-04-02 15:44:21,144 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 15:44:21,148 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:44:21,322 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '152#(and (exists ((v_main_~xx~0_BEFORE_CALL_1 Int) (v_main_~z~0_BEFORE_CALL_1 Int) (v_main_~i~0_BEFORE_CALL_1 Int) (v_main_~zz~0_BEFORE_CALL_1 Int)) (and (or (and (<= 1 |#StackHeapBarrier|) (<= 1 (+ v_main_~i~0_BEFORE_CALL_1 |#StackHeapBarrier|)) (= v_main_~xx~0_BEFORE_CALL_1 v_main_~zz~0_BEFORE_CALL_1) (<= 0 v_main_~i~0_BEFORE_CALL_1) (= |#NULL.offset| 0) (= |#NULL.base| 0)) (and (<= 1 |#StackHeapBarrier|) (<= 1 (+ v_main_~i~0_BEFORE_CALL_1 |#StackHeapBarrier|)) (<= 0 v_main_~i~0_BEFORE_CALL_1) (= |#NULL.offset| 0) (= |#NULL.base| 0))) (not (= (mod v_main_~z~0_BEFORE_CALL_1 4294967296) (mod v_main_~zz~0_BEFORE_CALL_1 4294967296))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 15:44:21,322 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:44:21,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 15:44:21,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-02 15:44:21,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324635755] [2023-04-02 15:44:21,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 15:44:21,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 15:44:21,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:44:21,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 15:44:21,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-04-02 15:44:21,325 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 15:44:21,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:44:21,410 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2023-04-02 15:44:21,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 15:44:21,411 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 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 11 [2023-04-02 15:44:21,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:44:21,412 INFO L225 Difference]: With dead ends: 20 [2023-04-02 15:44:21,412 INFO L226 Difference]: Without dead ends: 15 [2023-04-02 15:44:21,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-04-02 15:44:21,414 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 15:44:21,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 15:44:21,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-04-02 15:44:21,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-04-02 15:44:21,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 15:44:21,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2023-04-02 15:44:21,418 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2023-04-02 15:44:21,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:44:21,418 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2023-04-02 15:44:21,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 15:44:21,418 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2023-04-02 15:44:21,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-02 15:44:21,419 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:44:21,419 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:44:21,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 15:44:21,619 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 [2023-04-02 15:44:21,620 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:44:21,620 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:44:21,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1022320176, now seen corresponding path program 2 times [2023-04-02 15:44:21,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:44:21,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238993847] [2023-04-02 15:44:21,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:44:21,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:44:21,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:44:22,007 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 15:44:22,007 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:44:22,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238993847] [2023-04-02 15:44:22,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238993847] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 15:44:22,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595755006] [2023-04-02 15:44:22,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 15:44:22,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:44:22,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:44:22,009 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:44:22,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process