/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/array-crafted/bAnd2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 08:53:52,186 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 08:53:52,187 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 08:53:52,213 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 08:53:52,214 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 08:53:52,214 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 08:53:52,215 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 08:53:52,216 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 08:53:52,217 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 08:53:52,218 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 08:53:52,219 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 08:53:52,219 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 08:53:52,220 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 08:53:52,220 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 08:53:52,226 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 08:53:52,228 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 08:53:52,229 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 08:53:52,232 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 08:53:52,235 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 08:53:52,237 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 08:53:52,241 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 08:53:52,243 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 08:53:52,243 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 08:53:52,244 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 08:53:52,245 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 08:53:52,246 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 08:53:52,246 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 08:53:52,246 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 08:53:52,246 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 08:53:52,247 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 08:53:52,247 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 08:53:52,247 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 08:53:52,248 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 08:53:52,248 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 08:53:52,249 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 08:53:52,249 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 08:53:52,249 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 08:53:52,249 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 08:53:52,250 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 08:53:52,250 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 08:53:52,250 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 08:53:52,251 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 08:53:52,268 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 08:53:52,268 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 08:53:52,268 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 08:53:52,269 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 08:53:52,269 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 08:53:52,269 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 08:53:52,269 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 08:53:52,269 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 08:53:52,270 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 08:53:52,270 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 08:53:52,270 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 08:53:52,270 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 08:53:52,270 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 08:53:52,270 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 08:53:52,270 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 08:53:52,270 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 08:53:52,271 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 08:53:52,271 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 08:53:52,271 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 08:53:52,271 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 08:53:52,271 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 08:53:52,271 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 08:53:52,272 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 08:53:52,272 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 08:53:52,272 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 08:53:52,272 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 08:53:52,272 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 08:53:52,272 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 08:53:52,272 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 08:53:52,272 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 08:53:52,272 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 08:53:52,273 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 08:53:52,273 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 08:53:52,273 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 08:53:52,273 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 08:53:52,273 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 08:53:52,273 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 08:53:52,273 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 08:53:52,274 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 08:53:52,274 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 08:53:52,274 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 08:53:52,274 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 08:53:52,461 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 08:53:52,475 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 08:53:52,477 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 08:53:52,478 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 08:53:52,479 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 08:53:52,479 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/bAnd2.i [2023-04-01 08:53:53,419 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 08:53:53,576 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 08:53:53,577 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/bAnd2.i [2023-04-01 08:53:53,586 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1299632a/b995fd4c9d604e929cc78372965e3d19/FLAG3c29e3229 [2023-04-01 08:53:53,600 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1299632a/b995fd4c9d604e929cc78372965e3d19 [2023-04-01 08:53:53,602 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 08:53:53,603 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 08:53:53,606 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 08:53:53,606 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 08:53:53,608 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 08:53:53,608 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:53:53" (1/1) ... [2023-04-01 08:53:53,609 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10cb9fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:53:53, skipping insertion in model container [2023-04-01 08:53:53,609 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:53:53" (1/1) ... [2023-04-01 08:53:53,614 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 08:53:53,629 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 08:53:53,756 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/bAnd2.i[1296,1309] [2023-04-01 08:53:53,759 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 08:53:53,770 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 08:53:53,791 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/bAnd2.i[1296,1309] [2023-04-01 08:53:53,792 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 08:53:53,803 INFO L208 MainTranslator]: Completed translation [2023-04-01 08:53:53,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:53:53 WrapperNode [2023-04-01 08:53:53,804 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 08:53:53,805 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 08:53:53,805 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 08:53:53,805 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 08:53:53,812 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:53:53" (1/1) ... [2023-04-01 08:53:53,813 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:53:53" (1/1) ... [2023-04-01 08:53:53,825 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:53:53" (1/1) ... [2023-04-01 08:53:53,825 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:53:53" (1/1) ... [2023-04-01 08:53:53,844 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:53:53" (1/1) ... [2023-04-01 08:53:53,846 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:53:53" (1/1) ... [2023-04-01 08:53:53,847 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:53:53" (1/1) ... [2023-04-01 08:53:53,848 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:53:53" (1/1) ... [2023-04-01 08:53:53,849 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 08:53:53,850 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 08:53:53,850 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 08:53:53,850 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 08:53:53,850 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:53:53" (1/1) ... [2023-04-01 08:53:53,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 08:53:53,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:53:53,873 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 08:53:53,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 08:53:53,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 08:53:53,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 08:53:53,905 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 08:53:53,905 INFO L138 BoogieDeclarations]: Found implementation of procedure bAnd [2023-04-01 08:53:53,905 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 08:53:53,905 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 08:53:53,905 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 08:53:53,905 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 08:53:53,905 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 08:53:53,905 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 08:53:53,905 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 08:53:53,906 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 08:53:53,906 INFO L130 BoogieDeclarations]: Found specification of procedure bAnd [2023-04-01 08:53:53,906 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 08:53:53,906 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 08:53:53,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 08:53:53,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 08:53:53,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 08:53:53,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 08:53:53,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 08:53:53,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 08:53:53,978 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 08:53:53,980 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 08:53:54,185 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 08:53:54,231 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 08:53:54,231 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 08:53:54,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:53:54 BoogieIcfgContainer [2023-04-01 08:53:54,233 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 08:53:54,234 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 08:53:54,234 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 08:53:54,236 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 08:53:54,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 08:53:53" (1/3) ... [2023-04-01 08:53:54,236 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13cd89ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:53:54, skipping insertion in model container [2023-04-01 08:53:54,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:53:53" (2/3) ... [2023-04-01 08:53:54,237 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13cd89ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:53:54, skipping insertion in model container [2023-04-01 08:53:54,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:53:54" (3/3) ... [2023-04-01 08:53:54,237 INFO L112 eAbstractionObserver]: Analyzing ICFG bAnd2.i [2023-04-01 08:53:54,248 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 08:53:54,249 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 08:53:54,280 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 08:53:54,284 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;@7f3f95bc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 08:53:54,285 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 08:53:54,287 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 08:53:54,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-01 08:53:54,292 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:53:54,292 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:53:54,293 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:53:54,296 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:53:54,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1394842051, now seen corresponding path program 1 times [2023-04-01 08:53:54,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:53:54,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729701813] [2023-04-01 08:53:54,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:53:54,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:53:54,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:53:54,524 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 08:53:54,524 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:53:54,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729701813] [2023-04-01 08:53:54,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729701813] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 08:53:54,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 08:53:54,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 08:53:54,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343155783] [2023-04-01 08:53:54,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 08:53:54,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 08:53:54,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:53:54,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 08:53:54,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 08:53:54,549 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 08:53:54,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:53:54,607 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2023-04-01 08:53:54,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 08:53:54,609 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 24 [2023-04-01 08:53:54,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:53:54,613 INFO L225 Difference]: With dead ends: 41 [2023-04-01 08:53:54,613 INFO L226 Difference]: Without dead ends: 20 [2023-04-01 08:53:54,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 08:53:54,617 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:53:54,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:53:54,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-04-01 08:53:54,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-04-01 08:53:54,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:53:54,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2023-04-01 08:53:54,644 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 24 [2023-04-01 08:53:54,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:53:54,645 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2023-04-01 08:53:54,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 08:53:54,645 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2023-04-01 08:53:54,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 08:53:54,646 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:53:54,646 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:53:54,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 08:53:54,647 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:53:54,648 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:53:54,648 INFO L85 PathProgramCache]: Analyzing trace with hash -2104731495, now seen corresponding path program 1 times [2023-04-01 08:53:54,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:53:54,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62256034] [2023-04-01 08:53:54,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:53:54,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:53:54,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:53:54,760 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 08:53:54,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:53:54,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62256034] [2023-04-01 08:53:54,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62256034] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:53:54,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912318224] [2023-04-01 08:53:54,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:53:54,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:53:54,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:53:54,763 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:53:54,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 08:53:54,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:53:54,858 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 08:53:54,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:53:54,876 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 08:53:54,876 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 08:53:54,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912318224] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 08:53:54,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 08:53:54,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-04-01 08:53:54,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501962086] [2023-04-01 08:53:54,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 08:53:54,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 08:53:54,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:53:54,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 08:53:54,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 08:53:54,878 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 08:53:54,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:53:54,903 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2023-04-01 08:53:54,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 08:53:54,903 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2023-04-01 08:53:54,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:53:54,904 INFO L225 Difference]: With dead ends: 33 [2023-04-01 08:53:54,904 INFO L226 Difference]: Without dead ends: 21 [2023-04-01 08:53:54,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 08:53:54,905 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:53:54,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:53:54,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-04-01 08:53:54,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-04-01 08:53:54,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:53:54,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-04-01 08:53:54,909 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2023-04-01 08:53:54,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:53:54,909 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-04-01 08:53:54,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 08:53:54,910 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-04-01 08:53:54,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-01 08:53:54,910 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:53:54,910 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:53:54,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 08:53:55,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:53:55,111 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:53:55,112 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:53:55,112 INFO L85 PathProgramCache]: Analyzing trace with hash 56768948, now seen corresponding path program 1 times [2023-04-01 08:53:55,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:53:55,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330363362] [2023-04-01 08:53:55,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:53:55,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:53:55,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:53:55,220 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 08:53:55,220 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:53:55,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330363362] [2023-04-01 08:53:55,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330363362] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:53:55,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102107845] [2023-04-01 08:53:55,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:53:55,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:53:55,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:53:55,230 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:53:55,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 08:53:55,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:53:55,317 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 08:53:55,319 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:53:55,327 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 08:53:55,328 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 08:53:55,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102107845] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 08:53:55,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 08:53:55,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-04-01 08:53:55,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516336959] [2023-04-01 08:53:55,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 08:53:55,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 08:53:55,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:53:55,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 08:53:55,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 08:53:55,330 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 08:53:55,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:53:55,345 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2023-04-01 08:53:55,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 08:53:55,345 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2023-04-01 08:53:55,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:53:55,347 INFO L225 Difference]: With dead ends: 31 [2023-04-01 08:53:55,347 INFO L226 Difference]: Without dead ends: 22 [2023-04-01 08:53:55,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 08:53:55,350 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:53:55,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:53:55,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-04-01 08:53:55,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-04-01 08:53:55,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:53:55,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-04-01 08:53:55,361 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 28 [2023-04-01 08:53:55,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:53:55,363 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-04-01 08:53:55,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 08:53:55,363 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-04-01 08:53:55,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 08:53:55,364 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:53:55,365 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:53:55,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 08:53:55,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-01 08:53:55,572 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:53:55,572 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:53:55,573 INFO L85 PathProgramCache]: Analyzing trace with hash -876765341, now seen corresponding path program 1 times [2023-04-01 08:53:55,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:53:55,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546176502] [2023-04-01 08:53:55,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:53:55,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:53:55,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:53:55,684 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 08:53:55,685 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:53:55,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546176502] [2023-04-01 08:53:55,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546176502] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:53:55,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319951163] [2023-04-01 08:53:55,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:53:55,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:53:55,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:53:55,691 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:53:55,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 08:53:55,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:53:55,773 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 08:53:55,779 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:53:55,813 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 08:53:55,813 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:53:55,856 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 08:53:55,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319951163] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:53:55,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1463281559] [2023-04-01 08:53:55,891 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 08:53:55,891 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:53:55,893 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:53:55,897 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:53:55,897 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:53:56,071 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 78 for LOIs [2023-04-01 08:53:57,749 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 22 for LOIs [2023-04-01 08:53:57,917 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:53:57,921 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:53:58,977 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '631#(and (= 98 (select (select |old(#memory_int)| 2) 0)) (= 46 (select (select |old(#memory_int)| 2) 5)) (= (select (select |old(#memory_int)| 2) 4) 50) (= (select |old(#valid)| 1) 1) (= (select (select |old(#memory_int)| 2) 6) 99) (<= main_~ret5~0 2147483647) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (= (select (select |old(#memory_int)| 2) 1) 65) (= (select |old(#valid)| |main_~#x~0.base|) 0) (or (not (= main_~ret~0 main_~ret2~0)) (not (= main_~ret~0 main_~ret5~0))) (= (select (select |old(#memory_int)| 2) 3) 100) (not (= |main_~#x~0.base| 0)) (not (= |main_~#x~0.base| |#StackHeapBarrier|)) (<= 0 (+ main_~ret5~0 2147483648)) (not (= |#StackHeapBarrier| 0)) (= (select (select |old(#memory_int)| 1) 0) 48) (= (select (select |old(#memory_int)| 2) 2) 110) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (= (select (select |old(#memory_int)| 2) 7) 0) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select |old(#valid)| 2) 1) (= (select |old(#length)| 2) 8) (= |#NULL.base| 0))' at error location [2023-04-01 08:53:58,977 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:53:58,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:53:58,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-01 08:53:58,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029931021] [2023-04-01 08:53:58,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:53:58,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 08:53:58,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:53:58,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 08:53:58,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2023-04-01 08:53:58,979 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 08:53:59,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:53:59,011 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2023-04-01 08:53:59,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 08:53:59,016 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 29 [2023-04-01 08:53:59,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:53:59,016 INFO L225 Difference]: With dead ends: 40 [2023-04-01 08:53:59,016 INFO L226 Difference]: Without dead ends: 25 [2023-04-01 08:53:59,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2023-04-01 08:53:59,017 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:53:59,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 61 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:53:59,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-04-01 08:53:59,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-04-01 08:53:59,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:53:59,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-04-01 08:53:59,020 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 29 [2023-04-01 08:53:59,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:53:59,021 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-04-01 08:53:59,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 08:53:59,021 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-04-01 08:53:59,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 08:53:59,021 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:53:59,021 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:53:59,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 08:53:59,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:53:59,222 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:53:59,222 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:53:59,223 INFO L85 PathProgramCache]: Analyzing trace with hash -566132467, now seen corresponding path program 2 times [2023-04-01 08:53:59,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:53:59,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706708961] [2023-04-01 08:53:59,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:53:59,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:53:59,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:53:59,304 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 08:53:59,304 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:53:59,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706708961] [2023-04-01 08:53:59,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706708961] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:53:59,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199617728] [2023-04-01 08:53:59,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 08:53:59,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:53:59,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:53:59,306 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:53:59,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 08:53:59,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 08:53:59,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:53:59,363 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 08:53:59,364 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:53:59,373 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 08:53:59,373 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:53:59,393 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 08:53:59,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199617728] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:53:59,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1816145677] [2023-04-01 08:53:59,395 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 08:53:59,396 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:53:59,396 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:53:59,396 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:53:59,396 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:53:59,440 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 78 for LOIs [2023-04-01 08:54:00,570 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 22 for LOIs [2023-04-01 08:54:00,736 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:54:00,740 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:54:01,749 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '947#(and (= 98 (select (select |old(#memory_int)| 2) 0)) (= 46 (select (select |old(#memory_int)| 2) 5)) (= (select (select |old(#memory_int)| 2) 4) 50) (= (select |old(#valid)| 1) 1) (= (select (select |old(#memory_int)| 2) 6) 99) (<= main_~ret5~0 2147483647) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (= (select (select |old(#memory_int)| 2) 1) 65) (= (select |old(#valid)| |main_~#x~0.base|) 0) (or (not (= main_~ret~0 main_~ret2~0)) (not (= main_~ret~0 main_~ret5~0))) (= (select (select |old(#memory_int)| 2) 3) 100) (not (= |main_~#x~0.base| 0)) (not (= |main_~#x~0.base| |#StackHeapBarrier|)) (<= 0 (+ main_~ret5~0 2147483648)) (not (= |#StackHeapBarrier| 0)) (= (select (select |old(#memory_int)| 1) 0) 48) (= (select (select |old(#memory_int)| 2) 2) 110) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (= (select (select |old(#memory_int)| 2) 7) 0) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select |old(#valid)| 2) 1) (= (select |old(#length)| 2) 8) (= |#NULL.base| 0))' at error location [2023-04-01 08:54:01,750 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:54:01,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:54:01,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-01 08:54:01,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078911845] [2023-04-01 08:54:01,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:54:01,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 08:54:01,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:54:01,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 08:54:01,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2023-04-01 08:54:01,751 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 08:54:01,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:54:01,779 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2023-04-01 08:54:01,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 08:54:01,779 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 32 [2023-04-01 08:54:01,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:54:01,780 INFO L225 Difference]: With dead ends: 42 [2023-04-01 08:54:01,780 INFO L226 Difference]: Without dead ends: 28 [2023-04-01 08:54:01,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2023-04-01 08:54:01,781 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:54:01,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:54:01,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-04-01 08:54:01,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-04-01 08:54:01,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:54:01,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2023-04-01 08:54:01,788 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 32 [2023-04-01 08:54:01,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:54:01,788 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2023-04-01 08:54:01,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 08:54:01,788 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2023-04-01 08:54:01,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 08:54:01,789 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:54:01,789 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:54:01,796 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-01 08:54:01,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:54:01,993 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:54:01,993 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:54:01,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1093951224, now seen corresponding path program 3 times [2023-04-01 08:54:01,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:54:01,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619240974] [2023-04-01 08:54:01,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:54:01,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:54:02,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:54:02,070 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-04-01 08:54:02,070 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:54:02,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619240974] [2023-04-01 08:54:02,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619240974] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:54:02,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431327756] [2023-04-01 08:54:02,071 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 08:54:02,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:54:02,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:54:02,079 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:54:02,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 08:54:02,156 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 08:54:02,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:54:02,157 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 08:54:02,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:54:02,215 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-04-01 08:54:02,215 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:54:02,266 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-04-01 08:54:02,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431327756] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:54:02,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [28458965] [2023-04-01 08:54:02,268 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 08:54:02,268 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:54:02,268 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:54:02,268 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:54:02,269 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:54:02,307 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 78 for LOIs [2023-04-01 08:54:03,284 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 22 for LOIs [2023-04-01 08:54:03,423 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:54:03,427 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:54:04,458 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1334#(and (= 98 (select (select |old(#memory_int)| 2) 0)) (= 46 (select (select |old(#memory_int)| 2) 5)) (= (select (select |old(#memory_int)| 2) 4) 50) (= (select |old(#valid)| 1) 1) (= (select (select |old(#memory_int)| 2) 6) 99) (<= main_~ret5~0 2147483647) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (= (select (select |old(#memory_int)| 2) 1) 65) (= (select |old(#valid)| |main_~#x~0.base|) 0) (or (not (= main_~ret~0 main_~ret2~0)) (not (= main_~ret~0 main_~ret5~0))) (= (select (select |old(#memory_int)| 2) 3) 100) (not (= |main_~#x~0.base| 0)) (not (= |main_~#x~0.base| |#StackHeapBarrier|)) (<= 0 (+ main_~ret5~0 2147483648)) (not (= |#StackHeapBarrier| 0)) (= (select (select |old(#memory_int)| 1) 0) 48) (= (select (select |old(#memory_int)| 2) 2) 110) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (= (select (select |old(#memory_int)| 2) 7) 0) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select |old(#valid)| 2) 1) (= (select |old(#length)| 2) 8) (= |#NULL.base| 0))' at error location [2023-04-01 08:54:04,458 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:54:04,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:54:04,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2023-04-01 08:54:04,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735223229] [2023-04-01 08:54:04,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:54:04,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 08:54:04,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:54:04,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 08:54:04,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2023-04-01 08:54:04,460 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-04-01 08:54:04,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:54:04,489 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2023-04-01 08:54:04,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 08:54:04,490 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 41 [2023-04-01 08:54:04,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:54:04,490 INFO L225 Difference]: With dead ends: 53 [2023-04-01 08:54:04,490 INFO L226 Difference]: Without dead ends: 35 [2023-04-01 08:54:04,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2023-04-01 08:54:04,491 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:54:04,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 61 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:54:04,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-04-01 08:54:04,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-04-01 08:54:04,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:54:04,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2023-04-01 08:54:04,494 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 41 [2023-04-01 08:54:04,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:54:04,495 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2023-04-01 08:54:04,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-04-01 08:54:04,495 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2023-04-01 08:54:04,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-01 08:54:04,495 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:54:04,495 INFO L195 NwaCegarLoop]: trace histogram [12, 10, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:54:04,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 08:54:04,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:54:04,703 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:54:04,704 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:54:04,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1976105629, now seen corresponding path program 4 times [2023-04-01 08:54:04,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:54:04,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051626421] [2023-04-01 08:54:04,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:54:04,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:54:04,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:54:04,974 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-04-01 08:54:04,974 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:54:04,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051626421] [2023-04-01 08:54:04,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051626421] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:54:04,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568879466] [2023-04-01 08:54:04,975 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 08:54:04,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:54:04,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:54:04,981 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:54:04,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 08:54:05,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:54:05,076 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 08:54:05,083 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:54:05,102 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-04-01 08:54:05,102 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:54:05,248 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-04-01 08:54:05,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568879466] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:54:05,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [173749220] [2023-04-01 08:54:05,249 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 08:54:05,249 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:54:05,249 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:54:05,249 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:54:05,250 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:54:05,284 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 78 for LOIs [2023-04-01 08:54:06,265 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 22 for LOIs [2023-04-01 08:54:06,402 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:54:06,407 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:54:07,454 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1810#(and (= 98 (select (select |old(#memory_int)| 2) 0)) (= 46 (select (select |old(#memory_int)| 2) 5)) (= (select (select |old(#memory_int)| 2) 4) 50) (= (select |old(#valid)| 1) 1) (= (select (select |old(#memory_int)| 2) 6) 99) (<= main_~ret5~0 2147483647) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (= (select (select |old(#memory_int)| 2) 1) 65) (= (select |old(#valid)| |main_~#x~0.base|) 0) (or (not (= main_~ret~0 main_~ret2~0)) (not (= main_~ret~0 main_~ret5~0))) (= (select (select |old(#memory_int)| 2) 3) 100) (not (= |main_~#x~0.base| 0)) (not (= |main_~#x~0.base| |#StackHeapBarrier|)) (<= 0 (+ main_~ret5~0 2147483648)) (not (= |#StackHeapBarrier| 0)) (= (select (select |old(#memory_int)| 1) 0) 48) (= (select (select |old(#memory_int)| 2) 2) 110) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (= (select (select |old(#memory_int)| 2) 7) 0) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select |old(#valid)| 2) 1) (= (select |old(#length)| 2) 8) (= |#NULL.base| 0))' at error location [2023-04-01 08:54:07,454 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:54:07,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:54:07,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-04-01 08:54:07,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650061445] [2023-04-01 08:54:07,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:54:07,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-01 08:54:07,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:54:07,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-01 08:54:07,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=1069, Unknown=0, NotChecked=0, Total=1406 [2023-04-01 08:54:07,461 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 08:54:07,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:54:07,512 INFO L93 Difference]: Finished difference Result 66 states and 85 transitions. [2023-04-01 08:54:07,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-01 08:54:07,512 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 48 [2023-04-01 08:54:07,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:54:07,515 INFO L225 Difference]: With dead ends: 66 [2023-04-01 08:54:07,515 INFO L226 Difference]: Without dead ends: 47 [2023-04-01 08:54:07,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=337, Invalid=1069, Unknown=0, NotChecked=0, Total=1406 [2023-04-01 08:54:07,516 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:54:07,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 136 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:54:07,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-04-01 08:54:07,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-04-01 08:54:07,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:54:07,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2023-04-01 08:54:07,526 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 48 [2023-04-01 08:54:07,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:54:07,526 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2023-04-01 08:54:07,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 08:54:07,526 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2023-04-01 08:54:07,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-01 08:54:07,533 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:54:07,533 INFO L195 NwaCegarLoop]: trace histogram [22, 12, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:54:07,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 08:54:07,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:54:07,741 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:54:07,742 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:54:07,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1857902051, now seen corresponding path program 5 times [2023-04-01 08:54:07,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:54:07,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399457995] [2023-04-01 08:54:07,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:54:07,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:54:07,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:54:08,260 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-04-01 08:54:08,260 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:54:08,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399457995] [2023-04-01 08:54:08,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399457995] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:54:08,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107938399] [2023-04-01 08:54:08,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 08:54:08,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:54:08,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:54:08,261 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:54:08,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 08:54:08,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 08:54:08,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:54:08,348 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 08:54:08,351 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:54:08,404 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2023-04-01 08:54:08,405 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:54:08,502 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2023-04-01 08:54:08,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107938399] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:54:08,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [280159410] [2023-04-01 08:54:08,503 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 08:54:08,503 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:54:08,503 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:54:08,504 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:54:08,504 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:54:08,541 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 78 for LOIs [2023-04-01 08:54:09,481 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 22 for LOIs [2023-04-01 08:54:09,623 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:54:09,626 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:54:10,700 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2418#(and (= 98 (select (select |old(#memory_int)| 2) 0)) (= 46 (select (select |old(#memory_int)| 2) 5)) (= (select (select |old(#memory_int)| 2) 4) 50) (= (select |old(#valid)| 1) 1) (= (select (select |old(#memory_int)| 2) 6) 99) (<= main_~ret5~0 2147483647) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (= (select (select |old(#memory_int)| 2) 1) 65) (= (select |old(#valid)| |main_~#x~0.base|) 0) (or (not (= main_~ret~0 main_~ret2~0)) (not (= main_~ret~0 main_~ret5~0))) (= (select (select |old(#memory_int)| 2) 3) 100) (not (= |main_~#x~0.base| 0)) (not (= |main_~#x~0.base| |#StackHeapBarrier|)) (<= 0 (+ main_~ret5~0 2147483648)) (not (= |#StackHeapBarrier| 0)) (= (select (select |old(#memory_int)| 1) 0) 48) (= (select (select |old(#memory_int)| 2) 2) 110) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (= (select (select |old(#memory_int)| 2) 7) 0) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select |old(#valid)| 2) 1) (= (select |old(#length)| 2) 8) (= |#NULL.base| 0))' at error location [2023-04-01 08:54:10,700 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:54:10,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:54:10,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 7, 7] total 35 [2023-04-01 08:54:10,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710453207] [2023-04-01 08:54:10,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:54:10,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-04-01 08:54:10,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:54:10,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-04-01 08:54:10,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=1854, Unknown=0, NotChecked=0, Total=2256 [2023-04-01 08:54:10,702 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 35 states have internal predecessors, (54), 2 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 08:54:10,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:54:10,769 INFO L93 Difference]: Finished difference Result 73 states and 90 transitions. [2023-04-01 08:54:10,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-04-01 08:54:10,772 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 35 states have internal predecessors, (54), 2 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 60 [2023-04-01 08:54:10,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:54:10,774 INFO L225 Difference]: With dead ends: 73 [2023-04-01 08:54:10,774 INFO L226 Difference]: Without dead ends: 54 [2023-04-01 08:54:10,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=402, Invalid=1854, Unknown=0, NotChecked=0, Total=2256 [2023-04-01 08:54:10,775 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 08:54:10,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 91 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 08:54:10,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-04-01 08:54:10,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-04-01 08:54:10,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 46 states have (on average 1.065217391304348) internal successors, (49), 46 states have internal predecessors, (49), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:54:10,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2023-04-01 08:54:10,780 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 60 [2023-04-01 08:54:10,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:54:10,780 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2023-04-01 08:54:10,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 35 states have internal predecessors, (54), 2 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 08:54:10,780 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2023-04-01 08:54:10,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-04-01 08:54:10,781 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:54:10,781 INFO L195 NwaCegarLoop]: trace histogram [30, 23, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:54:10,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 08:54:10,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:54:10,982 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:54:10,982 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:54:10,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1917987815, now seen corresponding path program 6 times [2023-04-01 08:54:10,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:54:10,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130633854] [2023-04-01 08:54:10,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:54:10,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:54:11,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:54:11,674 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-04-01 08:54:11,675 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:54:11,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130633854] [2023-04-01 08:54:11,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130633854] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:54:11,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922094475] [2023-04-01 08:54:11,675 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 08:54:11,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:54:11,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:54:11,676 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:54:11,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 08:54:11,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 08:54:11,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:54:11,816 INFO L262 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 25 conjunts are in the unsatisfiable core [2023-04-01 08:54:11,819 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:54:11,849 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-04-01 08:54:11,849 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:54:12,424 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-04-01 08:54:12,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922094475] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:54:12,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [916537146] [2023-04-01 08:54:12,428 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 08:54:12,428 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:54:12,428 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:54:12,428 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:54:12,428 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:54:12,458 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 78 for LOIs [2023-04-01 08:54:13,379 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 22 for LOIs [2023-04-01 08:54:13,507 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:54:13,517 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:54:14,575 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3184#(and (= 98 (select (select |old(#memory_int)| 2) 0)) (= 46 (select (select |old(#memory_int)| 2) 5)) (= (select (select |old(#memory_int)| 2) 4) 50) (= (select |old(#valid)| 1) 1) (= (select (select |old(#memory_int)| 2) 6) 99) (<= main_~ret5~0 2147483647) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (= (select (select |old(#memory_int)| 2) 1) 65) (= (select |old(#valid)| |main_~#x~0.base|) 0) (or (not (= main_~ret~0 main_~ret2~0)) (not (= main_~ret~0 main_~ret5~0))) (= (select (select |old(#memory_int)| 2) 3) 100) (not (= |main_~#x~0.base| 0)) (not (= |main_~#x~0.base| |#StackHeapBarrier|)) (<= 0 (+ main_~ret5~0 2147483648)) (not (= |#StackHeapBarrier| 0)) (= (select (select |old(#memory_int)| 1) 0) 48) (= (select (select |old(#memory_int)| 2) 2) 110) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (= (select (select |old(#memory_int)| 2) 7) 0) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select |old(#valid)| 2) 1) (= (select |old(#length)| 2) 8) (= |#NULL.base| 0))' at error location [2023-04-01 08:54:14,575 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:54:14,575 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:54:14,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2023-04-01 08:54:14,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102401899] [2023-04-01 08:54:14,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:54:14,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-04-01 08:54:14,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:54:14,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-04-01 08:54:14,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1312, Invalid=2720, Unknown=0, NotChecked=0, Total=4032 [2023-04-01 08:54:14,578 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 51 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 51 states have internal predecessors, (66), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 08:54:14,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:54:14,650 INFO L93 Difference]: Finished difference Result 104 states and 136 transitions. [2023-04-01 08:54:14,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-04-01 08:54:14,650 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 51 states have internal predecessors, (66), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 79 [2023-04-01 08:54:14,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:54:14,652 INFO L225 Difference]: With dead ends: 104 [2023-04-01 08:54:14,652 INFO L226 Difference]: Without dead ends: 79 [2023-04-01 08:54:14,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1060 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1312, Invalid=2720, Unknown=0, NotChecked=0, Total=4032 [2023-04-01 08:54:14,655 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 08:54:14,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 106 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 08:54:14,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-04-01 08:54:14,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2023-04-01 08:54:14,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 71 states have internal predecessors, (74), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:54:14,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2023-04-01 08:54:14,672 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 79 [2023-04-01 08:54:14,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:54:14,672 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2023-04-01 08:54:14,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 51 states have internal predecessors, (66), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 08:54:14,673 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2023-04-01 08:54:14,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-04-01 08:54:14,674 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:54:14,674 INFO L195 NwaCegarLoop]: trace histogram [48, 30, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:54:14,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 08:54:14,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-04-01 08:54:14,877 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:54:14,877 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:54:14,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1644461443, now seen corresponding path program 7 times [2023-04-01 08:54:14,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:54:14,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341982934] [2023-04-01 08:54:14,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:54:14,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:54:14,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:54:16,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-04-01 08:54:16,588 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:54:16,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341982934] [2023-04-01 08:54:16,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341982934] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:54:16,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471692164] [2023-04-01 08:54:16,589 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 08:54:16,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:54:16,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:54:16,590 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:54:16,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 08:54:16,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:54:16,763 INFO L262 TraceCheckSpWp]: Trace formula consists of 723 conjuncts, 50 conjunts are in the unsatisfiable core [2023-04-01 08:54:16,766 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:54:16,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-04-01 08:54:16,824 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:54:19,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-04-01 08:54:19,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471692164] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:54:19,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1461089258] [2023-04-01 08:54:19,005 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 08:54:19,005 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:54:19,005 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:54:19,005 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:54:19,005 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:54:19,039 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 78 for LOIs [2023-04-01 08:54:19,962 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 22 for LOIs [2023-04-01 08:54:20,092 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:54:20,095 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:54:21,440 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4262#(and (= 98 (select (select |old(#memory_int)| 2) 0)) (= 46 (select (select |old(#memory_int)| 2) 5)) (= (select (select |old(#memory_int)| 2) 4) 50) (= (select |old(#valid)| 1) 1) (= (select (select |old(#memory_int)| 2) 6) 99) (<= main_~ret5~0 2147483647) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (= (select (select |old(#memory_int)| 2) 1) 65) (= (select |old(#valid)| |main_~#x~0.base|) 0) (or (not (= main_~ret~0 main_~ret2~0)) (not (= main_~ret~0 main_~ret5~0))) (= (select (select |old(#memory_int)| 2) 3) 100) (not (= |main_~#x~0.base| 0)) (not (= |main_~#x~0.base| |#StackHeapBarrier|)) (<= 0 (+ main_~ret5~0 2147483648)) (not (= |#StackHeapBarrier| 0)) (= (select (select |old(#memory_int)| 1) 0) 48) (= (select (select |old(#memory_int)| 2) 2) 110) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (= (select (select |old(#memory_int)| 2) 7) 0) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select |old(#valid)| 2) 1) (= (select |old(#length)| 2) 8) (= |#NULL.base| 0))' at error location [2023-04-01 08:54:21,440 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:54:21,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:54:21,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 101 [2023-04-01 08:54:21,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567316176] [2023-04-01 08:54:21,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:54:21,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2023-04-01 08:54:21,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:54:21,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2023-04-01 08:54:21,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5087, Invalid=7795, Unknown=0, NotChecked=0, Total=12882 [2023-04-01 08:54:21,444 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand has 101 states, 101 states have (on average 1.1485148514851484) internal successors, (116), 101 states have internal predecessors, (116), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 08:54:21,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:54:21,557 INFO L93 Difference]: Finished difference Result 154 states and 211 transitions. [2023-04-01 08:54:21,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-04-01 08:54:21,558 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.1485148514851484) internal successors, (116), 101 states have internal predecessors, (116), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 104 [2023-04-01 08:54:21,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:54:21,558 INFO L225 Difference]: With dead ends: 154 [2023-04-01 08:54:21,558 INFO L226 Difference]: Without dead ends: 129 [2023-04-01 08:54:21,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2135 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5087, Invalid=7795, Unknown=0, NotChecked=0, Total=12882 [2023-04-01 08:54:21,561 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 08:54:21,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 91 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 08:54:21,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-04-01 08:54:21,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2023-04-01 08:54:21,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 121 states have (on average 1.024793388429752) internal successors, (124), 121 states have internal predecessors, (124), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:54:21,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 133 transitions. [2023-04-01 08:54:21,576 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 133 transitions. Word has length 104 [2023-04-01 08:54:21,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:54:21,576 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 133 transitions. [2023-04-01 08:54:21,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.1485148514851484) internal successors, (116), 101 states have internal predecessors, (116), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 08:54:21,576 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 133 transitions. [2023-04-01 08:54:21,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2023-04-01 08:54:21,577 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:54:21,577 INFO L195 NwaCegarLoop]: trace histogram [98, 30, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:54:21,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 08:54:21,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 08:54:21,784 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:54:21,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:54:21,785 INFO L85 PathProgramCache]: Analyzing trace with hash -681633213, now seen corresponding path program 8 times [2023-04-01 08:54:21,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:54:21,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429056598] [2023-04-01 08:54:21,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:54:21,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:54:21,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:54:26,934 INFO L134 CoverageAnalysis]: Checked inductivity of 5388 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-04-01 08:54:26,934 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:54:26,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429056598] [2023-04-01 08:54:26,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429056598] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:54:26,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010065040] [2023-04-01 08:54:26,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 08:54:26,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:54:26,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:54:26,935 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:54:26,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 08:54:27,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 08:54:27,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:54:27,115 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 08:54:27,119 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:54:27,216 INFO L134 CoverageAnalysis]: Checked inductivity of 5388 backedges. 246 proven. 3 refuted. 0 times theorem prover too weak. 5139 trivial. 0 not checked. [2023-04-01 08:54:27,216 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:54:27,334 INFO L134 CoverageAnalysis]: Checked inductivity of 5388 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5385 trivial. 0 not checked. [2023-04-01 08:54:27,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010065040] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:54:27,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [527241916] [2023-04-01 08:54:27,335 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 08:54:27,335 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:54:27,335 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:54:27,336 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:54:27,336 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:54:27,366 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 78 for LOIs [2023-04-01 08:54:28,287 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 22 for LOIs [2023-04-01 08:54:28,427 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:54:28,430 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:54:30,139 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5846#(and (= 98 (select (select |old(#memory_int)| 2) 0)) (= 46 (select (select |old(#memory_int)| 2) 5)) (= (select (select |old(#memory_int)| 2) 4) 50) (= (select |old(#valid)| 1) 1) (= (select (select |old(#memory_int)| 2) 6) 99) (<= main_~ret5~0 2147483647) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (= (select (select |old(#memory_int)| 2) 1) 65) (= (select |old(#valid)| |main_~#x~0.base|) 0) (or (not (= main_~ret~0 main_~ret2~0)) (not (= main_~ret~0 main_~ret5~0))) (= (select (select |old(#memory_int)| 2) 3) 100) (not (= |main_~#x~0.base| 0)) (not (= |main_~#x~0.base| |#StackHeapBarrier|)) (<= 0 (+ main_~ret5~0 2147483648)) (not (= |#StackHeapBarrier| 0)) (= (select (select |old(#memory_int)| 1) 0) 48) (= (select (select |old(#memory_int)| 2) 2) 110) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (= (select (select |old(#memory_int)| 2) 7) 0) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select |old(#valid)| 2) 1) (= (select |old(#length)| 2) 8) (= |#NULL.base| 0))' at error location [2023-04-01 08:54:30,139 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:54:30,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:54:30,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 5, 5] total 107 [2023-04-01 08:54:30,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854724451] [2023-04-01 08:54:30,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:54:30,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2023-04-01 08:54:30,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:54:30,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2023-04-01 08:54:30,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5114, Invalid=9166, Unknown=0, NotChecked=0, Total=14280 [2023-04-01 08:54:30,144 INFO L87 Difference]: Start difference. First operand 129 states and 133 transitions. Second operand has 107 states, 107 states have (on average 1.1775700934579438) internal successors, (126), 107 states have internal predecessors, (126), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 08:54:30,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:54:30,264 INFO L93 Difference]: Finished difference Result 159 states and 171 transitions. [2023-04-01 08:54:30,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2023-04-01 08:54:30,265 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.1775700934579438) internal successors, (126), 107 states have internal predecessors, (126), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 154 [2023-04-01 08:54:30,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:54:30,266 INFO L225 Difference]: With dead ends: 159 [2023-04-01 08:54:30,266 INFO L226 Difference]: Without dead ends: 134 [2023-04-01 08:54:30,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 562 GetRequests, 444 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1985 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=5114, Invalid=9166, Unknown=0, NotChecked=0, Total=14280 [2023-04-01 08:54:30,268 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 08:54:30,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 151 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 08:54:30,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-04-01 08:54:30,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2023-04-01 08:54:30,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 126 states have (on average 1.0238095238095237) internal successors, (129), 126 states have internal predecessors, (129), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:54:30,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 138 transitions. [2023-04-01 08:54:30,273 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 138 transitions. Word has length 154 [2023-04-01 08:54:30,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:54:30,274 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 138 transitions. [2023-04-01 08:54:30,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.1775700934579438) internal successors, (126), 107 states have internal predecessors, (126), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 08:54:30,274 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 138 transitions. [2023-04-01 08:54:30,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2023-04-01 08:54:30,275 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:54:30,275 INFO L195 NwaCegarLoop]: trace histogram [99, 30, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:54:30,284 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-04-01 08:54:30,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-01 08:54:30,481 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:54:30,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:54:30,481 INFO L85 PathProgramCache]: Analyzing trace with hash 294533593, now seen corresponding path program 9 times [2023-04-01 08:54:30,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:54:30,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297908111] [2023-04-01 08:54:30,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:54:30,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:54:30,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:54:35,462 INFO L134 CoverageAnalysis]: Checked inductivity of 5505 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2023-04-01 08:54:35,462 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:54:35,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297908111] [2023-04-01 08:54:35,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297908111] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:54:35,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684055649] [2023-04-01 08:54:35,463 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 08:54:35,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:54:35,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:54:35,464 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:54:35,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 08:54:35,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 08:54:35,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:54:35,758 INFO L262 TraceCheckSpWp]: Trace formula consists of 1210 conjuncts, 101 conjunts are in the unsatisfiable core [2023-04-01 08:54:35,761 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:54:35,888 INFO L134 CoverageAnalysis]: Checked inductivity of 5505 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2023-04-01 08:54:35,888 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:54:44,648 INFO L134 CoverageAnalysis]: Checked inductivity of 5505 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2023-04-01 08:54:44,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684055649] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:54:44,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [314466871] [2023-04-01 08:54:44,653 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 08:54:44,654 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:54:44,654 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:54:44,654 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:54:44,654 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:54:44,682 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 78 for LOIs [2023-04-01 08:54:45,617 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 22 for LOIs [2023-04-01 08:54:45,743 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:54:45,750 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:54:47,474 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7576#(and (= 98 (select (select |old(#memory_int)| 2) 0)) (= 46 (select (select |old(#memory_int)| 2) 5)) (= (select (select |old(#memory_int)| 2) 4) 50) (= (select |old(#valid)| 1) 1) (= (select (select |old(#memory_int)| 2) 6) 99) (<= main_~ret5~0 2147483647) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (= (select (select |old(#memory_int)| 2) 1) 65) (= (select |old(#valid)| |main_~#x~0.base|) 0) (or (not (= main_~ret~0 main_~ret2~0)) (not (= main_~ret~0 main_~ret5~0))) (= (select (select |old(#memory_int)| 2) 3) 100) (not (= |main_~#x~0.base| 0)) (not (= |main_~#x~0.base| |#StackHeapBarrier|)) (<= 0 (+ main_~ret5~0 2147483648)) (not (= |#StackHeapBarrier| 0)) (= (select (select |old(#memory_int)| 1) 0) 48) (= (select (select |old(#memory_int)| 2) 2) 110) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (= (select (select |old(#memory_int)| 2) 7) 0) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select |old(#valid)| 2) 1) (= (select |old(#length)| 2) 8) (= |#NULL.base| 0))' at error location [2023-04-01 08:54:47,474 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:54:47,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:54:47,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102, 102] total 203 [2023-04-01 08:54:47,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440731441] [2023-04-01 08:54:47,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:54:47,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2023-04-01 08:54:47,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:54:47,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2023-04-01 08:54:47,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20540, Invalid=25900, Unknown=0, NotChecked=0, Total=46440 [2023-04-01 08:54:47,483 INFO L87 Difference]: Start difference. First operand 134 states and 138 transitions. Second operand has 203 states, 203 states have (on average 1.0738916256157636) internal successors, (218), 203 states have internal predecessors, (218), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 08:54:47,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:54:47,766 INFO L93 Difference]: Finished difference Result 264 states and 372 transitions. [2023-04-01 08:54:47,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2023-04-01 08:54:47,766 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.0738916256157636) internal successors, (218), 203 states have internal predecessors, (218), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 159 [2023-04-01 08:54:47,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:54:47,768 INFO L225 Difference]: With dead ends: 264 [2023-04-01 08:54:47,768 INFO L226 Difference]: Without dead ends: 235 [2023-04-01 08:54:47,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4328 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=20540, Invalid=25900, Unknown=0, NotChecked=0, Total=46440 [2023-04-01 08:54:47,773 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 08:54:47,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 106 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 08:54:47,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2023-04-01 08:54:47,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2023-04-01 08:54:47,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 227 states have (on average 1.013215859030837) internal successors, (230), 227 states have internal predecessors, (230), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:54:47,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 239 transitions. [2023-04-01 08:54:47,780 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 239 transitions. Word has length 159 [2023-04-01 08:54:47,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:54:47,781 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 239 transitions. [2023-04-01 08:54:47,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.0738916256157636) internal successors, (218), 203 states have internal predecessors, (218), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 08:54:47,781 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 239 transitions. [2023-04-01 08:54:47,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2023-04-01 08:54:47,783 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:54:47,783 INFO L195 NwaCegarLoop]: trace histogram [200, 30, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:54:47,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-01 08:54:47,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-01 08:54:47,990 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:54:47,991 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:54:47,991 INFO L85 PathProgramCache]: Analyzing trace with hash 151037891, now seen corresponding path program 10 times [2023-04-01 08:54:47,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:54:47,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703040786] [2023-04-01 08:54:47,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:54:47,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:54:48,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat