/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/loops-crafted-1/iftelse.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 11:08:06,679 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 11:08:06,680 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 11:08:06,697 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 11:08:06,697 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 11:08:06,698 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 11:08:06,699 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 11:08:06,700 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 11:08:06,701 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 11:08:06,702 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 11:08:06,702 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 11:08:06,703 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 11:08:06,703 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 11:08:06,704 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 11:08:06,704 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 11:08:06,705 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 11:08:06,705 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 11:08:06,706 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 11:08:06,707 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 11:08:06,708 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 11:08:06,709 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 11:08:06,710 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 11:08:06,710 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 11:08:06,711 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 11:08:06,713 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 11:08:06,713 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 11:08:06,713 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 11:08:06,714 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 11:08:06,714 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 11:08:06,715 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 11:08:06,715 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 11:08:06,715 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 11:08:06,716 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 11:08:06,716 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 11:08:06,717 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 11:08:06,717 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 11:08:06,718 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 11:08:06,718 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 11:08:06,718 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 11:08:06,718 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 11:08:06,719 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 11:08:06,719 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 11:08:06,733 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 11:08:06,733 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 11:08:06,733 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 11:08:06,733 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 11:08:06,734 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 11:08:06,734 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 11:08:06,734 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 11:08:06,734 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 11:08:06,734 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 11:08:06,734 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 11:08:06,734 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 11:08:06,734 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 11:08:06,735 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 11:08:06,735 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 11:08:06,735 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 11:08:06,735 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 11:08:06,735 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 11:08:06,735 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 11:08:06,735 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 11:08:06,736 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 11:08:06,736 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 11:08:06,736 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 11:08:06,736 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 11:08:06,736 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 11:08:06,736 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 11:08:06,736 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 11:08:06,736 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 11:08:06,736 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 11:08:06,737 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 11:08:06,737 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 11:08:06,737 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 11:08:06,737 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 11:08:06,737 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:08:06,737 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 11:08:06,737 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 11:08:06,737 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 11:08:06,737 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 11:08:06,738 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 11:08:06,738 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 11:08:06,738 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 11:08:06,738 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 11:08:06,738 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 11:08:06,916 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 11:08:06,939 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 11:08:06,941 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 11:08:06,942 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 11:08:06,942 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 11:08:06,943 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/iftelse.c [2023-04-01 11:08:08,020 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 11:08:08,145 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 11:08:08,145 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/iftelse.c [2023-04-01 11:08:08,149 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/192c8b5e2/e79d9d56fbc546b4a5f4a571b812d4fc/FLAG90fec9c4d [2023-04-01 11:08:08,160 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/192c8b5e2/e79d9d56fbc546b4a5f4a571b812d4fc [2023-04-01 11:08:08,162 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 11:08:08,163 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 11:08:08,163 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 11:08:08,163 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 11:08:08,166 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 11:08:08,166 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:08:08" (1/1) ... [2023-04-01 11:08:08,167 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43984ab1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:08:08, skipping insertion in model container [2023-04-01 11:08:08,167 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:08:08" (1/1) ... [2023-04-01 11:08:08,171 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 11:08:08,179 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 11:08:08,262 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/iftelse.c[406,419] [2023-04-01 11:08:08,269 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:08:08,276 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 11:08:08,283 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/iftelse.c[406,419] [2023-04-01 11:08:08,300 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:08:08,309 INFO L208 MainTranslator]: Completed translation [2023-04-01 11:08:08,309 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:08:08 WrapperNode [2023-04-01 11:08:08,309 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 11:08:08,310 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 11:08:08,310 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 11:08:08,310 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 11:08:08,317 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:08:08" (1/1) ... [2023-04-01 11:08:08,317 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:08:08" (1/1) ... [2023-04-01 11:08:08,322 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:08:08" (1/1) ... [2023-04-01 11:08:08,322 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:08:08" (1/1) ... [2023-04-01 11:08:08,325 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:08:08" (1/1) ... [2023-04-01 11:08:08,327 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:08:08" (1/1) ... [2023-04-01 11:08:08,327 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:08:08" (1/1) ... [2023-04-01 11:08:08,328 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:08:08" (1/1) ... [2023-04-01 11:08:08,329 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 11:08:08,329 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 11:08:08,330 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 11:08:08,330 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 11:08:08,330 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:08:08" (1/1) ... [2023-04-01 11:08:08,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:08:08,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:08:08,349 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 11:08:08,356 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 11:08:08,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 11:08:08,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 11:08:08,379 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 11:08:08,379 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 11:08:08,380 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 11:08:08,380 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 11:08:08,380 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 11:08:08,380 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 11:08:08,380 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 11:08:08,380 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 11:08:08,380 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 11:08:08,380 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 11:08:08,380 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2023-04-01 11:08:08,380 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 11:08:08,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 11:08:08,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 11:08:08,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 11:08:08,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 11:08:08,381 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 11:08:08,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 11:08:08,437 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 11:08:08,438 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 11:08:08,546 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 11:08:08,584 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 11:08:08,584 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 11:08:08,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:08:08 BoogieIcfgContainer [2023-04-01 11:08:08,586 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 11:08:08,588 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 11:08:08,588 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 11:08:08,590 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 11:08:08,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 11:08:08" (1/3) ... [2023-04-01 11:08:08,590 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3281974f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:08:08, skipping insertion in model container [2023-04-01 11:08:08,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:08:08" (2/3) ... [2023-04-01 11:08:08,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3281974f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:08:08, skipping insertion in model container [2023-04-01 11:08:08,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:08:08" (3/3) ... [2023-04-01 11:08:08,592 INFO L112 eAbstractionObserver]: Analyzing ICFG iftelse.c [2023-04-01 11:08:08,603 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 11:08:08,603 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 11:08:08,633 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 11:08:08,638 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;@5c5288f8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 11:08:08,638 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 11:08:08,641 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 11:08:08,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-01 11:08:08,646 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:08:08,646 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:08:08,647 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:08:08,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:08:08,650 INFO L85 PathProgramCache]: Analyzing trace with hash 352206972, now seen corresponding path program 1 times [2023-04-01 11:08:08,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:08:08,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045509406] [2023-04-01 11:08:08,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:08:08,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:08:08,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:08:09,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:08:09,344 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:08:09,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045509406] [2023-04-01 11:08:09,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045509406] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:08:09,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:08:09,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 11:08:09,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790674292] [2023-04-01 11:08:09,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:08:09,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 11:08:09,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:08:09,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 11:08:09,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 11:08:09,387 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:08:09,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:08:09,466 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2023-04-01 11:08:09,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 11:08:09,468 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-04-01 11:08:09,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:08:09,472 INFO L225 Difference]: With dead ends: 44 [2023-04-01 11:08:09,472 INFO L226 Difference]: Without dead ends: 23 [2023-04-01 11:08:09,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-01 11:08:09,479 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:08:09,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 85 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:08:09,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-04-01 11:08:09,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2023-04-01 11:08:09,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 16 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 11:08:09,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2023-04-01 11:08:09,508 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 12 [2023-04-01 11:08:09,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:08:09,508 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2023-04-01 11:08:09,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:08:09,509 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2023-04-01 11:08:09,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-01 11:08:09,510 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:08:09,510 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:08:09,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 11:08:09,510 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:08:09,513 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:08:09,513 INFO L85 PathProgramCache]: Analyzing trace with hash -2134040423, now seen corresponding path program 1 times [2023-04-01 11:08:09,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:08:09,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446849505] [2023-04-01 11:08:09,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:08:09,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:08:09,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:08:09,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:08:09,559 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:08:09,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446849505] [2023-04-01 11:08:09,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446849505] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:08:09,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:08:09,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 11:08:09,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395099600] [2023-04-01 11:08:09,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:08:09,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 11:08:09,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:08:09,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 11:08:09,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 11:08:09,562 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:08:09,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:08:09,576 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2023-04-01 11:08:09,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 11:08:09,577 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-04-01 11:08:09,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:08:09,578 INFO L225 Difference]: With dead ends: 32 [2023-04-01 11:08:09,579 INFO L226 Difference]: Without dead ends: 22 [2023-04-01 11:08:09,582 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 11:08:09,584 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:08:09,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:08:09,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-04-01 11:08:09,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-04-01 11:08:09,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 11:08:09,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2023-04-01 11:08:09,600 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 14 [2023-04-01 11:08:09,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:08:09,600 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2023-04-01 11:08:09,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:08:09,600 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2023-04-01 11:08:09,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-01 11:08:09,600 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:08:09,601 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:08:09,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 11:08:09,601 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:08:09,601 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:08:09,601 INFO L85 PathProgramCache]: Analyzing trace with hash 615018288, now seen corresponding path program 1 times [2023-04-01 11:08:09,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:08:09,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359694480] [2023-04-01 11:08:09,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:08:09,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:08:09,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:08:10,041 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:08:10,041 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:08:10,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359694480] [2023-04-01 11:08:10,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359694480] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:08:10,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221467234] [2023-04-01 11:08:10,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:08:10,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:08:10,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:08:10,059 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 11:08:10,060 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 11:08:10,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:08:10,119 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2023-04-01 11:08:10,123 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:08:10,242 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:08:10,242 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:08:11,415 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:08:11,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221467234] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:08:11,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1354098289] [2023-04-01 11:08:11,446 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-01 11:08:11,446 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:08:11,448 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:08:11,451 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:08:11,451 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:08:11,522 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 46 for LOIs [2023-04-01 11:08:12,077 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 67 for LOIs [2023-04-01 11:08:12,113 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 11:08:12,117 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:08:12,852 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '330#(and (= (select |#length| 3) 12) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= (select |#valid| 1) 1) (= ~SIZE~0 20000001) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= 10 (select |#length| 2)) (= (select (select |#memory_int| 1) 1) 0) (= |#NULL.base| 0))' at error location [2023-04-01 11:08:12,852 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:08:12,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 11:08:12,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 18 [2023-04-01 11:08:12,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984952704] [2023-04-01 11:08:12,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 11:08:12,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-01 11:08:12,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:08:12,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-01 11:08:12,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2023-04-01 11:08:12,854 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 16 states have internal predecessors, (30), 7 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 11:08:15,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:08:15,634 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2023-04-01 11:08:15,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 11:08:15,649 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 16 states have internal predecessors, (30), 7 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 19 [2023-04-01 11:08:15,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:08:15,650 INFO L225 Difference]: With dead ends: 40 [2023-04-01 11:08:15,650 INFO L226 Difference]: Without dead ends: 38 [2023-04-01 11:08:15,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2023-04-01 11:08:15,651 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 17 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-01 11:08:15,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 73 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-01 11:08:15,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-04-01 11:08:15,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-04-01 11:08:15,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.04) internal successors, (26), 26 states have internal predecessors, (26), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-01 11:08:15,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2023-04-01 11:08:15,660 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 19 [2023-04-01 11:08:15,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:08:15,660 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2023-04-01 11:08:15,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 16 states have internal predecessors, (30), 7 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 11:08:15,660 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2023-04-01 11:08:15,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-01 11:08:15,661 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:08:15,661 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:08:15,668 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 11:08:15,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:08:15,862 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:08:15,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:08:15,862 INFO L85 PathProgramCache]: Analyzing trace with hash 196482096, now seen corresponding path program 2 times [2023-04-01 11:08:15,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:08:15,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150740536] [2023-04-01 11:08:15,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:08:15,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:08:15,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:08:16,588 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-04-01 11:08:16,588 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:08:16,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150740536] [2023-04-01 11:08:16,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150740536] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:08:16,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889538353] [2023-04-01 11:08:16,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 11:08:16,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:08:16,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:08:16,601 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 11:08:16,624 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 11:08:25,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-04-01 11:08:25,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 11:08:25,678 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 44 conjunts are in the unsatisfiable core [2023-04-01 11:08:25,680 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:08:26,102 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 26 proven. 47 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 11:08:26,102 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:08:35,349 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 26 proven. 47 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 11:08:35,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889538353] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:08:35,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1670897279] [2023-04-01 11:08:35,351 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-01 11:08:35,351 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:08:35,351 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:08:35,351 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:08:35,351 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:08:35,393 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 46 for LOIs [2023-04-01 11:08:35,741 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 67 for LOIs [2023-04-01 11:08:35,765 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 11:08:35,768 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:08:37,005 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '777#(and (= (select |#length| 3) 12) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= (select |#valid| 1) 1) (= ~SIZE~0 20000001) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= 10 (select |#length| 2)) (= (select (select |#memory_int| 1) 1) 0) (= |#NULL.base| 0))' at error location [2023-04-01 11:08:37,006 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:08:37,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 11:08:37,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 15] total 36 [2023-04-01 11:08:37,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228090020] [2023-04-01 11:08:37,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 11:08:37,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-04-01 11:08:37,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:08:37,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-04-01 11:08:37,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1670, Unknown=1, NotChecked=0, Total=1892 [2023-04-01 11:08:37,015 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 36 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 31 states have internal predecessors, (56), 20 states have call successors, (21), 4 states have call predecessors, (21), 3 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) [2023-04-01 11:08:46,866 WARN L223 SmtUtils]: Spent 6.17s on a formula simplification. DAG size of input: 82 DAG size of output: 71 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 11:08:59,204 WARN L223 SmtUtils]: Spent 5.85s on a formula simplification. DAG size of input: 64 DAG size of output: 44 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 11:09:01,838 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-01 11:09:10,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-01 11:09:20,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:09:20,774 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2023-04-01 11:09:20,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-01 11:09:20,774 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 31 states have internal predecessors, (56), 20 states have call successors, (21), 4 states have call predecessors, (21), 3 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) Word has length 47 [2023-04-01 11:09:20,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:09:20,776 INFO L225 Difference]: With dead ends: 65 [2023-04-01 11:09:20,776 INFO L226 Difference]: Without dead ends: 63 [2023-04-01 11:09:20,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 42.8s TimeCoverageRelationStatistics Valid=459, Invalid=3446, Unknown=1, NotChecked=0, Total=3906 [2023-04-01 11:09:20,777 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 57 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 62 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2023-04-01 11:09:20,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 80 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 454 Invalid, 2 Unknown, 0 Unchecked, 8.7s Time] [2023-04-01 11:09:20,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-04-01 11:09:20,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2023-04-01 11:09:20,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 43 states have internal predecessors, (43), 15 states have call successors, (15), 6 states have call predecessors, (15), 5 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 11:09:20,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2023-04-01 11:09:20,790 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 47 [2023-04-01 11:09:20,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:09:20,790 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2023-04-01 11:09:20,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 31 states have internal predecessors, (56), 20 states have call successors, (21), 4 states have call predecessors, (21), 3 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) [2023-04-01 11:09:20,791 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2023-04-01 11:09:20,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-04-01 11:09:20,792 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:09:20,792 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:09:20,797 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 11:09:20,997 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,SelfDestructingSolverStorable3 [2023-04-01 11:09:20,998 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:09:20,998 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:09:20,998 INFO L85 PathProgramCache]: Analyzing trace with hash 2083239548, now seen corresponding path program 3 times [2023-04-01 11:09:20,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:09:20,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960690892] [2023-04-01 11:09:20,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:09:20,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:09:21,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:09:21,914 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 16 proven. 108 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-04-01 11:09:21,914 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:09:21,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960690892] [2023-04-01 11:09:21,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960690892] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:09:21,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747790885] [2023-04-01 11:09:21,915 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 11:09:21,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:09:21,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:09:21,916 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 11:09:21,918 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 11:09:22,520 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 11:09:22,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 11:09:22,522 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 48 conjunts are in the unsatisfiable core [2023-04-01 11:09:22,525 INFO L285 TraceCheckSpWp]: Computing forward predicates...