/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 IntervalDomain -i ../sv-benchmarks/c/eca-rers2012/Problem18_label49.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:28:19,149 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:28:19,151 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:28:19,203 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:28:19,203 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:28:19,206 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:28:19,209 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:28:19,211 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:28:19,213 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:28:19,217 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:28:19,219 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:28:19,221 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:28:19,221 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:28:19,223 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:28:19,224 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:28:19,226 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:28:19,226 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:28:19,227 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:28:19,229 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:28:19,235 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:28:19,236 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:28:19,237 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:28:19,238 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:28:19,239 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:28:19,246 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 22:28:19,246 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 22:28:19,247 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 22:28:19,248 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 22:28:19,248 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 22:28:19,249 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 22:28:19,249 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:28:19,250 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:28:19,251 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:28:19,252 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:28:19,252 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:28:19,252 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:28:19,253 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:28:19,253 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:28:19,253 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:28:19,254 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:28:19,254 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:28:19,256 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 [2023-03-31 22:28:19,285 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:28:19,285 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:28:19,285 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:28:19,286 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:28:19,286 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:28:19,287 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:28:19,287 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:28:19,287 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:28:19,287 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:28:19,287 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:28:19,288 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:28:19,288 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:28:19,288 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:28:19,288 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:28:19,288 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:28:19,289 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:28:19,289 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:28:19,289 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:28:19,289 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:28:19,289 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:28:19,290 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:28:19,290 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:28:19,290 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:28:19,290 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:28:19,290 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:28:19,290 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:28:19,290 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:28:19,290 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:28:19,291 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:28:19,291 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:28:19,291 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:28:19,291 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:28:19,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:28:19,291 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:28:19,291 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:28:19,292 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:28:19,292 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:28:19,292 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:28:19,292 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:28:19,292 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:28:19,292 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:28:19,292 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:28:19,507 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:28:19,524 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:28:19,526 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:28:19,527 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:28:19,528 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:28:19,528 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem18_label49.c [2023-03-31 22:28:20,593 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:28:21,031 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:28:21,031 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label49.c [2023-03-31 22:28:21,054 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f133fc973/7edfc42f6884418581337a667a3b5830/FLAG5c0f716ea [2023-03-31 22:28:21,067 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f133fc973/7edfc42f6884418581337a667a3b5830 [2023-03-31 22:28:21,070 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:28:21,072 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:28:21,074 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:28:21,074 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:28:21,077 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:28:21,077 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:28:21" (1/1) ... [2023-03-31 22:28:21,079 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40530305 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:28:21, skipping insertion in model container [2023-03-31 22:28:21,079 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:28:21" (1/1) ... [2023-03-31 22:28:21,084 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:28:21,175 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:28:21,395 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/eca-rers2012/Problem18_label49.c[2595,2608] [2023-03-31 22:28:22,001 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:28:22,012 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:28:22,036 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/eca-rers2012/Problem18_label49.c[2595,2608] [2023-03-31 22:28:22,397 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:28:22,416 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:28:22,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:28:22 WrapperNode [2023-03-31 22:28:22,417 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:28:22,418 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:28:22,418 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:28:22,418 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:28:22,428 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:28:22" (1/1) ... [2023-03-31 22:28:22,428 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:28:22" (1/1) ... [2023-03-31 22:28:22,474 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:28:22" (1/1) ... [2023-03-31 22:28:22,475 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:28:22" (1/1) ... [2023-03-31 22:28:22,554 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:28:22" (1/1) ... [2023-03-31 22:28:22,574 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:28:22" (1/1) ... [2023-03-31 22:28:22,594 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:28:22" (1/1) ... [2023-03-31 22:28:22,603 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:28:22" (1/1) ... [2023-03-31 22:28:22,619 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:28:22,621 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:28:22,621 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:28:22,621 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:28:22,622 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:28:22" (1/1) ... [2023-03-31 22:28:22,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:28:22,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:28:22,655 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) [2023-03-31 22:28:22,658 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 [2023-03-31 22:28:22,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:28:22,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:28:22,692 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:28:22,692 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 22:28:22,692 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 22:28:22,692 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-31 22:28:22,692 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:28:22,692 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 22:28:22,692 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 22:28:22,692 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-31 22:28:22,692 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:28:22,692 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:28:22,692 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:28:22,693 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:28:22,693 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:28:22,693 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:28:22,693 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:28:22,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:28:22,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:28:22,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:28:22,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:28:22,693 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:28:22,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:28:22,757 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:28:22,758 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:28:25,550 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:28:32,255 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:28:32,255 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 22:28:32,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:28:32 BoogieIcfgContainer [2023-03-31 22:28:32,258 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:28:32,260 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:28:32,260 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:28:32,263 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:28:32,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:28:21" (1/3) ... [2023-03-31 22:28:32,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13e8fa1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:28:32, skipping insertion in model container [2023-03-31 22:28:32,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:28:22" (2/3) ... [2023-03-31 22:28:32,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13e8fa1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:28:32, skipping insertion in model container [2023-03-31 22:28:32,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:28:32" (3/3) ... [2023-03-31 22:28:32,265 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label49.c [2023-03-31 22:28:32,281 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:28:32,281 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:28:32,331 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:28:32,337 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;@4dd994e3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:28:32,337 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:28:32,343 INFO L276 IsEmpty]: Start isEmpty. Operand has 469 states, 457 states have (on average 1.9715536105032823) internal successors, (901), 458 states have internal predecessors, (901), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 22:28:32,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 22:28:32,349 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:28:32,349 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:28:32,350 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:28:32,354 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:28:32,354 INFO L85 PathProgramCache]: Analyzing trace with hash 314227203, now seen corresponding path program 1 times [2023-03-31 22:28:32,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:28:32,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794254332] [2023-03-31 22:28:32,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:28:32,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:28:32,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:28:32,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:28:32,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:28:32,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794254332] [2023-03-31 22:28:32,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794254332] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:28:32,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:28:32,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:28:32,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922191743] [2023-03-31 22:28:32,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:28:32,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:28:32,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:28:32,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:28:32,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:28:32,731 INFO L87 Difference]: Start difference. First operand has 469 states, 457 states have (on average 1.9715536105032823) internal successors, (901), 458 states have internal predecessors, (901), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 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 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2023-03-31 22:28:34,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:28:34,698 INFO L93 Difference]: Finished difference Result 1393 states and 2727 transitions. [2023-03-31 22:28:34,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:28:34,700 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-03-31 22:28:34,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:28:34,718 INFO L225 Difference]: With dead ends: 1393 [2023-03-31 22:28:34,718 INFO L226 Difference]: Without dead ends: 921 [2023-03-31 22:28:34,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:28:34,731 INFO L413 NwaCegarLoop]: 346 mSDtfsCounter, 472 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 1402 mSolverCounterSat, 373 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 1775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 373 IncrementalHoareTripleChecker+Valid, 1402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-03-31 22:28:34,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 366 Invalid, 1775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [373 Valid, 1402 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-03-31 22:28:34,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2023-03-31 22:28:34,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 919. [2023-03-31 22:28:34,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 905 states have (on average 1.6209944751381216) internal successors, (1467), 905 states have internal predecessors, (1467), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-03-31 22:28:34,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1484 transitions. [2023-03-31 22:28:34,823 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1484 transitions. Word has length 11 [2023-03-31 22:28:34,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:28:34,824 INFO L495 AbstractCegarLoop]: Abstraction has 919 states and 1484 transitions. [2023-03-31 22:28:34,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2023-03-31 22:28:34,824 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1484 transitions. [2023-03-31 22:28:34,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-03-31 22:28:34,825 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:28:34,825 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:28:34,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:28:34,826 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:28:34,827 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:28:34,827 INFO L85 PathProgramCache]: Analyzing trace with hash 529838646, now seen corresponding path program 1 times [2023-03-31 22:28:34,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:28:34,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244198059] [2023-03-31 22:28:34,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:28:34,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:28:34,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:28:34,975 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:28:34,976 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:28:34,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244198059] [2023-03-31 22:28:34,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244198059] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:28:34,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:28:34,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:28:34,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984501736] [2023-03-31 22:28:34,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:28:34,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:28:34,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:28:34,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:28:34,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:28:34,979 INFO L87 Difference]: Start difference. First operand 919 states and 1484 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:28:37,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:28:37,913 INFO L93 Difference]: Finished difference Result 2795 states and 4544 transitions. [2023-03-31 22:28:37,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:28:37,914 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2023-03-31 22:28:37,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:28:37,923 INFO L225 Difference]: With dead ends: 2795 [2023-03-31 22:28:37,923 INFO L226 Difference]: Without dead ends: 1881 [2023-03-31 22:28:37,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:28:37,927 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 1520 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 3161 mSolverCounterSat, 537 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1520 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 3698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 537 IncrementalHoareTripleChecker+Valid, 3161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-03-31 22:28:37,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1520 Valid, 94 Invalid, 3698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [537 Valid, 3161 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-03-31 22:28:37,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1881 states. [2023-03-31 22:28:37,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1881 to 1843. [2023-03-31 22:28:38,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1843 states, 1809 states have (on average 1.4145936981757876) internal successors, (2559), 1816 states have internal predecessors, (2559), 11 states have call successors, (11), 11 states have call predecessors, (11), 22 states have return successors, (54), 15 states have call predecessors, (54), 10 states have call successors, (54) [2023-03-31 22:28:38,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1843 states to 1843 states and 2624 transitions. [2023-03-31 22:28:38,008 INFO L78 Accepts]: Start accepts. Automaton has 1843 states and 2624 transitions. Word has length 22 [2023-03-31 22:28:38,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:28:38,009 INFO L495 AbstractCegarLoop]: Abstraction has 1843 states and 2624 transitions. [2023-03-31 22:28:38,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:28:38,009 INFO L276 IsEmpty]: Start isEmpty. Operand 1843 states and 2624 transitions. [2023-03-31 22:28:38,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-03-31 22:28:38,011 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:28:38,011 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:28:38,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 22:28:38,011 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:28:38,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:28:38,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1257204904, now seen corresponding path program 1 times [2023-03-31 22:28:38,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:28:38,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408343239] [2023-03-31 22:28:38,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:28:38,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:28:38,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:28:38,207 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 22:28:38,207 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:28:38,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408343239] [2023-03-31 22:28:38,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408343239] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:28:38,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683252602] [2023-03-31 22:28:38,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:28:38,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:28:38,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:28:38,217 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) [2023-03-31 22:28:38,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 22:28:38,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:28:38,321 INFO L262 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 22:28:38,326 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:28:38,434 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 22:28:38,434 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 22:28:38,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683252602] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:28:38,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 22:28:38,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-03-31 22:28:38,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049594178] [2023-03-31 22:28:38,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:28:38,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:28:38,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:28:38,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:28:38,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:28:38,436 INFO L87 Difference]: Start difference. First operand 1843 states and 2624 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 3 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) [2023-03-31 22:28:41,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:28:41,207 INFO L93 Difference]: Finished difference Result 5615 states and 8140 transitions. [2023-03-31 22:28:41,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:28:41,208 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 3 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) Word has length 32 [2023-03-31 22:28:41,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:28:41,224 INFO L225 Difference]: With dead ends: 5615 [2023-03-31 22:28:41,224 INFO L226 Difference]: Without dead ends: 3777 [2023-03-31 22:28:41,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-03-31 22:28:41,229 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 1572 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 2436 mSolverCounterSat, 1024 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1572 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 3460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1024 IncrementalHoareTripleChecker+Valid, 2436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-03-31 22:28:41,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1572 Valid, 59 Invalid, 3460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1024 Valid, 2436 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-03-31 22:28:41,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3777 states. [2023-03-31 22:28:41,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3777 to 3658. [2023-03-31 22:28:41,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3658 states, 3573 states have (on average 1.2549678141617688) internal successors, (4484), 3601 states have internal predecessors, (4484), 19 states have call successors, (19), 19 states have call predecessors, (19), 65 states have return successors, (195), 37 states have call predecessors, (195), 18 states have call successors, (195) [2023-03-31 22:28:41,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3658 states to 3658 states and 4698 transitions. [2023-03-31 22:28:41,323 INFO L78 Accepts]: Start accepts. Automaton has 3658 states and 4698 transitions. Word has length 32 [2023-03-31 22:28:41,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:28:41,324 INFO L495 AbstractCegarLoop]: Abstraction has 3658 states and 4698 transitions. [2023-03-31 22:28:41,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 3 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) [2023-03-31 22:28:41,324 INFO L276 IsEmpty]: Start isEmpty. Operand 3658 states and 4698 transitions. [2023-03-31 22:28:41,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-03-31 22:28:41,333 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:28:41,333 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:28:41,343 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-31 22:28:41,540 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 [2023-03-31 22:28:41,540 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:28:41,540 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:28:41,541 INFO L85 PathProgramCache]: Analyzing trace with hash 343229780, now seen corresponding path program 1 times [2023-03-31 22:28:41,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:28:41,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106762143] [2023-03-31 22:28:41,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:28:41,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:28:41,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:28:41,749 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:28:41,749 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:28:41,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106762143] [2023-03-31 22:28:41,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106762143] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:28:41,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985227660] [2023-03-31 22:28:41,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:28:41,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:28:41,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:28:41,751 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) [2023-03-31 22:28:41,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 22:28:41,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:28:41,846 INFO L262 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 22:28:41,848 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:28:41,891 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:28:41,891 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:28:41,999 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:28:41,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985227660] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:28:42,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [751564785] [2023-03-31 22:28:42,019 INFO L159 IcfgInterpreter]: Started Sifa with 70 locations of interest [2023-03-31 22:28:42,019 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:28:42,022 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:28:42,026 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:28:42,026 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:28:42,137 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 44 for LOIs [2023-03-31 22:28:42,230 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 16 [2023-03-31 22:28:42,328 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 45 [2023-03-31 22:28:43,477 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 45 for LOIs [2023-03-31 22:28:43,528 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 16 [2023-03-31 22:28:44,490 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 45 [2023-03-31 22:28:48,431 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 77808 conjuctions. This might take some time... [2023-03-31 22:28:58,852 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 1320 conjuctions.