/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/Problem01_label44.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 21:11:05,471 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 21:11:05,473 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 21:11:05,511 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 21:11:05,512 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 21:11:05,514 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 21:11:05,517 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 21:11:05,519 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 21:11:05,520 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 21:11:05,525 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 21:11:05,527 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 21:11:05,528 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 21:11:05,529 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 21:11:05,530 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 21:11:05,532 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 21:11:05,533 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 21:11:05,533 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 21:11:05,534 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 21:11:05,536 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 21:11:05,540 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 21:11:05,541 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 21:11:05,542 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 21:11:05,543 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 21:11:05,544 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 21:11:05,551 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 21:11:05,551 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 21:11:05,552 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 21:11:05,553 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 21:11:05,553 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 21:11:05,554 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 21:11:05,554 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 21:11:05,555 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 21:11:05,556 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 21:11:05,556 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 21:11:05,557 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 21:11:05,557 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 21:11:05,557 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 21:11:05,558 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 21:11:05,558 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 21:11:05,558 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 21:11:05,559 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 21:11:05,560 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 21:11:05,590 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 21:11:05,590 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 21:11:05,591 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 21:11:05,591 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 21:11:05,592 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 21:11:05,592 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 21:11:05,592 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 21:11:05,592 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 21:11:05,592 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 21:11:05,592 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 21:11:05,593 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 21:11:05,593 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 21:11:05,593 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 21:11:05,593 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 21:11:05,594 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 21:11:05,594 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 21:11:05,594 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 21:11:05,594 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 21:11:05,594 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 21:11:05,594 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 21:11:05,595 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 21:11:05,595 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 21:11:05,595 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 21:11:05,595 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 21:11:05,595 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 21:11:05,595 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 21:11:05,595 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 21:11:05,595 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 21:11:05,595 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 21:11:05,596 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 21:11:05,596 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 21:11:05,596 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 21:11:05,596 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:11:05,596 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 21:11:05,596 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 21:11:05,596 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 21:11:05,597 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 21:11:05,597 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 21:11:05,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 21:11:05,597 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 21:11:05,597 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 21:11:05,597 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 21:11:05,805 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 21:11:05,832 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 21:11:05,834 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 21:11:05,835 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 21:11:05,835 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 21:11:05,836 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem01_label44.c [2023-03-31 21:11:07,026 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 21:11:07,271 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 21:11:07,271 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem01_label44.c [2023-03-31 21:11:07,287 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/759447ecc/9d31f10fbea4488ab8a13d58ce2e16b4/FLAG9b04a256f [2023-03-31 21:11:07,303 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/759447ecc/9d31f10fbea4488ab8a13d58ce2e16b4 [2023-03-31 21:11:07,305 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 21:11:07,306 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 21:11:07,307 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 21:11:07,307 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 21:11:07,321 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 21:11:07,322 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:11:07" (1/1) ... [2023-03-31 21:11:07,322 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56c42f5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:11:07, skipping insertion in model container [2023-03-31 21:11:07,323 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:11:07" (1/1) ... [2023-03-31 21:11:07,352 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 21:11:07,414 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 21:11:07,759 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/Problem01_label44.c[16002,16015] [2023-03-31 21:11:07,794 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:11:07,803 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 21:11:07,910 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/Problem01_label44.c[16002,16015] [2023-03-31 21:11:07,927 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:11:07,945 INFO L208 MainTranslator]: Completed translation [2023-03-31 21:11:07,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:11:07 WrapperNode [2023-03-31 21:11:07,945 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 21:11:07,946 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 21:11:07,946 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 21:11:07,946 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 21:11:07,959 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:11:07" (1/1) ... [2023-03-31 21:11:07,959 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:11:07" (1/1) ... [2023-03-31 21:11:07,979 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:11:07" (1/1) ... [2023-03-31 21:11:07,979 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:11:07" (1/1) ... [2023-03-31 21:11:08,026 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:11:07" (1/1) ... [2023-03-31 21:11:08,033 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:11:07" (1/1) ... [2023-03-31 21:11:08,039 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:11:07" (1/1) ... [2023-03-31 21:11:08,048 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:11:07" (1/1) ... [2023-03-31 21:11:08,056 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 21:11:08,057 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 21:11:08,057 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 21:11:08,057 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 21:11:08,057 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:11:07" (1/1) ... [2023-03-31 21:11:08,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:11:08,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:11:08,087 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 21:11:08,108 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 21:11:08,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 21:11:08,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 21:11:08,124 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 21:11:08,125 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 21:11:08,125 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 21:11:08,126 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 21:11:08,126 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 21:11:08,126 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 21:11:08,126 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 21:11:08,126 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 21:11:08,126 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 21:11:08,126 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 21:11:08,126 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 21:11:08,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 21:11:08,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 21:11:08,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 21:11:08,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 21:11:08,127 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 21:11:08,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 21:11:08,243 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 21:11:08,245 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 21:11:09,014 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 21:11:09,248 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 21:11:09,248 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 21:11:09,251 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:11:09 BoogieIcfgContainer [2023-03-31 21:11:09,251 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 21:11:09,253 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 21:11:09,253 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 21:11:09,256 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 21:11:09,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 09:11:07" (1/3) ... [2023-03-31 21:11:09,256 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e41ed38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:11:09, skipping insertion in model container [2023-03-31 21:11:09,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:11:07" (2/3) ... [2023-03-31 21:11:09,257 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e41ed38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:11:09, skipping insertion in model container [2023-03-31 21:11:09,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:11:09" (3/3) ... [2023-03-31 21:11:09,259 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem01_label44.c [2023-03-31 21:11:09,274 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 21:11:09,274 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 21:11:09,325 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 21:11:09,330 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;@63e88601, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 21:11:09,331 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 21:11:09,335 INFO L276 IsEmpty]: Start isEmpty. Operand has 86 states, 78 states have (on average 1.8974358974358974) internal successors, (148), 79 states have internal predecessors, (148), 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) [2023-03-31 21:11:09,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-03-31 21:11:09,344 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:11:09,344 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:11:09,345 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:11:09,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:11:09,351 INFO L85 PathProgramCache]: Analyzing trace with hash -2062147492, now seen corresponding path program 1 times [2023-03-31 21:11:09,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:11:09,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872278163] [2023-03-31 21:11:09,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:11:09,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:11:09,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:11:10,047 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 21:11:10,048 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:11:10,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872278163] [2023-03-31 21:11:10,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872278163] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:11:10,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:11:10,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 21:11:10,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022042497] [2023-03-31 21:11:10,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:11:10,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 21:11:10,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:11:10,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 21:11:10,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 21:11:10,083 INFO L87 Difference]: Start difference. First operand has 86 states, 78 states have (on average 1.8974358974358974) internal successors, (148), 79 states have internal predecessors, (148), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 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 21:11:10,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:11:10,426 INFO L93 Difference]: Finished difference Result 246 states and 454 transitions. [2023-03-31 21:11:10,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 21:11:10,429 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 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 77 [2023-03-31 21:11:10,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:11:10,437 INFO L225 Difference]: With dead ends: 246 [2023-03-31 21:11:10,437 INFO L226 Difference]: Without dead ends: 157 [2023-03-31 21:11:10,440 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 21:11:10,442 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 31 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 21:11:10,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 48 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 21:11:10,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-03-31 21:11:10,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2023-03-31 21:11:10,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 149 states have (on average 1.7718120805369129) internal successors, (264), 149 states have internal predecessors, (264), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-03-31 21:11:10,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 273 transitions. [2023-03-31 21:11:10,491 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 273 transitions. Word has length 77 [2023-03-31 21:11:10,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:11:10,492 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 273 transitions. [2023-03-31 21:11:10,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 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 21:11:10,492 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 273 transitions. [2023-03-31 21:11:10,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-03-31 21:11:10,495 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:11:10,495 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:11:10,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 21:11:10,496 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:11:10,496 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:11:10,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1470116022, now seen corresponding path program 1 times [2023-03-31 21:11:10,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:11:10,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3500831] [2023-03-31 21:11:10,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:11:10,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:11:10,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:11:10,729 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:11:10,730 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:11:10,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3500831] [2023-03-31 21:11:10,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3500831] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:11:10,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:11:10,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:11:10,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655373228] [2023-03-31 21:11:10,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:11:10,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:11:10,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:11:10,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:11:10,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:11:10,733 INFO L87 Difference]: Start difference. First operand 157 states and 273 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 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 21:11:11,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:11:11,181 INFO L93 Difference]: Finished difference Result 479 states and 861 transitions. [2023-03-31 21:11:11,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 21:11:11,182 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 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 87 [2023-03-31 21:11:11,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:11:11,189 INFO L225 Difference]: With dead ends: 479 [2023-03-31 21:11:11,189 INFO L226 Difference]: Without dead ends: 327 [2023-03-31 21:11:11,195 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 21:11:11,197 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 269 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 21:11:11,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 40 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 21:11:11,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2023-03-31 21:11:11,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 315. [2023-03-31 21:11:11,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 299 states have (on average 1.7290969899665551) internal successors, (517), 303 states have internal predecessors, (517), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2023-03-31 21:11:11,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 544 transitions. [2023-03-31 21:11:11,249 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 544 transitions. Word has length 87 [2023-03-31 21:11:11,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:11:11,254 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 544 transitions. [2023-03-31 21:11:11,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 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 21:11:11,254 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 544 transitions. [2023-03-31 21:11:11,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-03-31 21:11:11,257 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:11:11,257 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:11:11,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 21:11:11,257 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:11:11,258 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:11:11,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1308839092, now seen corresponding path program 1 times [2023-03-31 21:11:11,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:11:11,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163454020] [2023-03-31 21:11:11,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:11:11,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:11:11,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:11:11,545 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-31 21:11:11,546 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:11:11,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163454020] [2023-03-31 21:11:11,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163454020] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:11:11,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714787774] [2023-03-31 21:11:11,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:11:11,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:11:11,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:11:11,556 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 21:11:11,561 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 21:11:11,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:11:11,660 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-31 21:11:11,666 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:11:11,830 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:11:11,830 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 21:11:11,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714787774] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:11:11,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 21:11:11,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-03-31 21:11:11,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114113291] [2023-03-31 21:11:11,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:11:11,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 21:11:11,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:11:11,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 21:11:11,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:11:11,837 INFO L87 Difference]: Start difference. First operand 315 states and 544 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 21:11:12,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:11:12,100 INFO L93 Difference]: Finished difference Result 852 states and 1516 transitions. [2023-03-31 21:11:12,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 21:11:12,101 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 88 [2023-03-31 21:11:12,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:11:12,111 INFO L225 Difference]: With dead ends: 852 [2023-03-31 21:11:12,111 INFO L226 Difference]: Without dead ends: 542 [2023-03-31 21:11:12,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:11:12,114 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 11 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 21:11:12,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 149 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 21:11:12,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2023-03-31 21:11:12,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 542. [2023-03-31 21:11:12,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 519 states have (on average 1.5240847784200386) internal successors, (791), 524 states have internal predecessors, (791), 9 states have call successors, (9), 9 states have call predecessors, (9), 13 states have return successors, (50), 8 states have call predecessors, (50), 8 states have call successors, (50) [2023-03-31 21:11:12,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 850 transitions. [2023-03-31 21:11:12,145 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 850 transitions. Word has length 88 [2023-03-31 21:11:12,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:11:12,146 INFO L495 AbstractCegarLoop]: Abstraction has 542 states and 850 transitions. [2023-03-31 21:11:12,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 21:11:12,147 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 850 transitions. [2023-03-31 21:11:12,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-03-31 21:11:12,153 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:11:12,154 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:11:12,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 21:11:12,360 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 21:11:12,361 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:11:12,361 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:11:12,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1416808206, now seen corresponding path program 1 times [2023-03-31 21:11:12,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:11:12,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814470631] [2023-03-31 21:11:12,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:11:12,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:11:12,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:11:12,615 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:11:12,615 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:11:12,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814470631] [2023-03-31 21:11:12,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814470631] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:11:12,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:11:12,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:11:12,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407355116] [2023-03-31 21:11:12,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:11:12,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:11:12,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:11:12,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:11:12,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:11:12,618 INFO L87 Difference]: Start difference. First operand 542 states and 850 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 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 21:11:13,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:11:13,079 INFO L93 Difference]: Finished difference Result 1419 states and 2303 transitions. [2023-03-31 21:11:13,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 21:11:13,080 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 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 89 [2023-03-31 21:11:13,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:11:13,084 INFO L225 Difference]: With dead ends: 1419 [2023-03-31 21:11:13,084 INFO L226 Difference]: Without dead ends: 797 [2023-03-31 21:11:13,086 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 21:11:13,090 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 251 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 21:11:13,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 44 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 21:11:13,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2023-03-31 21:11:13,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 641. [2023-03-31 21:11:13,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 604 states have (on average 1.2731788079470199) internal successors, (769), 621 states have internal predecessors, (769), 10 states have call successors, (10), 10 states have call predecessors, (10), 26 states have return successors, (79), 9 states have call predecessors, (79), 9 states have call successors, (79) [2023-03-31 21:11:13,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 858 transitions. [2023-03-31 21:11:13,121 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 858 transitions. Word has length 89 [2023-03-31 21:11:13,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:11:13,121 INFO L495 AbstractCegarLoop]: Abstraction has 641 states and 858 transitions. [2023-03-31 21:11:13,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 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 21:11:13,121 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 858 transitions. [2023-03-31 21:11:13,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-03-31 21:11:13,128 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:11:13,128 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-03-31 21:11:13,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 21:11:13,128 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:11:13,129 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:11:13,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1252317784, now seen corresponding path program 1 times [2023-03-31 21:11:13,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:11:13,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116959161] [2023-03-31 21:11:13,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:11:13,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:11:13,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:11:13,639 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 66 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 21:11:13,639 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:11:13,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116959161] [2023-03-31 21:11:13,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116959161] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:11:13,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121597377] [2023-03-31 21:11:13,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:11:13,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:11:13,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:11:13,641 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 21:11:13,645 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 21:11:13,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:11:13,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-31 21:11:13,798 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:11:13,891 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-03-31 21:11:13,892 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 21:11:13,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121597377] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:11:13,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 21:11:13,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-03-31 21:11:13,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024013046] [2023-03-31 21:11:13,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:11:13,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 21:11:13,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:11:13,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 21:11:13,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-31 21:11:13,894 INFO L87 Difference]: Start difference. First operand 641 states and 858 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 21:11:14,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:11:14,138 INFO L93 Difference]: Finished difference Result 1814 states and 2511 transitions. [2023-03-31 21:11:14,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 21:11:14,138 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 149 [2023-03-31 21:11:14,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:11:14,143 INFO L225 Difference]: With dead ends: 1814 [2023-03-31 21:11:14,143 INFO L226 Difference]: Without dead ends: 1178 [2023-03-31 21:11:14,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-31 21:11:14,146 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 10 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 21:11:14,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 39 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 21:11:14,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2023-03-31 21:11:14,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 793. [2023-03-31 21:11:14,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 751 states have (on average 1.2756324900133156) internal successors, (958), 769 states have internal predecessors, (958), 12 states have call successors, (12), 12 states have call predecessors, (12), 29 states have return successors, (106), 11 states have call predecessors, (106), 11 states have call successors, (106) [2023-03-31 21:11:14,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1076 transitions. [2023-03-31 21:11:14,178 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1076 transitions. Word has length 149 [2023-03-31 21:11:14,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:11:14,179 INFO L495 AbstractCegarLoop]: Abstraction has 793 states and 1076 transitions. [2023-03-31 21:11:14,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 21:11:14,179 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1076 transitions. [2023-03-31 21:11:14,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-03-31 21:11:14,182 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:11:14,182 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-03-31 21:11:14,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 21:11:14,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:11:14,388 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:11:14,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:11:14,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1274686682, now seen corresponding path program 1 times [2023-03-31 21:11:14,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:11:14,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416782591] [2023-03-31 21:11:14,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:11:14,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:11:14,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:11:14,876 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 85 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 21:11:14,876 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:11:14,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416782591] [2023-03-31 21:11:14,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416782591] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:11:14,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798598579] [2023-03-31 21:11:14,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:11:14,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:11:14,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:11:14,881 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) [2023-03-31 21:11:14,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 21:11:15,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:11:15,011 INFO L262 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 21:11:15,015 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:11:15,126 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 116 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:11:15,126 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:11:15,356 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 116 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:11:15,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798598579] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:11:15,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1726148925] [2023-03-31 21:11:15,378 INFO L159 IcfgInterpreter]: Started Sifa with 81 locations of interest [2023-03-31 21:11:15,378 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:11:15,381 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:11:15,385 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:11:15,385 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:11:15,641 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 72 for LOIs [2023-03-31 21:11:16,736 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 82 for LOIs