/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/Problem03_label26.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 21:19:45,499 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 21:19:45,501 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 21:19:45,540 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 21:19:45,540 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 21:19:45,543 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 21:19:45,546 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 21:19:45,548 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 21:19:45,549 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 21:19:45,553 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 21:19:45,555 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 21:19:45,556 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 21:19:45,557 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 21:19:45,559 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 21:19:45,559 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 21:19:45,560 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 21:19:45,561 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 21:19:45,562 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 21:19:45,563 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 21:19:45,568 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 21:19:45,569 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 21:19:45,569 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 21:19:45,571 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 21:19:45,572 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 21:19:45,576 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 21:19:45,577 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 21:19:45,577 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 21:19:45,577 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 21:19:45,577 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 21:19:45,578 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 21:19:45,578 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 21:19:45,578 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 21:19:45,579 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 21:19:45,579 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 21:19:45,580 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 21:19:45,580 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 21:19:45,580 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 21:19:45,580 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 21:19:45,581 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 21:19:45,581 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 21:19:45,582 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 21:19:45,583 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 21:19:45,612 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 21:19:45,612 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 21:19:45,613 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 21:19:45,613 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 21:19:45,613 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 21:19:45,614 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 21:19:45,614 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 21:19:45,614 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 21:19:45,614 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 21:19:45,614 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 21:19:45,615 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 21:19:45,615 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 21:19:45,615 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 21:19:45,615 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 21:19:45,615 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 21:19:45,615 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 21:19:45,615 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 21:19:45,616 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 21:19:45,616 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 21:19:45,616 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 21:19:45,616 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 21:19:45,617 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 21:19:45,617 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 21:19:45,617 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 21:19:45,617 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 21:19:45,617 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 21:19:45,617 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 21:19:45,617 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 21:19:45,617 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 21:19:45,617 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 21:19:45,618 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 21:19:45,618 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 21:19:45,618 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:19:45,618 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 21:19:45,618 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 21:19:45,618 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 21:19:45,618 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 21:19:45,619 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 21:19:45,619 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 21:19:45,619 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 21:19:45,619 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 21:19:45,619 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 21:19:45,798 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 21:19:45,815 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 21:19:45,817 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 21:19:45,818 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 21:19:45,818 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 21:19:45,819 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label26.c [2023-03-31 21:19:46,961 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 21:19:47,245 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 21:19:47,245 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label26.c [2023-03-31 21:19:47,260 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ad3e3430/f8335f7d944345ff9112d151a2181d4e/FLAG8e4248c39 [2023-03-31 21:19:47,274 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ad3e3430/f8335f7d944345ff9112d151a2181d4e [2023-03-31 21:19:47,276 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 21:19:47,277 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 21:19:47,280 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 21:19:47,280 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 21:19:47,286 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 21:19:47,287 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:19:47" (1/1) ... [2023-03-31 21:19:47,288 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e7cd60c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:19:47, skipping insertion in model container [2023-03-31 21:19:47,288 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:19:47" (1/1) ... [2023-03-31 21:19:47,294 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 21:19:47,360 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 21:19:47,753 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/Problem03_label26.c[55276,55289] [2023-03-31 21:19:47,821 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:19:47,833 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 21:19:48,004 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/Problem03_label26.c[55276,55289] [2023-03-31 21:19:48,024 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:19:48,040 INFO L208 MainTranslator]: Completed translation [2023-03-31 21:19:48,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:19:48 WrapperNode [2023-03-31 21:19:48,041 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 21:19:48,042 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 21:19:48,042 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 21:19:48,042 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 21:19:48,051 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:19:48" (1/1) ... [2023-03-31 21:19:48,052 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:19:48" (1/1) ... [2023-03-31 21:19:48,079 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:19:48" (1/1) ... [2023-03-31 21:19:48,079 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:19:48" (1/1) ... [2023-03-31 21:19:48,159 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:19:48" (1/1) ... [2023-03-31 21:19:48,180 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:19:48" (1/1) ... [2023-03-31 21:19:48,189 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:19:48" (1/1) ... [2023-03-31 21:19:48,202 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:19:48" (1/1) ... [2023-03-31 21:19:48,210 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 21:19:48,211 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 21:19:48,211 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 21:19:48,212 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 21:19:48,213 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:19:48" (1/1) ... [2023-03-31 21:19:48,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:19:48,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:19:48,246 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 21:19:48,266 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 21:19:48,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 21:19:48,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 21:19:48,283 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 21:19:48,283 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 21:19:48,283 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 21:19:48,283 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 21:19:48,283 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 21:19:48,283 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 21:19:48,284 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 21:19:48,284 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 21:19:48,284 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 21:19:48,284 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 21:19:48,284 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 21:19:48,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 21:19:48,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 21:19:48,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 21:19:48,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 21:19:48,284 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 21:19:48,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 21:19:48,358 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 21:19:48,360 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 21:19:49,850 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 21:19:50,196 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 21:19:50,196 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 21:19:50,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:19:50 BoogieIcfgContainer [2023-03-31 21:19:50,199 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 21:19:50,206 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 21:19:50,206 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 21:19:50,208 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 21:19:50,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 09:19:47" (1/3) ... [2023-03-31 21:19:50,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e65f14c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:19:50, skipping insertion in model container [2023-03-31 21:19:50,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:19:48" (2/3) ... [2023-03-31 21:19:50,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e65f14c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:19:50, skipping insertion in model container [2023-03-31 21:19:50,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:19:50" (3/3) ... [2023-03-31 21:19:50,211 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label26.c [2023-03-31 21:19:50,225 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 21:19:50,225 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 21:19:50,264 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 21:19:50,271 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;@1c7752f0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 21:19:50,272 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 21:19:50,279 INFO L276 IsEmpty]: Start isEmpty. Operand has 158 states, 150 states have (on average 1.9466666666666668) internal successors, (292), 151 states have internal predecessors, (292), 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 21:19:50,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-03-31 21:19:50,295 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:19:50,296 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, 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 21:19:50,297 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:19:50,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:19:50,303 INFO L85 PathProgramCache]: Analyzing trace with hash 729810279, now seen corresponding path program 1 times [2023-03-31 21:19:50,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:19:50,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113643022] [2023-03-31 21:19:50,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:19:50,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:19:50,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:19:51,386 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 21:19:51,386 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:19:51,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113643022] [2023-03-31 21:19:51,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113643022] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:19:51,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:19:51,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 21:19:51,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415009250] [2023-03-31 21:19:51,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:19:51,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 21:19:51,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:19:51,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 21:19:51,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 21:19:51,436 INFO L87 Difference]: Start difference. First operand has 158 states, 150 states have (on average 1.9466666666666668) internal successors, (292), 151 states have internal predecessors, (292), 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 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 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 21:19:52,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:19:52,185 INFO L93 Difference]: Finished difference Result 462 states and 886 transitions. [2023-03-31 21:19:52,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 21:19:52,187 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 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 149 [2023-03-31 21:19:52,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:19:52,203 INFO L225 Difference]: With dead ends: 462 [2023-03-31 21:19:52,204 INFO L226 Difference]: Without dead ends: 301 [2023-03-31 21:19:52,207 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 21:19:52,211 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 43 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-03-31 21:19:52,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 70 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-03-31 21:19:52,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2023-03-31 21:19:52,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2023-03-31 21:19:52,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 293 states have (on average 1.795221843003413) internal successors, (526), 293 states have internal predecessors, (526), 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 21:19:52,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 535 transitions. [2023-03-31 21:19:52,290 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 535 transitions. Word has length 149 [2023-03-31 21:19:52,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:19:52,291 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 535 transitions. [2023-03-31 21:19:52,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 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 21:19:52,292 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 535 transitions. [2023-03-31 21:19:52,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2023-03-31 21:19:52,295 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:19:52,295 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, 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 21:19:52,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 21:19:52,296 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:19:52,296 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:19:52,300 INFO L85 PathProgramCache]: Analyzing trace with hash -455597114, now seen corresponding path program 1 times [2023-03-31 21:19:52,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:19:52,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027632480] [2023-03-31 21:19:52,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:19:52,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:19:52,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:19:52,733 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 21:19:52,734 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:19:52,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027632480] [2023-03-31 21:19:52,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027632480] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:19:52,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:19:52,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:19:52,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054244869] [2023-03-31 21:19:52,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:19:52,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:19:52,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:19:52,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:19:52,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:19:52,737 INFO L87 Difference]: Start difference. First operand 301 states and 535 transitions. Second operand has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 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 21:19:53,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:19:53,564 INFO L93 Difference]: Finished difference Result 917 states and 1650 transitions. [2023-03-31 21:19:53,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 21:19:53,566 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 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 161 [2023-03-31 21:19:53,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:19:53,571 INFO L225 Difference]: With dead ends: 917 [2023-03-31 21:19:53,571 INFO L226 Difference]: Without dead ends: 621 [2023-03-31 21:19:53,578 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 21:19:53,579 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 491 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-03-31 21:19:53,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [491 Valid, 44 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 862 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-03-31 21:19:53,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2023-03-31 21:19:53,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 609. [2023-03-31 21:19:53,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 590 states have (on average 1.7457627118644068) internal successors, (1030), 597 states have internal predecessors, (1030), 6 states have call successors, (6), 6 states have call predecessors, (6), 12 states have return successors, (28), 5 states have call predecessors, (28), 5 states have call successors, (28) [2023-03-31 21:19:53,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 1064 transitions. [2023-03-31 21:19:53,616 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 1064 transitions. Word has length 161 [2023-03-31 21:19:53,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:19:53,623 INFO L495 AbstractCegarLoop]: Abstraction has 609 states and 1064 transitions. [2023-03-31 21:19:53,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 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 21:19:53,623 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 1064 transitions. [2023-03-31 21:19:53,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2023-03-31 21:19:53,627 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:19:53,628 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 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 21:19:53,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 21:19:53,628 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:19:53,628 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:19:53,629 INFO L85 PathProgramCache]: Analyzing trace with hash -897372305, now seen corresponding path program 1 times [2023-03-31 21:19:53,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:19:53,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518145155] [2023-03-31 21:19:53,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:19:53,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:19:53,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:19:54,052 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:19:54,053 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:19:54,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518145155] [2023-03-31 21:19:54,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518145155] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:19:54,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:19:54,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:19:54,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575831002] [2023-03-31 21:19:54,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:19:54,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:19:54,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:19:54,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:19:54,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:19:54,055 INFO L87 Difference]: Start difference. First operand 609 states and 1064 transitions. Second operand has 5 states, 5 states have (on average 32.0) internal successors, (160), 4 states have internal predecessors, (160), 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 21:19:54,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:19:54,521 INFO L93 Difference]: Finished difference Result 1213 states and 2139 transitions. [2023-03-31 21:19:54,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 21:19:54,522 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 4 states have internal predecessors, (160), 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 166 [2023-03-31 21:19:54,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:19:54,525 INFO L225 Difference]: With dead ends: 1213 [2023-03-31 21:19:54,525 INFO L226 Difference]: Without dead ends: 609 [2023-03-31 21:19:54,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-31 21:19:54,528 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 511 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 21:19:54,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [511 Valid, 20 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 21:19:54,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2023-03-31 21:19:54,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 609. [2023-03-31 21:19:54,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 590 states have (on average 1.6610169491525424) internal successors, (980), 597 states have internal predecessors, (980), 6 states have call successors, (6), 6 states have call predecessors, (6), 12 states have return successors, (28), 5 states have call predecessors, (28), 5 states have call successors, (28) [2023-03-31 21:19:54,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 1014 transitions. [2023-03-31 21:19:54,548 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 1014 transitions. Word has length 166 [2023-03-31 21:19:54,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:19:54,548 INFO L495 AbstractCegarLoop]: Abstraction has 609 states and 1014 transitions. [2023-03-31 21:19:54,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 4 states have internal predecessors, (160), 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 21:19:54,549 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 1014 transitions. [2023-03-31 21:19:54,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2023-03-31 21:19:54,551 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:19:54,552 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 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 21:19:54,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 21:19:54,552 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:19:54,552 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:19:54,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1563391569, now seen corresponding path program 1 times [2023-03-31 21:19:54,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:19:54,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162810513] [2023-03-31 21:19:54,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:19:54,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:19:54,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:19:55,020 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 21:19:55,021 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:19:55,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162810513] [2023-03-31 21:19:55,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162810513] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:19:55,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504047620] [2023-03-31 21:19:55,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:19:55,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:19:55,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:19:55,029 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 21:19:55,055 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 21:19:55,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:19:55,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 1035 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 21:19:55,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:19:55,366 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-03-31 21:19:55,367 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 21:19:55,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504047620] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:19:55,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 21:19:55,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-03-31 21:19:55,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781546174] [2023-03-31 21:19:55,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:19:55,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:19:55,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:19:55,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:19:55,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-03-31 21:19:55,369 INFO L87 Difference]: Start difference. First operand 609 states and 1014 transitions. Second operand has 5 states, 5 states have (on average 31.6) internal successors, (158), 4 states have internal predecessors, (158), 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 21:19:56,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:19:56,194 INFO L93 Difference]: Finished difference Result 1863 states and 3255 transitions. [2023-03-31 21:19:56,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 21:19:56,196 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.6) internal successors, (158), 4 states have internal predecessors, (158), 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 171 [2023-03-31 21:19:56,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:19:56,204 INFO L225 Difference]: With dead ends: 1863 [2023-03-31 21:19:56,205 INFO L226 Difference]: Without dead ends: 1259 [2023-03-31 21:19:56,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-03-31 21:19:56,211 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 542 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-03-31 21:19:56,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [542 Valid, 37 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-03-31 21:19:56,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2023-03-31 21:19:56,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 1225. [2023-03-31 21:19:56,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1225 states, 1184 states have (on average 1.5650337837837838) internal successors, (1853), 1205 states have internal predecessors, (1853), 10 states have call successors, (10), 10 states have call predecessors, (10), 30 states have return successors, (122), 9 states have call predecessors, (122), 9 states have call successors, (122) [2023-03-31 21:19:56,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1225 states to 1225 states and 1985 transitions. [2023-03-31 21:19:56,270 INFO L78 Accepts]: Start accepts. Automaton has 1225 states and 1985 transitions. Word has length 171 [2023-03-31 21:19:56,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:19:56,271 INFO L495 AbstractCegarLoop]: Abstraction has 1225 states and 1985 transitions. [2023-03-31 21:19:56,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.6) internal successors, (158), 4 states have internal predecessors, (158), 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 21:19:56,272 INFO L276 IsEmpty]: Start isEmpty. Operand 1225 states and 1985 transitions. [2023-03-31 21:19:56,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-03-31 21:19:56,279 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:19:56,281 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 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 21:19:56,291 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 21:19:56,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:19:56,489 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:19:56,490 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:19:56,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1415104412, now seen corresponding path program 1 times [2023-03-31 21:19:56,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:19:56,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404361673] [2023-03-31 21:19:56,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:19:56,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:19:56,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:19:57,401 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 21:19:57,401 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:19:57,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404361673] [2023-03-31 21:19:57,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404361673] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:19:57,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265049639] [2023-03-31 21:19:57,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:19:57,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:19:57,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:19:57,405 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 21:19:57,417 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 21:19:57,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:19:57,645 INFO L262 TraceCheckSpWp]: Trace formula consists of 1030 conjuncts, 8 conjunts are in the unsatisfiable core [2023-03-31 21:19:57,650 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:19:57,715 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 21:19:57,715 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 21:19:57,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265049639] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:19:57,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 21:19:57,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-03-31 21:19:57,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630940335] [2023-03-31 21:19:57,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:19:57,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:19:57,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:19:57,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:19:57,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-03-31 21:19:57,717 INFO L87 Difference]: Start difference. First operand 1225 states and 1985 transitions. Second operand has 5 states, 5 states have (on average 32.0) internal successors, (160), 4 states have internal predecessors, (160), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 21:19:58,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:19:58,096 INFO L93 Difference]: Finished difference Result 3743 states and 6322 transitions. [2023-03-31 21:19:58,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 21:19:58,105 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 4 states have internal predecessors, (160), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 172 [2023-03-31 21:19:58,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:19:58,120 INFO L225 Difference]: With dead ends: 3743 [2023-03-31 21:19:58,120 INFO L226 Difference]: Without dead ends: 2523 [2023-03-31 21:19:58,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-03-31 21:19:58,136 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 728 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 21:19:58,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [728 Valid, 547 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 21:19:58,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2523 states. [2023-03-31 21:19:58,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2523 to 2485. [2023-03-31 21:19:58,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2485 states, 2386 states have (on average 1.559094719195306) internal successors, (3720), 2449 states have internal predecessors, (3720), 18 states have call successors, (18), 18 states have call predecessors, (18), 80 states have return successors, (369), 17 states have call predecessors, (369), 17 states have call successors, (369) [2023-03-31 21:19:58,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2485 states to 2485 states and 4107 transitions. [2023-03-31 21:19:58,278 INFO L78 Accepts]: Start accepts. Automaton has 2485 states and 4107 transitions. Word has length 172 [2023-03-31 21:19:58,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:19:58,278 INFO L495 AbstractCegarLoop]: Abstraction has 2485 states and 4107 transitions. [2023-03-31 21:19:58,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 4 states have internal predecessors, (160), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 21:19:58,278 INFO L276 IsEmpty]: Start isEmpty. Operand 2485 states and 4107 transitions. [2023-03-31 21:19:58,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-03-31 21:19:58,286 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:19:58,286 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 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 21:19:58,300 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 21:19:58,494 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 21:19:58,494 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:19:58,495 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:19:58,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1408848384, now seen corresponding path program 1 times [2023-03-31 21:19:58,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:19:58,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004571608] [2023-03-31 21:19:58,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:19:58,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:19:58,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:19:59,309 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 21:19:59,310 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:19:59,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004571608] [2023-03-31 21:19:59,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004571608] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:19:59,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819198377] [2023-03-31 21:19:59,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:19:59,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:19:59,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:19:59,312 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 21:19:59,322 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 21:19:59,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:19:59,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 1017 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 21:19:59,542 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:19:59,589 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:19:59,589 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:19:59,672 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:19:59,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819198377] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:19:59,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [265652597] [2023-03-31 21:19:59,692 INFO L159 IcfgInterpreter]: Started Sifa with 153 locations of interest [2023-03-31 21:19:59,692 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:19:59,695 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:19:59,699 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:19:59,699 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:20:00,366 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 162 for LOIs [2023-03-31 21:20:02,676 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 148 for LOIs