/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/Problem02_label02.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 21:12:27,599 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 21:12:27,601 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 21:12:27,637 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 21:12:27,638 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 21:12:27,641 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 21:12:27,644 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 21:12:27,646 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 21:12:27,648 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 21:12:27,652 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 21:12:27,653 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 21:12:27,654 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 21:12:27,655 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 21:12:27,660 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 21:12:27,661 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 21:12:27,662 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 21:12:27,663 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 21:12:27,663 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 21:12:27,666 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 21:12:27,672 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 21:12:27,673 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 21:12:27,674 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 21:12:27,675 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 21:12:27,676 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 21:12:27,681 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 21:12:27,681 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 21:12:27,681 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 21:12:27,682 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 21:12:27,683 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 21:12:27,683 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 21:12:27,683 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 21:12:27,684 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 21:12:27,685 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 21:12:27,686 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 21:12:27,686 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 21:12:27,686 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 21:12:27,687 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 21:12:27,687 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 21:12:27,687 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 21:12:27,688 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 21:12:27,688 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 21:12:27,689 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 21:12:27,719 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 21:12:27,720 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 21:12:27,720 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 21:12:27,720 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 21:12:27,721 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 21:12:27,721 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 21:12:27,721 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 21:12:27,721 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 21:12:27,721 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 21:12:27,721 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 21:12:27,722 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 21:12:27,722 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 21:12:27,722 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 21:12:27,723 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 21:12:27,723 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 21:12:27,723 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 21:12:27,723 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 21:12:27,723 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 21:12:27,723 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 21:12:27,724 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 21:12:27,724 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 21:12:27,724 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 21:12:27,724 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 21:12:27,724 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 21:12:27,724 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 21:12:27,724 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 21:12:27,724 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 21:12:27,724 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 21:12:27,725 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 21:12:27,725 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 21:12:27,725 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 21:12:27,725 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 21:12:27,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:12:27,725 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 21:12:27,725 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 21:12:27,726 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 21:12:27,726 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 21:12:27,726 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 21:12:27,726 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 21:12:27,726 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 21:12:27,726 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 21:12:27,726 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 21:12:27,956 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 21:12:27,976 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 21:12:27,978 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 21:12:27,979 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 21:12:27,982 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 21:12:27,983 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem02_label02.c [2023-03-31 21:12:29,137 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 21:12:29,412 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 21:12:29,421 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem02_label02.c [2023-03-31 21:12:29,434 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bd1bf04a/b6c9b34ffbe24649ab3eca18c785a3ba/FLAGc3009c27c [2023-03-31 21:12:29,446 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bd1bf04a/b6c9b34ffbe24649ab3eca18c785a3ba [2023-03-31 21:12:29,448 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 21:12:29,450 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 21:12:29,451 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 21:12:29,451 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 21:12:29,456 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 21:12:29,456 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:12:29" (1/1) ... [2023-03-31 21:12:29,458 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d717c79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:12:29, skipping insertion in model container [2023-03-31 21:12:29,458 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:12:29" (1/1) ... [2023-03-31 21:12:29,464 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 21:12:29,514 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 21:12:29,799 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/Problem02_label02.c[15989,16002] [2023-03-31 21:12:29,850 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:12:29,859 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 21:12:29,948 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/Problem02_label02.c[15989,16002] [2023-03-31 21:12:29,971 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:12:29,993 INFO L208 MainTranslator]: Completed translation [2023-03-31 21:12:29,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:12:29 WrapperNode [2023-03-31 21:12:29,994 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 21:12:29,996 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 21:12:29,996 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 21:12:29,997 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 21:12:30,016 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:12:29" (1/1) ... [2023-03-31 21:12:30,016 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:12:29" (1/1) ... [2023-03-31 21:12:30,046 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:12:29" (1/1) ... [2023-03-31 21:12:30,046 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:12:29" (1/1) ... [2023-03-31 21:12:30,074 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:12:29" (1/1) ... [2023-03-31 21:12:30,083 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:12:29" (1/1) ... [2023-03-31 21:12:30,086 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:12:29" (1/1) ... [2023-03-31 21:12:30,089 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:12:29" (1/1) ... [2023-03-31 21:12:30,094 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 21:12:30,095 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 21:12:30,095 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 21:12:30,095 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 21:12:30,096 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:12:29" (1/1) ... [2023-03-31 21:12:30,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:12:30,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:12:30,154 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 21:12:30,172 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 21:12:30,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 21:12:30,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 21:12:30,189 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 21:12:30,190 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 21:12:30,190 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 21:12:30,191 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 21:12:30,191 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 21:12:30,191 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 21:12:30,191 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 21:12:30,192 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 21:12:30,192 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 21:12:30,192 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 21:12:30,192 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 21:12:30,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 21:12:30,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 21:12:30,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 21:12:30,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 21:12:30,193 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 21:12:30,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 21:12:30,281 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 21:12:30,283 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 21:12:31,217 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 21:12:31,432 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 21:12:31,432 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 21:12:31,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:12:31 BoogieIcfgContainer [2023-03-31 21:12:31,435 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 21:12:31,438 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 21:12:31,438 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 21:12:31,440 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 21:12:31,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 09:12:29" (1/3) ... [2023-03-31 21:12:31,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e388e7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:12:31, skipping insertion in model container [2023-03-31 21:12:31,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:12:29" (2/3) ... [2023-03-31 21:12:31,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e388e7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:12:31, skipping insertion in model container [2023-03-31 21:12:31,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:12:31" (3/3) ... [2023-03-31 21:12:31,443 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem02_label02.c [2023-03-31 21:12:31,457 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 21:12:31,457 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 21:12:31,506 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 21:12:31,512 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;@7ff044e4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 21:12:31,512 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 21:12:31,516 INFO L276 IsEmpty]: Start isEmpty. Operand has 95 states, 87 states have (on average 1.9080459770114941) internal successors, (166), 88 states have internal predecessors, (166), 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 21:12:31,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-03-31 21:12:31,526 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:12:31,526 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] [2023-03-31 21:12:31,527 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:12:31,533 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:12:31,533 INFO L85 PathProgramCache]: Analyzing trace with hash -818171561, now seen corresponding path program 1 times [2023-03-31 21:12:31,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:12:31,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343438901] [2023-03-31 21:12:31,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:12:31,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:12:31,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:12:32,134 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 21:12:32,134 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:12:32,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343438901] [2023-03-31 21:12:32,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343438901] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:12:32,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:12:32,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 21:12:32,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599603922] [2023-03-31 21:12:32,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:12:32,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 21:12:32,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:12:32,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 21:12:32,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 21:12:32,180 INFO L87 Difference]: Start difference. First operand has 95 states, 87 states have (on average 1.9080459770114941) internal successors, (166), 88 states have internal predecessors, (166), 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 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 21:12:32,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:12:32,613 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2023-03-31 21:12:32,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 21:12:32,616 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 86 [2023-03-31 21:12:32,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:12:32,624 INFO L225 Difference]: With dead ends: 273 [2023-03-31 21:12:32,625 INFO L226 Difference]: Without dead ends: 175 [2023-03-31 21:12:32,627 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 21:12:32,630 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 63 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 21:12:32,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 30 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 21:12:32,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-03-31 21:12:32,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2023-03-31 21:12:32,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 167 states have (on average 1.904191616766467) internal successors, (318), 167 states have internal predecessors, (318), 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 21:12:32,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 327 transitions. [2023-03-31 21:12:32,676 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 327 transitions. Word has length 86 [2023-03-31 21:12:32,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:12:32,677 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 327 transitions. [2023-03-31 21:12:32,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 21:12:32,677 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 327 transitions. [2023-03-31 21:12:32,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-03-31 21:12:32,681 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:12:32,681 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-31 21:12:32,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 21:12:32,682 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:12:32,683 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:12:32,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1159810975, now seen corresponding path program 1 times [2023-03-31 21:12:32,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:12:32,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011750063] [2023-03-31 21:12:32,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:12:32,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:12:32,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:12:32,949 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:12:32,950 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:12:32,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011750063] [2023-03-31 21:12:32,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011750063] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:12:32,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:12:32,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:12:32,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28830610] [2023-03-31 21:12:32,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:12:32,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:12:32,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:12:32,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:12:32,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:12:32,955 INFO L87 Difference]: Start difference. First operand 175 states and 327 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 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 21:12:33,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:12:33,393 INFO L93 Difference]: Finished difference Result 529 states and 1003 transitions. [2023-03-31 21:12:33,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 21:12:33,393 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 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 101 [2023-03-31 21:12:33,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:12:33,397 INFO L225 Difference]: With dead ends: 529 [2023-03-31 21:12:33,397 INFO L226 Difference]: Without dead ends: 359 [2023-03-31 21:12:33,398 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 21:12:33,400 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 363 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 21:12:33,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [363 Valid, 48 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 21:12:33,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2023-03-31 21:12:33,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 267. [2023-03-31 21:12:33,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 253 states have (on average 1.8339920948616601) internal successors, (464), 257 states have internal predecessors, (464), 5 states have call successors, (5), 5 states have call predecessors, (5), 8 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2023-03-31 21:12:33,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 484 transitions. [2023-03-31 21:12:33,424 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 484 transitions. Word has length 101 [2023-03-31 21:12:33,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:12:33,424 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 484 transitions. [2023-03-31 21:12:33,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 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 21:12:33,425 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 484 transitions. [2023-03-31 21:12:33,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-03-31 21:12:33,428 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:12:33,428 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:12:33,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 21:12:33,434 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:12:33,434 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:12:33,435 INFO L85 PathProgramCache]: Analyzing trace with hash 242732230, now seen corresponding path program 1 times [2023-03-31 21:12:33,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:12:33,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888046295] [2023-03-31 21:12:33,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:12:33,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:12:33,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:12:33,694 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:12:33,695 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:12:33,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888046295] [2023-03-31 21:12:33,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888046295] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:12:33,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:12:33,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:12:33,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711090447] [2023-03-31 21:12:33,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:12:33,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:12:33,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:12:33,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:12:33,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:12:33,698 INFO L87 Difference]: Start difference. First operand 267 states and 484 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 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 21:12:34,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:12:34,097 INFO L93 Difference]: Finished difference Result 833 states and 1554 transitions. [2023-03-31 21:12:34,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 21:12:34,098 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 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 108 [2023-03-31 21:12:34,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:12:34,101 INFO L225 Difference]: With dead ends: 833 [2023-03-31 21:12:34,101 INFO L226 Difference]: Without dead ends: 571 [2023-03-31 21:12:34,103 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 21:12:34,104 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 273 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 21:12:34,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 108 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 21:12:34,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2023-03-31 21:12:34,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 545. [2023-03-31 21:12:34,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 512 states have (on average 1.736328125) internal successors, (889), 529 states have internal predecessors, (889), 8 states have call successors, (8), 8 states have call predecessors, (8), 24 states have return successors, (59), 7 states have call predecessors, (59), 7 states have call successors, (59) [2023-03-31 21:12:34,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 956 transitions. [2023-03-31 21:12:34,177 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 956 transitions. Word has length 108 [2023-03-31 21:12:34,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:12:34,177 INFO L495 AbstractCegarLoop]: Abstraction has 545 states and 956 transitions. [2023-03-31 21:12:34,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 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 21:12:34,177 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 956 transitions. [2023-03-31 21:12:34,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-03-31 21:12:34,194 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:12:34,194 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:12:34,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 21:12:34,198 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:12:34,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:12:34,199 INFO L85 PathProgramCache]: Analyzing trace with hash -810558258, now seen corresponding path program 1 times [2023-03-31 21:12:34,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:12:34,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587175967] [2023-03-31 21:12:34,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:12:34,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:12:34,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:12:34,414 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:12:34,415 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:12:34,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587175967] [2023-03-31 21:12:34,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587175967] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:12:34,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:12:34,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:12:34,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530430955] [2023-03-31 21:12:34,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:12:34,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:12:34,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:12:34,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:12:34,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:12:34,418 INFO L87 Difference]: Start difference. First operand 545 states and 956 transitions. Second operand has 5 states, 5 states have (on average 21.2) internal successors, (106), 4 states have internal predecessors, (106), 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 21:12:34,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:12:34,825 INFO L93 Difference]: Finished difference Result 1673 states and 3157 transitions. [2023-03-31 21:12:34,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 21:12:34,826 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 4 states have internal predecessors, (106), 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 112 [2023-03-31 21:12:34,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:12:34,833 INFO L225 Difference]: With dead ends: 1673 [2023-03-31 21:12:34,833 INFO L226 Difference]: Without dead ends: 1133 [2023-03-31 21:12:34,834 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 21:12:34,835 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 330 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 21:12:34,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 42 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 21:12:34,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2023-03-31 21:12:34,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 1105. [2023-03-31 21:12:34,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1105 states, 1032 states have (on average 1.5998062015503876) internal successors, (1651), 1077 states have internal predecessors, (1651), 14 states have call successors, (14), 14 states have call predecessors, (14), 58 states have return successors, (221), 13 states have call predecessors, (221), 13 states have call successors, (221) [2023-03-31 21:12:34,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1105 states to 1105 states and 1886 transitions. [2023-03-31 21:12:34,886 INFO L78 Accepts]: Start accepts. Automaton has 1105 states and 1886 transitions. Word has length 112 [2023-03-31 21:12:34,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:12:34,886 INFO L495 AbstractCegarLoop]: Abstraction has 1105 states and 1886 transitions. [2023-03-31 21:12:34,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 4 states have internal predecessors, (106), 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 21:12:34,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1105 states and 1886 transitions. [2023-03-31 21:12:34,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-03-31 21:12:34,890 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:12:34,890 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:12:34,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 21:12:34,890 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:12:34,891 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:12:34,891 INFO L85 PathProgramCache]: Analyzing trace with hash -205548398, now seen corresponding path program 1 times [2023-03-31 21:12:34,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:12:34,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358367546] [2023-03-31 21:12:34,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:12:34,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:12:34,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:12:35,437 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 21:12:35,437 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:12:35,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358367546] [2023-03-31 21:12:35,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358367546] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:12:35,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797744776] [2023-03-31 21:12:35,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:12:35,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:12:35,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:12:35,445 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 21:12:35,469 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 21:12:35,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:12:35,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 21:12:35,596 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:12:35,718 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:12:35,718 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:12:35,841 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:12:35,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797744776] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:12:35,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [915986339] [2023-03-31 21:12:35,865 INFO L159 IcfgInterpreter]: Started Sifa with 90 locations of interest [2023-03-31 21:12:35,865 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:12:35,868 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:12:35,872 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:12:35,879 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:12:36,172 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 65 for LOIs [2023-03-31 21:12:37,224 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 77 for LOIs