/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/eca-rers2012/Problem02_label44.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 09:21:22,892 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 09:21:22,893 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 09:21:22,923 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 09:21:22,923 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 09:21:22,925 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 09:21:22,928 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 09:21:22,929 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 09:21:22,930 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 09:21:22,934 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 09:21:22,935 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 09:21:22,936 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 09:21:22,936 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 09:21:22,938 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 09:21:22,940 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 09:21:22,941 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 09:21:22,942 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 09:21:22,942 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 09:21:22,944 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 09:21:22,947 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 09:21:22,948 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 09:21:22,949 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 09:21:22,949 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 09:21:22,950 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 09:21:22,956 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 09:21:22,956 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 09:21:22,956 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 09:21:22,958 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 09:21:22,958 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 09:21:22,958 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 09:21:22,958 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 09:21:22,959 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 09:21:22,960 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 09:21:22,960 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 09:21:22,961 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 09:21:22,961 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 09:21:22,961 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 09:21:22,961 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 09:21:22,961 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 09:21:22,962 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 09:21:22,962 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 09:21:22,963 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 09:21:22,985 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 09:21:22,985 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 09:21:22,986 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 09:21:22,986 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 09:21:22,986 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 09:21:22,986 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 09:21:22,986 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 09:21:22,987 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 09:21:22,987 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 09:21:22,987 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 09:21:22,987 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 09:21:22,987 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 09:21:22,987 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 09:21:22,987 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 09:21:22,988 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 09:21:22,988 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 09:21:22,988 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 09:21:22,988 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 09:21:22,988 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 09:21:22,988 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 09:21:22,988 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 09:21:22,988 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 09:21:22,988 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 09:21:22,989 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 09:21:22,989 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 09:21:22,989 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 09:21:22,989 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 09:21:22,989 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 09:21:22,989 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 09:21:22,989 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 09:21:22,989 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 09:21:22,989 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 09:21:22,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:21:22,990 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 09:21:22,990 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 09:21:22,990 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 09:21:22,990 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 09:21:22,990 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 09:21:22,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 09:21:22,990 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 09:21:22,990 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 09:21:22,990 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 09:21:23,182 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 09:21:23,198 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 09:21:23,200 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 09:21:23,201 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 09:21:23,201 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 09:21:23,202 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem02_label44.c [2023-04-01 09:21:24,123 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 09:21:24,368 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 09:21:24,372 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem02_label44.c [2023-04-01 09:21:24,382 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cce848335/9414c390545345059a3d32426bb970ce/FLAGf2f60366d [2023-04-01 09:21:24,392 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cce848335/9414c390545345059a3d32426bb970ce [2023-04-01 09:21:24,394 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 09:21:24,395 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 09:21:24,396 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 09:21:24,396 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 09:21:24,401 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 09:21:24,402 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:21:24" (1/1) ... [2023-04-01 09:21:24,402 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f3243d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:21:24, skipping insertion in model container [2023-04-01 09:21:24,403 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:21:24" (1/1) ... [2023-04-01 09:21:24,407 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 09:21:24,437 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 09:21:24,603 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_label44.c[15425,15438] [2023-04-01 09:21:24,630 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:21:24,649 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 09:21:24,701 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_label44.c[15425,15438] [2023-04-01 09:21:24,713 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:21:24,722 INFO L208 MainTranslator]: Completed translation [2023-04-01 09:21:24,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:21:24 WrapperNode [2023-04-01 09:21:24,723 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 09:21:24,723 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 09:21:24,724 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 09:21:24,724 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 09:21:24,731 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:21:24" (1/1) ... [2023-04-01 09:21:24,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:21:24" (1/1) ... [2023-04-01 09:21:24,742 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:21:24" (1/1) ... [2023-04-01 09:21:24,742 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:21:24" (1/1) ... [2023-04-01 09:21:24,760 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:21:24" (1/1) ... [2023-04-01 09:21:24,768 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:21:24" (1/1) ... [2023-04-01 09:21:24,771 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:21:24" (1/1) ... [2023-04-01 09:21:24,773 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:21:24" (1/1) ... [2023-04-01 09:21:24,777 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 09:21:24,778 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 09:21:24,778 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 09:21:24,778 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 09:21:24,778 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:21:24" (1/1) ... [2023-04-01 09:21:24,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:21:24,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:21:24,798 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 09:21:24,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 09:21:24,830 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 09:21:24,830 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 09:21:24,830 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 09:21:24,831 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 09:21:24,831 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 09:21:24,831 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 09:21:24,831 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 09:21:24,832 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 09:21:24,832 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 09:21:24,832 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 09:21:24,832 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 09:21:24,832 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 09:21:24,832 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 09:21:24,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 09:21:24,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 09:21:24,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 09:21:24,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 09:21:24,833 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 09:21:24,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 09:21:24,898 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 09:21:24,899 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 09:21:25,548 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 09:21:25,728 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 09:21:25,728 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 09:21:25,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:21:25 BoogieIcfgContainer [2023-04-01 09:21:25,730 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 09:21:25,732 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 09:21:25,733 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 09:21:25,735 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 09:21:25,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 09:21:24" (1/3) ... [2023-04-01 09:21:25,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f7869b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:21:25, skipping insertion in model container [2023-04-01 09:21:25,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:21:24" (2/3) ... [2023-04-01 09:21:25,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f7869b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:21:25, skipping insertion in model container [2023-04-01 09:21:25,736 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:21:25" (3/3) ... [2023-04-01 09:21:25,737 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem02_label44.c [2023-04-01 09:21:25,748 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 09:21:25,748 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 09:21:25,793 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 09:21:25,798 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;@7b8fce6b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 09:21:25,798 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 09:21:25,803 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) [2023-04-01 09:21:25,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-01 09:21:25,811 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:21:25,812 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] [2023-04-01 09:21:25,812 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:21:25,816 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:21:25,817 INFO L85 PathProgramCache]: Analyzing trace with hash -2027415080, now seen corresponding path program 1 times [2023-04-01 09:21:25,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:21:25,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228578736] [2023-04-01 09:21:25,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:21:25,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:21:26,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:21:26,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:21:26,363 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:21:26,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228578736] [2023-04-01 09:21:26,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228578736] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:21:26,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:21:26,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 09:21:26,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548131806] [2023-04-01 09:21:26,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:21:26,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 09:21:26,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:21:26,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 09:21:26,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 09:21:26,403 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) [2023-04-01 09:21:26,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:21:26,730 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2023-04-01 09:21:26,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 09:21:26,732 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 [2023-04-01 09:21:26,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:21:26,742 INFO L225 Difference]: With dead ends: 273 [2023-04-01 09:21:26,743 INFO L226 Difference]: Without dead ends: 175 [2023-04-01 09:21:26,746 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 [2023-04-01 09:21:26,748 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 23 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 09:21:26,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 47 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 09:21:26,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-04-01 09:21:26,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2023-04-01 09:21:26,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 167 states have (on average 1.81437125748503) internal successors, (303), 167 states have internal predecessors, (303), 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) [2023-04-01 09:21:26,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 312 transitions. [2023-04-01 09:21:26,799 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 312 transitions. Word has length 86 [2023-04-01 09:21:26,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:21:26,799 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 312 transitions. [2023-04-01 09:21:26,799 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) [2023-04-01 09:21:26,799 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 312 transitions. [2023-04-01 09:21:26,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-04-01 09:21:26,802 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:21:26,802 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 09:21:26,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 09:21:26,802 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:21:26,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:21:26,803 INFO L85 PathProgramCache]: Analyzing trace with hash -78204508, now seen corresponding path program 1 times [2023-04-01 09:21:26,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:21:26,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579619995] [2023-04-01 09:21:26,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:21:26,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:21:26,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:21:27,186 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:21:27,187 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:21:27,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579619995] [2023-04-01 09:21:27,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579619995] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:21:27,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:21:27,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:21:27,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882112212] [2023-04-01 09:21:27,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:21:27,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:21:27,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:21:27,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:21:27,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:21:27,189 INFO L87 Difference]: Start difference. First operand 175 states and 312 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 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) [2023-04-01 09:21:27,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:21:27,616 INFO L93 Difference]: Finished difference Result 535 states and 973 transitions. [2023-04-01 09:21:27,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 09:21:27,617 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 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 94 [2023-04-01 09:21:27,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:21:27,621 INFO L225 Difference]: With dead ends: 535 [2023-04-01 09:21:27,621 INFO L226 Difference]: Without dead ends: 365 [2023-04-01 09:21:27,626 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 [2023-04-01 09:21:27,629 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 268 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 09:21:27,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 46 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 09:21:27,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2023-04-01 09:21:27,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 357. [2023-04-01 09:21:27,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 338 states have (on average 1.6094674556213018) internal successors, (544), 345 states have internal predecessors, (544), 6 states have call successors, (6), 6 states have call predecessors, (6), 12 states have return successors, (29), 5 states have call predecessors, (29), 5 states have call successors, (29) [2023-04-01 09:21:27,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 579 transitions. [2023-04-01 09:21:27,651 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 579 transitions. Word has length 94 [2023-04-01 09:21:27,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:21:27,651 INFO L495 AbstractCegarLoop]: Abstraction has 357 states and 579 transitions. [2023-04-01 09:21:27,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 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) [2023-04-01 09:21:27,651 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 579 transitions. [2023-04-01 09:21:27,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-04-01 09:21:27,653 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:21:27,654 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, 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] [2023-04-01 09:21:27,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 09:21:27,654 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:21:27,654 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:21:27,654 INFO L85 PathProgramCache]: Analyzing trace with hash 360482079, now seen corresponding path program 1 times [2023-04-01 09:21:27,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:21:27,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73814882] [2023-04-01 09:21:27,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:21:27,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:21:27,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:21:27,784 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:21:27,785 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:21:27,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73814882] [2023-04-01 09:21:27,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73814882] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:21:27,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:21:27,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 09:21:27,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363932612] [2023-04-01 09:21:27,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:21:27,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 09:21:27,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:21:27,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 09:21:27,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 09:21:27,786 INFO L87 Difference]: Start difference. First operand 357 states and 579 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:21:28,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:21:28,040 INFO L93 Difference]: Finished difference Result 1057 states and 1779 transitions. [2023-04-01 09:21:28,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 09:21:28,040 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 120 [2023-04-01 09:21:28,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:21:28,043 INFO L225 Difference]: With dead ends: 1057 [2023-04-01 09:21:28,044 INFO L226 Difference]: Without dead ends: 705 [2023-04-01 09:21:28,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 09:21:28,045 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 2 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 09:21:28,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 200 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 09:21:28,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2023-04-01 09:21:28,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 619. [2023-04-01 09:21:28,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 589 states have (on average 1.5449915110356536) internal successors, (910), 601 states have internal predecessors, (910), 9 states have call successors, (9), 9 states have call predecessors, (9), 20 states have return successors, (77), 8 states have call predecessors, (77), 8 states have call successors, (77) [2023-04-01 09:21:28,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 996 transitions. [2023-04-01 09:21:28,065 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 996 transitions. Word has length 120 [2023-04-01 09:21:28,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:21:28,066 INFO L495 AbstractCegarLoop]: Abstraction has 619 states and 996 transitions. [2023-04-01 09:21:28,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:21:28,066 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 996 transitions. [2023-04-01 09:21:28,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-04-01 09:21:28,069 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:21:28,070 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:21:28,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 09:21:28,070 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:21:28,070 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:21:28,070 INFO L85 PathProgramCache]: Analyzing trace with hash 2030617960, now seen corresponding path program 1 times [2023-04-01 09:21:28,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:21:28,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753248208] [2023-04-01 09:21:28,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:21:28,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:21:28,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:21:28,223 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:21:28,223 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:21:28,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753248208] [2023-04-01 09:21:28,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753248208] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:21:28,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:21:28,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:21:28,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798727373] [2023-04-01 09:21:28,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:21:28,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:21:28,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:21:28,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:21:28,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:21:28,225 INFO L87 Difference]: Start difference. First operand 619 states and 996 transitions. Second operand has 5 states, 5 states have (on average 28.0) internal successors, (140), 4 states have internal predecessors, (140), 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) [2023-04-01 09:21:28,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:21:28,559 INFO L93 Difference]: Finished difference Result 1723 states and 2953 transitions. [2023-04-01 09:21:28,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 09:21:28,560 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.0) internal successors, (140), 4 states have internal predecessors, (140), 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 146 [2023-04-01 09:21:28,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:21:28,566 INFO L225 Difference]: With dead ends: 1723 [2023-04-01 09:21:28,567 INFO L226 Difference]: Without dead ends: 1109 [2023-04-01 09:21:28,568 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 [2023-04-01 09:21:28,573 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 259 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 09:21:28,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 42 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 09:21:28,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2023-04-01 09:21:28,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 1077. [2023-04-01 09:21:28,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1077 states, 1018 states have (on average 1.3889980353634577) internal successors, (1414), 1049 states have internal predecessors, (1414), 14 states have call successors, (14), 14 states have call predecessors, (14), 44 states have return successors, (196), 13 states have call predecessors, (196), 13 states have call successors, (196) [2023-04-01 09:21:28,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1077 states to 1077 states and 1624 transitions. [2023-04-01 09:21:28,620 INFO L78 Accepts]: Start accepts. Automaton has 1077 states and 1624 transitions. Word has length 146 [2023-04-01 09:21:28,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:21:28,621 INFO L495 AbstractCegarLoop]: Abstraction has 1077 states and 1624 transitions. [2023-04-01 09:21:28,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.0) internal successors, (140), 4 states have internal predecessors, (140), 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) [2023-04-01 09:21:28,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1077 states and 1624 transitions. [2023-04-01 09:21:28,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-04-01 09:21:28,627 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:21:28,627 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 09:21:28,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 09:21:28,627 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:21:28,628 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:21:28,628 INFO L85 PathProgramCache]: Analyzing trace with hash 646575065, now seen corresponding path program 1 times [2023-04-01 09:21:28,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:21:28,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523570798] [2023-04-01 09:21:28,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:21:28,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:21:28,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:21:28,807 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 57 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 09:21:28,807 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:21:28,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523570798] [2023-04-01 09:21:28,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523570798] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:21:28,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405782027] [2023-04-01 09:21:28,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:21:28,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:21:28,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:21:28,810 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:21:28,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 09:21:28,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:21:28,943 INFO L262 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 09:21:28,950 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:21:29,029 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-04-01 09:21:29,029 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 09:21:29,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405782027] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:21:29,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 09:21:29,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 09:21:29,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319710302] [2023-04-01 09:21:29,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:21:29,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:21:29,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:21:29,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:21:29,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 09:21:29,030 INFO L87 Difference]: Start difference. First operand 1077 states and 1624 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 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) [2023-04-01 09:21:29,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:21:29,379 INFO L93 Difference]: Finished difference Result 2691 states and 4153 transitions. [2023-04-01 09:21:29,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 09:21:29,380 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 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 149 [2023-04-01 09:21:29,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:21:29,387 INFO L225 Difference]: With dead ends: 2691 [2023-04-01 09:21:29,388 INFO L226 Difference]: Without dead ends: 1619 [2023-04-01 09:21:29,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-04-01 09:21:29,391 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 247 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 09:21:29,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 45 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 09:21:29,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1619 states. [2023-04-01 09:21:29,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1619 to 1523. [2023-04-01 09:21:29,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1523 states, 1441 states have (on average 1.3129770992366412) internal successors, (1892), 1485 states have internal predecessors, (1892), 19 states have call successors, (19), 19 states have call predecessors, (19), 62 states have return successors, (293), 18 states have call predecessors, (293), 18 states have call successors, (293) [2023-04-01 09:21:29,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1523 states to 1523 states and 2204 transitions. [2023-04-01 09:21:29,433 INFO L78 Accepts]: Start accepts. Automaton has 1523 states and 2204 transitions. Word has length 149 [2023-04-01 09:21:29,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:21:29,433 INFO L495 AbstractCegarLoop]: Abstraction has 1523 states and 2204 transitions. [2023-04-01 09:21:29,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 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) [2023-04-01 09:21:29,433 INFO L276 IsEmpty]: Start isEmpty. Operand 1523 states and 2204 transitions. [2023-04-01 09:21:29,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-04-01 09:21:29,437 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:21:29,437 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:21:29,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 09:21:29,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:21:29,643 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:21:29,644 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:21:29,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1193888294, now seen corresponding path program 1 times [2023-04-01 09:21:29,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:21:29,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472038606] [2023-04-01 09:21:29,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:21:29,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:21:29,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:21:29,749 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 84 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:21:29,750 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:21:29,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472038606] [2023-04-01 09:21:29,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472038606] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:21:29,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065053985] [2023-04-01 09:21:29,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:21:29,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:21:29,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:21:29,751 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:21:29,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 09:21:29,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:21:29,845 INFO L262 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 09:21:29,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:21:29,970 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-04-01 09:21:29,970 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 09:21:29,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065053985] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:21:29,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 09:21:29,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 09:21:29,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665676274] [2023-04-01 09:21:29,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:21:29,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:21:29,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:21:29,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:21:29,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 09:21:29,972 INFO L87 Difference]: Start difference. First operand 1523 states and 2204 transitions. Second operand has 5 states, 5 states have (on average 23.4) internal successors, (117), 4 states have internal predecessors, (117), 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) [2023-04-01 09:21:30,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:21:30,336 INFO L93 Difference]: Finished difference Result 3903 states and 5990 transitions. [2023-04-01 09:21:30,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 09:21:30,336 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.4) internal successors, (117), 4 states have internal predecessors, (117), 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 149 [2023-04-01 09:21:30,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:21:30,348 INFO L225 Difference]: With dead ends: 3903 [2023-04-01 09:21:30,349 INFO L226 Difference]: Without dead ends: 2291 [2023-04-01 09:21:30,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-04-01 09:21:30,355 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 303 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 09:21:30,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 37 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 09:21:30,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2023-04-01 09:21:30,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 2245. [2023-04-01 09:21:30,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2245 states, 2122 states have (on average 1.2898209236569274) internal successors, (2737), 2191 states have internal predecessors, (2737), 27 states have call successors, (27), 27 states have call predecessors, (27), 95 states have return successors, (432), 26 states have call predecessors, (432), 26 states have call successors, (432) [2023-04-01 09:21:30,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 3196 transitions. [2023-04-01 09:21:30,418 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 3196 transitions. Word has length 149 [2023-04-01 09:21:30,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:21:30,418 INFO L495 AbstractCegarLoop]: Abstraction has 2245 states and 3196 transitions. [2023-04-01 09:21:30,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.4) internal successors, (117), 4 states have internal predecessors, (117), 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) [2023-04-01 09:21:30,419 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 3196 transitions. [2023-04-01 09:21:30,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-04-01 09:21:30,424 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:21:30,424 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 09:21:30,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 09:21:30,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-04-01 09:21:30,630 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:21:30,630 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:21:30,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1446286357, now seen corresponding path program 1 times [2023-04-01 09:21:30,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:21:30,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850603586] [2023-04-01 09:21:30,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:21:30,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:21:30,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:21:30,920 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 86 proven. 14 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-04-01 09:21:30,921 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:21:30,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850603586] [2023-04-01 09:21:30,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850603586] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:21:30,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907732346] [2023-04-01 09:21:30,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:21:30,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:21:30,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:21:30,922 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:21:30,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 09:21:31,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:21:31,023 INFO L262 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 09:21:31,029 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:21:31,065 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 77 proven. 2 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-04-01 09:21:31,065 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:21:31,132 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 101 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-01 09:21:31,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907732346] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:21:31,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1229139734] [2023-04-01 09:21:31,167 INFO L159 IcfgInterpreter]: Started Sifa with 90 locations of interest [2023-04-01 09:21:31,167 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:21:31,169 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:21:31,172 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:21:31,172 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:21:31,461 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 98 for LOIs