/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 OctagonDomain -i ../sv-benchmarks/c/eca-rers2012/Problem15_label03.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:12:46,850 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:12:46,852 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:12:46,882 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:12:46,882 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:12:46,884 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:12:46,887 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:12:46,889 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:12:46,890 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:12:46,893 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:12:46,895 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:12:46,896 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:12:46,896 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:12:46,898 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:12:46,899 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:12:46,900 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:12:46,900 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:12:46,901 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:12:46,902 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:12:46,906 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:12:46,907 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:12:46,908 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:12:46,908 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:12:46,909 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:12:46,913 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:12:46,914 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:12:46,914 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:12:46,915 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:12:46,916 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:12:46,916 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:12:46,917 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:12:46,917 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:12:46,918 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:12:46,919 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:12:46,920 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:12:46,920 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:12:46,920 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:12:46,920 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:12:46,921 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:12:46,921 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:12:46,922 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:12:46,922 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 04:12:46,948 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:12:46,949 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:12:46,949 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:12:46,949 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:12:46,950 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:12:46,950 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:12:46,950 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:12:46,950 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:12:46,950 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:12:46,950 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:12:46,951 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:12:46,951 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:12:46,951 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:12:46,951 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:12:46,951 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:12:46,951 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:12:46,951 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:12:46,951 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:12:46,952 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:12:46,952 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:12:46,952 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:12:46,952 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:12:46,952 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:12:46,952 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:12:46,952 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:12:46,953 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:12:46,953 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:12:46,953 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:12:46,953 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:12:46,953 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:12:46,953 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:12:46,953 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:12:46,953 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:12:46,953 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:12:46,954 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:12:46,954 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:12:46,954 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:12:46,954 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:12:46,954 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:12:46,954 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:12:46,954 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:12:46,954 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:12:47,126 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:12:47,146 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:12:47,148 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:12:47,148 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:12:47,149 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:12:47,149 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label03.c [2023-04-01 04:12:48,210 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:12:48,436 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:12:48,436 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label03.c [2023-04-01 04:12:48,448 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/acef27fe2/8563039aa1894d28b9f35e9feba76ba5/FLAGdc6c89d4f [2023-04-01 04:12:48,458 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/acef27fe2/8563039aa1894d28b9f35e9feba76ba5 [2023-04-01 04:12:48,460 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:12:48,461 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:12:48,462 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:12:48,462 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:12:48,464 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:12:48,464 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:12:48" (1/1) ... [2023-04-01 04:12:48,465 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@166c6d89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:12:48, skipping insertion in model container [2023-04-01 04:12:48,465 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:12:48" (1/1) ... [2023-04-01 04:12:48,470 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:12:48,531 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:12:48,638 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/Problem15_label03.c[2937,2950] [2023-04-01 04:12:48,952 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:12:48,962 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:12:48,973 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/Problem15_label03.c[2937,2950] [2023-04-01 04:12:49,096 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:12:49,108 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:12:49,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:12:49 WrapperNode [2023-04-01 04:12:49,108 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:12:49,109 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:12:49,109 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:12:49,110 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:12:49,117 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:12:49" (1/1) ... [2023-04-01 04:12:49,118 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:12:49" (1/1) ... [2023-04-01 04:12:49,147 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:12:49" (1/1) ... [2023-04-01 04:12:49,147 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:12:49" (1/1) ... [2023-04-01 04:12:49,184 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:12:49" (1/1) ... [2023-04-01 04:12:49,202 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:12:49" (1/1) ... [2023-04-01 04:12:49,220 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:12:49" (1/1) ... [2023-04-01 04:12:49,228 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:12:49" (1/1) ... [2023-04-01 04:12:49,244 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:12:49,245 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:12:49,245 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:12:49,245 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:12:49,246 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:12:49" (1/1) ... [2023-04-01 04:12:49,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:12:49,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:12:49,270 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 04:12:49,276 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 04:12:49,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:12:49,300 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:12:49,300 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:12:49,300 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:12:49,300 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:12:49,300 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:12:49,300 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:12:49,300 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:12:49,300 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:12:49,300 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:12:49,300 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:12:49,300 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:12:49,301 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:12:49,301 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:12:49,301 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:12:49,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:12:49,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:12:49,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:12:49,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:12:49,301 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:12:49,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:12:49,371 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:12:49,385 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:12:51,436 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:12:51,894 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:12:51,894 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:12:51,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:12:51 BoogieIcfgContainer [2023-04-01 04:12:51,896 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:12:51,898 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:12:51,898 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:12:51,900 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:12:51,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:12:48" (1/3) ... [2023-04-01 04:12:51,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b538243 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:12:51, skipping insertion in model container [2023-04-01 04:12:51,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:12:49" (2/3) ... [2023-04-01 04:12:51,901 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b538243 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:12:51, skipping insertion in model container [2023-04-01 04:12:51,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:12:51" (3/3) ... [2023-04-01 04:12:51,902 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label03.c [2023-04-01 04:12:51,914 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:12:51,914 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:12:51,947 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:12:51,952 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;@3bd080d6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:12:51,952 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:12:51,956 INFO L276 IsEmpty]: Start isEmpty. Operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 04:12:51,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:12:51,961 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:12:51,962 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:12:51,962 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:12:51,965 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:12:51,966 INFO L85 PathProgramCache]: Analyzing trace with hash 271514051, now seen corresponding path program 1 times [2023-04-01 04:12:51,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:12:51,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40125238] [2023-04-01 04:12:51,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:12:51,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:12:52,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:12:52,196 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 04:12:52,197 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:12:52,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40125238] [2023-04-01 04:12:52,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40125238] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:12:52,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:12:52,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:12:52,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624809558] [2023-04-01 04:12:52,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:12:52,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:12:52,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:12:52,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:12:52,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:12:52,223 INFO L87 Difference]: Start difference. First operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:12:53,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:12:53,685 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2023-04-01 04:12:53,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:12:53,689 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 04:12:53,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:12:53,705 INFO L225 Difference]: With dead ends: 718 [2023-04-01 04:12:53,705 INFO L226 Difference]: Without dead ends: 471 [2023-04-01 04:12:53,714 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 04:12:53,719 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 238 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-01 04:12:53,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 181 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-01 04:12:53,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-04-01 04:12:53,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 469. [2023-04-01 04:12:53,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 459 states have (on average 1.5969498910675382) internal successors, (733), 459 states have internal predecessors, (733), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 04:12:53,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 744 transitions. [2023-04-01 04:12:53,796 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 744 transitions. Word has length 11 [2023-04-01 04:12:53,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:12:53,797 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 744 transitions. [2023-04-01 04:12:53,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:12:53,797 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 744 transitions. [2023-04-01 04:12:53,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 04:12:53,798 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:12:53,798 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:12:53,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:12:53,799 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:12:53,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:12:53,799 INFO L85 PathProgramCache]: Analyzing trace with hash -483764099, now seen corresponding path program 1 times [2023-04-01 04:12:53,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:12:53,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505465453] [2023-04-01 04:12:53,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:12:53,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:12:53,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:12:53,898 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 04:12:53,898 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:12:53,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505465453] [2023-04-01 04:12:53,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505465453] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:12:53,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:12:53,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:12:53,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508765484] [2023-04-01 04:12:53,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:12:53,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:12:53,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:12:53,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:12:53,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:12:53,901 INFO L87 Difference]: Start difference. First operand 469 states and 744 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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 04:12:54,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:12:54,980 INFO L93 Difference]: Finished difference Result 1395 states and 2229 transitions. [2023-04-01 04:12:54,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:12:54,982 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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 21 [2023-04-01 04:12:54,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:12:54,985 INFO L225 Difference]: With dead ends: 1395 [2023-04-01 04:12:54,985 INFO L226 Difference]: Without dead ends: 931 [2023-04-01 04:12:54,987 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 04:12:54,988 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 243 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:12:54,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 169 Invalid, 927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-01 04:12:54,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2023-04-01 04:12:55,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 929. [2023-04-01 04:12:55,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 913 states have (on average 1.3723986856516976) internal successors, (1253), 913 states have internal predecessors, (1253), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2023-04-01 04:12:55,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 1276 transitions. [2023-04-01 04:12:55,008 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 1276 transitions. Word has length 21 [2023-04-01 04:12:55,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:12:55,009 INFO L495 AbstractCegarLoop]: Abstraction has 929 states and 1276 transitions. [2023-04-01 04:12:55,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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 04:12:55,009 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 1276 transitions. [2023-04-01 04:12:55,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-04-01 04:12:55,010 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:12:55,010 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:12:55,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:12:55,011 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:12:55,011 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:12:55,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1035768090, now seen corresponding path program 1 times [2023-04-01 04:12:55,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:12:55,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560102119] [2023-04-01 04:12:55,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:12:55,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:12:55,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:12:55,230 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-04-01 04:12:55,230 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:12:55,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560102119] [2023-04-01 04:12:55,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560102119] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:12:55,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:12:55,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:12:55,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119711569] [2023-04-01 04:12:55,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:12:55,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:12:55,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:12:55,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:12:55,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:12:55,232 INFO L87 Difference]: Start difference. First operand 929 states and 1276 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 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 04:12:56,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:12:56,954 INFO L93 Difference]: Finished difference Result 2350 states and 3356 transitions. [2023-04-01 04:12:56,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 04:12:56,955 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 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 67 [2023-04-01 04:12:56,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:12:56,960 INFO L225 Difference]: With dead ends: 2350 [2023-04-01 04:12:56,960 INFO L226 Difference]: Without dead ends: 1426 [2023-04-01 04:12:56,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-01 04:12:56,963 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 788 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1194 mSolverCounterSat, 347 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 788 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 347 IncrementalHoareTripleChecker+Valid, 1194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-04-01 04:12:56,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [788 Valid, 44 Invalid, 1541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [347 Valid, 1194 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-04-01 04:12:56,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1426 states. [2023-04-01 04:12:56,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1426 to 1403. [2023-04-01 04:12:56,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1403 states, 1374 states have (on average 1.294759825327511) internal successors, (1779), 1379 states have internal predecessors, (1779), 12 states have call successors, (12), 12 states have call predecessors, (12), 16 states have return successors, (33), 11 states have call predecessors, (33), 11 states have call successors, (33) [2023-04-01 04:12:56,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1403 states to 1403 states and 1824 transitions. [2023-04-01 04:12:56,999 INFO L78 Accepts]: Start accepts. Automaton has 1403 states and 1824 transitions. Word has length 67 [2023-04-01 04:12:57,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:12:57,001 INFO L495 AbstractCegarLoop]: Abstraction has 1403 states and 1824 transitions. [2023-04-01 04:12:57,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 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 04:12:57,001 INFO L276 IsEmpty]: Start isEmpty. Operand 1403 states and 1824 transitions. [2023-04-01 04:12:57,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-04-01 04:12:57,011 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:12:57,012 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:12:57,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:12:57,012 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:12:57,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:12:57,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1662588014, now seen corresponding path program 1 times [2023-04-01 04:12:57,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:12:57,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251647968] [2023-04-01 04:12:57,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:12:57,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:12:57,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:12:57,348 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-01 04:12:57,348 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:12:57,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251647968] [2023-04-01 04:12:57,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251647968] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:12:57,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:12:57,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:12:57,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739660574] [2023-04-01 04:12:57,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:12:57,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:12:57,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:12:57,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:12:57,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:12:57,350 INFO L87 Difference]: Start difference. First operand 1403 states and 1824 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 04:12:58,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:12:58,458 INFO L93 Difference]: Finished difference Result 3496 states and 4706 transitions. [2023-04-01 04:12:58,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:12:58,458 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 173 [2023-04-01 04:12:58,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:12:58,466 INFO L225 Difference]: With dead ends: 3496 [2023-04-01 04:12:58,466 INFO L226 Difference]: Without dead ends: 2098 [2023-04-01 04:12:58,469 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 04:12:58,470 INFO L413 NwaCegarLoop]: 413 mSDtfsCounter, 228 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:12:58,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 429 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-01 04:12:58,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2098 states. [2023-04-01 04:12:58,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2098 to 1868. [2023-04-01 04:12:58,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1868 states, 1831 states have (on average 1.251228836701256) internal successors, (2291), 1840 states have internal predecessors, (2291), 14 states have call successors, (14), 14 states have call predecessors, (14), 22 states have return successors, (57), 13 states have call predecessors, (57), 13 states have call successors, (57) [2023-04-01 04:12:58,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1868 states to 1868 states and 2362 transitions. [2023-04-01 04:12:58,506 INFO L78 Accepts]: Start accepts. Automaton has 1868 states and 2362 transitions. Word has length 173 [2023-04-01 04:12:58,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:12:58,507 INFO L495 AbstractCegarLoop]: Abstraction has 1868 states and 2362 transitions. [2023-04-01 04:12:58,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 04:12:58,507 INFO L276 IsEmpty]: Start isEmpty. Operand 1868 states and 2362 transitions. [2023-04-01 04:12:58,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2023-04-01 04:12:58,509 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:12:58,509 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:12:58,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 04:12:58,509 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:12:58,510 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:12:58,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1076778282, now seen corresponding path program 1 times [2023-04-01 04:12:58,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:12:58,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885536368] [2023-04-01 04:12:58,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:12:58,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:12:58,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:12:58,763 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:12:58,763 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:12:58,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885536368] [2023-04-01 04:12:58,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885536368] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:12:58,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378599843] [2023-04-01 04:12:58,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:12:58,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:12:58,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:12:58,767 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 04:12:58,796 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 04:12:58,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:12:58,895 INFO L262 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:12:58,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:12:58,966 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:12:58,966 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:12:59,111 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:12:59,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378599843] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:12:59,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1968241693] [2023-04-01 04:12:59,133 INFO L159 IcfgInterpreter]: Started Sifa with 148 locations of interest [2023-04-01 04:12:59,133 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:12:59,139 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:12:59,143 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:12:59,148 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:12:59,277 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 51 for LOIs [2023-04-01 04:12:59,523 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 17 [2023-04-01 04:12:59,652 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 12088 conjuctions. This might take some time... [2023-04-01 04:13:00,363 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 725 conjuctions. [2023-04-01 04:13:08,849 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 44