/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/Problem17_label35.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:23:24,279 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:23:24,281 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:23:24,298 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:23:24,299 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:23:24,299 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:23:24,300 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:23:24,301 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:23:24,302 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:23:24,303 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:23:24,304 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:23:24,304 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:23:24,305 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:23:24,305 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:23:24,306 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:23:24,307 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:23:24,307 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:23:24,308 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:23:24,309 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:23:24,310 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:23:24,311 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:23:24,312 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:23:24,312 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:23:24,313 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:23:24,315 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:23:24,315 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:23:24,315 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:23:24,316 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:23:24,316 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:23:24,317 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:23:24,317 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:23:24,317 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:23:24,318 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:23:24,318 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:23:24,319 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:23:24,319 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:23:24,319 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:23:24,320 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:23:24,320 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:23:24,320 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:23:24,321 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:23:24,337 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 04:23:24,351 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:23:24,351 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:23:24,351 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:23:24,352 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:23:24,352 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:23:24,352 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:23:24,352 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:23:24,366 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:23:24,366 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:23:24,366 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:23:24,366 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:23:24,366 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:23:24,366 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:23:24,366 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:23:24,366 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:23:24,366 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:23:24,366 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:23:24,366 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:23:24,367 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:23:24,367 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:23:24,367 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:23:24,367 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:23:24,367 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:23:24,368 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:23:24,368 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:23:24,368 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:23:24,368 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:23:24,368 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:23:24,368 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:23:24,368 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:23:24,368 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:23:24,368 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:23:24,368 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:23:24,368 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:23:24,369 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:23:24,369 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:23:24,369 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:23:24,369 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:23:24,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:23:24,369 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:23:24,369 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:23:24,369 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:23:24,519 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:23:24,535 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:23:24,537 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:23:24,538 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:23:24,550 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:23:24,551 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label35.c [2023-04-01 04:23:25,792 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:23:26,132 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:23:26,132 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label35.c [2023-04-01 04:23:26,152 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/798707f84/ec3aacd8373c435fb0a6f89f3700c358/FLAG87d67e507 [2023-04-01 04:23:26,166 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/798707f84/ec3aacd8373c435fb0a6f89f3700c358 [2023-04-01 04:23:26,167 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:23:26,169 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:23:26,171 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:23:26,171 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:23:26,174 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:23:26,174 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:23:26" (1/1) ... [2023-04-01 04:23:26,175 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39666235 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:23:26, skipping insertion in model container [2023-04-01 04:23:26,175 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:23:26" (1/1) ... [2023-04-01 04:23:26,180 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:23:26,248 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:23:26,398 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/Problem17_label35.c[1267,1280] [2023-04-01 04:23:26,847 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:23:26,854 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:23:26,862 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/Problem17_label35.c[1267,1280] [2023-04-01 04:23:27,092 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:23:27,105 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:23:27,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:23:27 WrapperNode [2023-04-01 04:23:27,106 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:23:27,107 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:23:27,107 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:23:27,107 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:23:27,115 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:23:27" (1/1) ... [2023-04-01 04:23:27,115 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:23:27" (1/1) ... [2023-04-01 04:23:27,155 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:23:27" (1/1) ... [2023-04-01 04:23:27,155 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:23:27" (1/1) ... [2023-04-01 04:23:27,227 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:23:27" (1/1) ... [2023-04-01 04:23:27,250 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:23:27" (1/1) ... [2023-04-01 04:23:27,298 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:23:27" (1/1) ... [2023-04-01 04:23:27,313 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:23:27" (1/1) ... [2023-04-01 04:23:27,391 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:23:27,392 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:23:27,392 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:23:27,392 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:23:27,394 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:23:27" (1/1) ... [2023-04-01 04:23:27,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:23:27,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:23:27,431 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 04:23:27,433 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 04:23:27,483 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:23:27,483 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:23:27,484 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:23:27,484 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:23:27,484 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:23:27,484 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:23:27,484 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:23:27,484 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:23:27,484 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:23:27,484 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:23:27,484 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:23:27,484 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:23:27,484 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:23:27,484 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:23:27,484 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:23:27,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:23:27,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:23:27,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:23:27,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:23:27,485 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:23:27,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:23:27,576 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:23:27,577 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:23:30,025 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:23:38,969 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:23:38,969 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:23:38,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:23:38 BoogieIcfgContainer [2023-04-01 04:23:38,972 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:23:38,976 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:23:38,976 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:23:38,979 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:23:38,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:23:26" (1/3) ... [2023-04-01 04:23:38,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5781a235 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:23:38, skipping insertion in model container [2023-04-01 04:23:38,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:23:27" (2/3) ... [2023-04-01 04:23:38,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5781a235 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:23:38, skipping insertion in model container [2023-04-01 04:23:38,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:23:38" (3/3) ... [2023-04-01 04:23:38,982 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label35.c [2023-04-01 04:23:38,997 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:23:38,997 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:23:39,057 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:23:39,063 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;@3bac9fd6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:23:39,063 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:23:39,069 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 04:23:39,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:23:39,074 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:23:39,074 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:23:39,075 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:23:39,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:23:39,080 INFO L85 PathProgramCache]: Analyzing trace with hash -2084387679, now seen corresponding path program 1 times [2023-04-01 04:23:39,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:23:39,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013788255] [2023-04-01 04:23:39,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:23:39,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:23:39,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:23:39,319 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 04:23:39,319 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:23:39,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013788255] [2023-04-01 04:23:39,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013788255] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:23:39,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:23:39,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:23:39,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65307830] [2023-04-01 04:23:39,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:23:39,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:23:39,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:23:39,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:23:39,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:23:39,378 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 04:23:42,838 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-01 04:23:42,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:23:42,906 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2023-04-01 04:23:42,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:23:42,908 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 04:23:42,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:23:42,939 INFO L225 Difference]: With dead ends: 718 [2023-04-01 04:23:42,940 INFO L226 Difference]: Without dead ends: 471 [2023-04-01 04:23:42,944 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 04:23:42,949 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 241 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 170 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-04-01 04:23:42,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 60 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 789 Invalid, 1 Unknown, 0 Unchecked, 3.4s Time] [2023-04-01 04:23:42,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-04-01 04:23:43,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 464. [2023-04-01 04:23:43,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 454 states have (on average 1.8986784140969164) internal successors, (862), 454 states have internal predecessors, (862), 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 04:23:43,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 873 transitions. [2023-04-01 04:23:43,085 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 873 transitions. Word has length 11 [2023-04-01 04:23:43,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:23:43,085 INFO L495 AbstractCegarLoop]: Abstraction has 464 states and 873 transitions. [2023-04-01 04:23:43,085 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 04:23:43,085 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 873 transitions. [2023-04-01 04:23:43,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 04:23:43,095 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:23:43,095 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 04:23:43,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:23:43,096 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:23:43,096 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:23:43,096 INFO L85 PathProgramCache]: Analyzing trace with hash 2097991204, now seen corresponding path program 1 times [2023-04-01 04:23:43,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:23:43,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158205455] [2023-04-01 04:23:43,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:23:43,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:23:43,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:23:43,506 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 04:23:43,507 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:23:43,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158205455] [2023-04-01 04:23:43,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158205455] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:23:43,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:23:43,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:23:43,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305558751] [2023-04-01 04:23:43,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:23:43,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:23:43,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:23:43,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:23:43,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:23:43,509 INFO L87 Difference]: Start difference. First operand 464 states and 873 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 04:23:45,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:23:45,477 INFO L93 Difference]: Finished difference Result 1398 states and 2661 transitions. [2023-04-01 04:23:45,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 04:23:45,481 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 21 [2023-04-01 04:23:45,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:23:45,488 INFO L225 Difference]: With dead ends: 1398 [2023-04-01 04:23:45,489 INFO L226 Difference]: Without dead ends: 939 [2023-04-01 04:23:45,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 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 04:23:45,491 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 710 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1501 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 710 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 1501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-04-01 04:23:45,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [710 Valid, 54 Invalid, 1718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 1501 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-04-01 04:23:45,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2023-04-01 04:23:45,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 869. [2023-04-01 04:23:45,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 851 states have (on average 1.6122209165687427) internal successors, (1372), 855 states have internal predecessors, (1372), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) [2023-04-01 04:23:45,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 1405 transitions. [2023-04-01 04:23:45,540 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 1405 transitions. Word has length 21 [2023-04-01 04:23:45,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:23:45,541 INFO L495 AbstractCegarLoop]: Abstraction has 869 states and 1405 transitions. [2023-04-01 04:23:45,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 04:23:45,541 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 1405 transitions. [2023-04-01 04:23:45,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 04:23:45,541 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:23:45,541 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:23:45,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:23:45,542 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:23:45,542 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:23:45,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1303811232, now seen corresponding path program 1 times [2023-04-01 04:23:45,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:23:45,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393103589] [2023-04-01 04:23:45,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:23:45,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:23:45,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:23:45,621 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 04:23:45,622 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:23:45,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393103589] [2023-04-01 04:23:45,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393103589] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:23:45,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:23:45,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:23:45,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819539853] [2023-04-01 04:23:45,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:23:45,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:23:45,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:23:45,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:23:45,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:23:45,624 INFO L87 Difference]: Start difference. First operand 869 states and 1405 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 04:23:47,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:23:47,437 INFO L93 Difference]: Finished difference Result 2642 states and 4335 transitions. [2023-04-01 04:23:47,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:23:47,438 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 23 [2023-04-01 04:23:47,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:23:47,448 INFO L225 Difference]: With dead ends: 2642 [2023-04-01 04:23:47,448 INFO L226 Difference]: Without dead ends: 1778 [2023-04-01 04:23:47,449 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 04:23:47,453 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 736 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1280 mSolverCounterSat, 465 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 736 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 465 IncrementalHoareTripleChecker+Valid, 1280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-01 04:23:47,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [736 Valid, 46 Invalid, 1745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [465 Valid, 1280 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-01 04:23:47,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1778 states. [2023-04-01 04:23:47,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1778 to 1112. [2023-04-01 04:23:47,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1084 states have (on average 1.4833948339483394) internal successors, (1608), 1094 states have internal predecessors, (1608), 9 states have call successors, (9), 9 states have call predecessors, (9), 18 states have return successors, (54), 8 states have call predecessors, (54), 8 states have call successors, (54) [2023-04-01 04:23:47,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 1671 transitions. [2023-04-01 04:23:47,516 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 1671 transitions. Word has length 23 [2023-04-01 04:23:47,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:23:47,517 INFO L495 AbstractCegarLoop]: Abstraction has 1112 states and 1671 transitions. [2023-04-01 04:23:47,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 04:23:47,518 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 1671 transitions. [2023-04-01 04:23:47,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-01 04:23:47,518 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:23:47,518 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] [2023-04-01 04:23:47,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:23:47,519 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:23:47,519 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:23:47,519 INFO L85 PathProgramCache]: Analyzing trace with hash 936550956, now seen corresponding path program 1 times [2023-04-01 04:23:47,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:23:47,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957538797] [2023-04-01 04:23:47,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:23:47,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:23:47,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:23:47,660 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 04:23:47,660 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:23:47,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957538797] [2023-04-01 04:23:47,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957538797] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:23:47,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:23:47,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:23:47,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500921983] [2023-04-01 04:23:47,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:23:47,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:23:47,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:23:47,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:23:47,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:23:47,663 INFO L87 Difference]: Start difference. First operand 1112 states and 1671 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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 04:23:48,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:23:48,956 INFO L93 Difference]: Finished difference Result 2921 states and 4535 transitions. [2023-04-01 04:23:48,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:23:48,959 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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 26 [2023-04-01 04:23:48,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:23:48,966 INFO L225 Difference]: With dead ends: 2921 [2023-04-01 04:23:48,966 INFO L226 Difference]: Without dead ends: 1814 [2023-04-01 04:23:48,971 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 04:23:48,975 INFO L413 NwaCegarLoop]: 373 mSDtfsCounter, 248 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-01 04:23:48,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 388 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-01 04:23:48,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1814 states. [2023-04-01 04:23:49,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1814 to 1597. [2023-04-01 04:23:49,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1597 states, 1558 states have (on average 1.4152759948652118) internal successors, (2205), 1573 states have internal predecessors, (2205), 12 states have call successors, (12), 12 states have call predecessors, (12), 26 states have return successors, (113), 11 states have call predecessors, (113), 11 states have call successors, (113) [2023-04-01 04:23:49,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1597 states to 1597 states and 2330 transitions. [2023-04-01 04:23:49,016 INFO L78 Accepts]: Start accepts. Automaton has 1597 states and 2330 transitions. Word has length 26 [2023-04-01 04:23:49,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:23:49,016 INFO L495 AbstractCegarLoop]: Abstraction has 1597 states and 2330 transitions. [2023-04-01 04:23:49,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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 04:23:49,017 INFO L276 IsEmpty]: Start isEmpty. Operand 1597 states and 2330 transitions. [2023-04-01 04:23:49,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-01 04:23:49,022 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:23:49,022 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2023-04-01 04:23:49,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 04:23:49,022 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:23:49,023 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:23:49,023 INFO L85 PathProgramCache]: Analyzing trace with hash 2129803579, now seen corresponding path program 1 times [2023-04-01 04:23:49,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:23:49,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323670348] [2023-04-01 04:23:49,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:23:49,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:23:49,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:23:49,154 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:23:49,154 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:23:49,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323670348] [2023-04-01 04:23:49,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323670348] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:23:49,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270394411] [2023-04-01 04:23:49,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:23:49,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:23:49,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:23:49,171 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 04:23:49,172 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 04:23:49,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:23:49,289 INFO L262 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:23:49,293 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:23:49,359 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:23:49,360 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:23:49,476 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:23:49,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270394411] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:23:49,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [299768954] [2023-04-01 04:23:49,490 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2023-04-01 04:23:49,490 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:23:49,493 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:23:49,496 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:23:49,496 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:23:49,602 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 50 for LOIs [2023-04-01 04:23:49,810 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 60