/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/eca-rers2012/Problem13_label33.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 10:08:46,302 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 10:08:46,303 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 10:08:46,326 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 10:08:46,327 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 10:08:46,327 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 10:08:46,328 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 10:08:46,329 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 10:08:46,330 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 10:08:46,331 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 10:08:46,331 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 10:08:46,332 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 10:08:46,332 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 10:08:46,333 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 10:08:46,333 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 10:08:46,334 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 10:08:46,335 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 10:08:46,335 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 10:08:46,336 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 10:08:46,337 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 10:08:46,338 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 10:08:46,339 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 10:08:46,339 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 10:08:46,340 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 10:08:46,342 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 10:08:46,344 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 10:08:46,345 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 10:08:46,345 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 10:08:46,346 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 10:08:46,347 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 10:08:46,347 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 10:08:46,347 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 10:08:46,347 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 10:08:46,348 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 10:08:46,348 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 10:08:46,349 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 10:08:46,349 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 10:08:46,373 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 10:08:46,374 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 10:08:46,374 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 10:08:46,374 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 10:08:46,374 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 10:08:46,375 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 10:08:46,375 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 10:08:46,375 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 10:08:46,375 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 10:08:46,375 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 10:08:46,375 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 10:08:46,375 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 10:08:46,375 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 10:08:46,375 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 10:08:46,376 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 10:08:46,376 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 10:08:46,376 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 10:08:46,376 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 10:08:46,376 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 10:08:46,376 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 10:08:46,377 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 10:08:46,377 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 10:08:46,377 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 10:08:46,377 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 10:08:46,377 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 10:08:46,377 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 10:08:46,377 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 10:08:46,377 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 10:08:46,377 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 10:08:46,378 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 10:08:46,378 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 10:08:46,378 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 10:08:46,378 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:08:46,378 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 10:08:46,378 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 10:08:46,378 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 10:08:46,378 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 10:08:46,379 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 10:08:46,379 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 10:08:46,379 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 10:08:46,379 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 10:08:46,379 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 10:08:46,538 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 10:08:46,550 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 10:08:46,552 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 10:08:46,553 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 10:08:46,553 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 10:08:46,554 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label33.c [2023-04-01 10:08:47,530 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 10:08:47,890 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 10:08:47,890 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label33.c [2023-04-01 10:08:47,909 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/894b61546/4cce224f159945429c7e9d01967ddd0d/FLAG06733db5e [2023-04-01 10:08:47,919 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/894b61546/4cce224f159945429c7e9d01967ddd0d [2023-04-01 10:08:47,921 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 10:08:47,922 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 10:08:47,924 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 10:08:47,924 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 10:08:47,926 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 10:08:47,927 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:08:47" (1/1) ... [2023-04-01 10:08:47,928 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4743b3c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:08:47, skipping insertion in model container [2023-04-01 10:08:47,928 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:08:47" (1/1) ... [2023-04-01 10:08:47,932 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 10:08:48,030 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 10:08:48,239 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/Problem13_label33.c[5177,5190] [2023-04-01 10:08:48,804 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:08:48,812 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 10:08:48,831 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/Problem13_label33.c[5177,5190] [2023-04-01 10:08:49,165 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:08:49,181 INFO L208 MainTranslator]: Completed translation [2023-04-01 10:08:49,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:08:49 WrapperNode [2023-04-01 10:08:49,183 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 10:08:49,185 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 10:08:49,185 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 10:08:49,185 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 10:08:49,193 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:08:49" (1/1) ... [2023-04-01 10:08:49,193 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:08:49" (1/1) ... [2023-04-01 10:08:49,251 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:08:49" (1/1) ... [2023-04-01 10:08:49,252 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:08:49" (1/1) ... [2023-04-01 10:08:49,345 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:08:49" (1/1) ... [2023-04-01 10:08:49,360 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:08:49" (1/1) ... [2023-04-01 10:08:49,387 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:08:49" (1/1) ... [2023-04-01 10:08:49,399 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:08:49" (1/1) ... [2023-04-01 10:08:49,425 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 10:08:49,426 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 10:08:49,427 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 10:08:49,427 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 10:08:49,428 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:08:49" (1/1) ... [2023-04-01 10:08:49,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:08:49,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:08:49,550 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 10:08:49,569 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 10:08:49,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 10:08:49,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 10:08:49,578 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 10:08:49,578 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 10:08:49,578 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 10:08:49,578 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 10:08:49,578 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 10:08:49,578 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 10:08:49,578 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 10:08:49,578 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 10:08:49,578 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 10:08:49,578 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 10:08:49,579 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 10:08:49,579 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 10:08:49,579 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 10:08:49,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 10:08:49,579 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 10:08:49,579 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 10:08:49,579 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 10:08:49,579 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 10:08:49,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 10:08:49,579 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 10:08:49,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 10:08:49,580 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 10:08:49,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 10:08:49,647 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 10:08:49,649 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 10:08:53,690 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 10:08:55,931 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 10:08:55,931 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 10:08:55,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:08:55 BoogieIcfgContainer [2023-04-01 10:08:55,934 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 10:08:55,935 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 10:08:55,935 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 10:08:55,937 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 10:08:55,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:08:47" (1/3) ... [2023-04-01 10:08:55,938 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d2eb2d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:08:55, skipping insertion in model container [2023-04-01 10:08:55,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:08:49" (2/3) ... [2023-04-01 10:08:55,938 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d2eb2d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:08:55, skipping insertion in model container [2023-04-01 10:08:55,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:08:55" (3/3) ... [2023-04-01 10:08:55,939 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label33.c [2023-04-01 10:08:55,952 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 10:08:55,953 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 10:08:56,001 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 10:08:56,006 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;@affc54c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 10:08:56,006 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 10:08:56,012 INFO L276 IsEmpty]: Start isEmpty. Operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 10:08:56,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 10:08:56,017 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:08:56,017 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:08:56,018 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:08:56,021 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:08:56,021 INFO L85 PathProgramCache]: Analyzing trace with hash -330932684, now seen corresponding path program 1 times [2023-04-01 10:08:56,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:08:56,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936860159] [2023-04-01 10:08:56,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:08:56,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:08:56,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:08:56,297 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 10:08:56,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:08:56,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936860159] [2023-04-01 10:08:56,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936860159] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:08:56,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:08:56,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:08:56,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269266006] [2023-04-01 10:08:56,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:08:56,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:08:56,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:08:56,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:08:56,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:08:56,333 INFO L87 Difference]: Start difference. First operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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 10:08:59,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:08:59,290 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-04-01 10:08:59,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:08:59,292 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 10:08:59,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:08:59,308 INFO L225 Difference]: With dead ends: 2068 [2023-04-01 10:08:59,308 INFO L226 Difference]: Without dead ends: 1371 [2023-04-01 10:08:59,315 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 10:08:59,318 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 713 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2343 mSolverCounterSat, 468 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 713 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 2811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 468 IncrementalHoareTripleChecker+Valid, 2343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-04-01 10:08:59,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [713 Valid, 215 Invalid, 2811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [468 Valid, 2343 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-04-01 10:08:59,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-04-01 10:08:59,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1367. [2023-04-01 10:08:59,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1367 states, 1349 states have (on average 1.8465530022238696) internal successors, (2491), 1349 states have internal predecessors, (2491), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2023-04-01 10:08:59,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1367 states to 1367 states and 2514 transitions. [2023-04-01 10:08:59,392 INFO L78 Accepts]: Start accepts. Automaton has 1367 states and 2514 transitions. Word has length 11 [2023-04-01 10:08:59,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:08:59,392 INFO L495 AbstractCegarLoop]: Abstraction has 1367 states and 2514 transitions. [2023-04-01 10:08:59,392 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 10:08:59,392 INFO L276 IsEmpty]: Start isEmpty. Operand 1367 states and 2514 transitions. [2023-04-01 10:08:59,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 10:08:59,393 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:08:59,393 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 10:08:59,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 10:08:59,394 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:08:59,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:08:59,394 INFO L85 PathProgramCache]: Analyzing trace with hash 373837021, now seen corresponding path program 1 times [2023-04-01 10:08:59,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:08:59,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702437860] [2023-04-01 10:08:59,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:08:59,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:08:59,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:08:59,493 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 10:08:59,493 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:08:59,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702437860] [2023-04-01 10:08:59,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702437860] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:08:59,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:08:59,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:08:59,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611396210] [2023-04-01 10:08:59,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:08:59,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:08:59,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:08:59,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:08:59,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:08:59,496 INFO L87 Difference]: Start difference. First operand 1367 states and 2514 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 10:09:03,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:09:03,467 INFO L93 Difference]: Finished difference Result 4166 states and 7684 transitions. [2023-04-01 10:09:03,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 10:09:03,469 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 10:09:03,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:09:03,480 INFO L225 Difference]: With dead ends: 4166 [2023-04-01 10:09:03,481 INFO L226 Difference]: Without dead ends: 2804 [2023-04-01 10:09:03,488 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 10:09:03,491 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 2397 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 3932 mSolverCounterSat, 1158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2397 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 5090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1158 IncrementalHoareTripleChecker+Valid, 3932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-04-01 10:09:03,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2397 Valid, 111 Invalid, 5090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1158 Valid, 3932 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2023-04-01 10:09:03,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2804 states. [2023-04-01 10:09:03,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2804 to 2742. [2023-04-01 10:09:03,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2742 states, 2700 states have (on average 1.5640740740740742) internal successors, (4223), 2704 states have internal predecessors, (4223), 15 states have call successors, (15), 15 states have call predecessors, (15), 26 states have return successors, (74), 22 states have call predecessors, (74), 14 states have call successors, (74) [2023-04-01 10:09:03,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2742 states to 2742 states and 4312 transitions. [2023-04-01 10:09:03,594 INFO L78 Accepts]: Start accepts. Automaton has 2742 states and 4312 transitions. Word has length 21 [2023-04-01 10:09:03,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:09:03,594 INFO L495 AbstractCegarLoop]: Abstraction has 2742 states and 4312 transitions. [2023-04-01 10:09:03,595 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 10:09:03,595 INFO L276 IsEmpty]: Start isEmpty. Operand 2742 states and 4312 transitions. [2023-04-01 10:09:03,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 10:09:03,595 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:09:03,595 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 10:09:03,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 10:09:03,596 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:09:03,596 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:09:03,596 INFO L85 PathProgramCache]: Analyzing trace with hash -119617031, now seen corresponding path program 1 times [2023-04-01 10:09:03,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:09:03,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789195252] [2023-04-01 10:09:03,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:09:03,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:09:03,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:09:03,713 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 10:09:03,713 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:09:03,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789195252] [2023-04-01 10:09:03,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789195252] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:09:03,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:09:03,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:09:03,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859277747] [2023-04-01 10:09:03,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:09:03,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:09:03,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:09:03,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:09:03,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:09:03,715 INFO L87 Difference]: Start difference. First operand 2742 states and 4312 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 10:09:08,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:09:08,234 INFO L93 Difference]: Finished difference Result 8492 states and 13675 transitions. [2023-04-01 10:09:08,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 10:09:08,238 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 10:09:08,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:09:08,258 INFO L225 Difference]: With dead ends: 8492 [2023-04-01 10:09:08,258 INFO L226 Difference]: Without dead ends: 5755 [2023-04-01 10:09:08,265 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 10:09:08,265 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 2173 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 4957 mSolverCounterSat, 852 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2173 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 5809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 852 IncrementalHoareTripleChecker+Valid, 4957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-04-01 10:09:08,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2173 Valid, 128 Invalid, 5809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [852 Valid, 4957 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-04-01 10:09:08,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5755 states. [2023-04-01 10:09:08,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5755 to 5619. [2023-04-01 10:09:08,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5619 states, 5483 states have (on average 1.3913915739558635) internal successors, (7629), 5514 states have internal predecessors, (7629), 27 states have call successors, (27), 27 states have call predecessors, (27), 108 states have return successors, (423), 77 states have call predecessors, (423), 26 states have call successors, (423) [2023-04-01 10:09:08,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5619 states to 5619 states and 8079 transitions. [2023-04-01 10:09:08,376 INFO L78 Accepts]: Start accepts. Automaton has 5619 states and 8079 transitions. Word has length 23 [2023-04-01 10:09:08,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:09:08,377 INFO L495 AbstractCegarLoop]: Abstraction has 5619 states and 8079 transitions. [2023-04-01 10:09:08,377 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 10:09:08,377 INFO L276 IsEmpty]: Start isEmpty. Operand 5619 states and 8079 transitions. [2023-04-01 10:09:08,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 10:09:08,377 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:09:08,377 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:09:08,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 10:09:08,378 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:09:08,378 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:09:08,378 INFO L85 PathProgramCache]: Analyzing trace with hash 28549005, now seen corresponding path program 1 times [2023-04-01 10:09:08,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:09:08,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474583273] [2023-04-01 10:09:08,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:09:08,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:09:08,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:09:08,552 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 10:09:08,552 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:09:08,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474583273] [2023-04-01 10:09:08,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474583273] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:09:08,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:09:08,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:09:08,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313287947] [2023-04-01 10:09:08,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:09:08,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:09:08,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:09:08,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:09:08,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:09:08,554 INFO L87 Difference]: Start difference. First operand 5619 states and 8079 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 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 10:09:12,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:09:12,508 INFO L93 Difference]: Finished difference Result 17146 states and 26271 transitions. [2023-04-01 10:09:12,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 10:09:12,508 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 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 29 [2023-04-01 10:09:12,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:09:12,551 INFO L225 Difference]: With dead ends: 17146 [2023-04-01 10:09:12,551 INFO L226 Difference]: Without dead ends: 11532 [2023-04-01 10:09:12,562 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 10:09:12,563 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 2183 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 4808 mSolverCounterSat, 999 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2183 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 5807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 999 IncrementalHoareTripleChecker+Valid, 4808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-04-01 10:09:12,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2183 Valid, 112 Invalid, 5807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [999 Valid, 4808 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-04-01 10:09:12,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11532 states. [2023-04-01 10:09:12,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11532 to 11126. [2023-04-01 10:09:12,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11126 states, 10801 states have (on average 1.360799925932784) internal successors, (14698), 10895 states have internal predecessors, (14698), 51 states have call successors, (51), 51 states have call predecessors, (51), 273 states have return successors, (1656), 179 states have call predecessors, (1656), 50 states have call successors, (1656) [2023-04-01 10:09:12,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11126 states to 11126 states and 16405 transitions. [2023-04-01 10:09:12,818 INFO L78 Accepts]: Start accepts. Automaton has 11126 states and 16405 transitions. Word has length 29 [2023-04-01 10:09:12,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:09:12,819 INFO L495 AbstractCegarLoop]: Abstraction has 11126 states and 16405 transitions. [2023-04-01 10:09:12,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 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 10:09:12,819 INFO L276 IsEmpty]: Start isEmpty. Operand 11126 states and 16405 transitions. [2023-04-01 10:09:12,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-01 10:09:12,820 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:09:12,820 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:09:12,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 10:09:12,821 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:09:12,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:09:12,821 INFO L85 PathProgramCache]: Analyzing trace with hash 931328173, now seen corresponding path program 1 times [2023-04-01 10:09:12,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:09:12,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92503946] [2023-04-01 10:09:12,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:09:12,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:09:12,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:09:12,920 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 10:09:12,920 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:09:12,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92503946] [2023-04-01 10:09:12,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92503946] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:09:12,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:09:12,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:09:12,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021689864] [2023-04-01 10:09:12,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:09:12,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:09:12,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:09:12,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:09:12,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:09:12,923 INFO L87 Difference]: Start difference. First operand 11126 states and 16405 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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 10:09:15,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:09:15,833 INFO L93 Difference]: Finished difference Result 23820 states and 35982 transitions. [2023-04-01 10:09:15,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:09:15,849 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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 45 [2023-04-01 10:09:15,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:09:15,899 INFO L225 Difference]: With dead ends: 23820 [2023-04-01 10:09:15,899 INFO L226 Difference]: Without dead ends: 12699 [2023-04-01 10:09:15,925 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 10:09:15,927 INFO L413 NwaCegarLoop]: 1139 mSDtfsCounter, 694 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 2175 mSolverCounterSat, 600 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 694 SdHoareTripleChecker+Valid, 1167 SdHoareTripleChecker+Invalid, 2775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 600 IncrementalHoareTripleChecker+Valid, 2175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-04-01 10:09:15,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [694 Valid, 1167 Invalid, 2775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [600 Valid, 2175 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-04-01 10:09:15,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12699 states. [2023-04-01 10:09:16,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12699 to 12375. [2023-04-01 10:09:16,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12375 states, 12038 states have (on average 1.2752118292075096) internal successors, (15351), 12132 states have internal predecessors, (15351), 57 states have call successors, (57), 57 states have call predecessors, (57), 279 states have return successors, (1633), 185 states have call predecessors, (1633), 56 states have call successors, (1633) [2023-04-01 10:09:16,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12375 states to 12375 states and 17041 transitions. [2023-04-01 10:09:16,213 INFO L78 Accepts]: Start accepts. Automaton has 12375 states and 17041 transitions. Word has length 45 [2023-04-01 10:09:16,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:09:16,214 INFO L495 AbstractCegarLoop]: Abstraction has 12375 states and 17041 transitions. [2023-04-01 10:09:16,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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 10:09:16,214 INFO L276 IsEmpty]: Start isEmpty. Operand 12375 states and 17041 transitions. [2023-04-01 10:09:16,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-04-01 10:09:16,219 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:09:16,220 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:09:16,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 10:09:16,220 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:09:16,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:09:16,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1696631281, now seen corresponding path program 1 times [2023-04-01 10:09:16,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:09:16,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77144203] [2023-04-01 10:09:16,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:09:16,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:09:16,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:09:16,332 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 10:09:16,332 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:09:16,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77144203] [2023-04-01 10:09:16,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77144203] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:09:16,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:09:16,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:09:16,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176430459] [2023-04-01 10:09:16,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:09:16,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:09:16,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:09:16,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:09:16,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:09:16,335 INFO L87 Difference]: Start difference. First operand 12375 states and 17041 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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 10:09:19,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:09:19,192 INFO L93 Difference]: Finished difference Result 30288 states and 42899 transitions. [2023-04-01 10:09:19,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:09:19,195 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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 52 [2023-04-01 10:09:19,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:09:19,245 INFO L225 Difference]: With dead ends: 30288 [2023-04-01 10:09:19,245 INFO L226 Difference]: Without dead ends: 17918 [2023-04-01 10:09:19,269 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 10:09:19,269 INFO L413 NwaCegarLoop]: 1155 mSDtfsCounter, 689 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 2172 mSolverCounterSat, 528 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 689 SdHoareTripleChecker+Valid, 1181 SdHoareTripleChecker+Invalid, 2700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 528 IncrementalHoareTripleChecker+Valid, 2172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-04-01 10:09:19,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [689 Valid, 1181 Invalid, 2700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [528 Valid, 2172 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-04-01 10:09:19,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17918 states. [2023-04-01 10:09:19,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17918 to 17810. [2023-04-01 10:09:19,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17810 states, 17355 states have (on average 1.224949582252953) internal successors, (21259), 17482 states have internal predecessors, (21259), 81 states have call successors, (81), 81 states have call predecessors, (81), 373 states have return successors, (2651), 246 states have call predecessors, (2651), 80 states have call successors, (2651) [2023-04-01 10:09:19,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17810 states to 17810 states and 23991 transitions. [2023-04-01 10:09:19,760 INFO L78 Accepts]: Start accepts. Automaton has 17810 states and 23991 transitions. Word has length 52 [2023-04-01 10:09:19,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:09:19,761 INFO L495 AbstractCegarLoop]: Abstraction has 17810 states and 23991 transitions. [2023-04-01 10:09:19,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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 10:09:19,761 INFO L276 IsEmpty]: Start isEmpty. Operand 17810 states and 23991 transitions. [2023-04-01 10:09:19,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-04-01 10:09:19,764 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:09:19,764 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 10:09:19,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 10:09:19,764 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:09:19,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:09:19,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1050111783, now seen corresponding path program 1 times [2023-04-01 10:09:19,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:09:19,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072815304] [2023-04-01 10:09:19,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:09:19,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:09:19,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:09:19,942 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 43 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 10:09:19,942 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:09:19,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072815304] [2023-04-01 10:09:19,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072815304] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:09:19,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090613268] [2023-04-01 10:09:19,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:09:19,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:09:19,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:09:19,946 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 10:09:19,996 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 10:09:20,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:09:20,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-01 10:09:20,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:09:20,233 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-04-01 10:09:20,234 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:09:20,444 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-04-01 10:09:20,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090613268] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 10:09:20,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 10:09:20,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 9 [2023-04-01 10:09:20,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163421212] [2023-04-01 10:09:20,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:09:20,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:09:20,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:09:20,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:09:20,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-04-01 10:09:20,445 INFO L87 Difference]: Start difference. First operand 17810 states and 23991 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 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 10:09:24,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:09:24,179 INFO L93 Difference]: Finished difference Result 53834 states and 75439 transitions. [2023-04-01 10:09:24,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 10:09:24,190 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 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 77 [2023-04-01 10:09:24,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:09:24,282 INFO L225 Difference]: With dead ends: 53834 [2023-04-01 10:09:24,283 INFO L226 Difference]: Without dead ends: 36029 [2023-04-01 10:09:24,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 146 SyntacticMatches, 7 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-04-01 10:09:24,324 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 2503 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 3653 mSolverCounterSat, 997 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2503 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 4650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 997 IncrementalHoareTripleChecker+Valid, 3653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-04-01 10:09:24,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2503 Valid, 81 Invalid, 4650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [997 Valid, 3653 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-04-01 10:09:24,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36029 states. [2023-04-01 10:09:24,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36029 to 35228. [2023-04-01 10:09:24,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35228 states, 34181 states have (on average 1.1784032064597292) internal successors, (40279), 34509 states have internal predecessors, (40279), 157 states have call successors, (157), 157 states have call predecessors, (157), 889 states have return successors, (6898), 561 states have call predecessors, (6898), 156 states have call successors, (6898) [2023-04-01 10:09:24,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35228 states to 35228 states and 47334 transitions. [2023-04-01 10:09:24,931 INFO L78 Accepts]: Start accepts. Automaton has 35228 states and 47334 transitions. Word has length 77 [2023-04-01 10:09:24,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:09:24,932 INFO L495 AbstractCegarLoop]: Abstraction has 35228 states and 47334 transitions. [2023-04-01 10:09:24,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 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 10:09:24,932 INFO L276 IsEmpty]: Start isEmpty. Operand 35228 states and 47334 transitions. [2023-04-01 10:09:24,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-04-01 10:09:24,934 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:09:24,934 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, 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 10:09:24,942 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 10:09:25,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:09:25,142 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:09:25,143 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:09:25,143 INFO L85 PathProgramCache]: Analyzing trace with hash 279167626, now seen corresponding path program 1 times [2023-04-01 10:09:25,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:09:25,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512900805] [2023-04-01 10:09:25,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:09:25,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:09:25,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:09:25,267 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-04-01 10:09:25,268 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:09:25,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512900805] [2023-04-01 10:09:25,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512900805] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:09:25,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:09:25,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:09:25,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84310537] [2023-04-01 10:09:25,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:09:25,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:09:25,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:09:25,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:09:25,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:09:25,269 INFO L87 Difference]: Start difference. First operand 35228 states and 47334 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 10:09:28,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:09:28,957 INFO L93 Difference]: Finished difference Result 85658 states and 117650 transitions. [2023-04-01 10:09:28,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:09:28,958 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 93 [2023-04-01 10:09:28,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:09:29,109 INFO L225 Difference]: With dead ends: 85658 [2023-04-01 10:09:29,110 INFO L226 Difference]: Without dead ends: 50435 [2023-04-01 10:09:29,152 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 10:09:29,154 INFO L413 NwaCegarLoop]: 1040 mSDtfsCounter, 789 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 2090 mSolverCounterSat, 686 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 789 SdHoareTripleChecker+Valid, 1068 SdHoareTripleChecker+Invalid, 2776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 686 IncrementalHoareTripleChecker+Valid, 2090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-04-01 10:09:29,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [789 Valid, 1068 Invalid, 2776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [686 Valid, 2090 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-04-01 10:09:29,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50435 states. [2023-04-01 10:09:29,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50435 to 47138. [2023-04-01 10:09:29,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47138 states, 46020 states have (on average 1.1669708822251195) internal successors, (53704), 46335 states have internal predecessors, (53704), 213 states have call successors, (213), 213 states have call predecessors, (213), 904 states have return successors, (8931), 589 states have call predecessors, (8931), 212 states have call successors, (8931) [2023-04-01 10:09:30,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47138 states to 47138 states and 62848 transitions. [2023-04-01 10:09:30,010 INFO L78 Accepts]: Start accepts. Automaton has 47138 states and 62848 transitions. Word has length 93 [2023-04-01 10:09:30,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:09:30,011 INFO L495 AbstractCegarLoop]: Abstraction has 47138 states and 62848 transitions. [2023-04-01 10:09:30,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 10:09:30,011 INFO L276 IsEmpty]: Start isEmpty. Operand 47138 states and 62848 transitions. [2023-04-01 10:09:30,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-04-01 10:09:30,013 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:09:30,013 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:09:30,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 10:09:30,013 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:09:30,014 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:09:30,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1391901144, now seen corresponding path program 1 times [2023-04-01 10:09:30,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:09:30,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873447552] [2023-04-01 10:09:30,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:09:30,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:09:30,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:09:30,213 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 72 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-04-01 10:09:30,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:09:30,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873447552] [2023-04-01 10:09:30,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873447552] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:09:30,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366828026] [2023-04-01 10:09:30,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:09:30,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:09:30,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:09:30,233 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 10:09:30,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 10:09:30,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:09:30,398 INFO L262 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 10:09:30,406 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:09:30,428 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2023-04-01 10:09:30,428 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 10:09:30,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366828026] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:09:30,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 10:09:30,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-04-01 10:09:30,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661032456] [2023-04-01 10:09:30,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:09:30,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:09:30,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:09:30,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:09:30,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:09:30,431 INFO L87 Difference]: Start difference. First operand 47138 states and 62848 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 10:09:33,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:09:33,744 INFO L93 Difference]: Finished difference Result 95714 states and 129060 transitions. [2023-04-01 10:09:33,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:09:33,745 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 99 [2023-04-01 10:09:33,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:09:33,876 INFO L225 Difference]: With dead ends: 95714 [2023-04-01 10:09:33,876 INFO L226 Difference]: Without dead ends: 48581 [2023-04-01 10:09:33,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:09:33,915 INFO L413 NwaCegarLoop]: 904 mSDtfsCounter, 856 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 2110 mSolverCounterSat, 611 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 856 SdHoareTripleChecker+Valid, 932 SdHoareTripleChecker+Invalid, 2721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 611 IncrementalHoareTripleChecker+Valid, 2110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-04-01 10:09:33,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [856 Valid, 932 Invalid, 2721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [611 Valid, 2110 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-04-01 10:09:33,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48581 states. [2023-04-01 10:09:34,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48581 to 48035. [2023-04-01 10:09:34,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48035 states, 46909 states have (on average 1.1456223752371613) internal successors, (53740), 47223 states have internal predecessors, (53740), 219 states have call successors, (219), 219 states have call predecessors, (219), 906 states have return successors, (7734), 592 states have call predecessors, (7734), 218 states have call successors, (7734) [2023-04-01 10:09:34,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48035 states to 48035 states and 61693 transitions. [2023-04-01 10:09:34,811 INFO L78 Accepts]: Start accepts. Automaton has 48035 states and 61693 transitions. Word has length 99 [2023-04-01 10:09:34,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:09:34,812 INFO L495 AbstractCegarLoop]: Abstraction has 48035 states and 61693 transitions. [2023-04-01 10:09:34,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 10:09:34,812 INFO L276 IsEmpty]: Start isEmpty. Operand 48035 states and 61693 transitions. [2023-04-01 10:09:34,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-04-01 10:09:34,817 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:09:34,817 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:09:34,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 10:09:35,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-04-01 10:09:35,023 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:09:35,023 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:09:35,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1735871932, now seen corresponding path program 1 times [2023-04-01 10:09:35,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:09:35,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371306427] [2023-04-01 10:09:35,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:09:35,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:09:35,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:09:35,157 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-04-01 10:09:35,157 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:09:35,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371306427] [2023-04-01 10:09:35,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371306427] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:09:35,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:09:35,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:09:35,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024311299] [2023-04-01 10:09:35,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:09:35,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:09:35,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:09:35,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:09:35,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:09:35,159 INFO L87 Difference]: Start difference. First operand 48035 states and 61693 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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 10:09:38,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:09:38,977 INFO L93 Difference]: Finished difference Result 111591 states and 146707 transitions. [2023-04-01 10:09:38,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:09:38,993 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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 122 [2023-04-01 10:09:38,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:09:39,165 INFO L225 Difference]: With dead ends: 111591 [2023-04-01 10:09:39,166 INFO L226 Difference]: Without dead ends: 63561 [2023-04-01 10:09:39,203 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 10:09:39,204 INFO L413 NwaCegarLoop]: 557 mSDtfsCounter, 684 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 2187 mSolverCounterSat, 588 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 2775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 588 IncrementalHoareTripleChecker+Valid, 2187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-04-01 10:09:39,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [684 Valid, 580 Invalid, 2775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [588 Valid, 2187 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-04-01 10:09:39,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63561 states. [2023-04-01 10:09:40,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63561 to 59783. [2023-04-01 10:09:40,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59783 states, 58449 states have (on average 1.1315848004243014) internal successors, (66140), 58816 states have internal predecessors, (66140), 276 states have call successors, (276), 276 states have call predecessors, (276), 1057 states have return successors, (10128), 690 states have call predecessors, (10128), 275 states have call successors, (10128) [2023-04-01 10:09:40,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59783 states to 59783 states and 76544 transitions. [2023-04-01 10:09:40,344 INFO L78 Accepts]: Start accepts. Automaton has 59783 states and 76544 transitions. Word has length 122 [2023-04-01 10:09:40,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:09:40,344 INFO L495 AbstractCegarLoop]: Abstraction has 59783 states and 76544 transitions. [2023-04-01 10:09:40,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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 10:09:40,345 INFO L276 IsEmpty]: Start isEmpty. Operand 59783 states and 76544 transitions. [2023-04-01 10:09:40,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-04-01 10:09:40,346 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:09:40,347 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:09:40,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-01 10:09:40,347 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:09:40,347 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:09:40,347 INFO L85 PathProgramCache]: Analyzing trace with hash 228771060, now seen corresponding path program 1 times [2023-04-01 10:09:40,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:09:40,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298650087] [2023-04-01 10:09:40,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:09:40,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:09:40,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:09:40,456 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 10:09:40,456 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:09:40,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298650087] [2023-04-01 10:09:40,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298650087] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:09:40,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:09:40,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:09:40,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822553458] [2023-04-01 10:09:40,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:09:40,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:09:40,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:09:40,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:09:40,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:09:40,457 INFO L87 Difference]: Start difference. First operand 59783 states and 76544 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 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 10:09:43,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:09:43,922 INFO L93 Difference]: Finished difference Result 134877 states and 175895 transitions. [2023-04-01 10:09:43,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:09:43,923 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 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 122 [2023-04-01 10:09:43,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:09:44,130 INFO L225 Difference]: With dead ends: 134877 [2023-04-01 10:09:44,131 INFO L226 Difference]: Without dead ends: 75099 [2023-04-01 10:09:44,174 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 10:09:44,175 INFO L413 NwaCegarLoop]: 1178 mSDtfsCounter, 685 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 2196 mSolverCounterSat, 519 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 1206 SdHoareTripleChecker+Invalid, 2715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 519 IncrementalHoareTripleChecker+Valid, 2196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-04-01 10:09:44,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [685 Valid, 1206 Invalid, 2715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [519 Valid, 2196 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-04-01 10:09:44,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75099 states. [2023-04-01 10:09:45,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75099 to 73497. [2023-04-01 10:09:45,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73497 states, 71999 states have (on average 1.119862775871887) internal successors, (80629), 72396 states have internal predecessors, (80629), 340 states have call successors, (340), 340 states have call predecessors, (340), 1157 states have return successors, (12308), 760 states have call predecessors, (12308), 339 states have call successors, (12308) [2023-04-01 10:09:45,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73497 states to 73497 states and 93277 transitions. [2023-04-01 10:09:45,505 INFO L78 Accepts]: Start accepts. Automaton has 73497 states and 93277 transitions. Word has length 122 [2023-04-01 10:09:45,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:09:45,505 INFO L495 AbstractCegarLoop]: Abstraction has 73497 states and 93277 transitions. [2023-04-01 10:09:45,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 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 10:09:45,505 INFO L276 IsEmpty]: Start isEmpty. Operand 73497 states and 93277 transitions. [2023-04-01 10:09:45,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2023-04-01 10:09:45,528 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:09:45,528 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:09:45,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-01 10:09:45,529 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:09:45,529 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:09:45,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1738639988, now seen corresponding path program 1 times [2023-04-01 10:09:45,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:09:45,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732399144] [2023-04-01 10:09:45,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:09:45,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:09:45,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:09:46,435 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 104 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 10:09:46,436 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:09:46,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732399144] [2023-04-01 10:09:46,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732399144] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:09:46,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278085633] [2023-04-01 10:09:46,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:09:46,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:09:46,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:09:46,455 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 10:09:46,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process