/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain IntervalDomain -i ../sv-benchmarks/c/eca-rers2012/Problem04_label43.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 21:25:49,108 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 21:25:49,109 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 21:25:49,141 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 21:25:49,142 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 21:25:49,144 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 21:25:49,148 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 21:25:49,149 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 21:25:49,149 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 21:25:49,150 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 21:25:49,151 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 21:25:49,151 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 21:25:49,152 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 21:25:49,152 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 21:25:49,153 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 21:25:49,154 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 21:25:49,154 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 21:25:49,155 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 21:25:49,156 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 21:25:49,159 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 21:25:49,162 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 21:25:49,166 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 21:25:49,167 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 21:25:49,168 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 21:25:49,178 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-31 21:25:49,181 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 21:25:49,182 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 21:25:49,183 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 21:25:49,184 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 21:25:49,184 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 21:25:49,184 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 21:25:49,185 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 21:25:49,185 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 21:25:49,185 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 21:25:49,186 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 21:25:49,186 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 21:25:49,188 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-03-31 21:25:49,212 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 21:25:49,212 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 21:25:49,213 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 21:25:49,213 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 21:25:49,214 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 21:25:49,214 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 21:25:49,214 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 21:25:49,214 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 21:25:49,214 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 21:25:49,214 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 21:25:49,215 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 21:25:49,215 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 21:25:49,215 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 21:25:49,215 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 21:25:49,215 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 21:25:49,215 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 21:25:49,215 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 21:25:49,215 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 21:25:49,216 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 21:25:49,216 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 21:25:49,216 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 21:25:49,216 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 21:25:49,216 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 21:25:49,216 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 21:25:49,216 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 21:25:49,216 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 21:25:49,217 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 21:25:49,217 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 21:25:49,217 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 21:25:49,217 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 21:25:49,217 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 21:25:49,217 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 21:25:49,217 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:25:49,217 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 21:25:49,217 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 21:25:49,218 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 21:25:49,218 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 21:25:49,218 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 21:25:49,218 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 21:25:49,218 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 21:25:49,218 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 21:25:49,218 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 21:25:49,387 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 21:25:49,400 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 21:25:49,402 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 21:25:49,402 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 21:25:49,403 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 21:25:49,403 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem04_label43.c [2023-03-31 21:25:50,540 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 21:25:50,932 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 21:25:50,933 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem04_label43.c [2023-03-31 21:25:50,960 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b9d39ecc/e0050da34ce8495ab3977afed5695ba5/FLAGc4968de99 [2023-03-31 21:25:50,978 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b9d39ecc/e0050da34ce8495ab3977afed5695ba5 [2023-03-31 21:25:50,980 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 21:25:50,981 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 21:25:50,984 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 21:25:50,984 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 21:25:50,986 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 21:25:50,987 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:25:50" (1/1) ... [2023-03-31 21:25:50,987 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fdf4155 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:25:50, skipping insertion in model container [2023-03-31 21:25:50,988 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:25:50" (1/1) ... [2023-03-31 21:25:50,993 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 21:25:51,085 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 21:25:51,938 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/Problem04_label43.c[182099,182112] [2023-03-31 21:25:51,954 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:25:51,963 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 21:25:52,293 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/Problem04_label43.c[182099,182112] [2023-03-31 21:25:52,298 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:25:52,319 INFO L208 MainTranslator]: Completed translation [2023-03-31 21:25:52,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:25:52 WrapperNode [2023-03-31 21:25:52,319 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 21:25:52,321 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 21:25:52,321 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 21:25:52,321 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 21:25:52,330 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:25:52" (1/1) ... [2023-03-31 21:25:52,330 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:25:52" (1/1) ... [2023-03-31 21:25:52,365 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:25:52" (1/1) ... [2023-03-31 21:25:52,366 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:25:52" (1/1) ... [2023-03-31 21:25:52,503 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:25:52" (1/1) ... [2023-03-31 21:25:52,537 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:25:52" (1/1) ... [2023-03-31 21:25:52,553 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:25:52" (1/1) ... [2023-03-31 21:25:52,565 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:25:52" (1/1) ... [2023-03-31 21:25:52,587 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 21:25:52,588 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 21:25:52,588 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 21:25:52,588 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 21:25:52,590 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:25:52" (1/1) ... [2023-03-31 21:25:52,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:25:52,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:25:52,646 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-31 21:25:52,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-31 21:25:52,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 21:25:52,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 21:25:52,690 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 21:25:52,690 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 21:25:52,690 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 21:25:52,690 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-31 21:25:52,690 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-03-31 21:25:52,690 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 21:25:52,690 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 21:25:52,690 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 21:25:52,690 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-31 21:25:52,690 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-03-31 21:25:52,690 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 21:25:52,691 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 21:25:52,691 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 21:25:52,691 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 21:25:52,691 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 21:25:52,691 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 21:25:52,691 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 21:25:52,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 21:25:52,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 21:25:52,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 21:25:52,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 21:25:52,691 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 21:25:52,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 21:25:52,825 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 21:25:52,827 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 21:25:56,125 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 21:25:56,368 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 21:25:56,368 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 21:25:56,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:25:56 BoogieIcfgContainer [2023-03-31 21:25:56,372 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 21:25:56,374 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 21:25:56,374 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 21:25:56,376 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 21:25:56,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 09:25:50" (1/3) ... [2023-03-31 21:25:56,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e595cc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:25:56, skipping insertion in model container [2023-03-31 21:25:56,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:25:52" (2/3) ... [2023-03-31 21:25:56,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e595cc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:25:56, skipping insertion in model container [2023-03-31 21:25:56,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:25:56" (3/3) ... [2023-03-31 21:25:56,379 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem04_label43.c [2023-03-31 21:25:56,391 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 21:25:56,391 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 21:25:56,436 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 21:25:56,440 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;@71bc7238, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 21:25:56,440 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 21:25:56,445 INFO L276 IsEmpty]: Start isEmpty. Operand has 785 states, 771 states have (on average 1.9779507133592737) internal successors, (1525), 772 states have internal predecessors, (1525), 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) [2023-03-31 21:25:56,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 768 [2023-03-31 21:25:56,470 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:25:56,471 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:25:56,472 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:25:56,475 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:25:56,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1185927850, now seen corresponding path program 1 times [2023-03-31 21:25:56,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:25:56,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485653123] [2023-03-31 21:25:56,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:25:56,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:25:56,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:25:59,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:25:59,480 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:25:59,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485653123] [2023-03-31 21:25:59,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485653123] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:25:59,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:25:59,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 21:25:59,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685237345] [2023-03-31 21:25:59,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:25:59,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 21:25:59,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:25:59,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 21:25:59,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 21:25:59,530 INFO L87 Difference]: Start difference. First operand has 785 states, 771 states have (on average 1.9779507133592737) internal successors, (1525), 772 states have internal predecessors, (1525), 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 253.33333333333334) internal successors, (760), 2 states have internal predecessors, (760), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 21:26:02,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:26:02,102 INFO L93 Difference]: Finished difference Result 2343 states and 4615 transitions. [2023-03-31 21:26:02,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 21:26:02,104 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 253.33333333333334) internal successors, (760), 2 states have internal predecessors, (760), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 767 [2023-03-31 21:26:02,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:26:02,126 INFO L225 Difference]: With dead ends: 2343 [2023-03-31 21:26:02,126 INFO L226 Difference]: Without dead ends: 1555 [2023-03-31 21:26:02,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 21:26:02,134 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 137 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 2667 mSolverCounterSat, 382 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 3049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 382 IncrementalHoareTripleChecker+Valid, 2667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-03-31 21:26:02,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 240 Invalid, 3049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [382 Valid, 2667 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-03-31 21:26:02,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2023-03-31 21:26:02,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 1555. [2023-03-31 21:26:02,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1555 states, 1535 states have (on average 1.8684039087947883) internal successors, (2868), 1535 states have internal predecessors, (2868), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (17), 9 states have call predecessors, (17), 9 states have call successors, (17) [2023-03-31 21:26:02,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1555 states to 1555 states and 2895 transitions. [2023-03-31 21:26:02,260 INFO L78 Accepts]: Start accepts. Automaton has 1555 states and 2895 transitions. Word has length 767 [2023-03-31 21:26:02,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:26:02,262 INFO L495 AbstractCegarLoop]: Abstraction has 1555 states and 2895 transitions. [2023-03-31 21:26:02,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 253.33333333333334) internal successors, (760), 2 states have internal predecessors, (760), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 21:26:02,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1555 states and 2895 transitions. [2023-03-31 21:26:02,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 776 [2023-03-31 21:26:02,282 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:26:02,282 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:26:02,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 21:26:02,283 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:26:02,283 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:26:02,283 INFO L85 PathProgramCache]: Analyzing trace with hash 127028664, now seen corresponding path program 1 times [2023-03-31 21:26:02,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:26:02,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559004819] [2023-03-31 21:26:02,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:26:02,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:26:02,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:26:04,156 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:26:04,156 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:26:04,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559004819] [2023-03-31 21:26:04,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559004819] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:26:04,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:26:04,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:26:04,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612074108] [2023-03-31 21:26:04,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:26:04,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:26:04,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:26:04,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:26:04,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:26:04,163 INFO L87 Difference]: Start difference. First operand 1555 states and 2895 transitions. Second operand has 5 states, 5 states have (on average 153.2) internal successors, (766), 4 states have internal predecessors, (766), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:26:07,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:26:07,445 INFO L93 Difference]: Finished difference Result 4762 states and 8869 transitions. [2023-03-31 21:26:07,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 21:26:07,445 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 153.2) internal successors, (766), 4 states have internal predecessors, (766), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 775 [2023-03-31 21:26:07,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:26:07,458 INFO L225 Difference]: With dead ends: 4762 [2023-03-31 21:26:07,458 INFO L226 Difference]: Without dead ends: 3212 [2023-03-31 21:26:07,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-31 21:26:07,462 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 2550 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 4204 mSolverCounterSat, 1729 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2550 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 5933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1729 IncrementalHoareTripleChecker+Valid, 4204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-03-31 21:26:07,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2550 Valid, 146 Invalid, 5933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1729 Valid, 4204 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-03-31 21:26:07,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3212 states. [2023-03-31 21:26:07,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3212 to 3185. [2023-03-31 21:26:07,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3185 states, 3119 states have (on average 1.5950625200384738) internal successors, (4975), 3127 states have internal predecessors, (4975), 18 states have call successors, (18), 18 states have call predecessors, (18), 47 states have return successors, (115), 39 states have call predecessors, (115), 17 states have call successors, (115) [2023-03-31 21:26:07,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3185 states to 3185 states and 5108 transitions. [2023-03-31 21:26:07,569 INFO L78 Accepts]: Start accepts. Automaton has 3185 states and 5108 transitions. Word has length 775 [2023-03-31 21:26:07,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:26:07,570 INFO L495 AbstractCegarLoop]: Abstraction has 3185 states and 5108 transitions. [2023-03-31 21:26:07,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 153.2) internal successors, (766), 4 states have internal predecessors, (766), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:26:07,570 INFO L276 IsEmpty]: Start isEmpty. Operand 3185 states and 5108 transitions. [2023-03-31 21:26:07,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 778 [2023-03-31 21:26:07,583 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:26:07,584 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:26:07,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 21:26:07,584 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:26:07,585 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:26:07,585 INFO L85 PathProgramCache]: Analyzing trace with hash -2130847308, now seen corresponding path program 1 times [2023-03-31 21:26:07,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:26:07,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105814617] [2023-03-31 21:26:07,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:26:07,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:26:07,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:26:08,348 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:26:08,348 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:26:08,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105814617] [2023-03-31 21:26:08,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105814617] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:26:08,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:26:08,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:26:08,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145220176] [2023-03-31 21:26:08,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:26:08,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:26:08,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:26:08,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:26:08,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:26:08,352 INFO L87 Difference]: Start difference. First operand 3185 states and 5108 transitions. Second operand has 5 states, 5 states have (on average 153.6) internal successors, (768), 4 states have internal predecessors, (768), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:26:11,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:26:11,558 INFO L93 Difference]: Finished difference Result 9670 states and 15703 transitions. [2023-03-31 21:26:11,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 21:26:11,559 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 153.6) internal successors, (768), 4 states have internal predecessors, (768), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 777 [2023-03-31 21:26:11,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:26:11,583 INFO L225 Difference]: With dead ends: 9670 [2023-03-31 21:26:11,583 INFO L226 Difference]: Without dead ends: 6490 [2023-03-31 21:26:11,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-31 21:26:11,595 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 3287 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 3833 mSolverCounterSat, 1561 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3287 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 5394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1561 IncrementalHoareTripleChecker+Valid, 3833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-03-31 21:26:11,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3287 Valid, 94 Invalid, 5394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1561 Valid, 3833 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-03-31 21:26:11,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6490 states. [2023-03-31 21:26:11,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6490 to 6449. [2023-03-31 21:26:11,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6449 states, 6289 states have (on average 1.4251868341548737) internal successors, (8963), 6315 states have internal predecessors, (8963), 34 states have call successors, (34), 34 states have call predecessors, (34), 125 states have return successors, (369), 99 states have call predecessors, (369), 33 states have call successors, (369) [2023-03-31 21:26:11,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6449 states to 6449 states and 9366 transitions. [2023-03-31 21:26:11,750 INFO L78 Accepts]: Start accepts. Automaton has 6449 states and 9366 transitions. Word has length 777 [2023-03-31 21:26:11,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:26:11,750 INFO L495 AbstractCegarLoop]: Abstraction has 6449 states and 9366 transitions. [2023-03-31 21:26:11,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 153.6) internal successors, (768), 4 states have internal predecessors, (768), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:26:11,751 INFO L276 IsEmpty]: Start isEmpty. Operand 6449 states and 9366 transitions. [2023-03-31 21:26:11,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 784 [2023-03-31 21:26:11,771 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:26:11,771 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:26:11,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 21:26:11,771 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:26:11,772 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:26:11,773 INFO L85 PathProgramCache]: Analyzing trace with hash 2116804008, now seen corresponding path program 1 times [2023-03-31 21:26:11,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:26:11,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698151869] [2023-03-31 21:26:11,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:26:11,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:26:11,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:26:12,654 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:26:12,655 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:26:12,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698151869] [2023-03-31 21:26:12,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698151869] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:26:12,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:26:12,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:26:12,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832098151] [2023-03-31 21:26:12,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:26:12,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:26:12,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:26:12,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:26:12,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:26:12,657 INFO L87 Difference]: Start difference. First operand 6449 states and 9366 transitions. Second operand has 5 states, 5 states have (on average 154.8) internal successors, (774), 4 states have internal predecessors, (774), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:26:15,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:26:15,637 INFO L93 Difference]: Finished difference Result 19565 states and 29533 transitions. [2023-03-31 21:26:15,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 21:26:15,649 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 154.8) internal successors, (774), 4 states have internal predecessors, (774), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 783 [2023-03-31 21:26:15,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:26:15,720 INFO L225 Difference]: With dead ends: 19565 [2023-03-31 21:26:15,721 INFO L226 Difference]: Without dead ends: 13121 [2023-03-31 21:26:15,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-31 21:26:15,745 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 3026 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 4164 mSolverCounterSat, 1395 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3026 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 5559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1395 IncrementalHoareTripleChecker+Valid, 4164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-03-31 21:26:15,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3026 Valid, 112 Invalid, 5559 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1395 Valid, 4164 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-03-31 21:26:15,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13121 states. [2023-03-31 21:26:15,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13121 to 12188. [2023-03-31 21:26:15,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12188 states, 11850 states have (on average 1.3648945147679326) internal successors, (16174), 11921 states have internal predecessors, (16174), 62 states have call successors, (62), 62 states have call predecessors, (62), 275 states have return successors, (1194), 204 states have call predecessors, (1194), 61 states have call successors, (1194) [2023-03-31 21:26:15,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12188 states to 12188 states and 17430 transitions. [2023-03-31 21:26:15,979 INFO L78 Accepts]: Start accepts. Automaton has 12188 states and 17430 transitions. Word has length 783 [2023-03-31 21:26:15,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:26:15,979 INFO L495 AbstractCegarLoop]: Abstraction has 12188 states and 17430 transitions. [2023-03-31 21:26:15,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 154.8) internal successors, (774), 4 states have internal predecessors, (774), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:26:15,980 INFO L276 IsEmpty]: Start isEmpty. Operand 12188 states and 17430 transitions. [2023-03-31 21:26:16,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 868 [2023-03-31 21:26:16,010 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:26:16,011 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:26:16,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 21:26:16,011 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:26:16,011 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:26:16,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1112920534, now seen corresponding path program 1 times [2023-03-31 21:26:16,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:26:16,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190397313] [2023-03-31 21:26:16,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:26:16,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:26:16,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:26:17,564 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 97 proven. 57 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-03-31 21:26:17,564 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:26:17,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190397313] [2023-03-31 21:26:17,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190397313] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:26:17,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491339120] [2023-03-31 21:26:17,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:26:17,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:26:17,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:26:17,583 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 21:26:17,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 21:26:17,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:26:17,880 INFO L262 TraceCheckSpWp]: Trace formula consists of 1425 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 21:26:17,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:26:18,037 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 140 proven. 2 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-03-31 21:26:18,037 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:26:18,221 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 120 proven. 22 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-03-31 21:26:18,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491339120] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:26:18,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1453472580] [2023-03-31 21:26:18,253 INFO L159 IcfgInterpreter]: Started Sifa with 771 locations of interest [2023-03-31 21:26:18,254 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:26:18,257 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:26:18,261 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:26:18,261 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:26:18,458 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 76 for LOIs [2023-03-31 21:26:19,996 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 104 for LOIs