/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/Problem12_label10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 21:57:54,187 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 21:57:54,190 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 21:57:54,221 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 21:57:54,222 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 21:57:54,222 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 21:57:54,224 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 21:57:54,234 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 21:57:54,237 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 21:57:54,241 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 21:57:54,242 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 21:57:54,244 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 21:57:54,244 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 21:57:54,246 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 21:57:54,248 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 21:57:54,249 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 21:57:54,250 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 21:57:54,251 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 21:57:54,252 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 21:57:54,253 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 21:57:54,254 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 21:57:54,257 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 21:57:54,260 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 21:57:54,261 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 21:57:54,267 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-31 21:57:54,270 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 21:57:54,270 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 21:57:54,271 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 21:57:54,271 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 21:57:54,272 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 21:57:54,272 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 21:57:54,272 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 21:57:54,273 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 21:57:54,273 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 21:57:54,274 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 21:57:54,274 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 21:57:54,275 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 21:57:54,293 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 21:57:54,294 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 21:57:54,294 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 21:57:54,294 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 21:57:54,295 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 21:57:54,295 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 21:57:54,295 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 21:57:54,295 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 21:57:54,295 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 21:57:54,295 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 21:57:54,296 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 21:57:54,296 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 21:57:54,296 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 21:57:54,296 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 21:57:54,296 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 21:57:54,296 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 21:57:54,296 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 21:57:54,297 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 21:57:54,297 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 21:57:54,297 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 21:57:54,297 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 21:57:54,297 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 21:57:54,298 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 21:57:54,298 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 21:57:54,298 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 21:57:54,298 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 21:57:54,298 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 21:57:54,298 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 21:57:54,298 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 21:57:54,298 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 21:57:54,299 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 21:57:54,299 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 21:57:54,299 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:57:54,299 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 21:57:54,299 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 21:57:54,299 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 21:57:54,300 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 21:57:54,300 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 21:57:54,300 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 21:57:54,300 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 21:57:54,300 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 21:57:54,300 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 21:57:54,501 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 21:57:54,521 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 21:57:54,523 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 21:57:54,524 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 21:57:54,525 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 21:57:54,526 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label10.c [2023-03-31 21:57:55,643 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 21:57:56,061 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 21:57:56,062 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label10.c [2023-03-31 21:57:56,087 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d5258e87/4822a83822e8443a932ea5b5d3557209/FLAGe6135783d [2023-03-31 21:57:56,104 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d5258e87/4822a83822e8443a932ea5b5d3557209 [2023-03-31 21:57:56,106 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 21:57:56,108 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 21:57:56,112 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 21:57:56,112 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 21:57:56,115 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 21:57:56,116 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:57:56" (1/1) ... [2023-03-31 21:57:56,117 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e13735f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:57:56, skipping insertion in model container [2023-03-31 21:57:56,117 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:57:56" (1/1) ... [2023-03-31 21:57:56,123 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 21:57:56,231 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 21:57:56,466 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/Problem12_label10.c[3658,3671] [2023-03-31 21:57:57,138 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:57:57,152 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 21:57:57,178 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/Problem12_label10.c[3658,3671] [2023-03-31 21:57:57,547 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:57:57,566 INFO L208 MainTranslator]: Completed translation [2023-03-31 21:57:57,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:57:57 WrapperNode [2023-03-31 21:57:57,567 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 21:57:57,569 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 21:57:57,569 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 21:57:57,569 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 21:57:57,579 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:57:57" (1/1) ... [2023-03-31 21:57:57,579 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:57:57" (1/1) ... [2023-03-31 21:57:57,627 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:57:57" (1/1) ... [2023-03-31 21:57:57,627 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:57:57" (1/1) ... [2023-03-31 21:57:57,704 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:57:57" (1/1) ... [2023-03-31 21:57:57,721 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:57:57" (1/1) ... [2023-03-31 21:57:57,770 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:57:57" (1/1) ... [2023-03-31 21:57:57,782 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:57:57" (1/1) ... [2023-03-31 21:57:57,820 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 21:57:57,821 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 21:57:57,821 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 21:57:57,821 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 21:57:57,825 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:57:57" (1/1) ... [2023-03-31 21:57:57,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:57:57,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:57:57,852 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 21:57:57,860 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 21:57:57,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 21:57:57,892 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 21:57:57,892 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 21:57:57,892 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 21:57:57,892 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 21:57:57,892 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-31 21:57:57,892 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-03-31 21:57:57,892 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 21:57:57,892 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 21:57:57,892 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 21:57:57,892 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-31 21:57:57,893 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-03-31 21:57:57,893 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 21:57:57,893 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 21:57:57,893 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 21:57:57,893 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 21:57:57,893 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 21:57:57,894 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 21:57:57,894 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 21:57:57,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 21:57:57,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 21:57:57,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 21:57:57,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 21:57:57,894 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 21:57:57,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 21:57:57,980 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 21:57:57,982 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 21:58:01,617 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 21:58:02,237 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 21:58:02,237 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 21:58:02,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:58:02 BoogieIcfgContainer [2023-03-31 21:58:02,241 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 21:58:02,244 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 21:58:02,244 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 21:58:02,246 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 21:58:02,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 09:57:56" (1/3) ... [2023-03-31 21:58:02,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9b10e43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:58:02, skipping insertion in model container [2023-03-31 21:58:02,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:57:57" (2/3) ... [2023-03-31 21:58:02,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9b10e43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:58:02, skipping insertion in model container [2023-03-31 21:58:02,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:58:02" (3/3) ... [2023-03-31 21:58:02,248 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label10.c [2023-03-31 21:58:02,263 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 21:58:02,263 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 21:58:02,329 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 21:58:02,334 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;@59fc699, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 21:58:02,335 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 21:58:02,343 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) [2023-03-31 21:58:02,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 21:58:02,348 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:58:02,349 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:58:02,350 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:58:02,354 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:58:02,355 INFO L85 PathProgramCache]: Analyzing trace with hash 636338945, now seen corresponding path program 1 times [2023-03-31 21:58:02,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:58:02,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514887363] [2023-03-31 21:58:02,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:58:02,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:58:02,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:58:02,731 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 21:58:02,731 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:58:02,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514887363] [2023-03-31 21:58:02,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514887363] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:58:02,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:58:02,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 21:58:02,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574620045] [2023-03-31 21:58:02,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:58:02,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 21:58:02,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:58:02,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 21:58:02,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 21:58:02,770 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) [2023-03-31 21:58:06,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:58:06,195 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-03-31 21:58:06,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 21:58:06,197 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 [2023-03-31 21:58:06,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:58:06,225 INFO L225 Difference]: With dead ends: 2068 [2023-03-31 21:58:06,225 INFO L226 Difference]: Without dead ends: 1371 [2023-03-31 21:58:06,231 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 [2023-03-31 21:58:06,234 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 803 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2101 mSolverCounterSat, 664 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 803 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 2765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 664 IncrementalHoareTripleChecker+Valid, 2101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-03-31 21:58:06,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [803 Valid, 270 Invalid, 2765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [664 Valid, 2101 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-03-31 21:58:06,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-03-31 21:58:06,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1365. [2023-03-31 21:58:06,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1365 states, 1347 states have (on average 1.821826280623608) internal successors, (2454), 1347 states have internal predecessors, (2454), 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) [2023-03-31 21:58:06,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1365 states to 1365 states and 2477 transitions. [2023-03-31 21:58:06,361 INFO L78 Accepts]: Start accepts. Automaton has 1365 states and 2477 transitions. Word has length 11 [2023-03-31 21:58:06,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:58:06,361 INFO L495 AbstractCegarLoop]: Abstraction has 1365 states and 2477 transitions. [2023-03-31 21:58:06,361 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) [2023-03-31 21:58:06,361 INFO L276 IsEmpty]: Start isEmpty. Operand 1365 states and 2477 transitions. [2023-03-31 21:58:06,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-03-31 21:58:06,363 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:58:06,363 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] [2023-03-31 21:58:06,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 21:58:06,363 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:58:06,364 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:58:06,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1015458216, now seen corresponding path program 1 times [2023-03-31 21:58:06,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:58:06,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232191515] [2023-03-31 21:58:06,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:58:06,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:58:06,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:58:06,661 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-31 21:58:06,662 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:58:06,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232191515] [2023-03-31 21:58:06,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232191515] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:58:06,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116955163] [2023-03-31 21:58:06,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:58:06,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:58:06,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:58:06,669 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 21:58:06,699 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 21:58:06,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:58:06,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 21:58:06,787 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:58:06,874 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 21:58:06,874 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 21:58:06,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116955163] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:58:06,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 21:58:06,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-03-31 21:58:06,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047335955] [2023-03-31 21:58:06,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:58:06,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 21:58:06,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:58:06,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 21:58:06,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:58:06,877 INFO L87 Difference]: Start difference. First operand 1365 states and 2477 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 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) [2023-03-31 21:58:10,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:58:10,850 INFO L93 Difference]: Finished difference Result 4081 states and 7455 transitions. [2023-03-31 21:58:10,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 21:58:10,853 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 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 27 [2023-03-31 21:58:10,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:58:10,865 INFO L225 Difference]: With dead ends: 4081 [2023-03-31 21:58:10,865 INFO L226 Difference]: Without dead ends: 2721 [2023-03-31 21:58:10,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:58:10,870 INFO L413 NwaCegarLoop]: 1214 mSDtfsCounter, 686 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 2294 mSolverCounterSat, 577 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 686 SdHoareTripleChecker+Valid, 1242 SdHoareTripleChecker+Invalid, 2871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 577 IncrementalHoareTripleChecker+Valid, 2294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-03-31 21:58:10,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [686 Valid, 1242 Invalid, 2871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [577 Valid, 2294 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2023-03-31 21:58:10,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2721 states. [2023-03-31 21:58:10,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2721 to 2718. [2023-03-31 21:58:10,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2718 states, 2688 states have (on average 1.6986607142857142) internal successors, (4566), 2688 states have internal predecessors, (4566), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (50), 14 states have call predecessors, (50), 14 states have call successors, (50) [2023-03-31 21:58:10,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2718 states to 2718 states and 4631 transitions. [2023-03-31 21:58:10,958 INFO L78 Accepts]: Start accepts. Automaton has 2718 states and 4631 transitions. Word has length 27 [2023-03-31 21:58:10,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:58:10,959 INFO L495 AbstractCegarLoop]: Abstraction has 2718 states and 4631 transitions. [2023-03-31 21:58:10,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 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) [2023-03-31 21:58:10,959 INFO L276 IsEmpty]: Start isEmpty. Operand 2718 states and 4631 transitions. [2023-03-31 21:58:10,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-03-31 21:58:10,961 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:58:10,961 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] [2023-03-31 21:58:10,970 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-31 21:58:11,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:58:11,167 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:58:11,168 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:58:11,168 INFO L85 PathProgramCache]: Analyzing trace with hash 619451616, now seen corresponding path program 1 times [2023-03-31 21:58:11,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:58:11,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889924550] [2023-03-31 21:58:11,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:58:11,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:58:11,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:58:11,330 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 21:58:11,330 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:58:11,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889924550] [2023-03-31 21:58:11,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889924550] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:58:11,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:58:11,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:58:11,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595416938] [2023-03-31 21:58:11,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:58:11,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:58:11,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:58:11,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:58:11,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:58:11,333 INFO L87 Difference]: Start difference. First operand 2718 states and 4631 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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) [2023-03-31 21:58:15,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:58:15,724 INFO L93 Difference]: Finished difference Result 8254 states and 14243 transitions. [2023-03-31 21:58:15,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 21:58:15,729 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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 31 [2023-03-31 21:58:15,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:58:15,754 INFO L225 Difference]: With dead ends: 8254 [2023-03-31 21:58:15,755 INFO L226 Difference]: Without dead ends: 5541 [2023-03-31 21:58:15,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-03-31 21:58:15,763 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 2684 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 4011 mSolverCounterSat, 670 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2684 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 4681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 670 IncrementalHoareTripleChecker+Valid, 4011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-03-31 21:58:15,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2684 Valid, 89 Invalid, 4681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [670 Valid, 4011 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-03-31 21:58:15,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5541 states. [2023-03-31 21:58:15,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5541 to 5489. [2023-03-31 21:58:15,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5489 states, 5409 states have (on average 1.5289332593825107) internal successors, (8270), 5419 states have internal predecessors, (8270), 27 states have call successors, (27), 27 states have call predecessors, (27), 52 states have return successors, (247), 42 states have call predecessors, (247), 26 states have call successors, (247) [2023-03-31 21:58:15,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5489 states to 5489 states and 8544 transitions. [2023-03-31 21:58:15,909 INFO L78 Accepts]: Start accepts. Automaton has 5489 states and 8544 transitions. Word has length 31 [2023-03-31 21:58:15,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:58:15,910 INFO L495 AbstractCegarLoop]: Abstraction has 5489 states and 8544 transitions. [2023-03-31 21:58:15,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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) [2023-03-31 21:58:15,911 INFO L276 IsEmpty]: Start isEmpty. Operand 5489 states and 8544 transitions. [2023-03-31 21:58:15,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-03-31 21:58:15,918 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:58:15,918 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] [2023-03-31 21:58:15,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 21:58:15,919 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:58:15,919 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:58:15,919 INFO L85 PathProgramCache]: Analyzing trace with hash 995838101, now seen corresponding path program 1 times [2023-03-31 21:58:15,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:58:15,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920828149] [2023-03-31 21:58:15,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:58:15,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:58:15,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:58:16,090 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 21:58:16,091 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:58:16,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920828149] [2023-03-31 21:58:16,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920828149] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:58:16,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:58:16,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:58:16,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436457660] [2023-03-31 21:58:16,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:58:16,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:58:16,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:58:16,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:58:16,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:58:16,095 INFO L87 Difference]: Start difference. First operand 5489 states and 8544 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 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) [2023-03-31 21:58:20,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:58:20,133 INFO L93 Difference]: Finished difference Result 16764 states and 27180 transitions. [2023-03-31 21:58:20,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 21:58:20,133 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 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 42 [2023-03-31 21:58:20,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:58:20,186 INFO L225 Difference]: With dead ends: 16764 [2023-03-31 21:58:20,186 INFO L226 Difference]: Without dead ends: 11280 [2023-03-31 21:58:20,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-03-31 21:58:20,207 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 2087 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 4705 mSolverCounterSat, 710 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2087 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 5415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 710 IncrementalHoareTripleChecker+Valid, 4705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-03-31 21:58:20,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2087 Valid, 90 Invalid, 5415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [710 Valid, 4705 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-03-31 21:58:20,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11280 states. [2023-03-31 21:58:20,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11280 to 10967. [2023-03-31 21:58:20,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10967 states, 10721 states have (on average 1.3593881167801511) internal successors, (14574), 10776 states have internal predecessors, (14574), 51 states have call successors, (51), 51 states have call predecessors, (51), 194 states have return successors, (1255), 139 states have call predecessors, (1255), 50 states have call successors, (1255) [2023-03-31 21:58:20,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10967 states to 10967 states and 15880 transitions. [2023-03-31 21:58:20,514 INFO L78 Accepts]: Start accepts. Automaton has 10967 states and 15880 transitions. Word has length 42 [2023-03-31 21:58:20,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:58:20,515 INFO L495 AbstractCegarLoop]: Abstraction has 10967 states and 15880 transitions. [2023-03-31 21:58:20,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 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) [2023-03-31 21:58:20,515 INFO L276 IsEmpty]: Start isEmpty. Operand 10967 states and 15880 transitions. [2023-03-31 21:58:20,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-03-31 21:58:20,518 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:58:20,518 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:58:20,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 21:58:20,519 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:58:20,519 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:58:20,519 INFO L85 PathProgramCache]: Analyzing trace with hash 613408828, now seen corresponding path program 1 times [2023-03-31 21:58:20,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:58:20,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241816660] [2023-03-31 21:58:20,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:58:20,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:58:20,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:58:20,733 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 21:58:20,733 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:58:20,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241816660] [2023-03-31 21:58:20,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241816660] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:58:20,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:58:20,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:58:20,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947110300] [2023-03-31 21:58:20,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:58:20,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:58:20,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:58:20,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:58:20,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:58:20,745 INFO L87 Difference]: Start difference. First operand 10967 states and 15880 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 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) [2023-03-31 21:58:24,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:58:24,464 INFO L93 Difference]: Finished difference Result 31960 states and 49363 transitions. [2023-03-31 21:58:24,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 21:58:24,465 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 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 65 [2023-03-31 21:58:24,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:58:24,552 INFO L225 Difference]: With dead ends: 31960 [2023-03-31 21:58:24,552 INFO L226 Difference]: Without dead ends: 20998 [2023-03-31 21:58:24,585 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 21:58:24,586 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 2392 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 3760 mSolverCounterSat, 1284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2392 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 5044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1284 IncrementalHoareTripleChecker+Valid, 3760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-03-31 21:58:24,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2392 Valid, 101 Invalid, 5044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1284 Valid, 3760 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-03-31 21:58:24,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20998 states. [2023-03-31 21:58:25,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20998 to 20784. [2023-03-31 21:58:25,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20784 states, 20289 states have (on average 1.3296860367686925) internal successors, (26978), 20420 states have internal predecessors, (26978), 94 states have call successors, (94), 94 states have call predecessors, (94), 400 states have return successors, (3305), 269 states have call predecessors, (3305), 93 states have call successors, (3305) [2023-03-31 21:58:25,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20784 states to 20784 states and 30377 transitions. [2023-03-31 21:58:25,159 INFO L78 Accepts]: Start accepts. Automaton has 20784 states and 30377 transitions. Word has length 65 [2023-03-31 21:58:25,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:58:25,160 INFO L495 AbstractCegarLoop]: Abstraction has 20784 states and 30377 transitions. [2023-03-31 21:58:25,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 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) [2023-03-31 21:58:25,161 INFO L276 IsEmpty]: Start isEmpty. Operand 20784 states and 30377 transitions. [2023-03-31 21:58:25,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-03-31 21:58:25,162 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:58:25,163 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:58:25,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-03-31 21:58:25,163 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:58:25,164 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:58:25,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1632272875, now seen corresponding path program 1 times [2023-03-31 21:58:25,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:58:25,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658944622] [2023-03-31 21:58:25,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:58:25,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:58:25,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:58:25,356 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 33 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-03-31 21:58:25,356 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:58:25,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658944622] [2023-03-31 21:58:25,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658944622] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:58:25,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711650778] [2023-03-31 21:58:25,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:58:25,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:58:25,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:58:25,365 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) [2023-03-31 21:58:25,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 21:58:25,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:58:25,499 INFO L262 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 21:58:25,503 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:58:25,594 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 59 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 21:58:25,594 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:58:25,777 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 33 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-03-31 21:58:25,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711650778] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:58:25,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1170838323] [2023-03-31 21:58:25,797 INFO L159 IcfgInterpreter]: Started Sifa with 50 locations of interest [2023-03-31 21:58:25,797 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:58:25,800 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:58:25,804 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:58:25,804 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:58:25,934 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 52 for LOIs [2023-03-31 21:58:26,055 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 21 [2023-03-31 21:58:26,280 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 40 [2023-03-31 21:58:27,032 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 46 for LOIs [2023-03-31 21:58:27,106 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 21 [2023-03-31 21:58:27,943 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 40 [2023-03-31 21:58:31,787 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 88075 conjuctions. This might take some time... [2023-03-31 21:58:44,781 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 1125 conjuctions.