/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/Problem13_label20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:03:11,245 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:03:11,247 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:03:11,281 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:03:11,282 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:03:11,284 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:03:11,286 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:03:11,288 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:03:11,289 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:03:11,294 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:03:11,295 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:03:11,296 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:03:11,296 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:03:11,298 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:03:11,299 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:03:11,300 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:03:11,300 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:03:11,301 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:03:11,302 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:03:11,307 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:03:11,308 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:03:11,308 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:03:11,309 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:03:11,310 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:03:11,313 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 22:03:11,313 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 22:03:11,313 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 22:03:11,314 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 22:03:11,315 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 22:03:11,315 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 22:03:11,315 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:03:11,316 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:03:11,317 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:03:11,317 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:03:11,317 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:03:11,318 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:03:11,318 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:03:11,318 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:03:11,318 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:03:11,319 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:03:11,319 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:03:11,320 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 22:03:11,345 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:03:11,345 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:03:11,346 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:03:11,346 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:03:11,346 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:03:11,346 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:03:11,347 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:03:11,347 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:03:11,347 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:03:11,347 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:03:11,347 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:03:11,347 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:03:11,348 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:03:11,348 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:03:11,348 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:03:11,348 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:03:11,348 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:03:11,348 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:03:11,348 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:03:11,349 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:03:11,349 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:03:11,349 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:03:11,349 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:03:11,349 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:03:11,349 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:03:11,349 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:03:11,349 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:03:11,349 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:03:11,350 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:03:11,350 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:03:11,350 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:03:11,350 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:03:11,350 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:03:11,350 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:03:11,350 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:03:11,350 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:03:11,350 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:03:11,350 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:03:11,351 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:03:11,351 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:03:11,351 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:03:11,351 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:03:11,531 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:03:11,544 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:03:11,548 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:03:11,549 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:03:11,550 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:03:11,550 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label20.c [2023-03-31 22:03:12,457 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:03:12,823 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:03:12,824 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label20.c [2023-03-31 22:03:12,849 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/620237cc2/ab190f4f8a3444fc9714d5d99eb08b14/FLAG9c538714c [2023-03-31 22:03:12,863 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/620237cc2/ab190f4f8a3444fc9714d5d99eb08b14 [2023-03-31 22:03:12,866 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:03:12,867 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:03:12,868 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:03:12,868 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:03:12,870 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:03:12,871 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:03:12" (1/1) ... [2023-03-31 22:03:12,872 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a2a7da1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:03:12, skipping insertion in model container [2023-03-31 22:03:12,872 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:03:12" (1/1) ... [2023-03-31 22:03:12,876 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:03:12,978 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:03:13,181 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label20.c[7839,7852] [2023-03-31 22:03:13,808 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:03:13,817 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:03:13,841 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label20.c[7839,7852] [2023-03-31 22:03:14,117 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:03:14,160 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:03:14,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:03:14 WrapperNode [2023-03-31 22:03:14,160 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:03:14,161 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:03:14,161 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:03:14,161 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:03:14,169 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:03:14" (1/1) ... [2023-03-31 22:03:14,169 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:03:14" (1/1) ... [2023-03-31 22:03:14,215 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:03:14" (1/1) ... [2023-03-31 22:03:14,215 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:03:14" (1/1) ... [2023-03-31 22:03:14,298 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:03:14" (1/1) ... [2023-03-31 22:03:14,318 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:03:14" (1/1) ... [2023-03-31 22:03:14,341 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:03:14" (1/1) ... [2023-03-31 22:03:14,354 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:03:14" (1/1) ... [2023-03-31 22:03:14,383 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:03:14,384 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:03:14,384 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:03:14,385 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:03:14,386 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:03:14" (1/1) ... [2023-03-31 22:03:14,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:03:14,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:03:14,408 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 22:03:14,414 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 22:03:14,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:03:14,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:03:14,437 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:03:14,437 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 22:03:14,437 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 22:03:14,438 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-31 22:03:14,438 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-03-31 22:03:14,438 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:03:14,438 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 22:03:14,438 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 22:03:14,438 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-31 22:03:14,438 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-03-31 22:03:14,438 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:03:14,438 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:03:14,438 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:03:14,438 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:03:14,438 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:03:14,438 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:03:14,438 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:03:14,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:03:14,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:03:14,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:03:14,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:03:14,439 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:03:14,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:03:14,514 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:03:14,516 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:03:18,107 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:03:20,166 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:03:20,166 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 22:03:20,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:03:20 BoogieIcfgContainer [2023-03-31 22:03:20,169 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:03:20,170 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:03:20,170 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:03:20,173 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:03:20,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:03:12" (1/3) ... [2023-03-31 22:03:20,173 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2511f829 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:03:20, skipping insertion in model container [2023-03-31 22:03:20,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:03:14" (2/3) ... [2023-03-31 22:03:20,173 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2511f829 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:03:20, skipping insertion in model container [2023-03-31 22:03:20,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:03:20" (3/3) ... [2023-03-31 22:03:20,174 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label20.c [2023-03-31 22:03:20,187 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:03:20,187 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:03:20,228 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:03:20,232 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;@587274ed, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:03:20,232 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:03:20,237 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 22:03:20,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 22:03:20,242 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:03:20,242 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:03:20,242 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:03:20,246 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:03:20,246 INFO L85 PathProgramCache]: Analyzing trace with hash -330927564, now seen corresponding path program 1 times [2023-03-31 22:03:20,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:03:20,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088937325] [2023-03-31 22:03:20,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:03:20,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:03:20,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:03:20,637 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 22:03:20,637 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:03:20,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088937325] [2023-03-31 22:03:20,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088937325] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:03:20,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:03:20,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:03:20,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971231293] [2023-03-31 22:03:20,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:03:20,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:03:20,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:03:20,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:03:20,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:03:20,670 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 22:03:23,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:03:23,760 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-03-31 22:03:23,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:03:23,761 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 22:03:23,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:03:23,780 INFO L225 Difference]: With dead ends: 2068 [2023-03-31 22:03:23,781 INFO L226 Difference]: Without dead ends: 1371 [2023-03-31 22:03:23,786 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 22:03:23,788 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 735 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2367 mSolverCounterSat, 436 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 735 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 2803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 436 IncrementalHoareTripleChecker+Valid, 2367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-03-31 22:03:23,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [735 Valid, 178 Invalid, 2803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [436 Valid, 2367 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-03-31 22:03:23,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-03-31 22:03:23,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1365. [2023-03-31 22:03:23,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1365 states, 1347 states have (on average 1.8574610244988865) internal successors, (2502), 1347 states have internal predecessors, (2502), 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 22:03:23,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1365 states to 1365 states and 2525 transitions. [2023-03-31 22:03:23,866 INFO L78 Accepts]: Start accepts. Automaton has 1365 states and 2525 transitions. Word has length 11 [2023-03-31 22:03:23,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:03:23,867 INFO L495 AbstractCegarLoop]: Abstraction has 1365 states and 2525 transitions. [2023-03-31 22:03:23,867 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 22:03:23,867 INFO L276 IsEmpty]: Start isEmpty. Operand 1365 states and 2525 transitions. [2023-03-31 22:03:23,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-03-31 22:03:23,868 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:03:23,868 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:03:23,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:03:23,868 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:03:23,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:03:23,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1799665246, now seen corresponding path program 1 times [2023-03-31 22:03:23,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:03:23,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424037590] [2023-03-31 22:03:23,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:03:23,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:03:23,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:03:24,034 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 22:03:24,035 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:03:24,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424037590] [2023-03-31 22:03:24,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424037590] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:03:24,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:03:24,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:03:24,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108073082] [2023-03-31 22:03:24,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:03:24,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:03:24,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:03:24,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:03:24,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:03:24,037 INFO L87 Difference]: Start difference. First operand 1365 states and 2525 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:03:27,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:03:27,666 INFO L93 Difference]: Finished difference Result 4150 states and 7698 transitions. [2023-03-31 22:03:27,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:03:27,666 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2023-03-31 22:03:27,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:03:27,677 INFO L225 Difference]: With dead ends: 4150 [2023-03-31 22:03:27,678 INFO L226 Difference]: Without dead ends: 2790 [2023-03-31 22:03:27,685 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 22:03:27,688 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 2455 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 3743 mSolverCounterSat, 1165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2455 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 4908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1165 IncrementalHoareTripleChecker+Valid, 3743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-03-31 22:03:27,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2455 Valid, 109 Invalid, 4908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1165 Valid, 3743 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-03-31 22:03:27,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2790 states. [2023-03-31 22:03:27,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2790 to 2749. [2023-03-31 22:03:27,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2749 states, 2702 states have (on average 1.5906735751295338) internal successors, (4298), 2708 states have internal predecessors, (4298), 15 states have call successors, (15), 15 states have call predecessors, (15), 31 states have return successors, (79), 25 states have call predecessors, (79), 14 states have call successors, (79) [2023-03-31 22:03:27,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2749 states to 2749 states and 4392 transitions. [2023-03-31 22:03:27,756 INFO L78 Accepts]: Start accepts. Automaton has 2749 states and 4392 transitions. Word has length 21 [2023-03-31 22:03:27,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:03:27,756 INFO L495 AbstractCegarLoop]: Abstraction has 2749 states and 4392 transitions. [2023-03-31 22:03:27,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:03:27,756 INFO L276 IsEmpty]: Start isEmpty. Operand 2749 states and 4392 transitions. [2023-03-31 22:03:27,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-03-31 22:03:27,757 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:03:27,757 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:03:27,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 22:03:27,757 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:03:27,759 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:03:27,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1824570, now seen corresponding path program 1 times [2023-03-31 22:03:27,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:03:27,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81071822] [2023-03-31 22:03:27,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:03:27,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:03:27,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:03:27,890 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 22:03:27,890 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:03:27,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81071822] [2023-03-31 22:03:27,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81071822] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:03:27,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:03:27,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:03:27,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804735805] [2023-03-31 22:03:27,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:03:27,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:03:27,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:03:27,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:03:27,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:03:27,892 INFO L87 Difference]: Start difference. First operand 2749 states and 4392 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:03:32,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:03:32,136 INFO L93 Difference]: Finished difference Result 8429 states and 13621 transitions. [2023-03-31 22:03:32,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:03:32,148 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2023-03-31 22:03:32,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:03:32,168 INFO L225 Difference]: With dead ends: 8429 [2023-03-31 22:03:32,168 INFO L226 Difference]: Without dead ends: 5685 [2023-03-31 22:03:32,174 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 22:03:32,174 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 2178 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 4872 mSolverCounterSat, 859 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2178 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 5731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 859 IncrementalHoareTripleChecker+Valid, 4872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-03-31 22:03:32,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2178 Valid, 134 Invalid, 5731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [859 Valid, 4872 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-03-31 22:03:32,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5685 states. [2023-03-31 22:03:32,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5685 to 5634. [2023-03-31 22:03:32,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5634 states, 5490 states have (on average 1.3936247723132968) internal successors, (7651), 5522 states have internal predecessors, (7651), 27 states have call successors, (27), 27 states have call predecessors, (27), 116 states have return successors, (373), 84 states have call predecessors, (373), 26 states have call successors, (373) [2023-03-31 22:03:32,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5634 states to 5634 states and 8051 transitions. [2023-03-31 22:03:32,299 INFO L78 Accepts]: Start accepts. Automaton has 5634 states and 8051 transitions. Word has length 23 [2023-03-31 22:03:32,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:03:32,299 INFO L495 AbstractCegarLoop]: Abstraction has 5634 states and 8051 transitions. [2023-03-31 22:03:32,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:03:32,300 INFO L276 IsEmpty]: Start isEmpty. Operand 5634 states and 8051 transitions. [2023-03-31 22:03:32,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-03-31 22:03:32,301 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:03:32,301 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:03:32,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 22:03:32,301 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:03:32,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:03:32,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1412405740, now seen corresponding path program 1 times [2023-03-31 22:03:32,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:03:32,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469885573] [2023-03-31 22:03:32,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:03:32,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:03:32,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:03:32,445 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 22:03:32,445 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:03:32,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469885573] [2023-03-31 22:03:32,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469885573] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:03:32,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745112774] [2023-03-31 22:03:32,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:03:32,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:03:32,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:03:32,448 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 22:03:32,449 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 22:03:32,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:03:32,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 22:03:32,552 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:03:32,627 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 22:03:32,627 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 22:03:32,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745112774] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:03:32,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 22:03:32,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-03-31 22:03:32,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530525744] [2023-03-31 22:03:32,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:03:32,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:03:32,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:03:32,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:03:32,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:03:32,629 INFO L87 Difference]: Start difference. First operand 5634 states and 8051 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 22:03:36,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:03:36,848 INFO L93 Difference]: Finished difference Result 17148 states and 25308 transitions. [2023-03-31 22:03:36,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 22:03:36,849 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 41 [2023-03-31 22:03:36,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:03:36,888 INFO L225 Difference]: With dead ends: 17148 [2023-03-31 22:03:36,888 INFO L226 Difference]: Without dead ends: 11519 [2023-03-31 22:03:36,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-03-31 22:03:36,909 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 2042 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 4474 mSolverCounterSat, 1061 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2042 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 5535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1061 IncrementalHoareTripleChecker+Valid, 4474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-03-31 22:03:36,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2042 Valid, 103 Invalid, 5535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1061 Valid, 4474 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2023-03-31 22:03:36,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11519 states. [2023-03-31 22:03:37,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11519 to 10645. [2023-03-31 22:03:37,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10645 states, 10328 states have (on average 1.2574554608830364) internal successors, (12987), 10410 states have internal predecessors, (12987), 49 states have call successors, (49), 49 states have call predecessors, (49), 267 states have return successors, (1161), 185 states have call predecessors, (1161), 48 states have call successors, (1161) [2023-03-31 22:03:37,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10645 states to 10645 states and 14197 transitions. [2023-03-31 22:03:37,155 INFO L78 Accepts]: Start accepts. Automaton has 10645 states and 14197 transitions. Word has length 41 [2023-03-31 22:03:37,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:03:37,155 INFO L495 AbstractCegarLoop]: Abstraction has 10645 states and 14197 transitions. [2023-03-31 22:03:37,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 22:03:37,155 INFO L276 IsEmpty]: Start isEmpty. Operand 10645 states and 14197 transitions. [2023-03-31 22:03:37,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-03-31 22:03:37,162 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:03:37,162 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] [2023-03-31 22:03:37,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 22:03:37,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:03:37,370 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:03:37,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:03:37,371 INFO L85 PathProgramCache]: Analyzing trace with hash -2109029690, now seen corresponding path program 1 times [2023-03-31 22:03:37,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:03:37,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793054982] [2023-03-31 22:03:37,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:03:37,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:03:37,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:03:37,724 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:03:37,725 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:03:37,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793054982] [2023-03-31 22:03:37,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793054982] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:03:37,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245245398] [2023-03-31 22:03:37,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:03:37,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:03:37,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:03:37,729 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 22:03:37,739 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 22:03:37,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:03:37,814 INFO L262 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 11 conjunts are in the unsatisfiable core [2023-03-31 22:03:37,817 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:03:37,926 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 22:03:37,926 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 22:03:37,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245245398] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:03:37,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 22:03:37,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2023-03-31 22:03:37,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963154713] [2023-03-31 22:03:37,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:03:37,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:03:37,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:03:37,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:03:37,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-03-31 22:03:37,928 INFO L87 Difference]: Start difference. First operand 10645 states and 14197 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 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 22:03:41,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:03:41,551 INFO L93 Difference]: Finished difference Result 19718 states and 26897 transitions. [2023-03-31 22:03:41,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:03:41,552 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 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 70 [2023-03-31 22:03:41,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:03:41,579 INFO L225 Difference]: With dead ends: 19718 [2023-03-31 22:03:41,580 INFO L226 Difference]: Without dead ends: 11456 [2023-03-31 22:03:41,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-03-31 22:03:41,592 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 1952 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 4517 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1952 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 4655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 4517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-03-31 22:03:41,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1952 Valid, 117 Invalid, 4655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 4517 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-03-31 22:03:41,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11456 states. [2023-03-31 22:03:41,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11456 to 11052. [2023-03-31 22:03:41,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11052 states, 10677 states have (on average 1.2486653554369205) internal successors, (13332), 10787 states have internal predecessors, (13332), 50 states have call successors, (50), 50 states have call predecessors, (50), 324 states have return successors, (1302), 214 states have call predecessors, (1302), 49 states have call successors, (1302) [2023-03-31 22:03:41,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11052 states to 11052 states and 14684 transitions. [2023-03-31 22:03:41,780 INFO L78 Accepts]: Start accepts. Automaton has 11052 states and 14684 transitions. Word has length 70 [2023-03-31 22:03:41,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:03:41,782 INFO L495 AbstractCegarLoop]: Abstraction has 11052 states and 14684 transitions. [2023-03-31 22:03:41,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 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 22:03:41,782 INFO L276 IsEmpty]: Start isEmpty. Operand 11052 states and 14684 transitions. [2023-03-31 22:03:41,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-03-31 22:03:41,784 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:03:41,784 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:03:41,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 22:03:41,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:03:41,991 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:03:41,992 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:03:41,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1578215822, now seen corresponding path program 1 times [2023-03-31 22:03:41,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:03:41,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696210515] [2023-03-31 22:03:41,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:03:41,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:03:42,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:03:42,123 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-03-31 22:03:42,123 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:03:42,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696210515] [2023-03-31 22:03:42,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696210515] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:03:42,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:03:42,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:03:42,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500055273] [2023-03-31 22:03:42,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:03:42,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:03:42,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:03:42,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:03:42,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:03:42,124 INFO L87 Difference]: Start difference. First operand 11052 states and 14684 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 22:03:44,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:03:44,696 INFO L93 Difference]: Finished difference Result 23504 states and 32518 transitions. [2023-03-31 22:03:44,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:03:44,696 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 75 [2023-03-31 22:03:44,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:03:44,729 INFO L225 Difference]: With dead ends: 23504 [2023-03-31 22:03:44,729 INFO L226 Difference]: Without dead ends: 13106 [2023-03-31 22:03:44,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:03:44,748 INFO L413 NwaCegarLoop]: 959 mSDtfsCounter, 852 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 2069 mSolverCounterSat, 654 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 852 SdHoareTripleChecker+Valid, 987 SdHoareTripleChecker+Invalid, 2723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 654 IncrementalHoareTripleChecker+Valid, 2069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-03-31 22:03:44,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [852 Valid, 987 Invalid, 2723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [654 Valid, 2069 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-03-31 22:03:44,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13106 states. [2023-03-31 22:03:44,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13106 to 13042. [2023-03-31 22:03:44,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13042 states, 12646 states have (on average 1.2290842954293848) internal successors, (15543), 12759 states have internal predecessors, (15543), 59 states have call successors, (59), 59 states have call predecessors, (59), 336 states have return successors, (1489), 223 states have call predecessors, (1489), 58 states have call successors, (1489) [2023-03-31 22:03:44,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13042 states to 13042 states and 17091 transitions. [2023-03-31 22:03:44,939 INFO L78 Accepts]: Start accepts. Automaton has 13042 states and 17091 transitions. Word has length 75 [2023-03-31 22:03:44,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:03:44,940 INFO L495 AbstractCegarLoop]: Abstraction has 13042 states and 17091 transitions. [2023-03-31 22:03:44,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 22:03:44,940 INFO L276 IsEmpty]: Start isEmpty. Operand 13042 states and 17091 transitions. [2023-03-31 22:03:44,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-03-31 22:03:44,942 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:03:44,942 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:03:44,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-03-31 22:03:44,942 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:03:44,942 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:03:44,942 INFO L85 PathProgramCache]: Analyzing trace with hash -801594266, now seen corresponding path program 1 times [2023-03-31 22:03:44,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:03:44,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475910225] [2023-03-31 22:03:44,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:03:44,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:03:44,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:03:45,073 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-03-31 22:03:45,073 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:03:45,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475910225] [2023-03-31 22:03:45,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475910225] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:03:45,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:03:45,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:03:45,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010041594] [2023-03-31 22:03:45,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:03:45,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:03:45,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:03:45,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:03:45,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:03:45,075 INFO L87 Difference]: Start difference. First operand 13042 states and 17091 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 22:03:47,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:03:47,905 INFO L93 Difference]: Finished difference Result 36106 states and 49630 transitions. [2023-03-31 22:03:47,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:03:47,906 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 79 [2023-03-31 22:03:47,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:03:47,957 INFO L225 Difference]: With dead ends: 36106 [2023-03-31 22:03:47,958 INFO L226 Difference]: Without dead ends: 23718 [2023-03-31 22:03:47,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:03:47,982 INFO L413 NwaCegarLoop]: 1217 mSDtfsCounter, 701 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 2215 mSolverCounterSat, 674 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 701 SdHoareTripleChecker+Valid, 1245 SdHoareTripleChecker+Invalid, 2889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 674 IncrementalHoareTripleChecker+Valid, 2215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-03-31 22:03:47,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [701 Valid, 1245 Invalid, 2889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [674 Valid, 2215 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-03-31 22:03:48,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23718 states. [2023-03-31 22:03:48,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23718 to 21099. [2023-03-31 22:03:48,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21099 states, 20524 states have (on average 1.1952348470083805) internal successors, (24531), 20688 states have internal predecessors, (24531), 97 states have call successors, (97), 97 states have call predecessors, (97), 477 states have return successors, (3158), 313 states have call predecessors, (3158), 96 states have call successors, (3158) [2023-03-31 22:03:48,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21099 states to 21099 states and 27786 transitions. [2023-03-31 22:03:48,275 INFO L78 Accepts]: Start accepts. Automaton has 21099 states and 27786 transitions. Word has length 79 [2023-03-31 22:03:48,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:03:48,275 INFO L495 AbstractCegarLoop]: Abstraction has 21099 states and 27786 transitions. [2023-03-31 22:03:48,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 22:03:48,275 INFO L276 IsEmpty]: Start isEmpty. Operand 21099 states and 27786 transitions. [2023-03-31 22:03:48,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-03-31 22:03:48,276 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:03:48,276 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:03:48,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-03-31 22:03:48,276 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:03:48,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:03:48,277 INFO L85 PathProgramCache]: Analyzing trace with hash -702675656, now seen corresponding path program 1 times [2023-03-31 22:03:48,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:03:48,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930044895] [2023-03-31 22:03:48,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:03:48,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:03:48,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:03:48,435 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 54 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-03-31 22:03:48,435 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:03:48,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930044895] [2023-03-31 22:03:48,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930044895] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:03:48,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969842531] [2023-03-31 22:03:48,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:03:48,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:03:48,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:03:48,436 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:03:48,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 22:03:48,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:03:48,550 INFO L262 TraceCheckSpWp]: Trace formula consists of 702 conjuncts, 12 conjunts are in the unsatisfiable core [2023-03-31 22:03:48,554 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:03:48,648 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-03-31 22:03:48,648 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:03:48,911 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-03-31 22:03:48,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969842531] provided 1 perfect and 1 imperfect interpolant sequences [2023-03-31 22:03:48,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-03-31 22:03:48,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 9 [2023-03-31 22:03:48,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898650634] [2023-03-31 22:03:48,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:03:48,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:03:48,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:03:48,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:03:48,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-03-31 22:03:48,913 INFO L87 Difference]: Start difference. First operand 21099 states and 27786 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 22:03:52,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:03:52,438 INFO L93 Difference]: Finished difference Result 51416 states and 70197 transitions. [2023-03-31 22:03:52,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 22:03:52,443 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 85 [2023-03-31 22:03:52,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:03:52,510 INFO L225 Difference]: With dead ends: 51416 [2023-03-31 22:03:52,510 INFO L226 Difference]: Without dead ends: 30971 [2023-03-31 22:03:52,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 162 SyntacticMatches, 9 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-03-31 22:03:52,542 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 2562 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 3348 mSolverCounterSat, 1016 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2562 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 4364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1016 IncrementalHoareTripleChecker+Valid, 3348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-03-31 22:03:52,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2562 Valid, 78 Invalid, 4364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1016 Valid, 3348 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-03-31 22:03:52,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30971 states. [2023-03-31 22:03:52,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30971 to 30385. [2023-03-31 22:03:52,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30385 states, 29461 states have (on average 1.1845830080445334) internal successors, (34899), 29743 states have internal predecessors, (34899), 137 states have call successors, (137), 137 states have call predecessors, (137), 786 states have return successors, (5091), 504 states have call predecessors, (5091), 136 states have call successors, (5091) [2023-03-31 22:03:52,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30385 states to 30385 states and 40127 transitions. [2023-03-31 22:03:52,966 INFO L78 Accepts]: Start accepts. Automaton has 30385 states and 40127 transitions. Word has length 85 [2023-03-31 22:03:52,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:03:52,969 INFO L495 AbstractCegarLoop]: Abstraction has 30385 states and 40127 transitions. [2023-03-31 22:03:52,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 22:03:52,970 INFO L276 IsEmpty]: Start isEmpty. Operand 30385 states and 40127 transitions. [2023-03-31 22:03:52,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-03-31 22:03:52,973 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:03:52,974 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:03:52,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 22:03:53,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:03:53,179 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:03:53,185 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:03:53,185 INFO L85 PathProgramCache]: Analyzing trace with hash -970200476, now seen corresponding path program 1 times [2023-03-31 22:03:53,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:03:53,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507039208] [2023-03-31 22:03:53,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:03:53,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:03:53,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:03:53,305 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 74 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-03-31 22:03:53,305 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:03:53,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507039208] [2023-03-31 22:03:53,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507039208] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:03:53,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430922613] [2023-03-31 22:03:53,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:03:53,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:03:53,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:03:53,306 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:03:53,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 22:03:53,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:03:53,426 INFO L262 TraceCheckSpWp]: Trace formula consists of 711 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 22:03:53,431 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:03:53,466 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 74 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-03-31 22:03:53,466 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:03:53,540 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 74 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-03-31 22:03:53,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430922613] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:03:53,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [715111404] [2023-03-31 22:03:53,556 INFO L159 IcfgInterpreter]: Started Sifa with 41 locations of interest [2023-03-31 22:03:53,556 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:03:53,558 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:03:53,561 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:03:53,561 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:03:53,669 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 49 for LOIs [2023-03-31 22:03:53,802 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 49 [2023-03-31 22:03:54,050 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 9409 conjuctions. This might take some time... [2023-03-31 22:03:54,161 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 41 conjuctions. [2023-03-31 22:03:54,178 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2023-03-31 22:03:54,907 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 56 for LOIs [2023-03-31 22:03:55,079 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 50 [2023-03-31 22:03:56,422 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 35565 conjuctions. This might take some time... [2023-03-31 22:03:58,923 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 200 conjuctions.