/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/Problem19_label17.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:30:28,405 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:30:28,407 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:30:28,438 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:30:28,438 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:30:28,440 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:30:28,443 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:30:28,444 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:30:28,445 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:30:28,449 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:30:28,450 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:30:28,451 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:30:28,452 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:30:28,453 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:30:28,454 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:30:28,455 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:30:28,455 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:30:28,456 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:30:28,458 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:30:28,462 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:30:28,463 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:30:28,463 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:30:28,464 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:30:28,465 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:30:28,471 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 22:30:28,471 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 22:30:28,471 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 22:30:28,472 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 22:30:28,473 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 22:30:28,473 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 22:30:28,473 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:30:28,474 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:30:28,475 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:30:28,475 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:30:28,476 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:30:28,476 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:30:28,476 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:30:28,476 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:30:28,476 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:30:28,477 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:30:28,477 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:30:28,478 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 22:30:28,500 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:30:28,500 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:30:28,501 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:30:28,501 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:30:28,502 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:30:28,502 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:30:28,502 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:30:28,502 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:30:28,502 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:30:28,502 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:30:28,503 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:30:28,503 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:30:28,503 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:30:28,503 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:30:28,503 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:30:28,503 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:30:28,503 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:30:28,504 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:30:28,504 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:30:28,504 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:30:28,504 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:30:28,504 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:30:28,504 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:30:28,505 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:30:28,505 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:30:28,505 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:30:28,505 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:30:28,505 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:30:28,505 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:30:28,505 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:30:28,505 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:30:28,506 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:30:28,506 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:30:28,506 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:30:28,506 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:30:28,506 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:30:28,506 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:30:28,506 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:30:28,506 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:30:28,506 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:30:28,507 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:30:28,507 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:30:28,676 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:30:28,693 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:30:28,696 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:30:28,697 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:30:28,698 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:30:28,699 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label17.c [2023-03-31 22:30:29,639 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:30:30,074 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:30:30,075 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label17.c [2023-03-31 22:30:30,110 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e661cd202/3fddd53306054b95a952bb970babaa0a/FLAGab06360be [2023-03-31 22:30:30,123 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e661cd202/3fddd53306054b95a952bb970babaa0a [2023-03-31 22:30:30,125 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:30:30,126 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:30:30,128 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:30:30,129 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:30:30,131 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:30:30,131 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:30:30" (1/1) ... [2023-03-31 22:30:30,133 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40724b4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:30:30, skipping insertion in model container [2023-03-31 22:30:30,133 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:30:30" (1/1) ... [2023-03-31 22:30:30,137 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:30:30,253 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:30:30,482 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/Problem19_label17.c[1799,1812] [2023-03-31 22:30:31,405 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:30:31,412 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:30:31,429 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/Problem19_label17.c[1799,1812] [2023-03-31 22:30:31,933 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:30:31,958 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:30:31,958 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:30:31 WrapperNode [2023-03-31 22:30:31,958 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:30:31,959 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:30:31,959 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:30:31,959 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:30:31,967 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:30:31" (1/1) ... [2023-03-31 22:30:31,967 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:30:31" (1/1) ... [2023-03-31 22:30:32,034 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:30:31" (1/1) ... [2023-03-31 22:30:32,034 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:30:31" (1/1) ... [2023-03-31 22:30:32,190 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:30:31" (1/1) ... [2023-03-31 22:30:32,216 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:30:31" (1/1) ... [2023-03-31 22:30:32,284 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:30:31" (1/1) ... [2023-03-31 22:30:32,299 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:30:31" (1/1) ... [2023-03-31 22:30:32,338 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:30:32,339 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:30:32,340 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:30:32,340 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:30:32,341 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:30:31" (1/1) ... [2023-03-31 22:30:32,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:30:32,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:30:32,363 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 22:30:32,369 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 22:30:32,390 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:30:32,390 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:30:32,390 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:30:32,390 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 22:30:32,390 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 22:30:32,390 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-31 22:30:32,390 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-03-31 22:30:32,390 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-03-31 22:30:32,391 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-03-31 22:30:32,391 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:30:32,391 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 22:30:32,391 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 22:30:32,391 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-31 22:30:32,391 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-03-31 22:30:32,391 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-03-31 22:30:32,391 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-03-31 22:30:32,391 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:30:32,391 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:30:32,391 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:30:32,391 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:30:32,391 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:30:32,391 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:30:32,391 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:30:32,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:30:32,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:30:32,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:30:32,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:30:32,392 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:30:32,392 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:30:32,494 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:30:32,495 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:30:37,839 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:30:50,396 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:30:50,396 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 22:30:50,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:30:50 BoogieIcfgContainer [2023-03-31 22:30:50,399 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:30:50,401 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:30:50,401 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:30:50,403 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:30:50,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:30:30" (1/3) ... [2023-03-31 22:30:50,403 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6639a3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:30:50, skipping insertion in model container [2023-03-31 22:30:50,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:30:31" (2/3) ... [2023-03-31 22:30:50,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6639a3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:30:50, skipping insertion in model container [2023-03-31 22:30:50,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:30:50" (3/3) ... [2023-03-31 22:30:50,405 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label17.c [2023-03-31 22:30:50,417 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:30:50,417 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:30:50,477 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:30:50,482 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;@7502b7e5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:30:50,482 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:30:50,490 INFO L276 IsEmpty]: Start isEmpty. Operand has 1144 states, 1126 states have (on average 1.980461811722913) internal successors, (2230), 1127 states have internal predecessors, (2230), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-03-31 22:30:50,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 22:30:50,495 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:30:50,495 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:30:50,496 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:30:50,500 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:30:50,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1235638298, now seen corresponding path program 1 times [2023-03-31 22:30:50,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:30:50,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88947603] [2023-03-31 22:30:50,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:30:50,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:30:50,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:30:50,792 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 22:30:50,793 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:30:50,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88947603] [2023-03-31 22:30:50,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88947603] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:30:50,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:30:50,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:30:50,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529551374] [2023-03-31 22:30:50,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:30:50,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:30:50,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:30:50,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:30:50,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:30:50,833 INFO L87 Difference]: Start difference. First operand has 1144 states, 1126 states have (on average 1.980461811722913) internal successors, (2230), 1127 states have internal predecessors, (2230), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) 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 22:30:56,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:30:56,137 INFO L93 Difference]: Finished difference Result 3418 states and 6741 transitions. [2023-03-31 22:30:56,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:30:56,139 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 22:30:56,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:30:56,158 INFO L225 Difference]: With dead ends: 3418 [2023-03-31 22:30:56,158 INFO L226 Difference]: Without dead ends: 2271 [2023-03-31 22:30:56,165 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 22:30:56,168 INFO L413 NwaCegarLoop]: 702 mSDtfsCounter, 1265 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 3362 mSolverCounterSat, 1219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1265 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 4581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1219 IncrementalHoareTripleChecker+Valid, 3362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2023-03-31 22:30:56,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1265 Valid, 737 Invalid, 4581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1219 Valid, 3362 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2023-03-31 22:30:56,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2023-03-31 22:30:56,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 2269. [2023-03-31 22:30:56,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2269 states, 2243 states have (on average 1.6464556397681676) internal successors, (3693), 2243 states have internal predecessors, (3693), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (22), 12 states have call predecessors, (22), 12 states have call successors, (22) [2023-03-31 22:30:56,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2269 states to 2269 states and 3728 transitions. [2023-03-31 22:30:56,290 INFO L78 Accepts]: Start accepts. Automaton has 2269 states and 3728 transitions. Word has length 11 [2023-03-31 22:30:56,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:30:56,291 INFO L495 AbstractCegarLoop]: Abstraction has 2269 states and 3728 transitions. [2023-03-31 22:30:56,292 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 22:30:56,293 INFO L276 IsEmpty]: Start isEmpty. Operand 2269 states and 3728 transitions. [2023-03-31 22:30:56,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-03-31 22:30:56,295 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:30:56,295 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 22:30:56,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:30:56,295 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:30:56,296 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:30:56,296 INFO L85 PathProgramCache]: Analyzing trace with hash 545596150, now seen corresponding path program 1 times [2023-03-31 22:30:56,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:30:56,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395692197] [2023-03-31 22:30:56,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:30:56,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:30:56,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:30:56,467 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 22:30:56,467 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:30:56,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395692197] [2023-03-31 22:30:56,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395692197] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:30:56,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:30:56,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:30:56,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542895756] [2023-03-31 22:30:56,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:30:56,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:30:56,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:30:56,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:30:56,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:30:56,470 INFO L87 Difference]: Start difference. First operand 2269 states and 3728 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 22:31:03,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:31:03,583 INFO L93 Difference]: Finished difference Result 6943 states and 11442 transitions. [2023-03-31 22:31:03,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:31:03,586 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 22:31:03,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:31:03,608 INFO L225 Difference]: With dead ends: 6943 [2023-03-31 22:31:03,608 INFO L226 Difference]: Without dead ends: 4679 [2023-03-31 22:31:03,611 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 22:31:03,612 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 4036 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 6593 mSolverCounterSat, 1794 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4036 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 8387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1794 IncrementalHoareTripleChecker+Valid, 6593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2023-03-31 22:31:03,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4036 Valid, 181 Invalid, 8387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1794 Valid, 6593 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2023-03-31 22:31:03,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4679 states. [2023-03-31 22:31:03,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4679 to 4607. [2023-03-31 22:31:03,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4607 states, 4531 states have (on average 1.414036636504083) internal successors, (6407), 4537 states have internal predecessors, (6407), 23 states have call successors, (23), 23 states have call predecessors, (23), 52 states have return successors, (137), 46 states have call predecessors, (137), 22 states have call successors, (137) [2023-03-31 22:31:03,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4607 states to 4607 states and 6567 transitions. [2023-03-31 22:31:03,713 INFO L78 Accepts]: Start accepts. Automaton has 4607 states and 6567 transitions. Word has length 21 [2023-03-31 22:31:03,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:31:03,713 INFO L495 AbstractCegarLoop]: Abstraction has 4607 states and 6567 transitions. [2023-03-31 22:31:03,713 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 22:31:03,713 INFO L276 IsEmpty]: Start isEmpty. Operand 4607 states and 6567 transitions. [2023-03-31 22:31:03,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-03-31 22:31:03,714 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:31:03,714 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 22:31:03,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 22:31:03,714 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:31:03,714 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:31:03,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1722036961, now seen corresponding path program 1 times [2023-03-31 22:31:03,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:31:03,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551168415] [2023-03-31 22:31:03,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:31:03,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:31:03,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:31:03,833 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 22:31:03,833 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:31:03,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551168415] [2023-03-31 22:31:03,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551168415] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:31:03,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:31:03,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:31:03,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612393798] [2023-03-31 22:31:03,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:31:03,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:31:03,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:31:03,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:31:03,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:31:03,837 INFO L87 Difference]: Start difference. First operand 4607 states and 6567 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 22:31:09,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:31:09,821 INFO L93 Difference]: Finished difference Result 14148 states and 20540 transitions. [2023-03-31 22:31:09,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:31:09,822 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 22:31:09,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:31:09,854 INFO L225 Difference]: With dead ends: 14148 [2023-03-31 22:31:09,854 INFO L226 Difference]: Without dead ends: 9546 [2023-03-31 22:31:09,863 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 22:31:09,864 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 3495 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 7164 mSolverCounterSat, 1101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3495 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 8265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1101 IncrementalHoareTripleChecker+Valid, 7164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2023-03-31 22:31:09,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3495 Valid, 175 Invalid, 8265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1101 Valid, 7164 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2023-03-31 22:31:09,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9546 states. [2023-03-31 22:31:09,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9546 to 8592. [2023-03-31 22:31:10,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8592 states, 8362 states have (on average 1.4227457546041617) internal successors, (11897), 8395 states have internal predecessors, (11897), 40 states have call successors, (40), 40 states have call predecessors, (40), 189 states have return successors, (602), 156 states have call predecessors, (602), 39 states have call successors, (602) [2023-03-31 22:31:10,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8592 states to 8592 states and 12539 transitions. [2023-03-31 22:31:10,021 INFO L78 Accepts]: Start accepts. Automaton has 8592 states and 12539 transitions. Word has length 23 [2023-03-31 22:31:10,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:31:10,022 INFO L495 AbstractCegarLoop]: Abstraction has 8592 states and 12539 transitions. [2023-03-31 22:31:10,022 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 22:31:10,022 INFO L276 IsEmpty]: Start isEmpty. Operand 8592 states and 12539 transitions. [2023-03-31 22:31:10,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-03-31 22:31:10,023 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:31:10,023 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] [2023-03-31 22:31:10,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 22:31:10,023 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:31:10,023 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:31:10,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1536317801, now seen corresponding path program 1 times [2023-03-31 22:31:10,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:31:10,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811406240] [2023-03-31 22:31:10,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:31:10,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:31:10,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:31:10,147 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 22:31:10,148 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:31:10,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811406240] [2023-03-31 22:31:10,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811406240] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:31:10,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:31:10,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:31:10,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023559371] [2023-03-31 22:31:10,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:31:10,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:31:10,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:31:10,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:31:10,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:31:10,150 INFO L87 Difference]: Start difference. First operand 8592 states and 12539 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 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 22:31:16,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:31:16,650 INFO L93 Difference]: Finished difference Result 26245 states and 39095 transitions. [2023-03-31 22:31:16,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:31:16,651 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 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 33 [2023-03-31 22:31:16,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:31:16,709 INFO L225 Difference]: With dead ends: 26245 [2023-03-31 22:31:16,710 INFO L226 Difference]: Without dead ends: 17658 [2023-03-31 22:31:16,731 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 22:31:16,732 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 5995 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 6471 mSolverCounterSat, 703 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5995 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 7174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 703 IncrementalHoareTripleChecker+Valid, 6471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2023-03-31 22:31:16,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5995 Valid, 147 Invalid, 7174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [703 Valid, 6471 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2023-03-31 22:31:16,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17658 states. [2023-03-31 22:31:17,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17658 to 17126. [2023-03-31 22:31:17,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17126 states, 16569 states have (on average 1.3635705232663407) internal successors, (22593), 16669 states have internal predecessors, (22593), 76 states have call successors, (76), 76 states have call predecessors, (76), 480 states have return successors, (1564), 380 states have call predecessors, (1564), 75 states have call successors, (1564) [2023-03-31 22:31:17,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17126 states to 17126 states and 24233 transitions. [2023-03-31 22:31:17,065 INFO L78 Accepts]: Start accepts. Automaton has 17126 states and 24233 transitions. Word has length 33 [2023-03-31 22:31:17,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:31:17,065 INFO L495 AbstractCegarLoop]: Abstraction has 17126 states and 24233 transitions. [2023-03-31 22:31:17,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 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 22:31:17,066 INFO L276 IsEmpty]: Start isEmpty. Operand 17126 states and 24233 transitions. [2023-03-31 22:31:17,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-03-31 22:31:17,069 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:31:17,069 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:31:17,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 22:31:17,069 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:31:17,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:31:17,069 INFO L85 PathProgramCache]: Analyzing trace with hash 601199297, now seen corresponding path program 1 times [2023-03-31 22:31:17,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:31:17,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171514822] [2023-03-31 22:31:17,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:31:17,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:31:17,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:31:17,228 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 22:31:17,229 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:31:17,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171514822] [2023-03-31 22:31:17,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171514822] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:31:17,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657447082] [2023-03-31 22:31:17,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:31:17,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:31:17,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:31:17,233 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 22:31:17,236 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 22:31:17,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:31:17,336 INFO L262 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 22:31:17,341 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:31:17,445 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 22:31:17,445 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 22:31:17,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657447082] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:31:17,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 22:31:17,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-03-31 22:31:17,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622616321] [2023-03-31 22:31:17,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:31:17,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:31:17,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:31:17,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:31:17,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:31:17,447 INFO L87 Difference]: Start difference. First operand 17126 states and 24233 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 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 22:31:24,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:31:24,256 INFO L93 Difference]: Finished difference Result 46953 states and 69710 transitions. [2023-03-31 22:31:24,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:31:24,257 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 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 60 [2023-03-31 22:31:24,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:31:24,351 INFO L225 Difference]: With dead ends: 46953 [2023-03-31 22:31:24,351 INFO L226 Difference]: Without dead ends: 29832 [2023-03-31 22:31:24,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-03-31 22:31:24,390 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 3504 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 5917 mSolverCounterSat, 3178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3504 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 9095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3178 IncrementalHoareTripleChecker+Valid, 5917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2023-03-31 22:31:24,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3504 Valid, 135 Invalid, 9095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3178 Valid, 5917 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2023-03-31 22:31:24,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29832 states. [2023-03-31 22:31:24,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29832 to 29383. [2023-03-31 22:31:24,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29383 states, 28350 states have (on average 1.3067372134038802) internal successors, (37046), 28547 states have internal predecessors, (37046), 126 states have call successors, (126), 126 states have call predecessors, (126), 906 states have return successors, (3790), 709 states have call predecessors, (3790), 125 states have call successors, (3790) [2023-03-31 22:31:24,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29383 states to 29383 states and 40962 transitions. [2023-03-31 22:31:24,878 INFO L78 Accepts]: Start accepts. Automaton has 29383 states and 40962 transitions. Word has length 60 [2023-03-31 22:31:24,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:31:24,879 INFO L495 AbstractCegarLoop]: Abstraction has 29383 states and 40962 transitions. [2023-03-31 22:31:24,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 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 22:31:24,879 INFO L276 IsEmpty]: Start isEmpty. Operand 29383 states and 40962 transitions. [2023-03-31 22:31:24,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2023-03-31 22:31:24,889 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:31:24,889 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:31:24,900 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 22:31:25,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:31:25,097 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:31:25,098 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:31:25,098 INFO L85 PathProgramCache]: Analyzing trace with hash -65439165, now seen corresponding path program 1 times [2023-03-31 22:31:25,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:31:25,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120477364] [2023-03-31 22:31:25,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:31:25,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:31:25,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:31:25,474 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 56 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-03-31 22:31:25,474 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:31:25,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120477364] [2023-03-31 22:31:25,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120477364] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:31:25,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910941659] [2023-03-31 22:31:25,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:31:25,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:31:25,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:31:25,476 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 22:31:25,478 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 22:31:25,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:31:25,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 22:31:25,639 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:31:25,721 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 127 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 22:31:25,722 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:31:25,886 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 56 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-03-31 22:31:25,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910941659] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:31:25,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1461167603] [2023-03-31 22:31:25,909 INFO L159 IcfgInterpreter]: Started Sifa with 171 locations of interest [2023-03-31 22:31:25,909 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:31:25,912 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:31:25,915 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:31:25,915 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:31:26,059 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 56 for LOIs [2023-03-31 22:31:26,526 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 57