/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 OctagonDomain -i ../sv-benchmarks/c/eca-rers2012/Problem12_label17.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:00:40,286 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:00:40,287 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:00:40,312 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:00:40,312 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:00:40,314 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:00:40,318 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:00:40,321 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:00:40,322 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:00:40,326 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:00:40,327 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:00:40,328 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:00:40,328 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:00:40,330 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:00:40,332 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:00:40,333 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:00:40,333 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:00:40,334 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:00:40,336 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:00:40,340 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:00:40,341 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:00:40,342 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:00:40,343 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:00:40,344 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:00:40,350 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:00:40,350 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:00:40,350 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:00:40,352 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:00:40,352 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:00:40,352 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:00:40,353 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:00:40,353 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:00:40,354 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:00:40,355 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:00:40,355 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:00:40,356 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:00:40,356 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:00:40,356 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:00:40,356 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:00:40,357 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:00:40,358 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:00:40,359 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 04:00:40,387 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:00:40,387 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:00:40,388 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:00:40,388 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:00:40,388 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:00:40,389 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:00:40,389 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:00:40,389 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:00:40,389 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:00:40,389 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:00:40,390 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:00:40,390 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:00:40,390 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:00:40,390 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:00:40,390 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:00:40,390 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:00:40,390 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:00:40,391 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:00:40,391 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:00:40,391 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:00:40,391 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:00:40,391 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:00:40,392 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:00:40,392 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:00:40,392 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:00:40,392 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:00:40,392 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:00:40,392 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:00:40,393 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:00:40,393 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:00:40,393 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:00:40,393 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:00:40,393 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:00:40,393 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:00:40,393 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:00:40,394 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:00:40,394 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:00:40,394 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:00:40,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:00:40,394 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:00:40,394 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:00:40,394 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:00:40,592 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:00:40,615 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:00:40,618 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:00:40,618 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:00:40,619 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:00:40,620 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label17.c [2023-04-01 04:00:41,765 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:00:42,124 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:00:42,125 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label17.c [2023-04-01 04:00:42,147 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3af023f61/9eb0fcc099844395a92a22146d7952b7/FLAG1e4a40754 [2023-04-01 04:00:42,160 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3af023f61/9eb0fcc099844395a92a22146d7952b7 [2023-04-01 04:00:42,162 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:00:42,163 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:00:42,165 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:00:42,165 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:00:42,167 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:00:42,168 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:00:42" (1/1) ... [2023-04-01 04:00:42,169 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d72bb84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:00:42, skipping insertion in model container [2023-04-01 04:00:42,169 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:00:42" (1/1) ... [2023-04-01 04:00:42,173 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:00:42,260 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:00:42,477 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label17.c[5134,5147] [2023-04-01 04:00:43,097 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:00:43,105 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:00:43,126 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label17.c[5134,5147] [2023-04-01 04:00:43,420 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:00:43,437 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:00:43,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:00:43 WrapperNode [2023-04-01 04:00:43,437 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:00:43,439 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:00:43,439 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:00:43,439 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:00:43,447 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:00:43" (1/1) ... [2023-04-01 04:00:43,447 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:00:43" (1/1) ... [2023-04-01 04:00:43,495 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:00:43" (1/1) ... [2023-04-01 04:00:43,495 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:00:43" (1/1) ... [2023-04-01 04:00:43,581 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:00:43" (1/1) ... [2023-04-01 04:00:43,619 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:00:43" (1/1) ... [2023-04-01 04:00:43,667 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:00:43" (1/1) ... [2023-04-01 04:00:43,678 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:00:43" (1/1) ... [2023-04-01 04:00:43,718 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:00:43,719 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:00:43,719 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:00:43,719 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:00:43,720 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:00:43" (1/1) ... [2023-04-01 04:00:43,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:00:43,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:00:43,763 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 04:00:43,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 04:00:43,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:00:43,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:00:43,800 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:00:43,800 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:00:43,800 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:00:43,800 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 04:00:43,800 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 04:00:43,800 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:00:43,800 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:00:43,800 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:00:43,800 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 04:00:43,800 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 04:00:43,800 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:00:43,801 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:00:43,801 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:00:43,801 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:00:43,801 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:00:43,801 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:00:43,801 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:00:43,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:00:43,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:00:43,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:00:43,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:00:43,801 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:00:43,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:00:43,874 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:00:43,875 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:00:47,129 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:00:47,635 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:00:47,635 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:00:47,640 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:00:47 BoogieIcfgContainer [2023-04-01 04:00:47,640 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:00:47,643 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:00:47,643 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:00:47,645 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:00:47,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:00:42" (1/3) ... [2023-04-01 04:00:47,645 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a8a13a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:00:47, skipping insertion in model container [2023-04-01 04:00:47,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:00:43" (2/3) ... [2023-04-01 04:00:47,646 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a8a13a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:00:47, skipping insertion in model container [2023-04-01 04:00:47,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:00:47" (3/3) ... [2023-04-01 04:00:47,647 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label17.c [2023-04-01 04:00:47,660 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:00:47,660 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:00:47,717 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:00:47,723 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;@57905ba7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:00:47,724 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:00:47,731 INFO L276 IsEmpty]: Start isEmpty. Operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 04:00:47,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:00:47,737 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:00:47,737 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:00:47,738 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:00:47,742 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:00:47,742 INFO L85 PathProgramCache]: Analyzing trace with hash 636342273, now seen corresponding path program 1 times [2023-04-01 04:00:47,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:00:47,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828313136] [2023-04-01 04:00:47,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:00:47,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:00:47,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:00:48,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:00:48,011 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:00:48,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828313136] [2023-04-01 04:00:48,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828313136] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:00:48,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:00:48,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:00:48,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277536652] [2023-04-01 04:00:48,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:00:48,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:00:48,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:00:48,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:00:48,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:00:48,045 INFO L87 Difference]: Start difference. First operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:00:50,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:00:50,816 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-04-01 04:00:50,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:00:50,818 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 04:00:50,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:00:50,833 INFO L225 Difference]: With dead ends: 2068 [2023-04-01 04:00:50,833 INFO L226 Difference]: Without dead ends: 1371 [2023-04-01 04:00:50,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:00:50,840 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 846 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 1995 mSolverCounterSat, 884 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 846 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 2879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 884 IncrementalHoareTripleChecker+Valid, 1995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-04-01 04:00:50,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [846 Valid, 217 Invalid, 2879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [884 Valid, 1995 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-04-01 04:00:50,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-04-01 04:00:50,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1368. [2023-04-01 04:00:50,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 1350 states have (on average 1.857037037037037) internal successors, (2507), 1350 states have internal predecessors, (2507), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2023-04-01 04:00:50,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 2530 transitions. [2023-04-01 04:00:50,924 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 2530 transitions. Word has length 11 [2023-04-01 04:00:50,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:00:50,925 INFO L495 AbstractCegarLoop]: Abstraction has 1368 states and 2530 transitions. [2023-04-01 04:00:50,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:00:50,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 2530 transitions. [2023-04-01 04:00:50,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 04:00:50,926 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:00:50,926 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] [2023-04-01 04:00:50,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:00:50,927 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:00:50,927 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:00:50,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1811488860, now seen corresponding path program 1 times [2023-04-01 04:00:50,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:00:50,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278064986] [2023-04-01 04:00:50,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:00:50,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:00:50,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:00:51,107 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:00:51,107 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:00:51,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278064986] [2023-04-01 04:00:51,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278064986] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:00:51,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:00:51,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:00:51,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727514929] [2023-04-01 04:00:51,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:00:51,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:00:51,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:00:51,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:00:51,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:00:51,110 INFO L87 Difference]: Start difference. First operand 1368 states and 2530 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:00:54,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:00:54,386 INFO L93 Difference]: Finished difference Result 4138 states and 7702 transitions. [2023-04-01 04:00:54,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:00:54,387 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 25 [2023-04-01 04:00:54,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:00:54,399 INFO L225 Difference]: With dead ends: 4138 [2023-04-01 04:00:54,400 INFO L226 Difference]: Without dead ends: 2775 [2023-04-01 04:00:54,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:00:54,409 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 2488 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 3906 mSolverCounterSat, 910 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2488 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 4816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 910 IncrementalHoareTripleChecker+Valid, 3906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:00:54,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2488 Valid, 118 Invalid, 4816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [910 Valid, 3906 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-04-01 04:00:54,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2775 states. [2023-04-01 04:00:54,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2775 to 2757. [2023-04-01 04:00:54,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2757 states, 2715 states have (on average 1.6976058931860036) internal successors, (4609), 2719 states have internal predecessors, (4609), 15 states have call successors, (15), 15 states have call predecessors, (15), 26 states have return successors, (77), 22 states have call predecessors, (77), 14 states have call successors, (77) [2023-04-01 04:00:54,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2757 states to 2757 states and 4701 transitions. [2023-04-01 04:00:54,473 INFO L78 Accepts]: Start accepts. Automaton has 2757 states and 4701 transitions. Word has length 25 [2023-04-01 04:00:54,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:00:54,473 INFO L495 AbstractCegarLoop]: Abstraction has 2757 states and 4701 transitions. [2023-04-01 04:00:54,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:00:54,473 INFO L276 IsEmpty]: Start isEmpty. Operand 2757 states and 4701 transitions. [2023-04-01 04:00:54,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-01 04:00:54,474 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:00:54,474 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] [2023-04-01 04:00:54,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:00:54,474 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:00:54,475 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:00:54,475 INFO L85 PathProgramCache]: Analyzing trace with hash -224741163, now seen corresponding path program 1 times [2023-04-01 04:00:54,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:00:54,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822942383] [2023-04-01 04:00:54,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:00:54,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:00:54,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:00:54,600 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:00:54,600 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:00:54,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822942383] [2023-04-01 04:00:54,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822942383] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:00:54,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:00:54,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:00:54,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653300680] [2023-04-01 04:00:54,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:00:54,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:00:54,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:00:54,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:00:54,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:00:54,602 INFO L87 Difference]: Start difference. First operand 2757 states and 4701 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:00:58,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:00:58,054 INFO L93 Difference]: Finished difference Result 7729 states and 13220 transitions. [2023-04-01 04:00:58,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:00:58,070 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 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 30 [2023-04-01 04:00:58,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:00:58,093 INFO L225 Difference]: With dead ends: 7729 [2023-04-01 04:00:58,093 INFO L226 Difference]: Without dead ends: 4977 [2023-04-01 04:00:58,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:00:58,104 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 2452 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 3744 mSolverCounterSat, 1261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2452 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 5005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1261 IncrementalHoareTripleChecker+Valid, 3744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-04-01 04:00:58,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2452 Valid, 95 Invalid, 5005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1261 Valid, 3744 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-04-01 04:00:58,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4977 states. [2023-04-01 04:00:58,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4977 to 4896. [2023-04-01 04:00:58,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4896 states, 4789 states have (on average 1.579661724785968) internal successors, (7565), 4809 states have internal predecessors, (7565), 24 states have call successors, (24), 24 states have call predecessors, (24), 82 states have return successors, (335), 62 states have call predecessors, (335), 23 states have call successors, (335) [2023-04-01 04:00:58,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4896 states to 4896 states and 7924 transitions. [2023-04-01 04:00:58,219 INFO L78 Accepts]: Start accepts. Automaton has 4896 states and 7924 transitions. Word has length 30 [2023-04-01 04:00:58,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:00:58,220 INFO L495 AbstractCegarLoop]: Abstraction has 4896 states and 7924 transitions. [2023-04-01 04:00:58,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:00:58,220 INFO L276 IsEmpty]: Start isEmpty. Operand 4896 states and 7924 transitions. [2023-04-01 04:00:58,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 04:00:58,222 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:00:58,222 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:00:58,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:00:58,222 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:00:58,222 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:00:58,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1406240931, now seen corresponding path program 1 times [2023-04-01 04:00:58,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:00:58,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704791344] [2023-04-01 04:00:58,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:00:58,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:00:58,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:00:58,408 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:00:58,408 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:00:58,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704791344] [2023-04-01 04:00:58,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704791344] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:00:58,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186663978] [2023-04-01 04:00:58,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:00:58,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:00:58,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:00:58,413 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:00:58,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 04:00:58,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:00:58,508 INFO L262 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:00:58,512 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:00:58,576 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:00:58,577 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:00:58,664 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:00:58,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186663978] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:00:58,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1598753635] [2023-04-01 04:00:58,679 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-04-01 04:00:58,679 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:00:58,682 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:00:58,686 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:00:58,686 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:00:58,833 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 52 for LOIs [2023-04-01 04:00:58,959 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 34 [2023-04-01 04:00:59,881 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 47324 conjuctions. This might take some time... [2023-04-01 04:01:03,234 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 681 conjuctions. [2023-04-01 04:01:12,027 WARN L223 SmtUtils]: Spent 5.12s on a formula simplification that was a NOOP. DAG size: 638 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-01 04:01:38,512 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 27