/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_label47.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:02:47,361 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:02:47,362 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:02:47,399 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:02:47,400 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:02:47,402 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:02:47,403 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:02:47,404 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:02:47,406 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:02:47,406 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:02:47,407 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:02:47,408 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:02:47,408 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:02:47,413 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:02:47,414 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:02:47,415 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:02:47,415 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:02:47,416 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:02:47,417 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:02:47,418 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:02:47,419 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:02:47,424 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:02:47,426 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:02:47,427 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:02:47,437 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:02:47,437 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:02:47,437 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:02:47,438 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:02:47,438 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:02:47,439 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:02:47,439 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:02:47,440 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:02:47,440 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:02:47,441 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:02:47,442 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:02:47,442 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:02:47,442 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:02:47,442 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:02:47,443 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:02:47,443 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:02:47,444 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:02:47,448 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 04:02:47,478 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:02:47,478 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:02:47,478 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:02:47,478 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:02:47,479 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:02:47,479 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:02:47,479 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:02:47,479 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:02:47,480 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:02:47,480 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:02:47,480 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:02:47,480 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:02:47,480 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:02:47,480 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:02:47,480 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:02:47,480 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:02:47,481 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:02:47,481 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:02:47,481 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:02:47,481 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:02:47,481 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:02:47,482 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:02:47,482 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:02:47,482 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:02:47,482 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:02:47,482 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:02:47,482 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:02:47,482 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:02:47,483 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:02:47,483 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:02:47,483 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:02:47,483 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:02:47,483 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:02:47,483 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:02:47,483 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:02:47,484 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:02:47,484 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:02:47,484 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:02:47,484 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:02:47,484 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:02:47,484 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:02:47,484 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:02:47,687 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:02:47,712 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:02:47,714 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:02:47,715 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:02:47,716 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:02:47,717 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label47.c [2023-04-01 04:02:48,915 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:02:49,309 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:02:49,309 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label47.c [2023-04-01 04:02:49,338 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1670f0197/8054eb92510e45f48d5ea61403a702f9/FLAGa155308f5 [2023-04-01 04:02:49,353 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1670f0197/8054eb92510e45f48d5ea61403a702f9 [2023-04-01 04:02:49,355 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:02:49,357 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:02:49,359 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:02:49,359 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:02:49,362 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:02:49,363 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:02:49" (1/1) ... [2023-04-01 04:02:49,364 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@539fae87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:02:49, skipping insertion in model container [2023-04-01 04:02:49,364 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:02:49" (1/1) ... [2023-04-01 04:02:49,370 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:02:49,470 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:02:49,717 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_label47.c[4902,4915] [2023-04-01 04:02:50,466 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:02:50,477 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:02:50,507 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_label47.c[4902,4915] [2023-04-01 04:02:50,886 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:02:50,908 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:02:50,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:02:50 WrapperNode [2023-04-01 04:02:50,908 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:02:50,910 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:02:50,910 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:02:50,910 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:02:50,921 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:02:50" (1/1) ... [2023-04-01 04:02:50,921 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:02:50" (1/1) ... [2023-04-01 04:02:50,973 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:02:50" (1/1) ... [2023-04-01 04:02:50,973 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:02:50" (1/1) ... [2023-04-01 04:02:51,071 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:02:50" (1/1) ... [2023-04-01 04:02:51,096 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:02:50" (1/1) ... [2023-04-01 04:02:51,129 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:02:50" (1/1) ... [2023-04-01 04:02:51,146 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:02:50" (1/1) ... [2023-04-01 04:02:51,173 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:02:51,174 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:02:51,174 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:02:51,175 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:02:51,176 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:02:50" (1/1) ... [2023-04-01 04:02:51,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:02:51,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:02:51,278 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 04:02:51,313 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 04:02:51,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:02:51,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:02:51,343 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:02:51,343 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:02:51,343 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:02:51,343 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 04:02:51,344 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 04:02:51,344 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:02:51,344 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:02:51,344 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:02:51,344 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 04:02:51,344 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 04:02:51,344 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:02:51,344 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:02:51,344 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:02:51,344 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:02:51,345 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:02:51,345 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:02:51,345 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:02:51,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:02:51,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:02:51,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:02:51,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:02:51,345 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:02:51,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:02:51,438 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:02:51,441 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:02:55,593 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:02:56,176 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:02:56,176 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:02:56,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:02:56 BoogieIcfgContainer [2023-04-01 04:02:56,182 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:02:56,185 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:02:56,185 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:02:56,188 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:02:56,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:02:49" (1/3) ... [2023-04-01 04:02:56,189 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25f6e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:02:56, skipping insertion in model container [2023-04-01 04:02:56,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:02:50" (2/3) ... [2023-04-01 04:02:56,189 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25f6e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:02:56, skipping insertion in model container [2023-04-01 04:02:56,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:02:56" (3/3) ... [2023-04-01 04:02:56,190 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label47.c [2023-04-01 04:02:56,205 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:02:56,205 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:02:56,276 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:02:56,283 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;@4574d624, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:02:56,283 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:02:56,292 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 04:02:56,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:02:56,298 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:02:56,298 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:02:56,299 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:02:56,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:02:56,304 INFO L85 PathProgramCache]: Analyzing trace with hash 636341761, now seen corresponding path program 1 times [2023-04-01 04:02:56,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:02:56,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449505455] [2023-04-01 04:02:56,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:02:56,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:02:56,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:02:56,639 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 04:02:56,639 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:02:56,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449505455] [2023-04-01 04:02:56,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449505455] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:02:56,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:02:56,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:02:56,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016172663] [2023-04-01 04:02:56,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:02:56,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:02:56,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:02:56,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:02:56,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:02:56,682 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 04:02:59,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:02:59,816 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-04-01 04:02:59,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:02:59,819 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 04:02:59,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:02:59,839 INFO L225 Difference]: With dead ends: 2068 [2023-04-01 04:02:59,839 INFO L226 Difference]: Without dead ends: 1371 [2023-04-01 04:02:59,846 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 04:02:59,849 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 846 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 1995 mSolverCounterSat, 884 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s 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, 3.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:02:59,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [846 Valid, 217 Invalid, 2879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [884 Valid, 1995 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-04-01 04:02:59,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-04-01 04:02:59,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1368. [2023-04-01 04:02:59,949 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 04:02:59,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 2530 transitions. [2023-04-01 04:02:59,956 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 2530 transitions. Word has length 11 [2023-04-01 04:02:59,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:02:59,957 INFO L495 AbstractCegarLoop]: Abstraction has 1368 states and 2530 transitions. [2023-04-01 04:02:59,957 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 04:02:59,957 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 2530 transitions. [2023-04-01 04:02:59,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 04:02:59,959 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:02:59,959 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 04:02:59,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:02:59,959 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:02:59,960 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:02:59,960 INFO L85 PathProgramCache]: Analyzing trace with hash 2062090164, now seen corresponding path program 1 times [2023-04-01 04:02:59,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:02:59,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135068851] [2023-04-01 04:02:59,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:02:59,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:02:59,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:03:00,161 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 04:03:00,161 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:03:00,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135068851] [2023-04-01 04:03:00,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135068851] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:03:00,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:03:00,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:03:00,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503721181] [2023-04-01 04:03:00,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:03:00,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:03:00,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:03:00,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:03:00,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:03:00,165 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 04:03:04,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:03:04,087 INFO L93 Difference]: Finished difference Result 4138 states and 7702 transitions. [2023-04-01 04:03:04,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:03:04,088 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 04:03:04,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:03:04,105 INFO L225 Difference]: With dead ends: 4138 [2023-04-01 04:03:04,106 INFO L226 Difference]: Without dead ends: 2775 [2023-04-01 04:03:04,116 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 04:03:04,119 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 2488 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 3906 mSolverCounterSat, 910 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s 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, 3.7s IncrementalHoareTripleChecker+Time [2023-04-01 04:03:04,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2488 Valid, 118 Invalid, 4816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [910 Valid, 3906 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-04-01 04:03:04,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2775 states. [2023-04-01 04:03:04,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2775 to 2757. [2023-04-01 04:03:04,231 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 04:03:04,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2757 states to 2757 states and 4701 transitions. [2023-04-01 04:03:04,244 INFO L78 Accepts]: Start accepts. Automaton has 2757 states and 4701 transitions. Word has length 25 [2023-04-01 04:03:04,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:03:04,244 INFO L495 AbstractCegarLoop]: Abstraction has 2757 states and 4701 transitions. [2023-04-01 04:03:04,244 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 04:03:04,244 INFO L276 IsEmpty]: Start isEmpty. Operand 2757 states and 4701 transitions. [2023-04-01 04:03:04,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-01 04:03:04,246 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:03:04,246 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 04:03:04,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:03:04,246 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:03:04,247 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:03:04,247 INFO L85 PathProgramCache]: Analyzing trace with hash 688611013, now seen corresponding path program 1 times [2023-04-01 04:03:04,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:03:04,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173724753] [2023-04-01 04:03:04,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:03:04,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:03:04,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:03:04,466 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 04:03:04,466 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:03:04,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173724753] [2023-04-01 04:03:04,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173724753] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:03:04,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:03:04,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:03:04,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136584087] [2023-04-01 04:03:04,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:03:04,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:03:04,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:03:04,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:03:04,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:03:04,470 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 04:03:08,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:03:08,670 INFO L93 Difference]: Finished difference Result 7729 states and 13220 transitions. [2023-04-01 04:03:08,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:03:08,671 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 04:03:08,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:03:08,703 INFO L225 Difference]: With dead ends: 7729 [2023-04-01 04:03:08,703 INFO L226 Difference]: Without dead ends: 4977 [2023-04-01 04:03:08,713 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 04:03:08,716 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 2452 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 3744 mSolverCounterSat, 1261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s 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, 4.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:03:08,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2452 Valid, 95 Invalid, 5005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1261 Valid, 3744 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2023-04-01 04:03:08,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4977 states. [2023-04-01 04:03:08,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4977 to 4896. [2023-04-01 04:03:08,863 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 04:03:08,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4896 states to 4896 states and 7924 transitions. [2023-04-01 04:03:08,882 INFO L78 Accepts]: Start accepts. Automaton has 4896 states and 7924 transitions. Word has length 30 [2023-04-01 04:03:08,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:03:08,883 INFO L495 AbstractCegarLoop]: Abstraction has 4896 states and 7924 transitions. [2023-04-01 04:03:08,883 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 04:03:08,883 INFO L276 IsEmpty]: Start isEmpty. Operand 4896 states and 7924 transitions. [2023-04-01 04:03:08,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 04:03:08,885 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:03:08,885 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 04:03:08,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:03:08,885 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:03:08,886 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:03:08,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1213224253, now seen corresponding path program 1 times [2023-04-01 04:03:08,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:03:08,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750712398] [2023-04-01 04:03:08,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:03:08,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:03:08,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:03:09,041 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 04:03:09,041 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:03:09,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750712398] [2023-04-01 04:03:09,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750712398] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:03:09,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958850819] [2023-04-01 04:03:09,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:03:09,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:03:09,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:03:09,049 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 04:03:09,068 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 04:03:09,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:03:09,155 INFO L262 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:03:09,160 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:03:09,263 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 04:03:09,263 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:03:09,373 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 04:03:09,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958850819] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:03:09,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [987248864] [2023-04-01 04:03:09,393 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-04-01 04:03:09,393 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:03:09,396 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:03:09,401 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:03:09,402 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:03:09,637 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 52 for LOIs [2023-04-01 04:03:09,810 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 32 [2023-04-01 04:03:11,069 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 52683 conjuctions. This might take some time... [2023-04-01 04:03:15,628 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 745 conjuctions. [2023-04-01 04:03:25,888 WARN L223 SmtUtils]: Spent 5.50s on a formula simplification that was a NOOP. DAG size: 606 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)