/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/Problem15_label04.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 19:55:55,382 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 19:55:55,384 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 19:55:55,415 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 19:55:55,416 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 19:55:55,418 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 19:55:55,421 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 19:55:55,423 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 19:55:55,424 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 19:55:55,427 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 19:55:55,429 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 19:55:55,430 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 19:55:55,430 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 19:55:55,432 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 19:55:55,433 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 19:55:55,434 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 19:55:55,435 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 19:55:55,435 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 19:55:55,436 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 19:55:55,440 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 19:55:55,441 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 19:55:55,442 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 19:55:55,442 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 19:55:55,443 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 19:55:55,449 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 19:55:55,449 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 19:55:55,449 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 19:55:55,450 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 19:55:55,450 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 19:55:55,451 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 19:55:55,451 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 19:55:55,451 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 19:55:55,452 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 19:55:55,453 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 19:55:55,453 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 19:55:55,454 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 19:55:55,454 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 19:55:55,454 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 19:55:55,454 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 19:55:55,454 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 19:55:55,455 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 19:55:55,456 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 [2023-04-02 19:55:55,477 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 19:55:55,477 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 19:55:55,477 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 19:55:55,477 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 19:55:55,478 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 19:55:55,478 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 19:55:55,478 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 19:55:55,478 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 19:55:55,478 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 19:55:55,478 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 19:55:55,479 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 19:55:55,479 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 19:55:55,479 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 19:55:55,479 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 19:55:55,479 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 19:55:55,479 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 19:55:55,480 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 19:55:55,480 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 19:55:55,480 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 19:55:55,480 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 19:55:55,480 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 19:55:55,480 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 19:55:55,480 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 19:55:55,480 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 19:55:55,480 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 19:55:55,481 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 19:55:55,481 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 19:55:55,481 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 19:55:55,481 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 19:55:55,481 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 19:55:55,481 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 19:55:55,481 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 19:55:55,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 19:55:55,482 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 19:55:55,482 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 19:55:55,482 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 19:55:55,482 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 19:55:55,482 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 19:55:55,482 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 19:55:55,482 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 19:55:55,482 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 19:55:55,482 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 19:55:55,681 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 19:55:55,707 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 19:55:55,709 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 19:55:55,710 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 19:55:55,713 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 19:55:55,714 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label04.c [2023-04-02 19:55:56,839 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 19:55:57,107 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 19:55:57,107 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label04.c [2023-04-02 19:55:57,121 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c756b7299/c1128d7dd9ad40b981552ae2443377b4/FLAGf9d1220c8 [2023-04-02 19:55:57,135 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c756b7299/c1128d7dd9ad40b981552ae2443377b4 [2023-04-02 19:55:57,136 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 19:55:57,137 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 19:55:57,139 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 19:55:57,140 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 19:55:57,142 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 19:55:57,142 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 07:55:57" (1/1) ... [2023-04-02 19:55:57,143 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e1ae915 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:55:57, skipping insertion in model container [2023-04-02 19:55:57,143 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 07:55:57" (1/1) ... [2023-04-02 19:55:57,147 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 19:55:57,194 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 19:55:57,305 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/Problem15_label04.c[3915,3928] [2023-04-02 19:55:57,664 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 19:55:57,673 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 19:55:57,699 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/Problem15_label04.c[3915,3928] [2023-04-02 19:55:57,824 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 19:55:57,836 INFO L208 MainTranslator]: Completed translation [2023-04-02 19:55:57,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:55:57 WrapperNode [2023-04-02 19:55:57,837 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 19:55:57,838 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 19:55:57,838 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 19:55:57,838 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 19:55:57,845 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:55:57" (1/1) ... [2023-04-02 19:55:57,846 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:55:57" (1/1) ... [2023-04-02 19:55:57,876 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:55:57" (1/1) ... [2023-04-02 19:55:57,876 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:55:57" (1/1) ... [2023-04-02 19:55:57,939 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:55:57" (1/1) ... [2023-04-02 19:55:57,954 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:55:57" (1/1) ... [2023-04-02 19:55:57,974 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:55:57" (1/1) ... [2023-04-02 19:55:57,981 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:55:57" (1/1) ... [2023-04-02 19:55:57,994 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 19:55:57,994 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 19:55:57,995 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 19:55:57,995 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 19:55:57,996 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:55:57" (1/1) ... [2023-04-02 19:55:58,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 19:55:58,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 19:55:58,034 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) [2023-04-02 19:55:58,067 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 [2023-04-02 19:55:58,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 19:55:58,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 19:55:58,101 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 19:55:58,104 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-02 19:55:58,104 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-02 19:55:58,104 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 19:55:58,105 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-02 19:55:58,105 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-02 19:55:58,105 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 19:55:58,105 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 19:55:58,105 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 19:55:58,105 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 19:55:58,106 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 19:55:58,106 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 19:55:58,106 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 19:55:58,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 19:55:58,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 19:55:58,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 19:55:58,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 19:55:58,107 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 19:55:58,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 19:55:58,173 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 19:55:58,175 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 19:55:59,754 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 19:56:00,240 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 19:56:00,240 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 19:56:00,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 07:56:00 BoogieIcfgContainer [2023-04-02 19:56:00,243 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 19:56:00,244 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 19:56:00,244 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 19:56:00,246 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 19:56:00,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 07:55:57" (1/3) ... [2023-04-02 19:56:00,246 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79204eba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 07:56:00, skipping insertion in model container [2023-04-02 19:56:00,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:55:57" (2/3) ... [2023-04-02 19:56:00,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79204eba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 07:56:00, skipping insertion in model container [2023-04-02 19:56:00,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 07:56:00" (3/3) ... [2023-04-02 19:56:00,247 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label04.c [2023-04-02 19:56:00,259 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 19:56:00,260 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 19:56:00,292 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 19:56:00,296 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;@31de89cf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 19:56:00,296 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 19:56:00,299 INFO L276 IsEmpty]: Start isEmpty. Operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 19:56:00,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-02 19:56:00,304 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:56:00,304 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 19:56:00,304 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:56:00,307 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:56:00,307 INFO L85 PathProgramCache]: Analyzing trace with hash 271516099, now seen corresponding path program 1 times [2023-04-02 19:56:00,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:56:00,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372799336] [2023-04-02 19:56:00,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:56:00,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:56:00,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:56:00,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 19:56:00,508 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:56:00,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372799336] [2023-04-02 19:56:00,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372799336] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:56:00,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 19:56:00,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 19:56:00,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21879123] [2023-04-02 19:56:00,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:56:00,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 19:56:00,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:56:00,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 19:56:00,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 19:56:00,532 INFO L87 Difference]: Start difference. First operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) 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) [2023-04-02 19:56:01,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:56:01,742 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2023-04-02 19:56:01,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 19:56:01,745 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 [2023-04-02 19:56:01,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:56:01,760 INFO L225 Difference]: With dead ends: 718 [2023-04-02 19:56:01,760 INFO L226 Difference]: Without dead ends: 471 [2023-04-02 19:56:01,773 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 [2023-04-02 19:56:01,775 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 238 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-02 19:56:01,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 181 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-02 19:56:01,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-04-02 19:56:01,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 469. [2023-04-02 19:56:01,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 459 states have (on average 1.5969498910675382) internal successors, (733), 459 states have internal predecessors, (733), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-02 19:56:01,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 744 transitions. [2023-04-02 19:56:01,818 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 744 transitions. Word has length 11 [2023-04-02 19:56:01,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:56:01,818 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 744 transitions. [2023-04-02 19:56:01,818 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) [2023-04-02 19:56:01,818 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 744 transitions. [2023-04-02 19:56:01,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-02 19:56:01,819 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:56:01,819 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 19:56:01,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 19:56:01,820 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:56:01,820 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:56:01,820 INFO L85 PathProgramCache]: Analyzing trace with hash -812402627, now seen corresponding path program 1 times [2023-04-02 19:56:01,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:56:01,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335534999] [2023-04-02 19:56:01,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:56:01,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:56:01,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:56:01,971 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 19:56:01,972 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:56:01,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335534999] [2023-04-02 19:56:01,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335534999] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:56:01,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 19:56:01,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 19:56:01,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160537551] [2023-04-02 19:56:01,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:56:01,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 19:56:01,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:56:01,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 19:56:01,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 19:56:01,974 INFO L87 Difference]: Start difference. First operand 469 states and 744 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 19:56:03,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:56:03,150 INFO L93 Difference]: Finished difference Result 1395 states and 2229 transitions. [2023-04-02 19:56:03,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 19:56:03,151 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2023-04-02 19:56:03,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:56:03,154 INFO L225 Difference]: With dead ends: 1395 [2023-04-02 19:56:03,155 INFO L226 Difference]: Without dead ends: 931 [2023-04-02 19:56:03,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 19:56:03,156 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 243 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-02 19:56:03,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 169 Invalid, 927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-02 19:56:03,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2023-04-02 19:56:03,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 929. [2023-04-02 19:56:03,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 913 states have (on average 1.3723986856516976) internal successors, (1253), 913 states have internal predecessors, (1253), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2023-04-02 19:56:03,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 1276 transitions. [2023-04-02 19:56:03,182 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 1276 transitions. Word has length 21 [2023-04-02 19:56:03,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:56:03,182 INFO L495 AbstractCegarLoop]: Abstraction has 929 states and 1276 transitions. [2023-04-02 19:56:03,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 19:56:03,182 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 1276 transitions. [2023-04-02 19:56:03,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-04-02 19:56:03,184 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:56:03,184 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 19:56:03,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 19:56:03,184 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:56:03,196 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:56:03,196 INFO L85 PathProgramCache]: Analyzing trace with hash 443615386, now seen corresponding path program 1 times [2023-04-02 19:56:03,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:56:03,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199746489] [2023-04-02 19:56:03,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:56:03,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:56:03,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:56:03,450 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-04-02 19:56:03,450 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:56:03,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199746489] [2023-04-02 19:56:03,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199746489] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:56:03,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 19:56:03,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 19:56:03,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420563846] [2023-04-02 19:56:03,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:56:03,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 19:56:03,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:56:03,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 19:56:03,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 19:56:03,454 INFO L87 Difference]: Start difference. First operand 929 states and 1276 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 19:56:05,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:56:05,171 INFO L93 Difference]: Finished difference Result 2350 states and 3356 transitions. [2023-04-02 19:56:05,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 19:56:05,172 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2023-04-02 19:56:05,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:56:05,176 INFO L225 Difference]: With dead ends: 2350 [2023-04-02 19:56:05,177 INFO L226 Difference]: Without dead ends: 1426 [2023-04-02 19:56:05,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-02 19:56:05,179 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 788 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1194 mSolverCounterSat, 347 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 788 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 347 IncrementalHoareTripleChecker+Valid, 1194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-04-02 19:56:05,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [788 Valid, 44 Invalid, 1541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [347 Valid, 1194 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-04-02 19:56:05,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1426 states. [2023-04-02 19:56:05,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1426 to 1403. [2023-04-02 19:56:05,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1403 states, 1374 states have (on average 1.294759825327511) internal successors, (1779), 1379 states have internal predecessors, (1779), 12 states have call successors, (12), 12 states have call predecessors, (12), 16 states have return successors, (33), 11 states have call predecessors, (33), 11 states have call successors, (33) [2023-04-02 19:56:05,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1403 states to 1403 states and 1824 transitions. [2023-04-02 19:56:05,207 INFO L78 Accepts]: Start accepts. Automaton has 1403 states and 1824 transitions. Word has length 67 [2023-04-02 19:56:05,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:56:05,207 INFO L495 AbstractCegarLoop]: Abstraction has 1403 states and 1824 transitions. [2023-04-02 19:56:05,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 19:56:05,207 INFO L276 IsEmpty]: Start isEmpty. Operand 1403 states and 1824 transitions. [2023-04-02 19:56:05,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-04-02 19:56:05,212 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:56:05,212 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 19:56:05,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 19:56:05,212 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:56:05,213 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:56:05,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1340038034, now seen corresponding path program 1 times [2023-04-02 19:56:05,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:56:05,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258784022] [2023-04-02 19:56:05,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:56:05,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:56:05,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:56:05,401 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-02 19:56:05,401 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:56:05,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258784022] [2023-04-02 19:56:05,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258784022] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:56:05,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 19:56:05,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 19:56:05,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271855605] [2023-04-02 19:56:05,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:56:05,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 19:56:05,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:56:05,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 19:56:05,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 19:56:05,403 INFO L87 Difference]: Start difference. First operand 1403 states and 1824 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 19:56:06,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:56:06,560 INFO L93 Difference]: Finished difference Result 3496 states and 4706 transitions. [2023-04-02 19:56:06,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 19:56:06,560 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 173 [2023-04-02 19:56:06,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:56:06,566 INFO L225 Difference]: With dead ends: 3496 [2023-04-02 19:56:06,567 INFO L226 Difference]: Without dead ends: 2098 [2023-04-02 19:56:06,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 19:56:06,569 INFO L413 NwaCegarLoop]: 413 mSDtfsCounter, 228 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-02 19:56:06,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 429 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-02 19:56:06,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2098 states. [2023-04-02 19:56:06,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2098 to 1868. [2023-04-02 19:56:06,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1868 states, 1831 states have (on average 1.251228836701256) internal successors, (2291), 1840 states have internal predecessors, (2291), 14 states have call successors, (14), 14 states have call predecessors, (14), 22 states have return successors, (57), 13 states have call predecessors, (57), 13 states have call successors, (57) [2023-04-02 19:56:06,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1868 states to 1868 states and 2362 transitions. [2023-04-02 19:56:06,596 INFO L78 Accepts]: Start accepts. Automaton has 1868 states and 2362 transitions. Word has length 173 [2023-04-02 19:56:06,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:56:06,596 INFO L495 AbstractCegarLoop]: Abstraction has 1868 states and 2362 transitions. [2023-04-02 19:56:06,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 19:56:06,596 INFO L276 IsEmpty]: Start isEmpty. Operand 1868 states and 2362 transitions. [2023-04-02 19:56:06,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2023-04-02 19:56:06,598 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:56:06,598 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 19:56:06,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 19:56:06,599 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:56:06,599 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:56:06,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1890764074, now seen corresponding path program 1 times [2023-04-02 19:56:06,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:56:06,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617607598] [2023-04-02 19:56:06,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:56:06,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:56:06,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:56:06,808 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 19:56:06,808 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:56:06,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617607598] [2023-04-02 19:56:06,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617607598] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 19:56:06,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573602375] [2023-04-02 19:56:06,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:56:06,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 19:56:06,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 19:56:06,816 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) [2023-04-02 19:56:06,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 19:56:06,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:56:06,926 INFO L262 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 19:56:06,931 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 19:56:07,014 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 19:56:07,014 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 19:56:07,122 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 19:56:07,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573602375] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 19:56:07,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [147236348] [2023-04-02 19:56:07,160 INFO L159 IcfgInterpreter]: Started Sifa with 148 locations of interest [2023-04-02 19:56:07,160 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 19:56:07,162 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 19:56:07,165 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 19:56:07,165 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 19:56:07,384 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 51 for LOIs [2023-04-02 19:56:07,645 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 25 [2023-04-02 19:56:08,445 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 43491 conjuctions. This might take some time... [2023-04-02 19:56:12,198 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 789 conjuctions. [2023-04-02 19:56:20,191 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 36