/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 EqDomain -i ../sv-benchmarks/c/eca-rers2012/Problem19_label51.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 10:36:44,591 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 10:36:44,593 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 10:36:44,623 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 10:36:44,623 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 10:36:44,625 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 10:36:44,628 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 10:36:44,630 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 10:36:44,633 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 10:36:44,637 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 10:36:44,638 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 10:36:44,639 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 10:36:44,639 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 10:36:44,642 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 10:36:44,642 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 10:36:44,643 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 10:36:44,644 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 10:36:44,644 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 10:36:44,647 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 10:36:44,651 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 10:36:44,652 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 10:36:44,653 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 10:36:44,654 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 10:36:44,655 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 10:36:44,662 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 10:36:44,664 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 10:36:44,665 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 10:36:44,666 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 10:36:44,666 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 10:36:44,667 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 10:36:44,667 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 10:36:44,667 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 10:36:44,667 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 10:36:44,667 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 10:36:44,668 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 10:36:44,669 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 10:36:44,670 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 10:36:44,693 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 10:36:44,694 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 10:36:44,694 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 10:36:44,694 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 10:36:44,695 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 10:36:44,695 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 10:36:44,695 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 10:36:44,695 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 10:36:44,695 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 10:36:44,696 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 10:36:44,696 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 10:36:44,696 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 10:36:44,696 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 10:36:44,697 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 10:36:44,697 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 10:36:44,697 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 10:36:44,697 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 10:36:44,697 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 10:36:44,698 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 10:36:44,698 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 10:36:44,698 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 10:36:44,698 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 10:36:44,698 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 10:36:44,698 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 10:36:44,698 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 10:36:44,699 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 10:36:44,699 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 10:36:44,699 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 10:36:44,699 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 10:36:44,699 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 10:36:44,699 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 10:36:44,699 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 10:36:44,700 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:36:44,700 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 10:36:44,700 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 10:36:44,700 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 10:36:44,700 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 10:36:44,700 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 10:36:44,700 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 10:36:44,700 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 10:36:44,700 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 10:36:44,700 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 10:36:44,914 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 10:36:44,938 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 10:36:44,940 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 10:36:44,941 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 10:36:44,941 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 10:36:44,942 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label51.c [2023-04-01 10:36:45,998 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 10:36:46,447 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 10:36:46,448 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label51.c [2023-04-01 10:36:46,491 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/889abc7e9/71a6d7b4f34d46988d210bb2a139cb81/FLAG34d0fab68 [2023-04-01 10:36:46,503 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/889abc7e9/71a6d7b4f34d46988d210bb2a139cb81 [2023-04-01 10:36:46,505 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 10:36:46,507 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 10:36:46,509 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 10:36:46,509 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 10:36:46,512 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 10:36:46,512 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:36:46" (1/1) ... [2023-04-01 10:36:46,514 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e2d489e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:36:46, skipping insertion in model container [2023-04-01 10:36:46,514 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:36:46" (1/1) ... [2023-04-01 10:36:46,519 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 10:36:46,703 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 10:36:46,906 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label51.c[2619,2632] [2023-04-01 10:36:47,887 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:36:47,895 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 10:36:47,918 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label51.c[2619,2632] [2023-04-01 10:36:48,507 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:36:48,534 INFO L208 MainTranslator]: Completed translation [2023-04-01 10:36:48,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:36:48 WrapperNode [2023-04-01 10:36:48,535 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 10:36:48,536 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 10:36:48,536 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 10:36:48,536 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 10:36:48,544 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:36:48" (1/1) ... [2023-04-01 10:36:48,544 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:36:48" (1/1) ... [2023-04-01 10:36:48,608 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:36:48" (1/1) ... [2023-04-01 10:36:48,609 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:36:48" (1/1) ... [2023-04-01 10:36:48,783 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:36:48" (1/1) ... [2023-04-01 10:36:48,810 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:36:48" (1/1) ... [2023-04-01 10:36:48,836 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:36:48" (1/1) ... [2023-04-01 10:36:48,850 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:36:48" (1/1) ... [2023-04-01 10:36:48,947 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 10:36:48,948 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 10:36:48,948 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 10:36:48,949 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 10:36:48,950 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:36:48" (1/1) ... [2023-04-01 10:36:48,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:36:48,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:36:48,972 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 10:36:48,984 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 10:36:49,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 10:36:49,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 10:36:49,009 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 10:36:49,009 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 10:36:49,009 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 10:36:49,009 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 10:36:49,010 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 10:36:49,010 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-04-01 10:36:49,010 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-04-01 10:36:49,010 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 10:36:49,010 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 10:36:49,010 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 10:36:49,010 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 10:36:49,010 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 10:36:49,010 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-04-01 10:36:49,010 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-04-01 10:36:49,010 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 10:36:49,010 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 10:36:49,010 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 10:36:49,010 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 10:36:49,010 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 10:36:49,010 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 10:36:49,010 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 10:36:49,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 10:36:49,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 10:36:49,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 10:36:49,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 10:36:49,011 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 10:36:49,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 10:36:49,111 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 10:36:49,112 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 10:36:54,814 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 10:37:07,947 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 10:37:07,947 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 10:37:07,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:37:07 BoogieIcfgContainer [2023-04-01 10:37:07,951 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 10:37:07,953 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 10:37:07,953 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 10:37:07,955 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 10:37:07,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:36:46" (1/3) ... [2023-04-01 10:37:07,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3abcba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:37:07, skipping insertion in model container [2023-04-01 10:37:07,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:36:48" (2/3) ... [2023-04-01 10:37:07,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3abcba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:37:07, skipping insertion in model container [2023-04-01 10:37:07,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:37:07" (3/3) ... [2023-04-01 10:37:07,957 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label51.c [2023-04-01 10:37:07,971 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 10:37:07,971 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 10:37:08,033 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 10:37:08,038 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;@1c36a321, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 10:37:08,038 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 10:37:08,046 INFO L276 IsEmpty]: Start isEmpty. Operand has 1144 states, 1126 states have (on average 1.980461811722913) internal successors, (2230), 1127 states have internal predecessors, (2230), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 10:37:08,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 10:37:08,052 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:37:08,053 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:37:08,053 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:37:08,056 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:37:08,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1432408260, now seen corresponding path program 1 times [2023-04-01 10:37:08,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:37:08,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97323702] [2023-04-01 10:37:08,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:37:08,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:37:08,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:37:08,344 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 10:37:08,344 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:37:08,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97323702] [2023-04-01 10:37:08,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97323702] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:37:08,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:37:08,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:37:08,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412671895] [2023-04-01 10:37:08,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:37:08,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:37:08,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:37:08,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:37:08,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:37:08,381 INFO L87 Difference]: Start difference. First operand has 1144 states, 1126 states have (on average 1.980461811722913) internal successors, (2230), 1127 states have internal predecessors, (2230), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:37:14,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:37:14,213 INFO L93 Difference]: Finished difference Result 3418 states and 6741 transitions. [2023-04-01 10:37:14,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:37:14,217 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 10:37:14,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:37:14,244 INFO L225 Difference]: With dead ends: 3418 [2023-04-01 10:37:14,244 INFO L226 Difference]: Without dead ends: 2271 [2023-04-01 10:37:14,253 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 10:37:14,256 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 1199 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 3346 mSolverCounterSat, 1927 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1199 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 5273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1927 IncrementalHoareTripleChecker+Valid, 3346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2023-04-01 10:37:14,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1199 Valid, 147 Invalid, 5273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1927 Valid, 3346 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2023-04-01 10:37:14,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2023-04-01 10:37:14,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 2245. [2023-04-01 10:37:14,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2245 states, 2219 states have (on average 1.943668319062641) internal successors, (4313), 2219 states have internal predecessors, (4313), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (22), 12 states have call predecessors, (22), 12 states have call successors, (22) [2023-04-01 10:37:14,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 4348 transitions. [2023-04-01 10:37:14,379 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 4348 transitions. Word has length 11 [2023-04-01 10:37:14,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:37:14,379 INFO L495 AbstractCegarLoop]: Abstraction has 2245 states and 4348 transitions. [2023-04-01 10:37:14,379 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 10:37:14,379 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 4348 transitions. [2023-04-01 10:37:14,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-01 10:37:14,383 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:37:14,383 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:37:14,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 10:37:14,383 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:37:14,383 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:37:14,384 INFO L85 PathProgramCache]: Analyzing trace with hash 591229489, now seen corresponding path program 1 times [2023-04-01 10:37:14,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:37:14,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378679580] [2023-04-01 10:37:14,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:37:14,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:37:14,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:37:14,675 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 10:37:14,675 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:37:14,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378679580] [2023-04-01 10:37:14,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378679580] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:37:14,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:37:14,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:37:14,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459365418] [2023-04-01 10:37:14,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:37:14,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:37:14,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:37:14,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:37:14,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:37:14,681 INFO L87 Difference]: Start difference. First operand 2245 states and 4348 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 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 10:37:22,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:37:22,130 INFO L93 Difference]: Finished difference Result 6815 states and 13229 transitions. [2023-04-01 10:37:22,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 10:37:22,131 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 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 51 [2023-04-01 10:37:22,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:37:22,149 INFO L225 Difference]: With dead ends: 6815 [2023-04-01 10:37:22,149 INFO L226 Difference]: Without dead ends: 4575 [2023-04-01 10:37:22,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-01 10:37:22,155 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 3896 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 7008 mSolverCounterSat, 1354 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3896 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 8362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1354 IncrementalHoareTripleChecker+Valid, 7008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2023-04-01 10:37:22,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3896 Valid, 135 Invalid, 8362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1354 Valid, 7008 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2023-04-01 10:37:22,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4575 states. [2023-04-01 10:37:22,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4575 to 4526. [2023-04-01 10:37:22,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4526 states, 4460 states have (on average 1.6091928251121077) internal successors, (7177), 4464 states have internal predecessors, (7177), 23 states have call successors, (23), 23 states have call predecessors, (23), 42 states have return successors, (120), 38 states have call predecessors, (120), 22 states have call successors, (120) [2023-04-01 10:37:22,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4526 states to 4526 states and 7320 transitions. [2023-04-01 10:37:22,272 INFO L78 Accepts]: Start accepts. Automaton has 4526 states and 7320 transitions. Word has length 51 [2023-04-01 10:37:22,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:37:22,273 INFO L495 AbstractCegarLoop]: Abstraction has 4526 states and 7320 transitions. [2023-04-01 10:37:22,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 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 10:37:22,273 INFO L276 IsEmpty]: Start isEmpty. Operand 4526 states and 7320 transitions. [2023-04-01 10:37:22,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-04-01 10:37:22,277 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:37:22,277 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:37:22,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 10:37:22,277 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:37:22,278 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:37:22,278 INFO L85 PathProgramCache]: Analyzing trace with hash 484162141, now seen corresponding path program 1 times [2023-04-01 10:37:22,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:37:22,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348726865] [2023-04-01 10:37:22,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:37:22,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:37:22,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:37:22,564 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 10:37:22,565 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:37:22,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348726865] [2023-04-01 10:37:22,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348726865] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:37:22,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:37:22,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:37:22,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008720122] [2023-04-01 10:37:22,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:37:22,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:37:22,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:37:22,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:37:22,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:37:22,568 INFO L87 Difference]: Start difference. First operand 4526 states and 7320 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 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 10:37:29,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:37:29,145 INFO L93 Difference]: Finished difference Result 13831 states and 22530 transitions. [2023-04-01 10:37:29,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 10:37:29,169 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 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 61 [2023-04-01 10:37:29,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:37:29,219 INFO L225 Difference]: With dead ends: 13831 [2023-04-01 10:37:29,219 INFO L226 Difference]: Without dead ends: 9310 [2023-04-01 10:37:29,232 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 10:37:29,234 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 5941 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 6470 mSolverCounterSat, 704 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5941 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 7174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 704 IncrementalHoareTripleChecker+Valid, 6470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2023-04-01 10:37:29,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5941 Valid, 142 Invalid, 7174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [704 Valid, 6470 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2023-04-01 10:37:29,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9310 states. [2023-04-01 10:37:29,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9310 to 9008. [2023-04-01 10:37:29,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9008 states, 8825 states have (on average 1.5190934844192634) internal successors, (13406), 8845 states have internal predecessors, (13406), 43 states have call successors, (43), 43 states have call predecessors, (43), 139 states have return successors, (440), 119 states have call predecessors, (440), 42 states have call successors, (440) [2023-04-01 10:37:29,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9008 states to 9008 states and 13889 transitions. [2023-04-01 10:37:29,454 INFO L78 Accepts]: Start accepts. Automaton has 9008 states and 13889 transitions. Word has length 61 [2023-04-01 10:37:29,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:37:29,454 INFO L495 AbstractCegarLoop]: Abstraction has 9008 states and 13889 transitions. [2023-04-01 10:37:29,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 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 10:37:29,454 INFO L276 IsEmpty]: Start isEmpty. Operand 9008 states and 13889 transitions. [2023-04-01 10:37:29,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-04-01 10:37:29,459 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:37:29,459 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, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:37:29,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 10:37:29,460 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:37:29,462 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:37:29,462 INFO L85 PathProgramCache]: Analyzing trace with hash 396293746, now seen corresponding path program 1 times [2023-04-01 10:37:29,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:37:29,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11906634] [2023-04-01 10:37:29,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:37:29,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:37:29,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:37:29,674 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 10:37:29,675 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:37:29,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11906634] [2023-04-01 10:37:29,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11906634] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:37:29,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85463704] [2023-04-01 10:37:29,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:37:29,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:37:29,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:37:29,678 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 10:37:29,684 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 10:37:29,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:37:29,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 10:37:29,785 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:37:29,851 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 10:37:29,851 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 10:37:29,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85463704] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:37:29,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 10:37:29,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-04-01 10:37:29,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817502672] [2023-04-01 10:37:29,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:37:29,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:37:29,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:37:29,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:37:29,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 10:37:29,853 INFO L87 Difference]: Start difference. First operand 9008 states and 13889 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 10:37:37,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:37:37,694 INFO L93 Difference]: Finished difference Result 28012 states and 43937 transitions. [2023-04-01 10:37:37,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 10:37:37,695 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 81 [2023-04-01 10:37:37,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:37:37,767 INFO L225 Difference]: With dead ends: 28012 [2023-04-01 10:37:37,767 INFO L226 Difference]: Without dead ends: 19009 [2023-04-01 10:37:37,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-04-01 10:37:37,798 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 3689 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 6913 mSolverCounterSat, 2289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3689 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 9202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2289 IncrementalHoareTripleChecker+Valid, 6913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2023-04-01 10:37:37,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3689 Valid, 156 Invalid, 9202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2289 Valid, 6913 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2023-04-01 10:37:37,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19009 states. [2023-04-01 10:37:38,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19009 to 18477. [2023-04-01 10:37:38,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18477 states, 17941 states have (on average 1.3359901900674434) internal successors, (23969), 18030 states have internal predecessors, (23969), 82 states have call successors, (82), 82 states have call predecessors, (82), 453 states have return successors, (1741), 364 states have call predecessors, (1741), 81 states have call successors, (1741) [2023-04-01 10:37:38,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18477 states to 18477 states and 25792 transitions. [2023-04-01 10:37:38,209 INFO L78 Accepts]: Start accepts. Automaton has 18477 states and 25792 transitions. Word has length 81 [2023-04-01 10:37:38,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:37:38,210 INFO L495 AbstractCegarLoop]: Abstraction has 18477 states and 25792 transitions. [2023-04-01 10:37:38,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 10:37:38,210 INFO L276 IsEmpty]: Start isEmpty. Operand 18477 states and 25792 transitions. [2023-04-01 10:37:38,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-04-01 10:37:38,212 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:37:38,212 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:37:38,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 10:37:38,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:37:38,417 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:37:38,418 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:37:38,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1704915598, now seen corresponding path program 1 times [2023-04-01 10:37:38,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:37:38,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901349191] [2023-04-01 10:37:38,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:37:38,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:37:38,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:37:38,617 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 10:37:38,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:37:38,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901349191] [2023-04-01 10:37:38,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901349191] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:37:38,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:37:38,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:37:38,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594525770] [2023-04-01 10:37:38,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:37:38,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:37:38,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:37:38,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:37:38,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:37:38,623 INFO L87 Difference]: Start difference. First operand 18477 states and 25792 transitions. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 4 states have internal predecessors, (110), 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)