/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_label06.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 10:33:13,514 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 10:33:13,517 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 10:33:13,560 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 10:33:13,561 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 10:33:13,564 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 10:33:13,567 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 10:33:13,569 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 10:33:13,571 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 10:33:13,577 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 10:33:13,578 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 10:33:13,580 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 10:33:13,581 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 10:33:13,583 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 10:33:13,584 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 10:33:13,584 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 10:33:13,585 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 10:33:13,585 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 10:33:13,587 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 10:33:13,588 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 10:33:13,589 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 10:33:13,591 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 10:33:13,592 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 10:33:13,597 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 10:33:13,605 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 10:33:13,605 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 10:33:13,605 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 10:33:13,607 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 10:33:13,607 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 10:33:13,608 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 10:33:13,608 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 10:33:13,609 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 10:33:13,610 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 10:33:13,611 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 10:33:13,612 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 10:33:13,612 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 10:33:13,612 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 10:33:13,612 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 10:33:13,613 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 10:33:13,613 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 10:33:13,614 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 10:33:13,615 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 10:33:13,644 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 10:33:13,644 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 10:33:13,645 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 10:33:13,645 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 10:33:13,646 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 10:33:13,646 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 10:33:13,646 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 10:33:13,646 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 10:33:13,646 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 10:33:13,647 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 10:33:13,647 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 10:33:13,647 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 10:33:13,648 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 10:33:13,648 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 10:33:13,648 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 10:33:13,648 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 10:33:13,648 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 10:33:13,648 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 10:33:13,649 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 10:33:13,649 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 10:33:13,649 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 10:33:13,649 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 10:33:13,649 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 10:33:13,650 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 10:33:13,650 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 10:33:13,650 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 10:33:13,650 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 10:33:13,650 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 10:33:13,650 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 10:33:13,651 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 10:33:13,651 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 10:33:13,651 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 10:33:13,651 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:33:13,651 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 10:33:13,651 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 10:33:13,652 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 10:33:13,652 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 10:33:13,652 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 10:33:13,652 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 10:33:13,652 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 10:33:13,652 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 10:33:13,652 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 10:33:13,888 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 10:33:13,917 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 10:33:13,922 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 10:33:13,923 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 10:33:13,924 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 10:33:13,925 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label06.c [2023-04-01 10:33:15,085 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 10:33:15,579 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 10:33:15,579 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label06.c [2023-04-01 10:33:15,627 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07feced73/f5959e5ec5ce480db71a0d9b1cd104be/FLAG24a904da5 [2023-04-01 10:33:15,643 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07feced73/f5959e5ec5ce480db71a0d9b1cd104be [2023-04-01 10:33:15,647 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 10:33:15,648 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 10:33:15,650 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 10:33:15,650 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 10:33:15,653 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 10:33:15,654 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:33:15" (1/1) ... [2023-04-01 10:33:15,655 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c881de9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:33:15, skipping insertion in model container [2023-04-01 10:33:15,655 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:33:15" (1/1) ... [2023-04-01 10:33:15,662 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 10:33:15,844 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 10:33:16,114 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_label06.c[7097,7110] [2023-04-01 10:33:17,286 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:33:17,357 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 10:33:17,383 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_label06.c[7097,7110] [2023-04-01 10:33:18,070 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:33:18,106 INFO L208 MainTranslator]: Completed translation [2023-04-01 10:33:18,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:33:18 WrapperNode [2023-04-01 10:33:18,107 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 10:33:18,108 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 10:33:18,109 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 10:33:18,109 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 10:33:18,119 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:33:18" (1/1) ... [2023-04-01 10:33:18,120 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:33:18" (1/1) ... [2023-04-01 10:33:18,228 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:33:18" (1/1) ... [2023-04-01 10:33:18,229 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:33:18" (1/1) ... [2023-04-01 10:33:18,386 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:33:18" (1/1) ... [2023-04-01 10:33:18,421 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:33:18" (1/1) ... [2023-04-01 10:33:18,523 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:33:18" (1/1) ... [2023-04-01 10:33:18,545 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:33:18" (1/1) ... [2023-04-01 10:33:18,600 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 10:33:18,601 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 10:33:18,602 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 10:33:18,602 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 10:33:18,603 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:33:18" (1/1) ... [2023-04-01 10:33:18,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:33:18,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:33:18,633 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 10:33:18,637 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 10:33:18,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 10:33:18,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 10:33:18,666 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 10:33:18,666 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 10:33:18,666 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 10:33:18,666 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 10:33:18,666 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 10:33:18,666 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-04-01 10:33:18,666 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-04-01 10:33:18,666 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 10:33:18,666 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 10:33:18,667 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 10:33:18,667 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 10:33:18,667 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 10:33:18,667 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-04-01 10:33:18,667 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-04-01 10:33:18,667 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 10:33:18,667 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 10:33:18,667 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 10:33:18,667 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 10:33:18,667 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 10:33:18,667 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 10:33:18,668 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 10:33:18,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 10:33:18,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 10:33:18,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 10:33:18,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 10:33:18,668 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 10:33:18,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 10:33:18,737 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 10:33:18,739 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 10:33:26,266 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 10:33:40,939 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 10:33:40,939 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 10:33:40,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:33:40 BoogieIcfgContainer [2023-04-01 10:33:40,944 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 10:33:40,947 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 10:33:40,947 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 10:33:40,951 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 10:33:40,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:33:15" (1/3) ... [2023-04-01 10:33:40,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2608edc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:33:40, skipping insertion in model container [2023-04-01 10:33:40,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:33:18" (2/3) ... [2023-04-01 10:33:40,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2608edc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:33:40, skipping insertion in model container [2023-04-01 10:33:40,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:33:40" (3/3) ... [2023-04-01 10:33:40,953 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label06.c [2023-04-01 10:33:40,972 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 10:33:40,972 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 10:33:41,050 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 10:33:41,057 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;@7a63bed4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 10:33:41,058 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 10:33:41,069 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 10:33:41,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 10:33:41,076 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:33:41,077 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:33:41,078 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:33:41,082 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:33:41,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1432417732, now seen corresponding path program 1 times [2023-04-01 10:33:41,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:33:41,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184307196] [2023-04-01 10:33:41,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:33:41,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:33:41,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:33:41,512 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 10:33:41,512 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:33:41,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184307196] [2023-04-01 10:33:41,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184307196] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:33:41,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:33:41,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:33:41,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228652564] [2023-04-01 10:33:41,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:33:41,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:33:41,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:33:41,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:33:41,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:33:41,556 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 10:33:47,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:33:47,169 INFO L93 Difference]: Finished difference Result 3418 states and 6741 transitions. [2023-04-01 10:33:47,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:33:47,173 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 10:33:47,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:33:47,205 INFO L225 Difference]: With dead ends: 3418 [2023-04-01 10:33:47,205 INFO L226 Difference]: Without dead ends: 2271 [2023-04-01 10:33:47,214 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 10:33:47,217 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 1191 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 3809 mSolverCounterSat, 914 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1191 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 4723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 914 IncrementalHoareTripleChecker+Valid, 3809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2023-04-01 10:33:47,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1191 Valid, 259 Invalid, 4723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [914 Valid, 3809 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2023-04-01 10:33:47,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2023-04-01 10:33:47,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 2269. [2023-04-01 10:33:47,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2269 states, 2243 states have (on average 1.8872046366473474) internal successors, (4233), 2243 states have internal predecessors, (4233), 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 10:33:47,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2269 states to 2269 states and 4268 transitions. [2023-04-01 10:33:47,377 INFO L78 Accepts]: Start accepts. Automaton has 2269 states and 4268 transitions. Word has length 11 [2023-04-01 10:33:47,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:33:47,378 INFO L495 AbstractCegarLoop]: Abstraction has 2269 states and 4268 transitions. [2023-04-01 10:33:47,379 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 10:33:47,379 INFO L276 IsEmpty]: Start isEmpty. Operand 2269 states and 4268 transitions. [2023-04-01 10:33:47,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 10:33:47,381 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:33:47,381 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:33:47,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 10:33:47,382 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:33:47,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:33:47,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1561900264, now seen corresponding path program 1 times [2023-04-01 10:33:47,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:33:47,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744226760] [2023-04-01 10:33:47,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:33:47,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:33:47,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:33:47,638 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 10:33:47,638 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:33:47,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744226760] [2023-04-01 10:33:47,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744226760] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:33:47,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:33:47,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:33:47,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706385904] [2023-04-01 10:33:47,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:33:47,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:33:47,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:33:47,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:33:47,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:33:47,641 INFO L87 Difference]: Start difference. First operand 2269 states and 4268 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:33:55,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:33:55,249 INFO L93 Difference]: Finished difference Result 6869 states and 12971 transitions. [2023-04-01 10:33:55,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 10:33:55,254 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2023-04-01 10:33:55,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:33:55,277 INFO L225 Difference]: With dead ends: 6869 [2023-04-01 10:33:55,277 INFO L226 Difference]: Without dead ends: 4605 [2023-04-01 10:33:55,287 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 10:33:55,290 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 3856 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 6432 mSolverCounterSat, 2061 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3856 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 8493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2061 IncrementalHoareTripleChecker+Valid, 6432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2023-04-01 10:33:55,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3856 Valid, 148 Invalid, 8493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2061 Valid, 6432 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2023-04-01 10:33:55,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4605 states. [2023-04-01 10:33:55,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4605 to 4572. [2023-04-01 10:33:55,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4572 states, 4507 states have (on average 1.8011981362325271) internal successors, (8118), 4511 states have internal predecessors, (8118), 23 states have call successors, (23), 23 states have call predecessors, (23), 41 states have return successors, (120), 37 states have call predecessors, (120), 22 states have call successors, (120) [2023-04-01 10:33:55,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4572 states to 4572 states and 8261 transitions. [2023-04-01 10:33:55,426 INFO L78 Accepts]: Start accepts. Automaton has 4572 states and 8261 transitions. Word has length 25 [2023-04-01 10:33:55,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:33:55,427 INFO L495 AbstractCegarLoop]: Abstraction has 4572 states and 8261 transitions. [2023-04-01 10:33:55,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:33:55,427 INFO L276 IsEmpty]: Start isEmpty. Operand 4572 states and 8261 transitions. [2023-04-01 10:33:55,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 10:33:55,428 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:33:55,428 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] [2023-04-01 10:33:55,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 10:33:55,429 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:33:55,429 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:33:55,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1255549168, now seen corresponding path program 1 times [2023-04-01 10:33:55,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:33:55,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340588112] [2023-04-01 10:33:55,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:33:55,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:33:55,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:33:55,667 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 10:33:55,667 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:33:55,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340588112] [2023-04-01 10:33:55,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340588112] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:33:55,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:33:55,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:33:55,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20767919] [2023-04-01 10:33:55,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:33:55,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:33:55,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:33:55,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:33:55,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:33:55,672 INFO L87 Difference]: Start difference. First operand 4572 states and 8261 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 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 10:34:03,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:34:03,502 INFO L93 Difference]: Finished difference Result 13013 states and 23486 transitions. [2023-04-01 10:34:03,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 10:34:03,503 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 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 29 [2023-04-01 10:34:03,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:34:03,540 INFO L225 Difference]: With dead ends: 13013 [2023-04-01 10:34:03,540 INFO L226 Difference]: Without dead ends: 8446 [2023-04-01 10:34:03,550 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 10:34:03,551 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 3801 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 6861 mSolverCounterSat, 1739 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3801 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 8600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1739 IncrementalHoareTripleChecker+Valid, 6861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2023-04-01 10:34:03,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3801 Valid, 184 Invalid, 8600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1739 Valid, 6861 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2023-04-01 10:34:03,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8446 states. [2023-04-01 10:34:03,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8446 to 8256. [2023-04-01 10:34:03,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8256 states, 8050 states have (on average 1.5526708074534161) internal successors, (12499), 8078 states have internal predecessors, (12499), 38 states have call successors, (38), 38 states have call predecessors, (38), 167 states have return successors, (593), 139 states have call predecessors, (593), 37 states have call successors, (593) [2023-04-01 10:34:03,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8256 states to 8256 states and 13130 transitions. [2023-04-01 10:34:03,807 INFO L78 Accepts]: Start accepts. Automaton has 8256 states and 13130 transitions. Word has length 29 [2023-04-01 10:34:03,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:34:03,807 INFO L495 AbstractCegarLoop]: Abstraction has 8256 states and 13130 transitions. [2023-04-01 10:34:03,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 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 10:34:03,808 INFO L276 IsEmpty]: Start isEmpty. Operand 8256 states and 13130 transitions. [2023-04-01 10:34:03,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-01 10:34:03,810 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:34:03,810 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:34:03,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 10:34:03,810 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:34:03,811 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:34:03,811 INFO L85 PathProgramCache]: Analyzing trace with hash -2130533624, now seen corresponding path program 1 times [2023-04-01 10:34:03,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:34:03,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392861615] [2023-04-01 10:34:03,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:34:03,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:34:03,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:34:03,973 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 10:34:03,973 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:34:03,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392861615] [2023-04-01 10:34:03,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392861615] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:34:03,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:34:03,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:34:03,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053562494] [2023-04-01 10:34:03,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:34:03,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:34:03,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:34:03,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:34:03,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:34:03,976 INFO L87 Difference]: Start difference. First operand 8256 states and 13130 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)