/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 IntervalDomain -i ../sv-benchmarks/c/eca-rers2012/Problem03_label04.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 21:17:35,643 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 21:17:35,644 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 21:17:35,676 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 21:17:35,676 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 21:17:35,678 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 21:17:35,680 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 21:17:35,681 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 21:17:35,682 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 21:17:35,686 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 21:17:35,687 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 21:17:35,689 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 21:17:35,689 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 21:17:35,691 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 21:17:35,691 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 21:17:35,692 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 21:17:35,693 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 21:17:35,693 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 21:17:35,695 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 21:17:35,698 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 21:17:35,699 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 21:17:35,700 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 21:17:35,700 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 21:17:35,701 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 21:17:35,707 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 21:17:35,707 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 21:17:35,708 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 21:17:35,708 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 21:17:35,709 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 21:17:35,709 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 21:17:35,709 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 21:17:35,710 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 21:17:35,711 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 21:17:35,711 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 21:17:35,712 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 21:17:35,712 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 21:17:35,712 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 21:17:35,712 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 21:17:35,712 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 21:17:35,713 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 21:17:35,713 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 21:17:35,714 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 [2023-03-31 21:17:35,738 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 21:17:35,738 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 21:17:35,739 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 21:17:35,739 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 21:17:35,739 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 21:17:35,740 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 21:17:35,740 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 21:17:35,740 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 21:17:35,740 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 21:17:35,740 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 21:17:35,741 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 21:17:35,741 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 21:17:35,741 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 21:17:35,741 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 21:17:35,741 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 21:17:35,741 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 21:17:35,741 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 21:17:35,741 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 21:17:35,741 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 21:17:35,742 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 21:17:35,742 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 21:17:35,742 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 21:17:35,742 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 21:17:35,742 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 21:17:35,742 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 21:17:35,742 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 21:17:35,743 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 21:17:35,743 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 21:17:35,743 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 21:17:35,743 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 21:17:35,743 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 21:17:35,743 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 21:17:35,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:17:35,743 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 21:17:35,743 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 21:17:35,743 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 21:17:35,744 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 21:17:35,744 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 21:17:35,744 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 21:17:35,744 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 21:17:35,744 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 21:17:35,744 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 21:17:35,916 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 21:17:35,929 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 21:17:35,930 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 21:17:35,931 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 21:17:35,931 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 21:17:35,932 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label04.c [2023-03-31 21:17:36,928 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 21:17:37,211 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 21:17:37,211 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label04.c [2023-03-31 21:17:37,222 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15bece577/79196b7aa92546469fef660ab358c8c6/FLAG26d69ff6e [2023-03-31 21:17:37,533 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15bece577/79196b7aa92546469fef660ab358c8c6 [2023-03-31 21:17:37,536 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 21:17:37,537 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 21:17:37,539 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 21:17:37,539 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 21:17:37,541 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 21:17:37,542 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:17:37" (1/1) ... [2023-03-31 21:17:37,543 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@238fa0c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:17:37, skipping insertion in model container [2023-03-31 21:17:37,543 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:17:37" (1/1) ... [2023-03-31 21:17:37,547 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 21:17:37,595 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 21:17:37,943 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/Problem03_label04.c[60959,60972] [2023-03-31 21:17:37,968 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:17:37,977 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 21:17:38,107 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/Problem03_label04.c[60959,60972] [2023-03-31 21:17:38,113 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:17:38,126 INFO L208 MainTranslator]: Completed translation [2023-03-31 21:17:38,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:17:38 WrapperNode [2023-03-31 21:17:38,126 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 21:17:38,127 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 21:17:38,127 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 21:17:38,127 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 21:17:38,136 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:17:38" (1/1) ... [2023-03-31 21:17:38,136 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:17:38" (1/1) ... [2023-03-31 21:17:38,162 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:17:38" (1/1) ... [2023-03-31 21:17:38,163 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:17:38" (1/1) ... [2023-03-31 21:17:38,218 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:17:38" (1/1) ... [2023-03-31 21:17:38,234 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:17:38" (1/1) ... [2023-03-31 21:17:38,245 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:17:38" (1/1) ... [2023-03-31 21:17:38,252 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:17:38" (1/1) ... [2023-03-31 21:17:38,262 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 21:17:38,263 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 21:17:38,263 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 21:17:38,263 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 21:17:38,264 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:17:38" (1/1) ... [2023-03-31 21:17:38,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:17:38,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:17:38,331 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) [2023-03-31 21:17:38,380 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 [2023-03-31 21:17:38,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 21:17:38,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 21:17:38,401 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 21:17:38,401 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 21:17:38,401 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 21:17:38,401 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 21:17:38,401 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 21:17:38,401 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 21:17:38,401 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 21:17:38,401 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 21:17:38,401 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 21:17:38,402 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 21:17:38,402 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 21:17:38,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 21:17:38,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 21:17:38,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 21:17:38,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 21:17:38,403 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 21:17:38,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 21:17:38,492 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 21:17:38,493 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 21:17:39,527 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 21:17:39,779 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 21:17:39,779 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 21:17:39,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:17:39 BoogieIcfgContainer [2023-03-31 21:17:39,783 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 21:17:39,785 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 21:17:39,785 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 21:17:39,787 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 21:17:39,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 09:17:37" (1/3) ... [2023-03-31 21:17:39,787 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b5e3a6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:17:39, skipping insertion in model container [2023-03-31 21:17:39,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:17:38" (2/3) ... [2023-03-31 21:17:39,787 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b5e3a6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:17:39, skipping insertion in model container [2023-03-31 21:17:39,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:17:39" (3/3) ... [2023-03-31 21:17:39,792 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label04.c [2023-03-31 21:17:39,803 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 21:17:39,803 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 21:17:39,836 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 21:17:39,840 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;@1abe471c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 21:17:39,840 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 21:17:39,844 INFO L276 IsEmpty]: Start isEmpty. Operand has 158 states, 150 states have (on average 1.9466666666666668) internal successors, (292), 151 states have internal predecessors, (292), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 21:17:39,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-03-31 21:17:39,852 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:17:39,853 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:17:39,853 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:17:39,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:17:39,856 INFO L85 PathProgramCache]: Analyzing trace with hash 597543414, now seen corresponding path program 1 times [2023-03-31 21:17:39,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:17:39,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072548818] [2023-03-31 21:17:39,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:17:39,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:17:40,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:17:40,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:17:40,877 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:17:40,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072548818] [2023-03-31 21:17:40,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072548818] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:17:40,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:17:40,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 21:17:40,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594905339] [2023-03-31 21:17:40,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:17:40,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 21:17:40,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:17:40,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 21:17:40,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 21:17:40,912 INFO L87 Difference]: Start difference. First operand has 158 states, 150 states have (on average 1.9466666666666668) internal successors, (292), 151 states have internal predecessors, (292), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 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) [2023-03-31 21:17:41,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:17:41,486 INFO L93 Difference]: Finished difference Result 462 states and 886 transitions. [2023-03-31 21:17:41,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 21:17:41,488 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 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 149 [2023-03-31 21:17:41,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:17:41,502 INFO L225 Difference]: With dead ends: 462 [2023-03-31 21:17:41,503 INFO L226 Difference]: Without dead ends: 301 [2023-03-31 21:17:41,506 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 [2023-03-31 21:17:41,509 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 33 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-31 21:17:41,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 56 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-31 21:17:41,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2023-03-31 21:17:41,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2023-03-31 21:17:41,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 293 states have (on average 1.8532423208191127) internal successors, (543), 293 states have internal predecessors, (543), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-03-31 21:17:41,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 552 transitions. [2023-03-31 21:17:41,547 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 552 transitions. Word has length 149 [2023-03-31 21:17:41,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:17:41,548 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 552 transitions. [2023-03-31 21:17:41,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 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) [2023-03-31 21:17:41,548 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 552 transitions. [2023-03-31 21:17:41,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-03-31 21:17:41,551 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:17:41,551 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:17:41,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 21:17:41,551 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:17:41,552 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:17:41,552 INFO L85 PathProgramCache]: Analyzing trace with hash 449097712, now seen corresponding path program 1 times [2023-03-31 21:17:41,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:17:41,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440169174] [2023-03-31 21:17:41,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:17:41,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:17:41,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:17:42,027 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:17:42,027 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:17:42,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440169174] [2023-03-31 21:17:42,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440169174] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:17:42,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:17:42,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:17:42,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519148622] [2023-03-31 21:17:42,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:17:42,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:17:42,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:17:42,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:17:42,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:17:42,032 INFO L87 Difference]: Start difference. First operand 301 states and 552 transitions. Second operand has 5 states, 5 states have (on average 30.2) internal successors, (151), 4 states have internal predecessors, (151), 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) [2023-03-31 21:17:42,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:17:42,706 INFO L93 Difference]: Finished difference Result 919 states and 1702 transitions. [2023-03-31 21:17:42,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 21:17:42,706 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 4 states have internal predecessors, (151), 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 157 [2023-03-31 21:17:42,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:17:42,709 INFO L225 Difference]: With dead ends: 919 [2023-03-31 21:17:42,709 INFO L226 Difference]: Without dead ends: 623 [2023-03-31 21:17:42,710 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 [2023-03-31 21:17:42,711 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 533 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-03-31 21:17:42,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [533 Valid, 43 Invalid, 1022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 859 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-03-31 21:17:42,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2023-03-31 21:17:42,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 605. [2023-03-31 21:17:42,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 588 states have (on average 1.7006802721088434) internal successors, (1000), 593 states have internal predecessors, (1000), 6 states have call successors, (6), 6 states have call predecessors, (6), 10 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2023-03-31 21:17:42,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1028 transitions. [2023-03-31 21:17:42,734 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1028 transitions. Word has length 157 [2023-03-31 21:17:42,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:17:42,734 INFO L495 AbstractCegarLoop]: Abstraction has 605 states and 1028 transitions. [2023-03-31 21:17:42,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 4 states have internal predecessors, (151), 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) [2023-03-31 21:17:42,734 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1028 transitions. [2023-03-31 21:17:42,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-03-31 21:17:42,738 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:17:42,738 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:17:42,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 21:17:42,738 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:17:42,738 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:17:42,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1421404367, now seen corresponding path program 1 times [2023-03-31 21:17:42,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:17:42,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360067807] [2023-03-31 21:17:42,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:17:42,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:17:42,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:17:43,024 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 21:17:43,024 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:17:43,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360067807] [2023-03-31 21:17:43,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360067807] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:17:43,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730639564] [2023-03-31 21:17:43,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:17:43,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:17:43,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:17:43,027 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) [2023-03-31 21:17:43,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 21:17:43,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:17:43,243 INFO L262 TraceCheckSpWp]: Trace formula consists of 1063 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 21:17:43,251 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:17:43,335 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:17:43,336 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:17:43,406 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:17:43,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730639564] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:17:43,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [593282281] [2023-03-31 21:17:43,429 INFO L159 IcfgInterpreter]: Started Sifa with 153 locations of interest [2023-03-31 21:17:43,429 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:17:43,432 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:17:43,435 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:17:43,435 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:17:44,124 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 162 for LOIs [2023-03-31 21:17:46,851 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 153 for LOIs