/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/Problem18_label32.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:27:05,813 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:27:05,814 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:27:05,845 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:27:05,846 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:27:05,848 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:27:05,850 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:27:05,853 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:27:05,854 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:27:05,858 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:27:05,859 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:27:05,861 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:27:05,861 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:27:05,863 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:27:05,864 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:27:05,865 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:27:05,865 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:27:05,866 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:27:05,867 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:27:05,871 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:27:05,872 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:27:05,872 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:27:05,873 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:27:05,874 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:27:05,880 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-31 22:27:05,882 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:27:05,882 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:27:05,883 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:27:05,884 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:27:05,884 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:27:05,885 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:27:05,885 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:27:05,885 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:27:05,885 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:27:05,886 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:27:05,886 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:27:05,888 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 22:27:05,911 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:27:05,912 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:27:05,912 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:27:05,912 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:27:05,913 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:27:05,913 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:27:05,913 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:27:05,913 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:27:05,913 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:27:05,913 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:27:05,914 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:27:05,914 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:27:05,914 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:27:05,914 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:27:05,914 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:27:05,914 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:27:05,915 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:27:05,915 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:27:05,915 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:27:05,915 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:27:05,915 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:27:05,915 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:27:05,915 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:27:05,916 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:27:05,916 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:27:05,916 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:27:05,916 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:27:05,916 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:27:05,916 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:27:05,916 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:27:05,916 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:27:05,917 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:27:05,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:27:05,917 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:27:05,917 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:27:05,917 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:27:05,917 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:27:05,917 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:27:05,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:27:05,917 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:27:05,917 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:27:05,917 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:27:06,113 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:27:06,141 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:27:06,143 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:27:06,143 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:27:06,145 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:27:06,146 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem18_label32.c [2023-03-31 22:27:07,197 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:27:07,511 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:27:07,511 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label32.c [2023-03-31 22:27:07,528 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d145dce52/d9854d31d2b54f0796d7c3dddce12f00/FLAG37235b903 [2023-03-31 22:27:07,545 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d145dce52/d9854d31d2b54f0796d7c3dddce12f00 [2023-03-31 22:27:07,546 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:27:07,548 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:27:07,550 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:27:07,550 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:27:07,552 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:27:07,553 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:27:07" (1/1) ... [2023-03-31 22:27:07,554 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d4d66a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:27:07, skipping insertion in model container [2023-03-31 22:27:07,554 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:27:07" (1/1) ... [2023-03-31 22:27:07,559 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:27:07,626 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:27:07,792 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/Problem18_label32.c[3190,3203] [2023-03-31 22:27:08,393 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:27:08,400 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:27:08,409 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/Problem18_label32.c[3190,3203] [2023-03-31 22:27:08,610 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:27:08,626 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:27:08,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:27:08 WrapperNode [2023-03-31 22:27:08,627 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:27:08,628 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:27:08,628 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:27:08,628 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:27:08,636 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:27:08" (1/1) ... [2023-03-31 22:27:08,636 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:27:08" (1/1) ... [2023-03-31 22:27:08,672 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:27:08" (1/1) ... [2023-03-31 22:27:08,672 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:27:08" (1/1) ... [2023-03-31 22:27:08,732 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:27:08" (1/1) ... [2023-03-31 22:27:08,747 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:27:08" (1/1) ... [2023-03-31 22:27:08,775 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:27:08" (1/1) ... [2023-03-31 22:27:08,781 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:27:08" (1/1) ... [2023-03-31 22:27:08,793 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:27:08,794 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:27:08,794 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:27:08,795 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:27:08,796 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:27:08" (1/1) ... [2023-03-31 22:27:08,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:27:08,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:27:08,830 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 22:27:08,846 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 22:27:08,863 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:27:08,863 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:27:08,863 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:27:08,863 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 22:27:08,863 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 22:27:08,863 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-31 22:27:08,863 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:27:08,864 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 22:27:08,864 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 22:27:08,864 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-31 22:27:08,864 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:27:08,864 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:27:08,864 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:27:08,864 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:27:08,864 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:27:08,864 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:27:08,864 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:27:08,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:27:08,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:27:08,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:27:08,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:27:08,865 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:27:08,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:27:08,914 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:27:08,916 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:27:11,136 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:27:17,101 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:27:17,102 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 22:27:17,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:27:17 BoogieIcfgContainer [2023-03-31 22:27:17,105 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:27:17,106 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:27:17,106 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:27:17,109 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:27:17,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:27:07" (1/3) ... [2023-03-31 22:27:17,109 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3acaee61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:27:17, skipping insertion in model container [2023-03-31 22:27:17,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:27:08" (2/3) ... [2023-03-31 22:27:17,109 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3acaee61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:27:17, skipping insertion in model container [2023-03-31 22:27:17,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:27:17" (3/3) ... [2023-03-31 22:27:17,110 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label32.c [2023-03-31 22:27:17,124 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:27:17,124 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:27:17,176 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:27:17,182 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;@4d40d9f7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:27:17,183 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:27:17,189 INFO L276 IsEmpty]: Start isEmpty. Operand has 469 states, 457 states have (on average 1.9715536105032823) internal successors, (901), 458 states have internal predecessors, (901), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 22:27:17,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 22:27:17,193 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:27:17,194 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:27:17,194 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:27:17,198 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:27:17,198 INFO L85 PathProgramCache]: Analyzing trace with hash 314228739, now seen corresponding path program 1 times [2023-03-31 22:27:17,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:27:17,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964807304] [2023-03-31 22:27:17,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:27:17,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:27:17,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:27:17,514 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 22:27:17,515 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:27:17,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964807304] [2023-03-31 22:27:17,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964807304] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:27:17,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:27:17,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:27:17,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649822373] [2023-03-31 22:27:17,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:27:17,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:27:17,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:27:17,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:27:17,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:27:17,559 INFO L87 Difference]: Start difference. First operand has 469 states, 457 states have (on average 1.9715536105032823) internal successors, (901), 458 states have internal predecessors, (901), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) 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) [2023-03-31 22:27:19,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:27:19,297 INFO L93 Difference]: Finished difference Result 1393 states and 2727 transitions. [2023-03-31 22:27:19,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:27:19,299 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 [2023-03-31 22:27:19,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:27:19,313 INFO L225 Difference]: With dead ends: 1393 [2023-03-31 22:27:19,313 INFO L226 Difference]: Without dead ends: 921 [2023-03-31 22:27:19,318 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 22:27:19,320 INFO L413 NwaCegarLoop]: 318 mSDtfsCounter, 515 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 1352 mSolverCounterSat, 455 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 455 IncrementalHoareTripleChecker+Valid, 1352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-03-31 22:27:19,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [515 Valid, 339 Invalid, 1807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [455 Valid, 1352 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-03-31 22:27:19,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2023-03-31 22:27:19,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 919. [2023-03-31 22:27:19,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 905 states have (on average 1.6519337016574585) internal successors, (1495), 905 states have internal predecessors, (1495), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-03-31 22:27:19,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1512 transitions. [2023-03-31 22:27:19,483 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1512 transitions. Word has length 11 [2023-03-31 22:27:19,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:27:19,483 INFO L495 AbstractCegarLoop]: Abstraction has 919 states and 1512 transitions. [2023-03-31 22:27:19,483 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) [2023-03-31 22:27:19,483 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1512 transitions. [2023-03-31 22:27:19,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-03-31 22:27:19,484 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:27:19,484 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:27:19,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:27:19,491 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:27:19,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:27:19,493 INFO L85 PathProgramCache]: Analyzing trace with hash -35972447, now seen corresponding path program 1 times [2023-03-31 22:27:19,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:27:19,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994143226] [2023-03-31 22:27:19,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:27:19,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:27:19,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:27:19,628 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 22:27:19,628 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:27:19,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994143226] [2023-03-31 22:27:19,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994143226] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:27:19,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:27:19,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:27:19,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426232577] [2023-03-31 22:27:19,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:27:19,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:27:19,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:27:19,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:27:19,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:27:19,635 INFO L87 Difference]: Start difference. First operand 919 states and 1512 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 22:27:21,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:27:21,941 INFO L93 Difference]: Finished difference Result 2781 states and 4622 transitions. [2023-03-31 22:27:21,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:27:21,942 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 21 [2023-03-31 22:27:21,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:27:21,951 INFO L225 Difference]: With dead ends: 2781 [2023-03-31 22:27:21,951 INFO L226 Difference]: Without dead ends: 1867 [2023-03-31 22:27:21,961 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 22:27:21,962 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 1548 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 3056 mSolverCounterSat, 701 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1548 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 3757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 701 IncrementalHoareTripleChecker+Valid, 3056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-03-31 22:27:21,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1548 Valid, 83 Invalid, 3757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [701 Valid, 3056 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-03-31 22:27:21,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1867 states. [2023-03-31 22:27:22,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1867 to 1822. [2023-03-31 22:27:22,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1822 states, 1792 states have (on average 1.5412946428571428) internal successors, (2762), 1796 states have internal predecessors, (2762), 11 states have call successors, (11), 11 states have call predecessors, (11), 18 states have return successors, (50), 14 states have call predecessors, (50), 10 states have call successors, (50) [2023-03-31 22:27:22,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 2823 transitions. [2023-03-31 22:27:22,024 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 2823 transitions. Word has length 21 [2023-03-31 22:27:22,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:27:22,024 INFO L495 AbstractCegarLoop]: Abstraction has 1822 states and 2823 transitions. [2023-03-31 22:27:22,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 22:27:22,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 2823 transitions. [2023-03-31 22:27:22,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-03-31 22:27:22,025 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:27:22,025 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] [2023-03-31 22:27:22,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 22:27:22,025 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:27:22,026 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:27:22,026 INFO L85 PathProgramCache]: Analyzing trace with hash -568173351, now seen corresponding path program 1 times [2023-03-31 22:27:22,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:27:22,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348396303] [2023-03-31 22:27:22,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:27:22,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:27:22,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:27:22,187 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 22:27:22,188 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:27:22,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348396303] [2023-03-31 22:27:22,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348396303] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:27:22,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:27:22,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:27:22,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484212106] [2023-03-31 22:27:22,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:27:22,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:27:22,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:27:22,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:27:22,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:27:22,192 INFO L87 Difference]: Start difference. First operand 1822 states and 2823 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) [2023-03-31 22:27:24,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:27:24,437 INFO L93 Difference]: Finished difference Result 5051 states and 8054 transitions. [2023-03-31 22:27:24,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:27:24,440 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 [2023-03-31 22:27:24,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:27:24,451 INFO L225 Difference]: With dead ends: 5051 [2023-03-31 22:27:24,451 INFO L226 Difference]: Without dead ends: 3234 [2023-03-31 22:27:24,457 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 22:27:24,458 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 1718 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 2397 mSolverCounterSat, 910 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1718 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 3307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 910 IncrementalHoareTripleChecker+Valid, 2397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-03-31 22:27:24,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1718 Valid, 66 Invalid, 3307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [910 Valid, 2397 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-03-31 22:27:24,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3234 states. [2023-03-31 22:27:24,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3234 to 3207. [2023-03-31 22:27:24,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3207 states, 3152 states have (on average 1.3981598984771573) internal successors, (4407), 3163 states have internal predecessors, (4407), 17 states have call successors, (17), 17 states have call predecessors, (17), 37 states have return successors, (145), 26 states have call predecessors, (145), 16 states have call successors, (145) [2023-03-31 22:27:24,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3207 states to 3207 states and 4569 transitions. [2023-03-31 22:27:24,541 INFO L78 Accepts]: Start accepts. Automaton has 3207 states and 4569 transitions. Word has length 25 [2023-03-31 22:27:24,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:27:24,541 INFO L495 AbstractCegarLoop]: Abstraction has 3207 states and 4569 transitions. [2023-03-31 22:27:24,541 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) [2023-03-31 22:27:24,542 INFO L276 IsEmpty]: Start isEmpty. Operand 3207 states and 4569 transitions. [2023-03-31 22:27:24,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-03-31 22:27:24,544 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:27:24,544 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] [2023-03-31 22:27:24,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 22:27:24,544 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:27:24,545 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:27:24,545 INFO L85 PathProgramCache]: Analyzing trace with hash -33145634, now seen corresponding path program 1 times [2023-03-31 22:27:24,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:27:24,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417211580] [2023-03-31 22:27:24,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:27:24,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:27:24,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:27:24,664 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 22:27:24,665 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:27:24,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417211580] [2023-03-31 22:27:24,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417211580] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:27:24,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:27:24,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:27:24,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589752272] [2023-03-31 22:27:24,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:27:24,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:27:24,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:27:24,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:27:24,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:27:24,668 INFO L87 Difference]: Start difference. First operand 3207 states and 4569 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 22:27:26,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:27:26,220 INFO L93 Difference]: Finished difference Result 6434 states and 9164 transitions. [2023-03-31 22:27:26,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:27:26,220 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 58 [2023-03-31 22:27:26,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:27:26,231 INFO L225 Difference]: With dead ends: 6434 [2023-03-31 22:27:26,231 INFO L226 Difference]: Without dead ends: 3232 [2023-03-31 22:27:26,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:27:26,239 INFO L413 NwaCegarLoop]: 764 mSDtfsCounter, 503 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1377 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 1575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 1377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-03-31 22:27:26,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [503 Valid, 786 Invalid, 1575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 1377 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-03-31 22:27:26,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3232 states. [2023-03-31 22:27:26,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3232 to 3207. [2023-03-31 22:27:26,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3207 states, 3152 states have (on average 1.3651649746192893) internal successors, (4303), 3163 states have internal predecessors, (4303), 17 states have call successors, (17), 17 states have call predecessors, (17), 37 states have return successors, (132), 26 states have call predecessors, (132), 16 states have call successors, (132) [2023-03-31 22:27:26,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3207 states to 3207 states and 4452 transitions. [2023-03-31 22:27:26,328 INFO L78 Accepts]: Start accepts. Automaton has 3207 states and 4452 transitions. Word has length 58 [2023-03-31 22:27:26,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:27:26,329 INFO L495 AbstractCegarLoop]: Abstraction has 3207 states and 4452 transitions. [2023-03-31 22:27:26,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 22:27:26,329 INFO L276 IsEmpty]: Start isEmpty. Operand 3207 states and 4452 transitions. [2023-03-31 22:27:26,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-03-31 22:27:26,330 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:27:26,330 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2023-03-31 22:27:26,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 22:27:26,330 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:27:26,331 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:27:26,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1381989956, now seen corresponding path program 1 times [2023-03-31 22:27:26,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:27:26,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962677732] [2023-03-31 22:27:26,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:27:26,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:27:26,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:27:26,496 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-03-31 22:27:26,497 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:27:26,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962677732] [2023-03-31 22:27:26,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962677732] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:27:26,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:27:26,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:27:26,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26408834] [2023-03-31 22:27:26,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:27:26,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:27:26,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:27:26,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:27:26,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:27:26,498 INFO L87 Difference]: Start difference. First operand 3207 states and 4452 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 22:27:28,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:27:28,268 INFO L93 Difference]: Finished difference Result 9127 states and 12555 transitions. [2023-03-31 22:27:28,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:27:28,275 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 68 [2023-03-31 22:27:28,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:27:28,291 INFO L225 Difference]: With dead ends: 9127 [2023-03-31 22:27:28,291 INFO L226 Difference]: Without dead ends: 5925 [2023-03-31 22:27:28,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:27:28,304 INFO L413 NwaCegarLoop]: 883 mSDtfsCounter, 451 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1317 mSolverCounterSat, 531 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 905 SdHoareTripleChecker+Invalid, 1848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 531 IncrementalHoareTripleChecker+Valid, 1317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-03-31 22:27:28,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [451 Valid, 905 Invalid, 1848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [531 Valid, 1317 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-03-31 22:27:28,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5925 states. [2023-03-31 22:27:28,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5925 to 5866. [2023-03-31 22:27:28,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5866 states, 5778 states have (on average 1.248355832467982) internal successors, (7213), 5797 states have internal predecessors, (7213), 29 states have call successors, (29), 29 states have call predecessors, (29), 58 states have return successors, (303), 39 states have call predecessors, (303), 28 states have call successors, (303) [2023-03-31 22:27:28,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5866 states to 5866 states and 7545 transitions. [2023-03-31 22:27:28,396 INFO L78 Accepts]: Start accepts. Automaton has 5866 states and 7545 transitions. Word has length 68 [2023-03-31 22:27:28,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:27:28,397 INFO L495 AbstractCegarLoop]: Abstraction has 5866 states and 7545 transitions. [2023-03-31 22:27:28,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 22:27:28,397 INFO L276 IsEmpty]: Start isEmpty. Operand 5866 states and 7545 transitions. [2023-03-31 22:27:28,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-03-31 22:27:28,403 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:27:28,403 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:27:28,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-03-31 22:27:28,403 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:27:28,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:27:28,403 INFO L85 PathProgramCache]: Analyzing trace with hash -497338569, now seen corresponding path program 1 times [2023-03-31 22:27:28,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:27:28,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091555404] [2023-03-31 22:27:28,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:27:28,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:27:28,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:27:28,536 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:27:28,536 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:27:28,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091555404] [2023-03-31 22:27:28,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091555404] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:27:28,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746904830] [2023-03-31 22:27:28,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:27:28,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:27:28,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:27:28,540 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 22:27:28,541 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 22:27:28,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:27:28,643 INFO L262 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 22:27:28,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:27:28,759 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:27:28,759 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:27:28,991 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:27:28,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746904830] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:27:28,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [40634282] [2023-03-31 22:27:29,007 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2023-03-31 22:27:29,007 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:27:29,012 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:27:29,016 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:27:29,016 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:27:29,125 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 44 for LOIs [2023-03-31 22:27:29,214 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 22 [2023-03-31 22:27:29,314 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 39 [2023-03-31 22:27:29,923 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 45 for LOIs [2023-03-31 22:27:29,983 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 22 [2023-03-31 22:27:30,600 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 39 [2023-03-31 22:27:31,635 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 66234 conjuctions. This might take some time... [2023-03-31 22:27:38,710 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 1197 conjuctions.