/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/eca-rers2012/Problem17_label10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:21:32,662 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:21:32,664 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:21:32,707 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:21:32,708 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:21:32,711 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:21:32,714 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:21:32,717 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:21:32,718 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:21:32,723 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:21:32,724 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:21:32,726 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:21:32,726 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:21:32,729 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:21:32,730 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:21:32,732 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:21:32,733 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:21:32,733 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:21:32,735 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:21:32,741 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:21:32,742 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:21:32,743 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:21:32,744 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:21:32,745 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:21:32,749 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 04:21:32,752 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:21:32,753 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:21:32,754 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:21:32,755 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:21:32,755 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:21:32,756 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:21:32,756 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:21:32,756 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:21:32,756 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:21:32,757 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:21:32,758 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:21:32,759 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 04:21:32,790 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:21:32,791 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:21:32,791 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:21:32,791 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:21:32,792 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:21:32,792 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:21:32,792 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:21:32,793 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:21:32,793 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:21:32,793 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:21:32,793 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:21:32,794 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:21:32,794 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:21:32,794 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:21:32,794 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:21:32,794 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:21:32,794 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:21:32,794 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:21:32,795 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:21:32,795 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:21:32,795 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:21:32,795 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:21:32,796 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:21:32,796 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:21:32,796 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:21:32,796 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:21:32,796 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:21:32,796 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:21:32,796 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:21:32,797 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:21:32,797 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:21:32,797 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:21:32,797 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:21:32,797 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:21:32,797 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:21:32,797 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:21:32,798 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:21:32,798 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:21:32,798 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:21:32,798 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:21:32,798 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:21:32,798 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:21:33,039 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:21:33,063 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:21:33,065 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:21:33,066 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:21:33,067 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:21:33,068 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label10.c [2023-04-01 04:21:34,306 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:21:34,680 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:21:34,680 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label10.c [2023-04-01 04:21:34,704 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b39eefd15/b0bd3e78897f44249cf371d4afa8dfdf/FLAGfdb9922b0 [2023-04-01 04:21:34,723 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b39eefd15/b0bd3e78897f44249cf371d4afa8dfdf [2023-04-01 04:21:34,726 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:21:34,727 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:21:34,730 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:21:34,730 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:21:34,733 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:21:34,733 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:21:34" (1/1) ... [2023-04-01 04:21:34,734 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b97f755 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:21:34, skipping insertion in model container [2023-04-01 04:21:34,735 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:21:34" (1/1) ... [2023-04-01 04:21:34,741 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:21:34,826 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:21:35,028 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/Problem17_label10.c[5916,5929] [2023-04-01 04:21:35,538 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:21:35,549 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:21:35,586 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/Problem17_label10.c[5916,5929] [2023-04-01 04:21:35,834 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:21:35,851 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:21:35,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:21:35 WrapperNode [2023-04-01 04:21:35,851 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:21:35,852 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:21:35,853 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:21:35,853 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:21:35,863 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:21:35" (1/1) ... [2023-04-01 04:21:35,863 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:21:35" (1/1) ... [2023-04-01 04:21:35,934 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:21:35" (1/1) ... [2023-04-01 04:21:35,934 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:21:35" (1/1) ... [2023-04-01 04:21:36,021 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:21:35" (1/1) ... [2023-04-01 04:21:36,045 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:21:35" (1/1) ... [2023-04-01 04:21:36,084 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:21:35" (1/1) ... [2023-04-01 04:21:36,095 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:21:35" (1/1) ... [2023-04-01 04:21:36,128 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:21:36,129 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:21:36,129 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:21:36,130 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:21:36,131 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:21:35" (1/1) ... [2023-04-01 04:21:36,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:21:36,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:21:36,183 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 04:21:36,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 04:21:36,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:21:36,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:21:36,224 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:21:36,224 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:21:36,224 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:21:36,224 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:21:36,225 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:21:36,225 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:21:36,225 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:21:36,225 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:21:36,225 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:21:36,225 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:21:36,225 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:21:36,225 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:21:36,225 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:21:36,225 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:21:36,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:21:36,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:21:36,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:21:36,226 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:21:36,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:21:36,312 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:21:36,314 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:21:39,634 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:21:49,376 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:21:49,377 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:21:49,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:21:49 BoogieIcfgContainer [2023-04-01 04:21:49,379 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:21:49,381 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:21:49,382 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:21:49,384 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:21:49,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:21:34" (1/3) ... [2023-04-01 04:21:49,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54dcb0dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:21:49, skipping insertion in model container [2023-04-01 04:21:49,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:21:35" (2/3) ... [2023-04-01 04:21:49,386 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54dcb0dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:21:49, skipping insertion in model container [2023-04-01 04:21:49,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:21:49" (3/3) ... [2023-04-01 04:21:49,388 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label10.c [2023-04-01 04:21:49,405 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:21:49,406 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:21:49,455 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:21:49,461 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;@78c00539, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:21:49,461 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:21:49,466 INFO L276 IsEmpty]: Start isEmpty. Operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 04:21:49,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:21:49,473 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:21:49,474 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:21:49,474 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:21:49,479 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:21:49,479 INFO L85 PathProgramCache]: Analyzing trace with hash -2084310295, now seen corresponding path program 1 times [2023-04-01 04:21:49,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:21:49,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246537745] [2023-04-01 04:21:49,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:21:49,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:21:49,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:21:49,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:21:49,904 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:21:49,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246537745] [2023-04-01 04:21:49,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246537745] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:21:49,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:21:49,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:21:49,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888077405] [2023-04-01 04:21:49,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:21:49,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:21:49,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:21:49,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:21:49,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:21:49,957 INFO L87 Difference]: Start difference. First operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:21:53,648 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-01 04:21:53,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:21:53,926 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2023-04-01 04:21:53,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:21:53,942 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 04:21:53,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:21:53,957 INFO L225 Difference]: With dead ends: 718 [2023-04-01 04:21:53,957 INFO L226 Difference]: Without dead ends: 471 [2023-04-01 04:21:53,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:21:53,969 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 245 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 216 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-04-01 04:21:53,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 85 Invalid, 974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 757 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2023-04-01 04:21:53,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-04-01 04:21:54,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 466. [2023-04-01 04:21:54,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 456 states have (on average 1.8421052631578947) internal successors, (840), 456 states have internal predecessors, (840), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 04:21:54,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 851 transitions. [2023-04-01 04:21:54,033 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 851 transitions. Word has length 11 [2023-04-01 04:21:54,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:21:54,033 INFO L495 AbstractCegarLoop]: Abstraction has 466 states and 851 transitions. [2023-04-01 04:21:54,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:21:54,034 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 851 transitions. [2023-04-01 04:21:54,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 04:21:54,035 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:21:54,035 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:21:54,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:21:54,036 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:21:54,036 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:21:54,036 INFO L85 PathProgramCache]: Analyzing trace with hash -2065754255, now seen corresponding path program 1 times [2023-04-01 04:21:54,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:21:54,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915699711] [2023-04-01 04:21:54,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:21:54,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:21:54,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:21:54,209 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:21:54,209 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:21:54,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915699711] [2023-04-01 04:21:54,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915699711] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:21:54,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:21:54,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:21:54,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617017499] [2023-04-01 04:21:54,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:21:54,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:21:54,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:21:54,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:21:54,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:21:54,213 INFO L87 Difference]: Start difference. First operand 466 states and 851 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) [2023-04-01 04:21:56,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:21:56,498 INFO L93 Difference]: Finished difference Result 1404 states and 2591 transitions. [2023-04-01 04:21:56,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 04:21:56,500 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 [2023-04-01 04:21:56,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:21:56,506 INFO L225 Difference]: With dead ends: 1404 [2023-04-01 04:21:56,506 INFO L226 Difference]: Without dead ends: 943 [2023-04-01 04:21:56,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-01 04:21:56,519 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 733 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1374 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 733 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 1374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-04-01 04:21:56,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [733 Valid, 49 Invalid, 1595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 1374 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-04-01 04:21:56,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2023-04-01 04:21:56,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 914. [2023-04-01 04:21:56,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 914 states, 896 states have (on average 1.5524553571428572) internal successors, (1391), 900 states have internal predecessors, (1391), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2023-04-01 04:21:56,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 1422 transitions. [2023-04-01 04:21:56,576 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 1422 transitions. Word has length 21 [2023-04-01 04:21:56,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:21:56,576 INFO L495 AbstractCegarLoop]: Abstraction has 914 states and 1422 transitions. [2023-04-01 04:21:56,577 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) [2023-04-01 04:21:56,577 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 1422 transitions. [2023-04-01 04:21:56,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-01 04:21:56,578 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:21:56,578 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] [2023-04-01 04:21:56,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:21:56,578 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:21:56,579 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:21:56,579 INFO L85 PathProgramCache]: Analyzing trace with hash 405280157, now seen corresponding path program 1 times [2023-04-01 04:21:56,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:21:56,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822859721] [2023-04-01 04:21:56,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:21:56,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:21:56,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:21:56,764 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:21:56,764 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:21:56,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822859721] [2023-04-01 04:21:56,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822859721] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:21:56,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:21:56,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:21:56,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575019836] [2023-04-01 04:21:56,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:21:56,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:21:56,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:21:56,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:21:56,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:21:56,766 INFO L87 Difference]: Start difference. First operand 914 states and 1422 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:21:59,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:21:59,011 INFO L93 Difference]: Finished difference Result 2783 states and 4387 transitions. [2023-04-01 04:21:59,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:21:59,011 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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 31 [2023-04-01 04:21:59,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:21:59,020 INFO L225 Difference]: With dead ends: 2783 [2023-04-01 04:21:59,020 INFO L226 Difference]: Without dead ends: 1874 [2023-04-01 04:21:59,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:21:59,023 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 716 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 1303 mSolverCounterSat, 447 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 716 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 447 IncrementalHoareTripleChecker+Valid, 1303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:21:59,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [716 Valid, 55 Invalid, 1750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [447 Valid, 1303 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-04-01 04:21:59,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1874 states. [2023-04-01 04:21:59,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1874 to 1201. [2023-04-01 04:21:59,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1201 states, 1163 states have (on average 1.4299226139294927) internal successors, (1663), 1181 states have internal predecessors, (1663), 10 states have call successors, (10), 10 states have call predecessors, (10), 27 states have return successors, (70), 9 states have call predecessors, (70), 9 states have call successors, (70) [2023-04-01 04:21:59,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 1743 transitions. [2023-04-01 04:21:59,070 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 1743 transitions. Word has length 31 [2023-04-01 04:21:59,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:21:59,071 INFO L495 AbstractCegarLoop]: Abstraction has 1201 states and 1743 transitions. [2023-04-01 04:21:59,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:21:59,071 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 1743 transitions. [2023-04-01 04:21:59,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-04-01 04:21:59,073 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:21:59,073 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] [2023-04-01 04:21:59,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:21:59,073 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:21:59,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:21:59,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1036222101, now seen corresponding path program 1 times [2023-04-01 04:21:59,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:21:59,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095632338] [2023-04-01 04:21:59,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:21:59,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:21:59,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:21:59,217 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:21:59,217 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:21:59,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095632338] [2023-04-01 04:21:59,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095632338] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:21:59,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17301497] [2023-04-01 04:21:59,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:21:59,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:21:59,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:21:59,225 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:21:59,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 04:21:59,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:21:59,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:21:59,337 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:21:59,402 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:21:59,402 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:21:59,500 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:21:59,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17301497] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:21:59,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [190561990] [2023-04-01 04:21:59,520 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2023-04-01 04:21:59,520 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:21:59,523 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:21:59,528 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:21:59,529 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:21:59,726 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 50 for LOIs [2023-04-01 04:22:00,123 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 33 [2023-04-01 04:22:01,353 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 32485 conjuctions. This might take some time... [2023-04-01 04:22:02,537 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 551 conjuctions. [2023-04-01 04:22:08,979 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 28