/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/Problem16_label34.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:17:32,610 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:17:32,612 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:17:32,645 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:17:32,645 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:17:32,646 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:17:32,650 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:17:32,653 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:17:32,654 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:17:32,658 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:17:32,659 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:17:32,661 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:17:32,661 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:17:32,665 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:17:32,665 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:17:32,666 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:17:32,667 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:17:32,668 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:17:32,669 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:17:32,674 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:17:32,674 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:17:32,675 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:17:32,677 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:17:32,678 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:17:32,688 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-31 22:17:32,690 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:17:32,690 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:17:32,691 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:17:32,691 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:17:32,692 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:17:32,692 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:17:32,693 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:17:32,693 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:17:32,693 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:17:32,694 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:17:32,694 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:17:32,699 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 22:17:32,725 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:17:32,725 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:17:32,725 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:17:32,726 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:17:32,726 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:17:32,726 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:17:32,726 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:17:32,727 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:17:32,727 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:17:32,727 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:17:32,727 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:17:32,728 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:17:32,728 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:17:32,728 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:17:32,728 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:17:32,728 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:17:32,728 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:17:32,728 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:17:32,729 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:17:32,729 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:17:32,729 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:17:32,729 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:17:32,729 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:17:32,729 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:17:32,729 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:17:32,730 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:17:32,730 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:17:32,730 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:17:32,730 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:17:32,730 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:17:32,730 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:17:32,731 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:17:32,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:17:32,731 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:17:32,731 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:17:32,731 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:17:32,731 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:17:32,731 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:17:32,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:17:32,731 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:17:32,732 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:17:32,732 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:17:32,960 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:17:32,982 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:17:32,984 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:17:32,985 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:17:32,986 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:17:32,987 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem16_label34.c [2023-03-31 22:17:34,130 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:17:34,419 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:17:34,420 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label34.c [2023-03-31 22:17:34,432 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9c8cb1c5/0684a8ce8e5240129bce3b6e89d76199/FLAG5a0ec4474 [2023-03-31 22:17:34,703 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9c8cb1c5/0684a8ce8e5240129bce3b6e89d76199 [2023-03-31 22:17:34,706 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:17:34,707 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:17:34,708 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:17:34,708 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:17:34,713 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:17:34,714 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:17:34" (1/1) ... [2023-03-31 22:17:34,714 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31a11808 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:17:34, skipping insertion in model container [2023-03-31 22:17:34,715 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:17:34" (1/1) ... [2023-03-31 22:17:34,721 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:17:34,775 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:17:34,906 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label34.c[3712,3725] [2023-03-31 22:17:35,217 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:17:35,233 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:17:35,248 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/Problem16_label34.c[3712,3725] [2023-03-31 22:17:35,414 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:17:35,429 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:17:35,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:17:35 WrapperNode [2023-03-31 22:17:35,430 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:17:35,431 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:17:35,431 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:17:35,431 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:17:35,441 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:17:35" (1/1) ... [2023-03-31 22:17:35,441 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:17:35" (1/1) ... [2023-03-31 22:17:35,478 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:17:35" (1/1) ... [2023-03-31 22:17:35,479 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:17:35" (1/1) ... [2023-03-31 22:17:35,522 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:17:35" (1/1) ... [2023-03-31 22:17:35,530 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:17:35" (1/1) ... [2023-03-31 22:17:35,549 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:17:35" (1/1) ... [2023-03-31 22:17:35,554 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:17:35" (1/1) ... [2023-03-31 22:17:35,572 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:17:35,573 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:17:35,573 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:17:35,573 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:17:35,574 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:17:35" (1/1) ... [2023-03-31 22:17:35,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:17:35,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:17:35,606 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 22:17:35,617 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 22:17:35,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:17:35,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:17:35,645 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:17:35,647 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 22:17:35,647 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 22:17:35,647 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:17:35,647 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 22:17:35,647 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 22:17:35,647 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:17:35,647 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:17:35,647 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:17:35,647 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:17:35,647 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:17:35,648 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:17:35,648 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:17:35,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:17:35,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:17:35,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:17:35,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:17:35,649 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:17:35,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:17:35,728 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:17:35,730 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:17:37,484 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:17:38,688 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:17:38,690 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 22:17:38,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:17:38 BoogieIcfgContainer [2023-03-31 22:17:38,693 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:17:38,696 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:17:38,696 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:17:38,698 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:17:38,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:17:34" (1/3) ... [2023-03-31 22:17:38,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@157b14a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:17:38, skipping insertion in model container [2023-03-31 22:17:38,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:17:35" (2/3) ... [2023-03-31 22:17:38,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@157b14a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:17:38, skipping insertion in model container [2023-03-31 22:17:38,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:17:38" (3/3) ... [2023-03-31 22:17:38,700 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label34.c [2023-03-31 22:17:38,714 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:17:38,715 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:17:38,770 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:17:38,776 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;@3fe3d8ac, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:17:38,776 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:17:38,782 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) [2023-03-31 22:17:38,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 22:17:38,788 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:17:38,788 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:17:38,789 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:17:38,793 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:17:38,794 INFO L85 PathProgramCache]: Analyzing trace with hash -706736282, now seen corresponding path program 1 times [2023-03-31 22:17:38,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:17:38,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963594035] [2023-03-31 22:17:38,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:17:38,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:17:38,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:17:39,071 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 22:17:39,071 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:17:39,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963594035] [2023-03-31 22:17:39,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963594035] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:17:39,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:17:39,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:17:39,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627857007] [2023-03-31 22:17:39,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:17:39,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:17:39,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:17:39,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:17:39,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:17:39,115 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) [2023-03-31 22:17:40,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:17:40,307 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2023-03-31 22:17:40,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:17:40,309 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 22:17:40,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:17:40,321 INFO L225 Difference]: With dead ends: 718 [2023-03-31 22:17:40,321 INFO L226 Difference]: Without dead ends: 471 [2023-03-31 22:17:40,327 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 22:17:40,329 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 300 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 348 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 348 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-03-31 22:17:40,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 74 Invalid, 996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [348 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-03-31 22:17:40,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-03-31 22:17:40,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 467. [2023-03-31 22:17:40,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 457 states have (on average 1.87308533916849) internal successors, (856), 457 states have internal predecessors, (856), 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) [2023-03-31 22:17:40,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 867 transitions. [2023-03-31 22:17:40,403 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 867 transitions. Word has length 11 [2023-03-31 22:17:40,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:17:40,404 INFO L495 AbstractCegarLoop]: Abstraction has 467 states and 867 transitions. [2023-03-31 22:17:40,404 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 22:17:40,405 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 867 transitions. [2023-03-31 22:17:40,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-03-31 22:17:40,407 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:17:40,407 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:17:40,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:17:40,408 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:17:40,408 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:17:40,408 INFO L85 PathProgramCache]: Analyzing trace with hash 766427195, now seen corresponding path program 1 times [2023-03-31 22:17:40,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:17:40,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637987099] [2023-03-31 22:17:40,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:17:40,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:17:40,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:17:40,836 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 22:17:40,836 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:17:40,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637987099] [2023-03-31 22:17:40,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637987099] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:17:40,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:17:40,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:17:40,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207833671] [2023-03-31 22:17:40,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:17:40,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:17:40,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:17:40,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:17:40,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:17:40,840 INFO L87 Difference]: Start difference. First operand 467 states and 867 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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 22:17:42,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:17:42,393 INFO L93 Difference]: Finished difference Result 1405 states and 2628 transitions. [2023-03-31 22:17:42,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:17:42,393 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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 59 [2023-03-31 22:17:42,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:17:42,400 INFO L225 Difference]: With dead ends: 1405 [2023-03-31 22:17:42,400 INFO L226 Difference]: Without dead ends: 943 [2023-03-31 22:17:42,402 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 22:17:42,403 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 922 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 922 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 439 IncrementalHoareTripleChecker+Valid, 1145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-03-31 22:17:42,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [922 Valid, 45 Invalid, 1584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [439 Valid, 1145 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-03-31 22:17:42,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2023-03-31 22:17:42,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 714. [2023-03-31 22:17:42,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 714 states, 695 states have (on average 1.720863309352518) internal successors, (1196), 698 states have internal predecessors, (1196), 8 states have call successors, (8), 8 states have call predecessors, (8), 10 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2023-03-31 22:17:42,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 1225 transitions. [2023-03-31 22:17:42,431 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 1225 transitions. Word has length 59 [2023-03-31 22:17:42,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:17:42,432 INFO L495 AbstractCegarLoop]: Abstraction has 714 states and 1225 transitions. [2023-03-31 22:17:42,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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 22:17:42,432 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 1225 transitions. [2023-03-31 22:17:42,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-03-31 22:17:42,436 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:17:42,436 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:17:42,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 22:17:42,436 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:17:42,437 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:17:42,437 INFO L85 PathProgramCache]: Analyzing trace with hash -684635776, now seen corresponding path program 1 times [2023-03-31 22:17:42,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:17:42,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349098333] [2023-03-31 22:17:42,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:17:42,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:17:42,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:17:42,782 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 10 proven. 44 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 22:17:42,782 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:17:42,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349098333] [2023-03-31 22:17:42,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349098333] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:17:42,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059026194] [2023-03-31 22:17:42,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:17:42,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:17:42,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:17:42,789 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 22:17:42,809 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 22:17:42,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:17:42,947 INFO L262 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 22:17:42,956 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:17:43,126 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 22:17:43,126 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 22:17:43,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059026194] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:17:43,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 22:17:43,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-03-31 22:17:43,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449663563] [2023-03-31 22:17:43,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:17:43,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:17:43,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:17:43,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:17:43,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:17:43,129 INFO L87 Difference]: Start difference. First operand 714 states and 1225 transitions. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 22:17:44,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:17:44,583 INFO L93 Difference]: Finished difference Result 1907 states and 3294 transitions. [2023-03-31 22:17:44,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:17:44,584 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 115 [2023-03-31 22:17:44,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:17:44,593 INFO L225 Difference]: With dead ends: 1907 [2023-03-31 22:17:44,593 INFO L226 Difference]: Without dead ends: 1198 [2023-03-31 22:17:44,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-03-31 22:17:44,598 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 799 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1131 mSolverCounterSat, 585 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 799 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 585 IncrementalHoareTripleChecker+Valid, 1131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-03-31 22:17:44,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [799 Valid, 46 Invalid, 1716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [585 Valid, 1131 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-03-31 22:17:44,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1198 states. [2023-03-31 22:17:44,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1198 to 1176. [2023-03-31 22:17:44,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 1148 states have (on average 1.5609756097560976) internal successors, (1792), 1154 states have internal predecessors, (1792), 11 states have call successors, (11), 11 states have call predecessors, (11), 16 states have return successors, (50), 10 states have call predecessors, (50), 10 states have call successors, (50) [2023-03-31 22:17:44,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 1853 transitions. [2023-03-31 22:17:44,656 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 1853 transitions. Word has length 115 [2023-03-31 22:17:44,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:17:44,658 INFO L495 AbstractCegarLoop]: Abstraction has 1176 states and 1853 transitions. [2023-03-31 22:17:44,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 22:17:44,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 1853 transitions. [2023-03-31 22:17:44,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2023-03-31 22:17:44,668 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:17:44,670 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-03-31 22:17:44,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 22:17:44,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:17:44,882 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:17:44,882 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:17:44,883 INFO L85 PathProgramCache]: Analyzing trace with hash -366418167, now seen corresponding path program 1 times [2023-03-31 22:17:44,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:17:44,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083923899] [2023-03-31 22:17:44,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:17:44,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:17:44,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:17:45,231 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 73 proven. 48 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-03-31 22:17:45,232 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:17:45,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083923899] [2023-03-31 22:17:45,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083923899] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:17:45,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190539019] [2023-03-31 22:17:45,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:17:45,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:17:45,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:17:45,237 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:17:45,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 22:17:45,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:17:45,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 22:17:45,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:17:45,496 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 159 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 22:17:45,496 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:17:45,755 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 73 proven. 48 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-03-31 22:17:45,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190539019] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:17:45,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [895175867] [2023-03-31 22:17:45,789 INFO L159 IcfgInterpreter]: Started Sifa with 77 locations of interest [2023-03-31 22:17:45,789 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:17:45,792 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:17:45,796 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:17:45,796 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:17:45,991 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 46 for LOIs [2023-03-31 22:17:46,150 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 28 [2023-03-31 22:17:46,301 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 33 [2023-03-31 22:17:47,177 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 50 for LOIs [2023-03-31 22:17:47,248 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 28 [2023-03-31 22:17:48,306 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 33 [2023-03-31 22:17:49,049 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 39661 conjuctions. This might take some time... [2023-03-31 22:17:53,198 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 1275 conjuctions.