/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_label29.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:22:55,549 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:22:55,551 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:22:55,593 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:22:55,593 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:22:55,596 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:22:55,600 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:22:55,602 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:22:55,603 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:22:55,609 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:22:55,611 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:22:55,612 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:22:55,612 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:22:55,615 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:22:55,616 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:22:55,617 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:22:55,618 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:22:55,619 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:22:55,621 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:22:55,626 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:22:55,627 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:22:55,628 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:22:55,629 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:22:55,630 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:22:55,638 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 04:22:55,641 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:22:55,642 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:22:55,643 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:22:55,644 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:22:55,644 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:22:55,644 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:22:55,645 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:22:55,645 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:22:55,645 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:22:55,646 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:22:55,647 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:22:55,650 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 04:22:55,677 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:22:55,677 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:22:55,678 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:22:55,678 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:22:55,679 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:22:55,679 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:22:55,679 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:22:55,679 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:22:55,679 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:22:55,680 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:22:55,680 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:22:55,680 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:22:55,681 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:22:55,681 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:22:55,681 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:22:55,681 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:22:55,681 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:22:55,681 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:22:55,682 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:22:55,682 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:22:55,682 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:22:55,682 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:22:55,682 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:22:55,683 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:22:55,683 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:22:55,683 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:22:55,683 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:22:55,683 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:22:55,683 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:22:55,684 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:22:55,684 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:22:55,684 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:22:55,684 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:22:55,684 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:22:55,684 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:22:55,685 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:22:55,685 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:22:55,685 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:22:55,685 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:22:55,685 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:22:55,685 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:22:55,685 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:22:55,920 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:22:55,944 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:22:55,946 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:22:55,948 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:22:55,949 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:22:55,950 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label29.c [2023-04-01 04:22:57,183 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:22:57,592 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:22:57,593 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label29.c [2023-04-01 04:22:57,619 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a938a7358/ba0353d00c104445b943206d4269a5fa/FLAG9ad01d677 [2023-04-01 04:22:57,636 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a938a7358/ba0353d00c104445b943206d4269a5fa [2023-04-01 04:22:57,639 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:22:57,640 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:22:57,643 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:22:57,644 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:22:57,647 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:22:57,647 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:22:57" (1/1) ... [2023-04-01 04:22:57,649 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7eeb3f84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:22:57, skipping insertion in model container [2023-04-01 04:22:57,649 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:22:57" (1/1) ... [2023-04-01 04:22:57,656 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:22:57,738 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:22:57,971 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_label29.c[9671,9684] [2023-04-01 04:22:58,461 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:22:58,474 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:22:58,509 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_label29.c[9671,9684] [2023-04-01 04:22:58,725 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:22:58,743 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:22:58,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:22:58 WrapperNode [2023-04-01 04:22:58,744 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:22:58,745 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:22:58,745 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:22:58,745 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:22:58,757 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:22:58" (1/1) ... [2023-04-01 04:22:58,757 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:22:58" (1/1) ... [2023-04-01 04:22:58,816 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:22:58" (1/1) ... [2023-04-01 04:22:58,816 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:22:58" (1/1) ... [2023-04-01 04:22:58,905 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:22:58" (1/1) ... [2023-04-01 04:22:58,921 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:22:58" (1/1) ... [2023-04-01 04:22:58,967 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:22:58" (1/1) ... [2023-04-01 04:22:58,978 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:22:58" (1/1) ... [2023-04-01 04:22:59,001 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:22:59,002 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:22:59,002 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:22:59,002 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:22:59,003 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:22:58" (1/1) ... [2023-04-01 04:22:59,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:22:59,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:22:59,066 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 04:22:59,090 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 04:22:59,107 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:22:59,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:22:59,108 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:22:59,108 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:22:59,108 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:22:59,108 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:22:59,108 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:22:59,108 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:22:59,108 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:22:59,108 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:22:59,109 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:22:59,109 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:22:59,109 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:22:59,109 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:22:59,109 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:22:59,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:22:59,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:22:59,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:22:59,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:22:59,109 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:22:59,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:22:59,199 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:22:59,201 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:23:02,430 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:23:11,705 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:23:11,706 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:23:11,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:23:11 BoogieIcfgContainer [2023-04-01 04:23:11,708 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:23:11,710 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:23:11,711 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:23:11,713 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:23:11,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:22:57" (1/3) ... [2023-04-01 04:23:11,714 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dfdc059 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:23:11, skipping insertion in model container [2023-04-01 04:23:11,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:22:58" (2/3) ... [2023-04-01 04:23:11,714 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dfdc059 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:23:11, skipping insertion in model container [2023-04-01 04:23:11,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:23:11" (3/3) ... [2023-04-01 04:23:11,716 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label29.c [2023-04-01 04:23:11,733 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:23:11,734 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:23:11,788 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:23:11,797 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;@7f206bee, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:23:11,797 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:23:11,804 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 04:23:11,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:23:11,810 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:23:11,811 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:23:11,811 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:23:11,817 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:23:11,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1887790134, now seen corresponding path program 1 times [2023-04-01 04:23:11,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:23:11,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530053704] [2023-04-01 04:23:11,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:23:11,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:23:11,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:23:12,377 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 04:23:12,377 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:23:12,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530053704] [2023-04-01 04:23:12,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530053704] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:23:12,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:23:12,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:23:12,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943785972] [2023-04-01 04:23:12,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:23:12,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:23:12,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:23:12,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:23:12,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:23:12,425 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 04:23:14,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:23:14,068 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2023-04-01 04:23:14,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:23:14,071 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 04:23:14,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:23:14,094 INFO L225 Difference]: With dead ends: 718 [2023-04-01 04:23:14,094 INFO L226 Difference]: Without dead ends: 471 [2023-04-01 04:23:14,104 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 04:23:14,108 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 245 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-01 04:23:14,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 85 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-01 04:23:14,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-04-01 04:23:14,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 466. [2023-04-01 04:23:14,188 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 04:23:14,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 851 transitions. [2023-04-01 04:23:14,192 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 851 transitions. Word has length 11 [2023-04-01 04:23:14,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:23:14,192 INFO L495 AbstractCegarLoop]: Abstraction has 466 states and 851 transitions. [2023-04-01 04:23:14,193 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 04:23:14,193 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 851 transitions. [2023-04-01 04:23:14,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 04:23:14,194 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:23:14,194 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 04:23:14,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:23:14,195 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:23:14,195 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:23:14,195 INFO L85 PathProgramCache]: Analyzing trace with hash 2097653995, now seen corresponding path program 1 times [2023-04-01 04:23:14,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:23:14,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886815876] [2023-04-01 04:23:14,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:23:14,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:23:14,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:23:14,389 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 04:23:14,389 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:23:14,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886815876] [2023-04-01 04:23:14,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886815876] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:23:14,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:23:14,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:23:14,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996427332] [2023-04-01 04:23:14,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:23:14,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:23:14,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:23:14,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:23:14,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:23:14,393 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 04:23:16,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:23:16,598 INFO L93 Difference]: Finished difference Result 1406 states and 2592 transitions. [2023-04-01 04:23:16,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 04:23:16,601 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 04:23:16,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:23:16,606 INFO L225 Difference]: With dead ends: 1406 [2023-04-01 04:23:16,606 INFO L226 Difference]: Without dead ends: 945 [2023-04-01 04:23:16,607 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 04:23:16,608 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 735 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 1376 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 735 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 1596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 1376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:23:16,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [735 Valid, 51 Invalid, 1596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 1376 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-04-01 04:23:16,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2023-04-01 04:23:16,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 914. [2023-04-01 04:23:16,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 914 states, 896 states have (on average 1.5535714285714286) internal successors, (1392), 900 states have internal predecessors, (1392), 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 04:23:16,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 1423 transitions. [2023-04-01 04:23:16,665 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 1423 transitions. Word has length 21 [2023-04-01 04:23:16,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:23:16,666 INFO L495 AbstractCegarLoop]: Abstraction has 914 states and 1423 transitions. [2023-04-01 04:23:16,666 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 04:23:16,666 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 1423 transitions. [2023-04-01 04:23:16,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-01 04:23:16,667 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:23:16,667 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 04:23:16,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:23:16,668 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:23:16,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:23:16,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1113921175, now seen corresponding path program 1 times [2023-04-01 04:23:16,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:23:16,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708453285] [2023-04-01 04:23:16,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:23:16,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:23:16,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:23:16,831 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 04:23:16,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:23:16,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708453285] [2023-04-01 04:23:16,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708453285] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:23:16,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:23:16,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:23:16,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319097709] [2023-04-01 04:23:16,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:23:16,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:23:16,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:23:16,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:23:16,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:23:16,836 INFO L87 Difference]: Start difference. First operand 914 states and 1423 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 04:23:18,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:23:18,851 INFO L93 Difference]: Finished difference Result 2783 states and 4390 transitions. [2023-04-01 04:23:18,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:23:18,852 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 04:23:18,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:23:18,860 INFO L225 Difference]: With dead ends: 2783 [2023-04-01 04:23:18,861 INFO L226 Difference]: Without dead ends: 1874 [2023-04-01 04:23:18,863 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 04:23:18,864 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 716 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 1303 mSolverCounterSat, 447 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s 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, 1.9s IncrementalHoareTripleChecker+Time [2023-04-01 04:23:18,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [716 Valid, 55 Invalid, 1750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [447 Valid, 1303 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-04-01 04:23:18,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1874 states. [2023-04-01 04:23:18,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1874 to 1193. [2023-04-01 04:23:18,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1193 states, 1157 states have (on average 1.4330164217804666) internal successors, (1658), 1175 states have internal predecessors, (1658), 9 states have call successors, (9), 9 states have call predecessors, (9), 26 states have return successors, (66), 8 states have call predecessors, (66), 8 states have call successors, (66) [2023-04-01 04:23:18,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1193 states to 1193 states and 1733 transitions. [2023-04-01 04:23:18,918 INFO L78 Accepts]: Start accepts. Automaton has 1193 states and 1733 transitions. Word has length 31 [2023-04-01 04:23:18,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:23:18,918 INFO L495 AbstractCegarLoop]: Abstraction has 1193 states and 1733 transitions. [2023-04-01 04:23:18,919 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 04:23:18,919 INFO L276 IsEmpty]: Start isEmpty. Operand 1193 states and 1733 transitions. [2023-04-01 04:23:18,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-04-01 04:23:18,921 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:23:18,922 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 04:23:18,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:23:18,922 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:23:18,923 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:23:18,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1660894488, now seen corresponding path program 1 times [2023-04-01 04:23:18,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:23:18,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582824501] [2023-04-01 04:23:18,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:23:18,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:23:18,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:23:19,132 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 04:23:19,132 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:23:19,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582824501] [2023-04-01 04:23:19,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582824501] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:23:19,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767621822] [2023-04-01 04:23:19,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:23:19,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:23:19,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:23:19,143 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 04:23:19,167 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 04:23:19,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:23:19,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:23:19,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:23:19,362 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 04:23:19,362 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:23:19,483 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 04:23:19,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767621822] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:23:19,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2101092510] [2023-04-01 04:23:19,502 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2023-04-01 04:23:19,502 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:23:19,521 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:23:19,525 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:23:19,526 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:23:19,818 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 50 for LOIs [2023-04-01 04:23:20,204 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 59 [2023-04-01 04:23:22,638 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 33038 conjuctions. This might take some time... [2023-04-01 04:23:23,247 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 63 conjuctions. [2023-04-01 04:23:38,919 WARN L223 SmtUtils]: Spent 11.09s on a formula simplification that was a NOOP. DAG size: 892 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)