/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/Problem17_label32.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:22:18,541 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:22:18,542 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:22:18,572 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:22:18,572 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:22:18,574 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:22:18,577 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:22:18,578 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:22:18,579 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:22:18,583 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:22:18,584 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:22:18,585 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:22:18,585 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:22:18,587 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:22:18,588 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:22:18,588 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:22:18,589 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:22:18,590 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:22:18,591 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:22:18,595 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:22:18,595 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:22:18,596 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:22:18,597 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:22:18,598 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:22:18,603 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-31 22:22:18,609 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:22:18,609 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:22:18,609 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:22:18,611 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 22:22:18,632 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:22:18,633 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:22:18,633 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:22:18,633 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:22:18,634 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:22:18,634 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:22:18,634 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:22:18,634 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:22:18,634 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:22:18,634 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:22:18,635 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:22:18,635 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:22:18,635 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:22:18,635 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:22:18,635 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:22:18,635 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:22:18,636 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:22:18,636 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:22:18,636 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:22:18,636 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:22:18,636 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:22:18,636 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:22:18,636 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:22:18,637 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:22:18,637 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:22:18,637 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:22:18,637 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:22:18,637 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:22:18,637 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:22:18,637 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:22:18,637 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:22:18,637 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:22:18,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:22:18,638 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:22:18,638 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:22:18,638 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:22:18,638 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:22:18,638 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:22:18,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:22:18,638 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:22:18,638 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:22:18,639 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:22:18,821 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:22:18,846 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:22:18,847 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:22:18,848 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:22:18,849 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:22:18,849 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label32.c [2023-03-31 22:22:19,834 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:22:20,192 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:22:20,193 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label32.c [2023-03-31 22:22:20,212 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8a273b4c/b5a3fb2d979b42b8a7c92dd9a82569df/FLAGabeb2f19f [2023-03-31 22:22:20,226 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8a273b4c/b5a3fb2d979b42b8a7c92dd9a82569df [2023-03-31 22:22:20,228 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:22:20,229 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:22:20,232 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:22:20,232 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:22:20,235 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:22:20,236 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:22:20" (1/1) ... [2023-03-31 22:22:20,237 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c0b24e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:22:20, skipping insertion in model container [2023-03-31 22:22:20,237 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:22:20" (1/1) ... [2023-03-31 22:22:20,242 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:22:20,303 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:22:20,504 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_label32.c[7145,7158] [2023-03-31 22:22:20,849 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:22:20,856 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:22:20,869 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_label32.c[7145,7158] [2023-03-31 22:22:21,046 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:22:21,058 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:22:21,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:22:21 WrapperNode [2023-03-31 22:22:21,059 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:22:21,059 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:22:21,059 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:22:21,059 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:22:21,067 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:22:21" (1/1) ... [2023-03-31 22:22:21,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:22:21" (1/1) ... [2023-03-31 22:22:21,096 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:22:21" (1/1) ... [2023-03-31 22:22:21,096 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:22:21" (1/1) ... [2023-03-31 22:22:21,132 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:22:21" (1/1) ... [2023-03-31 22:22:21,142 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:22:21" (1/1) ... [2023-03-31 22:22:21,161 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:22:21" (1/1) ... [2023-03-31 22:22:21,166 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:22:21" (1/1) ... [2023-03-31 22:22:21,175 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:22:21,175 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:22:21,175 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:22:21,175 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:22:21,176 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:22:21" (1/1) ... [2023-03-31 22:22:21,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:22:21,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:22:21,194 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 22:22:21,214 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 22:22:21,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:22:21,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:22:21,234 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:22:21,234 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 22:22:21,234 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 22:22:21,234 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:22:21,234 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 22:22:21,234 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 22:22:21,234 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:22:21,234 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:22:21,234 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:22:21,234 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:22:21,234 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:22:21,235 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:22:21,235 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:22:21,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:22:21,235 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:22:21,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:22:21,235 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:22:21,235 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:22:21,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:22:21,301 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:22:21,303 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:22:23,437 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:22:31,672 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:22:31,672 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 22:22:31,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:22:31 BoogieIcfgContainer [2023-03-31 22:22:31,675 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:22:31,676 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:22:31,676 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:22:31,678 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:22:31,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:22:20" (1/3) ... [2023-03-31 22:22:31,679 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e6d632b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:22:31, skipping insertion in model container [2023-03-31 22:22:31,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:22:21" (2/3) ... [2023-03-31 22:22:31,679 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e6d632b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:22:31, skipping insertion in model container [2023-03-31 22:22:31,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:22:31" (3/3) ... [2023-03-31 22:22:31,680 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label32.c [2023-03-31 22:22:31,693 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:22:31,694 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:22:31,729 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:22:31,734 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;@4082e8ca, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:22:31,734 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:22:31,739 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 22:22:31,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 22:22:31,744 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:22:31,744 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:22:31,744 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:22:31,748 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:22:31,748 INFO L85 PathProgramCache]: Analyzing trace with hash -2084307991, now seen corresponding path program 1 times [2023-03-31 22:22:31,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:22:31,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265932474] [2023-03-31 22:22:31,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:22:31,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:22:31,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:22:32,059 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 22:22:32,059 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:22:32,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265932474] [2023-03-31 22:22:32,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265932474] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:22:32,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:22:32,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:22:32,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889910773] [2023-03-31 22:22:32,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:22:32,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:22:32,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:22:32,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:22:32,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:22:32,092 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 22:22:33,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:22:33,421 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2023-03-31 22:22:33,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:22:33,438 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 22:22:33,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:22:33,455 INFO L225 Difference]: With dead ends: 718 [2023-03-31 22:22:33,455 INFO L226 Difference]: Without dead ends: 471 [2023-03-31 22:22:33,462 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 22:22:33,467 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 242 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-03-31 22:22:33,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 195 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 704 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-03-31 22:22:33,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-03-31 22:22:33,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 469. [2023-03-31 22:22:33,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 459 states have (on average 1.5751633986928104) internal successors, (723), 459 states have internal predecessors, (723), 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 22:22:33,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 734 transitions. [2023-03-31 22:22:33,519 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 734 transitions. Word has length 11 [2023-03-31 22:22:33,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:22:33,520 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 734 transitions. [2023-03-31 22:22:33,520 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 22:22:33,520 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 734 transitions. [2023-03-31 22:22:33,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-03-31 22:22:33,521 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:22:33,521 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] [2023-03-31 22:22:33,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:22:33,521 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:22:33,522 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:22:33,522 INFO L85 PathProgramCache]: Analyzing trace with hash -240166194, now seen corresponding path program 1 times [2023-03-31 22:22:33,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:22:33,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483460573] [2023-03-31 22:22:33,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:22:33,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:22:33,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:22:33,764 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:22:33,764 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:22:33,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483460573] [2023-03-31 22:22:33,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483460573] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:22:33,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172796569] [2023-03-31 22:22:33,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:22:33,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:22:33,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:22:33,767 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 22:22:33,770 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 22:22:33,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:22:33,852 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 9 conjunts are in the unsatisfiable core [2023-03-31 22:22:33,855 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:22:34,702 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:22:34,702 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:22:35,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172796569] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:22:35,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1317638808] [2023-03-31 22:22:35,265 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-03-31 22:22:35,265 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:22:35,267 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:22:35,270 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:22:35,270 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:22:35,452 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 50 for LOIs [2023-03-31 22:22:35,638 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 42 [2023-03-31 22:22:36,528 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 22402 conjuctions. This might take some time... [2023-03-31 22:22:36,876 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 334 conjuctions. [2023-03-31 22:22:36,936 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 19 [2023-03-31 22:22:36,983 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 5852 conjuctions. This might take some time... [2023-03-31 22:22:37,083 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 286 conjuctions. [2023-03-31 22:22:37,717 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 45 for LOIs [2023-03-31 22:22:37,839 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 42 [2023-03-31 22:22:38,732 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 9308 conjuctions. This might take some time... [2023-03-31 22:22:38,966 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 332 conjuctions. [2023-03-31 22:23:05,871 WARN L223 SmtUtils]: Spent 8.20s on a formula simplification that was a NOOP. DAG size: 519 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)