/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1252a.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 23:02:52,017 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 23:02:52,019 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 23:02:52,101 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 23:02:52,117 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 23:02:52,119 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 23:02:52,120 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 23:02:52,123 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 23:02:52,124 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 23:02:52,125 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 23:02:52,127 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 23:02:52,131 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 23:02:52,132 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 23:02:52,133 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 23:02:52,134 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 23:02:52,135 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 23:02:52,141 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 23:02:52,146 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 23:02:52,146 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 23:02:52,147 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 23:02:52,150 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-01-31 23:02:52,160 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 23:02:52,160 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 23:02:52,162 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 23:02:52,162 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 23:02:52,162 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 23:02:52,162 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 23:02:52,162 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 23:02:52,162 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 23:02:52,162 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 23:02:52,162 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 23:02:52,163 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 23:02:52,163 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 23:02:52,164 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 23:02:52,164 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 23:02:52,164 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 23:02:52,164 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 23:02:52,164 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 23:02:52,164 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 23:02:52,164 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 23:02:52,164 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 23:02:52,164 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 23:02:52,165 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 23:02:52,165 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 23:02:52,165 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 23:02:52,346 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 23:02:52,371 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 23:02:52,373 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 23:02:52,373 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 23:02:52,377 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 23:02:52,378 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1252a.c [2022-01-31 23:02:52,434 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/101bd9f88/4589de9294ef4a069958b18601d183db/FLAG4a658aa7e [2022-01-31 23:02:52,796 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 23:02:52,797 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1252a.c [2022-01-31 23:02:52,801 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/101bd9f88/4589de9294ef4a069958b18601d183db/FLAG4a658aa7e [2022-01-31 23:02:53,220 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/101bd9f88/4589de9294ef4a069958b18601d183db [2022-01-31 23:02:53,222 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 23:02:53,227 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 23:02:53,233 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 23:02:53,233 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 23:02:53,235 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 23:02:53,236 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 11:02:53" (1/1) ... [2022-01-31 23:02:53,237 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12c1f7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:02:53, skipping insertion in model container [2022-01-31 23:02:53,237 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 11:02:53" (1/1) ... [2022-01-31 23:02:53,247 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 23:02:53,262 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 23:02:53,432 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1252a.c[1897,1910] [2022-01-31 23:02:53,457 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 23:02:53,472 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 23:02:53,485 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1252a.c[1897,1910] [2022-01-31 23:02:53,485 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 23:02:53,493 INFO L208 MainTranslator]: Completed translation [2022-01-31 23:02:53,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:02:53 WrapperNode [2022-01-31 23:02:53,494 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 23:02:53,494 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 23:02:53,494 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 23:02:53,494 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 23:02:53,519 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:02:53" (1/1) ... [2022-01-31 23:02:53,520 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:02:53" (1/1) ... [2022-01-31 23:02:53,524 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:02:53" (1/1) ... [2022-01-31 23:02:53,524 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:02:53" (1/1) ... [2022-01-31 23:02:53,529 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:02:53" (1/1) ... [2022-01-31 23:02:53,535 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:02:53" (1/1) ... [2022-01-31 23:02:53,536 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:02:53" (1/1) ... [2022-01-31 23:02:53,537 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 23:02:53,538 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 23:02:53,538 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 23:02:53,538 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 23:02:53,539 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:02:53" (1/1) ... [2022-01-31 23:02:53,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 23:02:53,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 23:02:53,580 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) [2022-01-31 23:02:53,598 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 [2022-01-31 23:02:53,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 23:02:53,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 23:02:53,613 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 23:02:53,613 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2022-01-31 23:02:53,613 INFO L138 BoogieDeclarations]: Found implementation of procedure fmax_float [2022-01-31 23:02:53,614 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2022-01-31 23:02:53,614 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 23:02:53,614 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 23:02:53,614 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 23:02:53,614 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 23:02:53,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 23:02:53,614 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2022-01-31 23:02:53,615 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 23:02:53,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2022-01-31 23:02:53,615 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 23:02:53,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 23:02:53,617 INFO L130 BoogieDeclarations]: Found specification of procedure fmax_float [2022-01-31 23:02:53,617 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2022-01-31 23:02:53,617 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 23:02:53,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 23:02:53,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 23:02:53,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 23:02:53,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 23:02:53,617 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2022-01-31 23:02:53,688 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 23:02:53,689 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 23:02:53,803 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 23:02:53,808 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 23:02:53,809 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-01-31 23:02:53,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 11:02:53 BoogieIcfgContainer [2022-01-31 23:02:53,810 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 23:02:53,811 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 23:02:53,811 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 23:02:53,813 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 23:02:53,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 11:02:53" (1/3) ... [2022-01-31 23:02:53,814 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bca22cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 11:02:53, skipping insertion in model container [2022-01-31 23:02:53,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:02:53" (2/3) ... [2022-01-31 23:02:53,814 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bca22cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 11:02:53, skipping insertion in model container [2022-01-31 23:02:53,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 11:02:53" (3/3) ... [2022-01-31 23:02:53,815 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1252a.c [2022-01-31 23:02:53,818 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 23:02:53,818 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 23:02:53,870 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 23:02:53,876 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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, mLoopAccelerationTechnique=JORDAN [2022-01-31 23:02:53,876 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 23:02:53,890 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 32 states have internal predecessors, (45), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 23:02:53,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 23:02:53,895 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:02:53,895 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:02:53,896 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:02:53,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:02:53,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1701413730, now seen corresponding path program 1 times [2022-01-31 23:02:53,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:02:53,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212732777] [2022-01-31 23:02:53,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:02:53,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:02:53,943 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:02:53,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:02:54,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:02:54,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:02:54,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:02:54,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:02:54,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-31 23:02:54,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:02:54,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:02:54,064 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:02:54,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212732777] [2022-01-31 23:02:54,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [212732777] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:02:54,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:02:54,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:02:54,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071456583] [2022-01-31 23:02:54,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:02:54,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:02:54,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:02:54,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:02:54,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:02:54,092 INFO L87 Difference]: Start difference. First operand has 44 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 32 states have internal predecessors, (45), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 23:02:54,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:02:54,195 INFO L93 Difference]: Finished difference Result 79 states and 107 transitions. [2022-01-31 23:02:54,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 23:02:54,197 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2022-01-31 23:02:54,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:02:54,202 INFO L225 Difference]: With dead ends: 79 [2022-01-31 23:02:54,202 INFO L226 Difference]: Without dead ends: 40 [2022-01-31 23:02:54,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 23:02:54,206 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 40 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:02:54,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 47 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:02:54,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-31 23:02:54,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-01-31 23:02:54,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 23:02:54,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2022-01-31 23:02:54,234 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 22 [2022-01-31 23:02:54,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:02:54,234 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2022-01-31 23:02:54,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 23:02:54,235 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2022-01-31 23:02:54,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-31 23:02:54,236 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:02:54,236 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:02:54,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 23:02:54,236 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:02:54,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:02:54,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1066470796, now seen corresponding path program 1 times [2022-01-31 23:02:54,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:02:54,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [684681302] [2022-01-31 23:02:54,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:02:54,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:02:54,240 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:02:54,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:02:54,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:02:54,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:02:54,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:02:54,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:02:54,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-31 23:02:54,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:02:54,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:02:54,357 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:02:54,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [684681302] [2022-01-31 23:02:54,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [684681302] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:02:54,358 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:02:54,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 23:02:54,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045449826] [2022-01-31 23:02:54,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:02:54,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 23:02:54,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:02:54,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 23:02:54,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 23:02:54,359 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 23:02:54,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:02:54,479 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2022-01-31 23:02:54,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 23:02:54,480 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-01-31 23:02:54,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:02:54,482 INFO L225 Difference]: With dead ends: 59 [2022-01-31 23:02:54,482 INFO L226 Difference]: Without dead ends: 44 [2022-01-31 23:02:54,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-01-31 23:02:54,483 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 40 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:02:54,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 43 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:02:54,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-01-31 23:02:54,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-01-31 23:02:54,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 32 states have (on average 1.25) internal successors, (40), 32 states have internal predecessors, (40), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 23:02:54,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2022-01-31 23:02:54,491 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 23 [2022-01-31 23:02:54,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:02:54,491 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2022-01-31 23:02:54,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 23:02:54,492 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2022-01-31 23:02:54,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 23:02:54,492 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:02:54,492 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-31 23:02:54,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 23:02:54,493 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:02:54,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:02:54,493 INFO L85 PathProgramCache]: Analyzing trace with hash 666186437, now seen corresponding path program 1 times [2022-01-31 23:02:54,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:02:54,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1610369605] [2022-01-31 23:02:54,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:02:54,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:02:54,495 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:02:54,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:02:54,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:02:54,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:02:54,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:02:54,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:02:54,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-31 23:02:54,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:02:54,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:02:54,572 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:02:54,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1610369605] [2022-01-31 23:02:54,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1610369605] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:02:54,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:02:54,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 23:02:54,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737639631] [2022-01-31 23:02:54,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:02:54,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 23:02:54,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:02:54,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 23:02:54,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 23:02:54,573 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 23:02:54,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:02:54,685 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2022-01-31 23:02:54,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 23:02:54,685 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2022-01-31 23:02:54,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:02:54,686 INFO L225 Difference]: With dead ends: 63 [2022-01-31 23:02:54,686 INFO L226 Difference]: Without dead ends: 48 [2022-01-31 23:02:54,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-01-31 23:02:54,687 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 40 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:02:54,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 43 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:02:54,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-01-31 23:02:54,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2022-01-31 23:02:54,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 32 states have (on average 1.25) internal successors, (40), 32 states have internal predecessors, (40), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 23:02:54,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2022-01-31 23:02:54,694 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 26 [2022-01-31 23:02:54,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:02:54,694 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2022-01-31 23:02:54,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 23:02:54,694 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2022-01-31 23:02:54,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 23:02:54,695 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:02:54,695 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-31 23:02:54,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 23:02:54,695 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:02:54,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:02:54,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1130764922, now seen corresponding path program 1 times [2022-01-31 23:02:54,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:02:54,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [503810688] [2022-01-31 23:02:54,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:02:54,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:02:54,697 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:02:54,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-31 23:02:54,710 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-01-31 23:02:54,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-31 23:02:54,742 INFO L133 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2022-01-31 23:02:54,743 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-01-31 23:02:54,745 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-31 23:02:54,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 23:02:54,752 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-01-31 23:02:54,754 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-31 23:02:54,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 11:02:54 BoogieIcfgContainer [2022-01-31 23:02:54,770 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-31 23:02:54,771 INFO L158 Benchmark]: Toolchain (without parser) took 1543.33ms. Allocated memory is still 191.9MB. Free memory was 143.9MB in the beginning and 75.8MB in the end (delta: 68.1MB). Peak memory consumption was 67.8MB. Max. memory is 8.0GB. [2022-01-31 23:02:54,771 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 191.9MB. Free memory is still 160.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 23:02:54,772 INFO L158 Benchmark]: CACSL2BoogieTranslator took 260.70ms. Allocated memory is still 191.9MB. Free memory was 143.7MB in the beginning and 169.1MB in the end (delta: -25.4MB). Peak memory consumption was 13.3MB. Max. memory is 8.0GB. [2022-01-31 23:02:54,772 INFO L158 Benchmark]: Boogie Preprocessor took 43.33ms. Allocated memory is still 191.9MB. Free memory was 169.1MB in the beginning and 167.5MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-31 23:02:54,774 INFO L158 Benchmark]: RCFGBuilder took 272.06ms. Allocated memory is still 191.9MB. Free memory was 167.5MB in the beginning and 155.0MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-01-31 23:02:54,774 INFO L158 Benchmark]: TraceAbstraction took 959.19ms. Allocated memory is still 191.9MB. Free memory was 154.4MB in the beginning and 75.8MB in the end (delta: 78.6MB). Peak memory consumption was 78.6MB. Max. memory is 8.0GB. [2022-01-31 23:02:54,775 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 191.9MB. Free memory is still 160.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 260.70ms. Allocated memory is still 191.9MB. Free memory was 143.7MB in the beginning and 169.1MB in the end (delta: -25.4MB). Peak memory consumption was 13.3MB. Max. memory is 8.0GB. * Boogie Preprocessor took 43.33ms. Allocated memory is still 191.9MB. Free memory was 169.1MB in the beginning and 167.5MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 272.06ms. Allocated memory is still 191.9MB. Free memory was 167.5MB in the beginning and 155.0MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 959.19ms. Allocated memory is still 191.9MB. Free memory was 154.4MB in the beginning and 75.8MB in the end (delta: 78.6MB). Peak memory consumption was 78.6MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 81]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 80, overapproximation of someUnaryFLOAToperation at line 74. Possible FailurePath: [L74] float x = -0.0f; [L75] float y = 0.0f; [L77] CALL, EXPR fmax_float(x, y) [L45] CALL, EXPR __fpclassify_float(x) [L22] __uint32_t w; [L25] ieee_float_shape_type gf_u; [L26] gf_u.value = (x) [L27] EXPR gf_u.word [L27] (w) = gf_u.word [L30] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L32-L33] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L35-L36] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L38] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L41] return 0; [L45] RET, EXPR __fpclassify_float(x) [L45] COND TRUE __fpclassify_float(x) == 0 [L46] return y; [L77] RET, EXPR fmax_float(x, y) [L77] float res = fmax_float(x, y); [L80] EXPR res == 0.0f && __signbit_float(res) == 0 [L80] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L81] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 47 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.9s, OverallIterations: 4, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 128 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 120 mSDsluCounter, 133 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 10 mSDsCounter, 51 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 323 IncrementalHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 51 mSolverCounterUnsat, 123 mSDtfsCounter, 323 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=0, InterpolantAutomatonStates: 19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 4 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-01-31 23:02:54,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...