/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/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/float-newlib/double_req_bl_1250.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-02-01 00:19:24,888 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-01 00:19:24,889 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-01 00:19:24,928 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-01 00:19:24,980 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-01 00:19:24,981 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-01 00:19:24,982 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-01 00:19:24,983 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-02-01 00:19:24,994 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-01 00:19:24,994 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-01 00:19:24,996 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-01 00:19:24,996 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-01 00:19:24,996 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-01 00:19:24,996 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-01 00:19:24,996 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-01 00:19:24,996 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-01 00:19:24,996 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-01 00:19:24,996 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-01 00:19:24,997 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-01 00:19:24,997 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-01 00:19:24,997 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-01 00:19:24,997 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-01 00:19:24,998 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-01 00:19:24,998 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-01 00:19:24,998 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-01 00:19:24,998 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-01 00:19:24,998 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-01 00:19:24,998 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-01 00:19:24,998 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-01 00:19:25,233 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-01 00:19:25,252 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-01 00:19:25,254 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-01 00:19:25,255 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-01 00:19:25,258 INFO L275 PluginConnector]: CDTParser initialized [2022-02-01 00:19:25,259 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/double_req_bl_1250.c [2022-02-01 00:19:25,319 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ac9179ee/13febf1918374be8bbe8195ceb73923a/FLAGd891c9b6f [2022-02-01 00:19:25,637 INFO L306 CDTParser]: Found 1 translation units. [2022-02-01 00:19:25,637 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/double_req_bl_1250.c [2022-02-01 00:19:25,643 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ac9179ee/13febf1918374be8bbe8195ceb73923a/FLAGd891c9b6f [2022-02-01 00:19:26,060 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ac9179ee/13febf1918374be8bbe8195ceb73923a [2022-02-01 00:19:26,062 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-01 00:19:26,065 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-01 00:19:26,069 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-01 00:19:26,069 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-01 00:19:26,072 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-01 00:19:26,072 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.02 12:19:26" (1/1) ... [2022-02-01 00:19:26,073 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61e6fa4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:19:26, skipping insertion in model container [2022-02-01 00:19:26,074 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.02 12:19:26" (1/1) ... [2022-02-01 00:19:26,079 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-01 00:19:26,091 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-01 00:19:26,241 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/double_req_bl_1250.c[1965,1978] [2022-02-01 00:19:26,244 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-01 00:19:26,254 INFO L203 MainTranslator]: Completed pre-run [2022-02-01 00:19:26,272 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/double_req_bl_1250.c[1965,1978] [2022-02-01 00:19:26,272 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-01 00:19:26,282 INFO L208 MainTranslator]: Completed translation [2022-02-01 00:19:26,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:19:26 WrapperNode [2022-02-01 00:19:26,283 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-01 00:19:26,283 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-01 00:19:26,284 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-01 00:19:26,284 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-01 00:19:26,291 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:19:26" (1/1) ... [2022-02-01 00:19:26,291 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:19:26" (1/1) ... [2022-02-01 00:19:26,297 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:19:26" (1/1) ... [2022-02-01 00:19:26,297 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:19:26" (1/1) ... [2022-02-01 00:19:26,303 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:19:26" (1/1) ... [2022-02-01 00:19:26,306 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:19:26" (1/1) ... [2022-02-01 00:19:26,307 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:19:26" (1/1) ... [2022-02-01 00:19:26,309 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-01 00:19:26,310 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-01 00:19:26,310 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-01 00:19:26,310 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-01 00:19:26,317 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:19:26" (1/1) ... [2022-02-01 00:19:26,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-01 00:19:26,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-01 00:19:26,360 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) [2022-02-01 00:19:26,383 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 [2022-02-01 00:19:26,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-01 00:19:26,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-01 00:19:26,403 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-01 00:19:26,403 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_double [2022-02-01 00:19:26,403 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_double [2022-02-01 00:19:26,403 INFO L138 BoogieDeclarations]: Found implementation of procedure fmax_double [2022-02-01 00:19:26,403 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-01 00:19:26,404 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-01 00:19:26,404 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-01 00:19:26,404 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-01 00:19:26,404 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-01 00:19:26,404 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2022-02-01 00:19:26,404 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_double [2022-02-01 00:19:26,405 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_double [2022-02-01 00:19:26,405 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-02-01 00:19:26,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2022-02-01 00:19:26,406 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-01 00:19:26,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-01 00:19:26,408 INFO L130 BoogieDeclarations]: Found specification of procedure fmax_double [2022-02-01 00:19:26,408 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-01 00:19:26,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-01 00:19:26,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-01 00:19:26,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-01 00:19:26,410 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2022-02-01 00:19:26,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-01 00:19:26,468 INFO L234 CfgBuilder]: Building ICFG [2022-02-01 00:19:26,469 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-01 00:19:26,590 INFO L275 CfgBuilder]: Performing block encoding [2022-02-01 00:19:26,595 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-01 00:19:26,595 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-01 00:19:26,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.02 12:19:26 BoogieIcfgContainer [2022-02-01 00:19:26,597 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-01 00:19:26,598 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-01 00:19:26,598 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-01 00:19:26,601 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-01 00:19:26,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.02 12:19:26" (1/3) ... [2022-02-01 00:19:26,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ad893ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.02 12:19:26, skipping insertion in model container [2022-02-01 00:19:26,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:19:26" (2/3) ... [2022-02-01 00:19:26,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ad893ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.02 12:19:26, skipping insertion in model container [2022-02-01 00:19:26,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.02 12:19:26" (3/3) ... [2022-02-01 00:19:26,604 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1250.c [2022-02-01 00:19:26,607 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-01 00:19:26,608 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-01 00:19:26,642 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-01 00:19:26,647 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=QVASR [2022-02-01 00:19:26,648 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-01 00:19:26,658 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 28 states have internal predecessors, (38), 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) [2022-02-01 00:19:26,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-01 00:19:26,665 INFO L506 BasicCegarLoop]: Found error trace [2022-02-01 00:19:26,665 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] [2022-02-01 00:19:26,666 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-01 00:19:26,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-01 00:19:26,670 INFO L85 PathProgramCache]: Analyzing trace with hash 175497070, now seen corresponding path program 1 times [2022-02-01 00:19:26,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-01 00:19:26,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [983314531] [2022-02-01 00:19:26,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-01 00:19:26,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-01 00:19:26,780 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-01 00:19:26,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-01 00:19:26,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-01 00:19:26,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-01 00:19:26,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-01 00:19:26,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-01 00:19:26,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-01 00:19:26,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-01 00:19:26,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-02-01 00:19:27,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-01 00:19:27,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-01 00:19:27,008 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-01 00:19:27,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [983314531] [2022-02-01 00:19:27,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [983314531] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-01 00:19:27,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-01 00:19:27,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-01 00:19:27,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794794819] [2022-02-01 00:19:27,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-01 00:19:27,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-01 00:19:27,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-01 00:19:27,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-01 00:19:27,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-01 00:19:27,039 INFO L87 Difference]: Start difference. First operand has 40 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 28 states have internal predecessors, (38), 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 4.25) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-01 00:19:27,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-01 00:19:27,202 INFO L93 Difference]: Finished difference Result 71 states and 92 transitions. [2022-02-01 00:19:27,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-01 00:19:27,205 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 26 [2022-02-01 00:19:27,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-01 00:19:27,213 INFO L225 Difference]: With dead ends: 71 [2022-02-01 00:19:27,213 INFO L226 Difference]: Without dead ends: 36 [2022-02-01 00:19:27,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-01 00:19:27,220 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 37 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-01 00:19:27,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 43 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-01 00:19:27,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-02-01 00:19:27,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-02-01 00:19:27,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 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) [2022-02-01 00:19:27,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2022-02-01 00:19:27,253 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 26 [2022-02-01 00:19:27,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-01 00:19:27,253 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2022-02-01 00:19:27,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-01 00:19:27,254 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2022-02-01 00:19:27,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-01 00:19:27,255 INFO L506 BasicCegarLoop]: Found error trace [2022-02-01 00:19:27,255 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, 1] [2022-02-01 00:19:27,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-01 00:19:27,256 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-01 00:19:27,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-01 00:19:27,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1646180679, now seen corresponding path program 1 times [2022-02-01 00:19:27,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-01 00:19:27,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1789851196] [2022-02-01 00:19:27,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-01 00:19:27,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-01 00:19:27,260 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-01 00:19:27,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-01 00:19:27,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-01 00:19:27,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-01 00:19:27,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-01 00:19:27,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-01 00:19:27,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-01 00:19:27,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-01 00:19:27,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-01 00:19:27,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-01 00:19:27,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-01 00:19:27,415 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-01 00:19:27,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1789851196] [2022-02-01 00:19:27,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1789851196] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-01 00:19:27,416 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-01 00:19:27,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-01 00:19:27,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917343645] [2022-02-01 00:19:27,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-01 00:19:27,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-01 00:19:27,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-01 00:19:27,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-01 00:19:27,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-01 00:19:27,419 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-01 00:19:27,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-01 00:19:27,594 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2022-02-01 00:19:27,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-01 00:19:27,595 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2022-02-01 00:19:27,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-01 00:19:27,599 INFO L225 Difference]: With dead ends: 51 [2022-02-01 00:19:27,599 INFO L226 Difference]: Without dead ends: 40 [2022-02-01 00:19:27,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-02-01 00:19:27,606 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 37 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-01 00:19:27,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 39 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-01 00:19:27,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-02-01 00:19:27,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-02-01 00:19:27,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 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) [2022-02-01 00:19:27,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2022-02-01 00:19:27,626 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 27 [2022-02-01 00:19:27,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-01 00:19:27,627 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2022-02-01 00:19:27,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-01 00:19:27,628 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2022-02-01 00:19:27,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-01 00:19:27,630 INFO L506 BasicCegarLoop]: Found error trace [2022-02-01 00:19:27,631 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, 1, 1, 1, 1] [2022-02-01 00:19:27,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-01 00:19:27,631 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-01 00:19:27,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-01 00:19:27,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1962849067, now seen corresponding path program 1 times [2022-02-01 00:19:27,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-01 00:19:27,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1126094854] [2022-02-01 00:19:27,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-01 00:19:27,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-01 00:19:27,640 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-01 00:19:27,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-01 00:19:27,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-01 00:19:27,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-01 00:19:27,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-01 00:19:27,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-01 00:19:27,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-01 00:19:27,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-01 00:19:27,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-02-01 00:19:27,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-01 00:19:27,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-01 00:19:27,766 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-01 00:19:27,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1126094854] [2022-02-01 00:19:27,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1126094854] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-01 00:19:27,766 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-01 00:19:27,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-01 00:19:27,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357309821] [2022-02-01 00:19:27,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-01 00:19:27,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-01 00:19:27,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-01 00:19:27,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-01 00:19:27,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-01 00:19:27,768 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-01 00:19:27,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-01 00:19:27,903 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2022-02-01 00:19:27,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-01 00:19:27,903 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-02-01 00:19:27,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-01 00:19:27,905 INFO L225 Difference]: With dead ends: 55 [2022-02-01 00:19:27,905 INFO L226 Difference]: Without dead ends: 44 [2022-02-01 00:19:27,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-02-01 00:19:27,906 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 37 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-01 00:19:27,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 39 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-01 00:19:27,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-02-01 00:19:27,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2022-02-01 00:19:27,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 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) [2022-02-01 00:19:27,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2022-02-01 00:19:27,917 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 30 [2022-02-01 00:19:27,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-01 00:19:27,917 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2022-02-01 00:19:27,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-01 00:19:27,917 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2022-02-01 00:19:27,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-01 00:19:27,918 INFO L506 BasicCegarLoop]: Found error trace [2022-02-01 00:19:27,918 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, 1, 1, 1, 1] [2022-02-01 00:19:27,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-01 00:19:27,919 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-01 00:19:27,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-01 00:19:27,919 INFO L85 PathProgramCache]: Analyzing trace with hash -455297258, now seen corresponding path program 1 times [2022-02-01 00:19:27,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-01 00:19:27,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [635990029] [2022-02-01 00:19:27,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-01 00:19:27,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-01 00:19:27,921 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-01 00:19:27,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-01 00:19:27,979 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-02-01 00:19:27,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-01 00:19:28,027 INFO L133 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2022-02-01 00:19:28,027 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-02-01 00:19:28,029 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-01 00:19:28,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-01 00:19:28,033 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-02-01 00:19:28,034 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-01 00:19:28,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.02 12:19:28 BoogieIcfgContainer [2022-02-01 00:19:28,051 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-01 00:19:28,052 INFO L158 Benchmark]: Toolchain (without parser) took 1987.01ms. Allocated memory was 200.3MB in the beginning and 286.3MB in the end (delta: 86.0MB). Free memory was 145.7MB in the beginning and 162.4MB in the end (delta: -16.7MB). Peak memory consumption was 68.4MB. Max. memory is 8.0GB. [2022-02-01 00:19:28,053 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 200.3MB. Free memory is still 161.7MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-01 00:19:28,055 INFO L158 Benchmark]: CACSL2BoogieTranslator took 214.07ms. Allocated memory was 200.3MB in the beginning and 286.3MB in the end (delta: 86.0MB). Free memory was 145.4MB in the beginning and 257.5MB in the end (delta: -112.1MB). Peak memory consumption was 11.1MB. Max. memory is 8.0GB. [2022-02-01 00:19:28,056 INFO L158 Benchmark]: Boogie Preprocessor took 25.57ms. Allocated memory is still 286.3MB. Free memory was 257.5MB in the beginning and 255.7MB in the end (delta: 1.8MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-01 00:19:28,057 INFO L158 Benchmark]: RCFGBuilder took 287.33ms. Allocated memory is still 286.3MB. Free memory was 255.7MB in the beginning and 242.5MB in the end (delta: 13.1MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2022-02-01 00:19:28,057 INFO L158 Benchmark]: TraceAbstraction took 1452.85ms. Allocated memory is still 286.3MB. Free memory was 242.0MB in the beginning and 162.4MB in the end (delta: 79.7MB). Peak memory consumption was 79.7MB. Max. memory is 8.0GB. [2022-02-01 00:19:28,058 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 200.3MB. Free memory is still 161.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 214.07ms. Allocated memory was 200.3MB in the beginning and 286.3MB in the end (delta: 86.0MB). Free memory was 145.4MB in the beginning and 257.5MB in the end (delta: -112.1MB). Peak memory consumption was 11.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 25.57ms. Allocated memory is still 286.3MB. Free memory was 257.5MB in the beginning and 255.7MB in the end (delta: 1.8MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 287.33ms. Allocated memory is still 286.3MB. Free memory was 255.7MB in the beginning and 242.5MB in the end (delta: 13.1MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * TraceAbstraction took 1452.85ms. Allocated memory is still 286.3MB. Free memory was 242.0MB in the beginning and 162.4MB in the end (delta: 79.7MB). Peak memory consumption was 79.7MB. 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: 74]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 18, overapproximation of someBinaryArithmeticDOUBLEoperation at line 69. Possible FailurePath: [L69] double x = 0.0 / 0.0; [L70] double y = 0.0 / 0.0; [L71] CALL, EXPR fmax_double(x, y) [L57] CALL, EXPR __fpclassify_double(x) [L29] __uint32_t msw, lsw; [L32] ieee_double_shape_type ew_u; [L33] ew_u.value = (x) [L34] EXPR ew_u.parts.msw [L34] (msw) = ew_u.parts.msw [L35] EXPR ew_u.parts.lsw [L35] (lsw) = ew_u.parts.lsw [L38-L39] COND FALSE !((msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000)) [L41-L42] COND FALSE !((msw >= 0x00100000 && msw <= 0x7fefffff) || (msw >= 0x80100000 && msw <= 0xffefffff)) [L44-L45] COND FALSE !(( msw <= 0x000fffff) || (msw >= 0x80000000 && msw <= 0x800fffff)) [L48-L49] COND FALSE !((msw == 0x7ff00000 && lsw == 0x00000000) || (msw == 0xfff00000 && lsw == 0x00000000)) [L52] return 0; [L57] RET, EXPR __fpclassify_double(x) [L57] COND TRUE __fpclassify_double(x) == 0 [L58] return y; [L71] RET, EXPR fmax_double(x, y) [L71] double res = fmax_double(x, y); [L73] CALL, EXPR isnan_double(res) [L18] return x != x; [L73] RET, EXPR isnan_double(res) [L73] COND TRUE !isnan_double(res) [L74] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.4s, OverallIterations: 4, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 119 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 111 mSDsluCounter, 121 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 10 mSDsCounter, 48 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 282 IncrementalHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 48 mSolverCounterUnsat, 111 mSDtfsCounter, 282 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 48 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred 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 [2022-02-01 00:19:28,090 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...