/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/nla-digbench-scaling/sqrt1-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-24 04:14:48,896 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-24 04:14:48,909 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-24 04:14:48,948 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-24 04:14:48,949 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-24 04:14:48,949 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-24 04:14:48,950 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-24 04:14:48,957 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-24 04:14:48,958 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-24 04:14:48,963 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-24 04:14:48,963 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-24 04:14:48,964 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-24 04:14:48,964 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-24 04:14:48,966 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-24 04:14:48,967 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-24 04:14:48,969 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-24 04:14:48,969 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-24 04:14:48,970 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-24 04:14:48,973 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-24 04:14:48,974 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-24 04:14:48,975 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-24 04:14:48,978 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-24 04:14:48,979 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-24 04:14:48,979 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-24 04:14:48,981 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-02-24 04:14:48,981 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-02-24 04:14:48,981 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-02-24 04:14:48,982 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-02-24 04:14:48,982 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-02-24 04:14:48,982 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-02-24 04:14:48,982 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-24 04:14:48,986 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-24 04:14:48,988 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-24 04:14:48,988 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-24 04:14:48,988 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-24 04:14:48,989 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-24 04:14:48,989 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-24 04:14:48,989 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-24 04:14:48,989 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-24 04:14:48,990 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-24 04:14:48,990 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-24 04:14:48,991 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-02-24 04:14:48,998 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-24 04:14:48,998 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-24 04:14:48,999 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-24 04:14:48,999 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-24 04:14:48,999 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-24 04:14:48,999 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-24 04:14:48,999 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-24 04:14:49,000 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-24 04:14:49,000 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-24 04:14:49,000 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-24 04:14:49,000 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-24 04:14:49,000 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-24 04:14:49,000 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-24 04:14:49,000 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-24 04:14:49,000 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-24 04:14:49,000 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 04:14:49,000 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-24 04:14:49,000 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-24 04:14:49,000 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-24 04:14:49,001 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-24 04:14:49,001 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-24 04:14:49,167 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-24 04:14:49,181 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-24 04:14:49,183 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-24 04:14:49,183 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-24 04:14:49,185 INFO L275 PluginConnector]: CDTParser initialized [2022-02-24 04:14:49,186 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound100.c [2022-02-24 04:14:49,228 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80bd56afb/83c2c742fe7f408c9b8d1305d10f3c92/FLAGcb3dbabf2 [2022-02-24 04:14:49,567 INFO L306 CDTParser]: Found 1 translation units. [2022-02-24 04:14:49,567 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound100.c [2022-02-24 04:14:49,571 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80bd56afb/83c2c742fe7f408c9b8d1305d10f3c92/FLAGcb3dbabf2 [2022-02-24 04:14:49,582 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80bd56afb/83c2c742fe7f408c9b8d1305d10f3c92 [2022-02-24 04:14:49,584 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-24 04:14:49,585 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-24 04:14:49,586 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-24 04:14:49,586 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-24 04:14:49,589 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-24 04:14:49,589 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:14:49" (1/1) ... [2022-02-24 04:14:49,590 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50119a55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:49, skipping insertion in model container [2022-02-24 04:14:49,590 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:14:49" (1/1) ... [2022-02-24 04:14:49,594 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-24 04:14:49,607 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-24 04:14:49,746 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound100.c[520,533] [2022-02-24 04:14:49,755 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 04:14:49,760 INFO L203 MainTranslator]: Completed pre-run [2022-02-24 04:14:49,770 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound100.c[520,533] [2022-02-24 04:14:49,774 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 04:14:49,782 INFO L208 MainTranslator]: Completed translation [2022-02-24 04:14:49,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:49 WrapperNode [2022-02-24 04:14:49,782 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-24 04:14:49,783 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-24 04:14:49,783 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-24 04:14:49,783 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-24 04:14:49,789 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:49" (1/1) ... [2022-02-24 04:14:49,789 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:49" (1/1) ... [2022-02-24 04:14:49,793 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:49" (1/1) ... [2022-02-24 04:14:49,793 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:49" (1/1) ... [2022-02-24 04:14:49,795 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:49" (1/1) ... [2022-02-24 04:14:49,797 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:49" (1/1) ... [2022-02-24 04:14:49,799 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:49" (1/1) ... [2022-02-24 04:14:49,799 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-24 04:14:49,800 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-24 04:14:49,800 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-24 04:14:49,800 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-24 04:14:49,801 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:49" (1/1) ... [2022-02-24 04:14:49,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 04:14:49,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 04:14:49,833 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) [2022-02-24 04:14:49,837 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 [2022-02-24 04:14:49,859 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-24 04:14:49,859 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-24 04:14:49,859 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-24 04:14:49,859 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-24 04:14:49,859 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-24 04:14:49,859 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-24 04:14:49,859 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-24 04:14:49,859 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-24 04:14:49,860 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-24 04:14:49,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-24 04:14:49,860 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-24 04:14:49,860 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-24 04:14:49,860 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-24 04:14:49,861 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-24 04:14:49,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-24 04:14:49,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-24 04:14:49,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-24 04:14:49,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-24 04:14:49,863 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-24 04:14:49,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-24 04:14:49,908 INFO L234 CfgBuilder]: Building ICFG [2022-02-24 04:14:49,909 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-24 04:14:49,971 INFO L275 CfgBuilder]: Performing block encoding [2022-02-24 04:14:49,975 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-24 04:14:49,975 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-24 04:14:49,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:14:49 BoogieIcfgContainer [2022-02-24 04:14:49,976 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-24 04:14:49,977 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-24 04:14:49,977 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-24 04:14:49,985 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-24 04:14:49,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 04:14:49" (1/3) ... [2022-02-24 04:14:49,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e394e39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:14:49, skipping insertion in model container [2022-02-24 04:14:49,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:49" (2/3) ... [2022-02-24 04:14:49,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e394e39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:14:49, skipping insertion in model container [2022-02-24 04:14:49,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:14:49" (3/3) ... [2022-02-24 04:14:49,988 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_valuebound100.c [2022-02-24 04:14:49,991 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-24 04:14:49,991 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-24 04:14:50,022 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-24 04:14:50,031 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 [2022-02-24 04:14:50,031 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-24 04:14:50,040 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-24 04:14:50,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-24 04:14:50,045 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:14:50,047 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:14:50,047 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:14:50,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:14:50,052 INFO L85 PathProgramCache]: Analyzing trace with hash 326851384, now seen corresponding path program 1 times [2022-02-24 04:14:50,058 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:14:50,058 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1322082772] [2022-02-24 04:14:50,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:14:50,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:14:50,096 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:14:50,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:50,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:14:50,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:50,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:14:50,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:50,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:14:50,174 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:14:50,174 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1322082772] [2022-02-24 04:14:50,175 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1322082772] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:14:50,175 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:14:50,176 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-24 04:14:50,176 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812360605] [2022-02-24 04:14:50,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:14:50,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-24 04:14:50,180 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:14:50,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-24 04:14:50,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-24 04:14:50,202 INFO L87 Difference]: Start difference. First operand has 31 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-24 04:14:50,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:14:50,296 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2022-02-24 04:14:50,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-24 04:14:50,299 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-02-24 04:14:50,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:14:50,303 INFO L225 Difference]: With dead ends: 53 [2022-02-24 04:14:50,304 INFO L226 Difference]: Without dead ends: 26 [2022-02-24 04:14:50,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-24 04:14:50,309 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:14:50,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 32 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:14:50,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-02-24 04:14:50,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-02-24 04:14:50,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-24 04:14:50,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-02-24 04:14:50,353 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 17 [2022-02-24 04:14:50,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:14:50,354 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-02-24 04:14:50,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-24 04:14:50,355 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-02-24 04:14:50,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-24 04:14:50,356 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:14:50,356 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:14:50,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-24 04:14:50,357 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:14:50,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:14:50,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1008578050, now seen corresponding path program 1 times [2022-02-24 04:14:50,359 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:14:50,359 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [14859933] [2022-02-24 04:14:50,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:14:50,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:14:50,369 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:14:50,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:50,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:14:50,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:50,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:14:50,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:50,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:14:50,508 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:14:50,509 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [14859933] [2022-02-24 04:14:50,509 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [14859933] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:14:50,509 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:14:50,509 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 04:14:50,510 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680146334] [2022-02-24 04:14:50,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:14:50,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 04:14:50,511 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:14:50,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 04:14:50,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-24 04:14:50,512 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-24 04:14:50,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:14:50,687 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2022-02-24 04:14:50,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 04:14:50,688 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-02-24 04:14:50,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:14:50,690 INFO L225 Difference]: With dead ends: 40 [2022-02-24 04:14:50,691 INFO L226 Difference]: Without dead ends: 38 [2022-02-24 04:14:50,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-24 04:14:50,696 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 25 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:14:50,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 39 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:14:50,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-02-24 04:14:50,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2022-02-24 04:14:50,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-24 04:14:50,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2022-02-24 04:14:50,719 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 17 [2022-02-24 04:14:50,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:14:50,720 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2022-02-24 04:14:50,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-24 04:14:50,720 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2022-02-24 04:14:50,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-24 04:14:50,720 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:14:50,721 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:14:50,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-24 04:14:50,721 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:14:50,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:14:50,721 INFO L85 PathProgramCache]: Analyzing trace with hash -789682422, now seen corresponding path program 1 times [2022-02-24 04:14:50,721 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:14:50,722 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [380935203] [2022-02-24 04:14:50,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:14:50,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:14:50,723 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:14:50,730 WARN L132 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2022-02-24 04:14:50,731 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2022-02-24 04:14:50,737 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-24 04:14:50,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-24 04:14:50,741 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-02-24 04:14:50,742 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-24 04:14:50,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 04:14:50 BoogieIcfgContainer [2022-02-24 04:14:50,756 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-24 04:14:50,756 INFO L158 Benchmark]: Toolchain (without parser) took 1170.99ms. Allocated memory was 194.0MB in the beginning and 233.8MB in the end (delta: 39.8MB). Free memory was 144.2MB in the beginning and 200.9MB in the end (delta: -56.7MB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-24 04:14:50,757 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 194.0MB. Free memory is still 160.3MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-24 04:14:50,757 INFO L158 Benchmark]: CACSL2BoogieTranslator took 196.16ms. Allocated memory is still 194.0MB. Free memory was 144.0MB in the beginning and 168.7MB in the end (delta: -24.7MB). Peak memory consumption was 7.9MB. Max. memory is 8.0GB. [2022-02-24 04:14:50,757 INFO L158 Benchmark]: Boogie Preprocessor took 16.84ms. Allocated memory is still 194.0MB. Free memory was 168.7MB in the beginning and 166.9MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-24 04:14:50,761 INFO L158 Benchmark]: RCFGBuilder took 176.22ms. Allocated memory is still 194.0MB. Free memory was 166.9MB in the beginning and 157.2MB in the end (delta: 9.8MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-02-24 04:14:50,761 INFO L158 Benchmark]: TraceAbstraction took 778.48ms. Allocated memory was 194.0MB in the beginning and 233.8MB in the end (delta: 39.8MB). Free memory was 156.8MB in the beginning and 200.9MB in the end (delta: -44.1MB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-24 04:14:50,763 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 194.0MB. Free memory is still 160.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 196.16ms. Allocated memory is still 194.0MB. Free memory was 144.0MB in the beginning and 168.7MB in the end (delta: -24.7MB). Peak memory consumption was 7.9MB. Max. memory is 8.0GB. * Boogie Preprocessor took 16.84ms. Allocated memory is still 194.0MB. Free memory was 168.7MB in the beginning and 166.9MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 176.22ms. Allocated memory is still 194.0MB. Free memory was 166.9MB in the beginning and 157.2MB in the end (delta: 9.8MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 778.48ms. Allocated memory was 194.0MB in the beginning and 233.8MB in the end (delta: 39.8MB). Free memory was 156.8MB in the beginning and 200.9MB in the end (delta: -44.1MB). There was no memory consumed. 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: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L21] int n; [L22] long long a, s, t; [L23] n = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(n>=0 && n<=100) [L9] COND FALSE !(!cond) [L24] RET assume_abort_if_not(n>=0 && n<=100) [L26] a = 0 [L27] s = 1 [L28] t = 1 [L30] COND TRUE 1 [L31] CALL __VERIFIER_assert(t == 2*a + 1) [L12] COND FALSE !(!(cond)) [L31] RET __VERIFIER_assert(t == 2*a + 1) [L32] CALL __VERIFIER_assert(s == (a + 1) * (a + 1)) [L12] COND TRUE !(cond) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.7s, OverallIterations: 3, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 53 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 40 mSDsluCounter, 71 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 20 mSDsCounter, 35 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 109 IncrementalHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 35 mSolverCounterUnsat, 51 mSDtfsCounter, 109 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=2, InterpolantAutomatonStates: 10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 2 MinimizatonAttempts, 2 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 [2022-02-24 04:14:50,786 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...