/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/hard-ll_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 23:40:46,645 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 23:40:46,646 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 23:40:46,697 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 23:40:46,697 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 23:40:46,701 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 23:40:46,703 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 23:40:46,708 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 23:40:46,712 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 23:40:46,712 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 23:40:46,713 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 23:40:46,714 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 23:40:46,714 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 23:40:46,715 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 23:40:46,716 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 23:40:46,716 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 23:40:46,717 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 23:40:46,718 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 23:40:46,719 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 23:40:46,720 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 23:40:46,721 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 23:40:46,727 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 23:40:46,730 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 23:40:46,731 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 23:40:46,738 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-31 23:40:46,739 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-31 23:40:46,739 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-31 23:40:46,741 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-31 23:40:46,741 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-31 23:40:46,742 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-31 23:40:46,742 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 23:40:46,743 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 23:40:46,744 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 23:40:46,745 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 23:40:46,746 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 23:40:46,746 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 23:40:46,747 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 23:40:46,747 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 23:40:46,747 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 23:40:46,748 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 23:40:46,749 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 23:40:46,750 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-01-31 23:40:46,763 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 23:40:46,764 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 23:40:46,765 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 23:40:46,765 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 23:40:46,765 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 23:40:46,765 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 23:40:46,766 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 23:40:46,766 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 23:40:46,766 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 23:40:46,766 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 23:40:46,767 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 23:40:46,767 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 23:40:46,767 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 23:40:46,767 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 23:40:46,767 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 23:40:46,767 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 23:40:46,767 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 23:40:46,768 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 23:40:46,768 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 23:40:46,768 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-01-31 23:40:46,768 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 23:40:46,996 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 23:40:47,011 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 23:40:47,013 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 23:40:47,014 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 23:40:47,014 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 23:40:47,015 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound1.c [2022-01-31 23:40:47,064 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd3127283/73d1eae7e223488aba881af976a7db0e/FLAG553a35a5d [2022-01-31 23:40:47,457 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 23:40:47,457 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound1.c [2022-01-31 23:40:47,467 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd3127283/73d1eae7e223488aba881af976a7db0e/FLAG553a35a5d [2022-01-31 23:40:47,861 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd3127283/73d1eae7e223488aba881af976a7db0e [2022-01-31 23:40:47,863 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 23:40:47,864 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 23:40:47,869 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 23:40:47,869 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 23:40:47,872 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 23:40:47,872 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 11:40:47" (1/1) ... [2022-01-31 23:40:47,873 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ef4e97e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:40:47, skipping insertion in model container [2022-01-31 23:40:47,873 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 11:40:47" (1/1) ... [2022-01-31 23:40:47,879 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 23:40:47,890 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 23:40:48,011 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/hard-ll_valuebound1.c[538,551] [2022-01-31 23:40:48,044 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 23:40:48,050 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 23:40:48,059 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/hard-ll_valuebound1.c[538,551] [2022-01-31 23:40:48,065 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 23:40:48,074 INFO L208 MainTranslator]: Completed translation [2022-01-31 23:40:48,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:40:48 WrapperNode [2022-01-31 23:40:48,075 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 23:40:48,075 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 23:40:48,076 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 23:40:48,076 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 23:40:48,085 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:40:48" (1/1) ... [2022-01-31 23:40:48,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:40:48" (1/1) ... [2022-01-31 23:40:48,090 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:40:48" (1/1) ... [2022-01-31 23:40:48,090 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:40:48" (1/1) ... [2022-01-31 23:40:48,094 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:40:48" (1/1) ... [2022-01-31 23:40:48,097 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:40:48" (1/1) ... [2022-01-31 23:40:48,098 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:40:48" (1/1) ... [2022-01-31 23:40:48,099 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 23:40:48,100 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 23:40:48,100 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 23:40:48,100 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 23:40:48,101 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:40:48" (1/1) ... [2022-01-31 23:40:48,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 23:40:48,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 23:40:48,144 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 23:40:48,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 23:40:48,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 23:40:48,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 23:40:48,184 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 23:40:48,184 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 23:40:48,184 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 23:40:48,184 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 23:40:48,184 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 23:40:48,185 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 23:40:48,185 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 23:40:48,185 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 23:40:48,185 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-01-31 23:40:48,185 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 23:40:48,186 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 23:40:48,186 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 23:40:48,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 23:40:48,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 23:40:48,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 23:40:48,188 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 23:40:48,190 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 23:40:48,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 23:40:48,239 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 23:40:48,240 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 23:40:48,389 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 23:40:48,410 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 23:40:48,410 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 23:40:48,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 11:40:48 BoogieIcfgContainer [2022-01-31 23:40:48,412 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 23:40:48,413 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 23:40:48,413 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 23:40:48,416 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 23:40:48,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 11:40:47" (1/3) ... [2022-01-31 23:40:48,417 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6298826 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 11:40:48, skipping insertion in model container [2022-01-31 23:40:48,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:40:48" (2/3) ... [2022-01-31 23:40:48,417 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6298826 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 11:40:48, skipping insertion in model container [2022-01-31 23:40:48,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 11:40:48" (3/3) ... [2022-01-31 23:40:48,418 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound1.c [2022-01-31 23:40:48,431 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 23:40:48,431 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 23:40:48,489 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 23:40:48,500 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 [2022-01-31 23:40:48,500 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 23:40:48,514 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-01-31 23:40:48,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 23:40:48,527 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:40:48,528 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:40:48,528 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:40:48,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:40:48,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1784424332, now seen corresponding path program 1 times [2022-01-31 23:40:48,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:40:48,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1782180213] [2022-01-31 23:40:48,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:40:48,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:40:48,599 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:40:48,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:40:48,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:40:48,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:40:48,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:40:48,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:40:48,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:40:48,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:40:48,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 23:40:48,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:40:48,774 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 23:40:48,775 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:40:48,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1782180213] [2022-01-31 23:40:48,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1782180213] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:40:48,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:40:48,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 23:40:48,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233611920] [2022-01-31 23:40:48,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:40:48,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 23:40:48,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:40:48,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 23:40:48,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 23:40:48,812 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 23:40:48,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:40:48,912 INFO L93 Difference]: Finished difference Result 69 states and 110 transitions. [2022-01-31 23:40:48,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 23:40:48,917 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-01-31 23:40:48,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:40:48,929 INFO L225 Difference]: With dead ends: 69 [2022-01-31 23:40:48,930 INFO L226 Difference]: Without dead ends: 33 [2022-01-31 23:40:48,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 23:40:48,940 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:40:48,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:40:48,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-31 23:40:48,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-01-31 23:40:48,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 23:40:48,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-01-31 23:40:48,988 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2022-01-31 23:40:48,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:40:48,988 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-01-31 23:40:48,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 23:40:48,989 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-01-31 23:40:48,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 23:40:48,990 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:40:48,991 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:40:48,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 23:40:48,991 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:40:48,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:40:48,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1361835634, now seen corresponding path program 1 times [2022-01-31 23:40:48,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:40:48,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [923740741] [2022-01-31 23:40:48,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:40:48,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:40:48,998 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:40:49,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:40:49,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:40:49,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:40:49,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:40:49,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:40:49,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:40:49,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:40:49,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 23:40:49,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:40:49,099 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 23:40:49,099 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:40:49,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [923740741] [2022-01-31 23:40:49,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [923740741] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:40:49,100 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:40:49,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 23:40:49,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291505075] [2022-01-31 23:40:49,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:40:49,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 23:40:49,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:40:49,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 23:40:49,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 23:40:49,102 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-31 23:40:49,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:40:49,257 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2022-01-31 23:40:49,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 23:40:49,257 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-01-31 23:40:49,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:40:49,258 INFO L225 Difference]: With dead ends: 46 [2022-01-31 23:40:49,259 INFO L226 Difference]: Without dead ends: 44 [2022-01-31 23:40:49,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-01-31 23:40:49,260 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 38 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:40:49,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 48 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:40:49,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-01-31 23:40:49,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-01-31 23:40:49,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 23:40:49,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-01-31 23:40:49,272 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2022-01-31 23:40:49,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:40:49,272 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-01-31 23:40:49,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-31 23:40:49,273 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-01-31 23:40:49,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 23:40:49,274 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:40:49,274 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:40:49,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 23:40:49,274 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:40:49,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:40:49,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1382067636, now seen corresponding path program 1 times [2022-01-31 23:40:49,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:40:49,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [588330888] [2022-01-31 23:40:49,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:40:49,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:40:49,277 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:40:49,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:40:49,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:40:49,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:40:49,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:40:49,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:40:49,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:40:49,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:40:49,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 23:40:49,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:40:49,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-31 23:40:49,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:40:49,370 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 23:40:49,370 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:40:49,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [588330888] [2022-01-31 23:40:49,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [588330888] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:40:49,370 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:40:49,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 23:40:49,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527894681] [2022-01-31 23:40:49,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:40:49,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 23:40:49,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:40:49,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 23:40:49,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 23:40:49,372 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 23:40:49,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:40:49,542 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2022-01-31 23:40:49,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 23:40:49,543 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-01-31 23:40:49,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:40:49,544 INFO L225 Difference]: With dead ends: 50 [2022-01-31 23:40:49,544 INFO L226 Difference]: Without dead ends: 48 [2022-01-31 23:40:49,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-01-31 23:40:49,546 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:40:49,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 48 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:40:49,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-01-31 23:40:49,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2022-01-31 23:40:49,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 23:40:49,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-01-31 23:40:49,556 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2022-01-31 23:40:49,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:40:49,556 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-01-31 23:40:49,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 23:40:49,556 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-01-31 23:40:49,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 23:40:49,557 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:40:49,557 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:40:49,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 23:40:49,558 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:40:49,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:40:49,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1455208590, now seen corresponding path program 1 times [2022-01-31 23:40:49,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:40:49,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1504956381] [2022-01-31 23:40:49,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:40:49,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:40:49,560 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:40:49,573 WARN L127 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2022-01-31 23:40:49,573 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2022-01-31 23:40:49,578 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-31 23:40:49,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 23:40:49,582 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-01-31 23:40:49,584 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-31 23:40:49,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 11:40:49 BoogieIcfgContainer [2022-01-31 23:40:49,592 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-31 23:40:49,593 INFO L158 Benchmark]: Toolchain (without parser) took 1728.87ms. Allocated memory was 184.5MB in the beginning and 255.9MB in the end (delta: 71.3MB). Free memory was 131.8MB in the beginning and 146.4MB in the end (delta: -14.7MB). Peak memory consumption was 56.5MB. Max. memory is 8.0GB. [2022-01-31 23:40:49,593 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 184.5MB. Free memory is still 148.0MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 23:40:49,594 INFO L158 Benchmark]: CACSL2BoogieTranslator took 206.03ms. Allocated memory was 184.5MB in the beginning and 255.9MB in the end (delta: 71.3MB). Free memory was 131.6MB in the beginning and 228.2MB in the end (delta: -96.6MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2022-01-31 23:40:49,594 INFO L158 Benchmark]: Boogie Preprocessor took 23.69ms. Allocated memory is still 255.9MB. Free memory was 228.2MB in the beginning and 226.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-01-31 23:40:49,595 INFO L158 Benchmark]: RCFGBuilder took 312.34ms. Allocated memory is still 255.9MB. Free memory was 226.7MB in the beginning and 216.2MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-01-31 23:40:49,595 INFO L158 Benchmark]: TraceAbstraction took 1179.30ms. Allocated memory is still 255.9MB. Free memory was 215.6MB in the beginning and 146.4MB in the end (delta: 69.2MB). Peak memory consumption was 69.2MB. Max. memory is 8.0GB. [2022-01-31 23:40:49,596 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 184.5MB. Free memory is still 148.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 206.03ms. Allocated memory was 184.5MB in the beginning and 255.9MB in the end (delta: 71.3MB). Free memory was 131.6MB in the beginning and 228.2MB in the end (delta: -96.6MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * Boogie Preprocessor took 23.69ms. Allocated memory is still 255.9MB. Free memory was 228.2MB in the beginning and 226.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 312.34ms. Allocated memory is still 255.9MB. Free memory was 226.7MB in the beginning and 216.2MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 1179.30ms. Allocated memory is still 255.9MB. Free memory was 215.6MB in the beginning and 146.4MB in the end (delta: 69.2MB). Peak memory consumption was 69.2MB. 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: 17]: 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: [L23] unsigned int A, B; [L24] long long r, d, p, q; [L25] A = __VERIFIER_nondet_uint() [L26] CALL assume_abort_if_not(A>=0 && A<=1) [L12] COND FALSE !(!cond) [L26] RET assume_abort_if_not(A>=0 && A<=1) [L27] B = __VERIFIER_nondet_uint() [L28] CALL assume_abort_if_not(B>=0 && B<=1) [L12] COND FALSE !(!cond) [L28] RET assume_abort_if_not(B>=0 && B<=1) [L29] CALL assume_abort_if_not(B >= 1) [L12] COND FALSE !(!cond) [L29] RET assume_abort_if_not(B >= 1) [L31] r = A [L32] d = B [L33] p = 1 [L34] q = 0 [L36] COND TRUE 1 [L37] CALL __VERIFIER_assert(q == 0) [L15] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(q == 0) [L38] CALL __VERIFIER_assert(r == A) [L15] COND FALSE !(!(cond)) [L38] RET __VERIFIER_assert(r == A) [L39] CALL __VERIFIER_assert(d == B * p) [L15] COND TRUE !(cond) [L17] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.1s, OverallIterations: 4, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 114 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 92 mSDsluCounter, 137 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 37 mSDsCounter, 68 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 270 IncrementalHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 68 mSolverCounterUnsat, 100 mSDtfsCounter, 270 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=3, InterpolantAutomatonStates: 17, 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, 3 MinimizatonAttempts, 14 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-01-31 23:40:49,626 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...