/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/loop-lit/cggmp2005_variant.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 09:44:11,868 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 09:44:11,870 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 09:44:11,890 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 09:44:11,910 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 09:44:11,910 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 09:44:11,911 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 09:44:11,911 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-06 09:44:11,931 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 09:44:11,931 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 09:44:11,931 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-06 09:44:11,932 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-06 09:44:11,932 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-06 09:44:11,932 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-06 09:44:11,932 INFO L138 SettingsManager]: * Use SBE=true [2022-04-06 09:44:11,932 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 09:44:11,932 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 09:44:11,933 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 09:44:11,933 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 09:44:11,933 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 09:44:11,933 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 09:44:11,933 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 09:44:11,933 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 09:44:11,933 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 09:44:11,933 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 09:44:11,934 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 09:44:11,934 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 09:44:11,934 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 09:44:11,934 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 09:44:11,934 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-06 09:44:11,934 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-06 09:44:11,934 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 09:44:11,934 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-06 09:44:11,935 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 09:44:11,935 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-06 09:44:11,935 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-06 09:44:11,935 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 09:44:11,935 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 09:44:12,137 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 09:44:12,159 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 09:44:12,162 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 09:44:12,162 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 09:44:12,163 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 09:44:12,165 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/cggmp2005_variant.i [2022-04-06 09:44:12,215 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54dc854e9/9357777e7ad742e6bd8508f497d60196/FLAG1284eb954 [2022-04-06 09:44:12,571 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 09:44:12,571 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/cggmp2005_variant.i [2022-04-06 09:44:12,577 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54dc854e9/9357777e7ad742e6bd8508f497d60196/FLAG1284eb954 [2022-04-06 09:44:12,585 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54dc854e9/9357777e7ad742e6bd8508f497d60196 [2022-04-06 09:44:12,587 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 09:44:12,588 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 09:44:12,590 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 09:44:12,591 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 09:44:12,592 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 09:44:12,593 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 09:44:12" (1/1) ... [2022-04-06 09:44:12,593 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46171078 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:44:12, skipping insertion in model container [2022-04-06 09:44:12,594 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 09:44:12" (1/1) ... [2022-04-06 09:44:12,598 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 09:44:12,606 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 09:44:12,715 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/cggmp2005_variant.i[895,908] [2022-04-06 09:44:12,734 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 09:44:12,740 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 09:44:12,750 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/cggmp2005_variant.i[895,908] [2022-04-06 09:44:12,753 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 09:44:12,761 INFO L208 MainTranslator]: Completed translation [2022-04-06 09:44:12,761 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:44:12 WrapperNode [2022-04-06 09:44:12,761 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 09:44:12,762 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 09:44:12,762 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 09:44:12,762 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 09:44:12,769 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:44:12" (1/1) ... [2022-04-06 09:44:12,769 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:44:12" (1/1) ... [2022-04-06 09:44:12,773 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:44:12" (1/1) ... [2022-04-06 09:44:12,773 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:44:12" (1/1) ... [2022-04-06 09:44:12,781 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:44:12" (1/1) ... [2022-04-06 09:44:12,784 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:44:12" (1/1) ... [2022-04-06 09:44:12,785 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:44:12" (1/1) ... [2022-04-06 09:44:12,786 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 09:44:12,786 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 09:44:12,786 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 09:44:12,786 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 09:44:12,787 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:44:12" (1/1) ... [2022-04-06 09:44:12,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 09:44:12,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:44:12,807 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) [2022-04-06 09:44:12,812 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 [2022-04-06 09:44:12,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 09:44:12,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 09:44:12,834 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 09:44:12,834 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 09:44:12,834 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 09:44:12,834 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 09:44:12,834 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 09:44:12,835 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 09:44:12,835 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-04-06 09:44:12,836 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-04-06 09:44:12,836 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 09:44:12,836 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 09:44:12,836 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 09:44:12,836 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 09:44:12,836 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 09:44:12,836 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 09:44:12,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 09:44:12,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 09:44:12,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 09:44:12,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 09:44:12,836 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 09:44:12,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 09:44:12,890 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 09:44:12,891 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 09:44:12,998 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 09:44:13,003 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 09:44:13,003 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 09:44:13,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 09:44:13 BoogieIcfgContainer [2022-04-06 09:44:13,005 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 09:44:13,006 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 09:44:13,006 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 09:44:13,007 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 09:44:13,009 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 09:44:13" (1/1) ... [2022-04-06 09:44:13,011 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-06 09:44:13,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 09:44:13 BasicIcfg [2022-04-06 09:44:13,022 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 09:44:13,023 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 09:44:13,023 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 09:44:13,025 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 09:44:13,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 09:44:12" (1/4) ... [2022-04-06 09:44:13,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5224f02e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 09:44:13, skipping insertion in model container [2022-04-06 09:44:13,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:44:12" (2/4) ... [2022-04-06 09:44:13,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5224f02e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 09:44:13, skipping insertion in model container [2022-04-06 09:44:13,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 09:44:13" (3/4) ... [2022-04-06 09:44:13,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5224f02e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 09:44:13, skipping insertion in model container [2022-04-06 09:44:13,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 09:44:13" (4/4) ... [2022-04-06 09:44:13,044 INFO L111 eAbstractionObserver]: Analyzing ICFG cggmp2005_variant.iqvasr [2022-04-06 09:44:13,048 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-06 09:44:13,049 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 09:44:13,116 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 09:44:13,123 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 09:44:13,124 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 09:44:13,145 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 09:44:13,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-06 09:44:13,157 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:44:13,157 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:44:13,158 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:44:13,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:44:13,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1291699483, now seen corresponding path program 1 times [2022-04-06 09:44:13,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:44:13,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991703998] [2022-04-06 09:44:13,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:44:13,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:44:13,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:13,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:44:13,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:13,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:44:13,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:44:13,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991703998] [2022-04-06 09:44:13,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991703998] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 09:44:13,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 09:44:13,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 09:44:13,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480233649] [2022-04-06 09:44:13,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 09:44:13,364 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 09:44:13,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:44:13,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 09:44:13,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 09:44:13,395 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:44:13,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:44:13,438 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-04-06 09:44:13,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 09:44:13,441 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-06 09:44:13,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:44:13,453 INFO L225 Difference]: With dead ends: 32 [2022-04-06 09:44:13,453 INFO L226 Difference]: Without dead ends: 13 [2022-04-06 09:44:13,456 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 09:44:13,460 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 09:44:13,461 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 23 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 09:44:13,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-04-06 09:44:13,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-04-06 09:44:13,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:44:13,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2022-04-06 09:44:13,496 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 12 [2022-04-06 09:44:13,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:44:13,497 INFO L478 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2022-04-06 09:44:13,497 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:44:13,497 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2022-04-06 09:44:13,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-06 09:44:13,498 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:44:13,498 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:44:13,499 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 09:44:13,499 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:44:13,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:44:13,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1292623004, now seen corresponding path program 1 times [2022-04-06 09:44:13,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:44:13,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855577368] [2022-04-06 09:44:13,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:44:13,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:44:13,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:13,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:44:13,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:13,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:44:13,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:44:13,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855577368] [2022-04-06 09:44:13,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855577368] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 09:44:13,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 09:44:13,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 09:44:13,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984226038] [2022-04-06 09:44:13,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 09:44:13,594 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 09:44:13,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:44:13,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 09:44:13,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 09:44:13,597 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:44:13,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:44:13,635 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2022-04-06 09:44:13,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 09:44:13,636 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-06 09:44:13,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:44:13,637 INFO L225 Difference]: With dead ends: 19 [2022-04-06 09:44:13,637 INFO L226 Difference]: Without dead ends: 14 [2022-04-06 09:44:13,641 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 09:44:13,643 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 09:44:13,645 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 19 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 09:44:13,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-04-06 09:44:13,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-04-06 09:44:13,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:44:13,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2022-04-06 09:44:13,656 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2022-04-06 09:44:13,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:44:13,656 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2022-04-06 09:44:13,656 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:44:13,656 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2022-04-06 09:44:13,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-04-06 09:44:13,657 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:44:13,657 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:44:13,657 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 09:44:13,657 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:44:13,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:44:13,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1443329038, now seen corresponding path program 1 times [2022-04-06 09:44:13,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:44:13,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561009093] [2022-04-06 09:44:13,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:44:13,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:44:13,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:13,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:44:13,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:13,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:44:13,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:44:13,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561009093] [2022-04-06 09:44:13,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561009093] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:44:13,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451943260] [2022-04-06 09:44:13,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:44:13,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:44:13,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:44:13,876 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:44:13,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 09:44:13,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:13,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 09:44:13,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:44:14,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:44:14,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:44:14,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:44:14,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451943260] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:44:14,371 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:44:14,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-04-06 09:44:14,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208778142] [2022-04-06 09:44:14,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:44:14,376 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 09:44:14,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:44:14,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 09:44:14,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-04-06 09:44:14,379 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 16 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 13 states have internal predecessors, (18), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:44:14,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:44:14,524 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2022-04-06 09:44:14,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 09:44:14,525 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 13 states have internal predecessors, (18), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-04-06 09:44:14,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:44:14,526 INFO L225 Difference]: With dead ends: 20 [2022-04-06 09:44:14,526 INFO L226 Difference]: Without dead ends: 15 [2022-04-06 09:44:14,526 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2022-04-06 09:44:14,527 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 14 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 09:44:14,527 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 47 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 09:44:14,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-04-06 09:44:14,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-04-06 09:44:14,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:44:14,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-04-06 09:44:14,531 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2022-04-06 09:44:14,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:44:14,531 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-04-06 09:44:14,531 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 13 states have internal predecessors, (18), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:44:14,531 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-04-06 09:44:14,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-04-06 09:44:14,532 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:44:14,532 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:44:14,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 09:44:14,753 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:44:14,754 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:44:14,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:44:14,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1820248796, now seen corresponding path program 2 times [2022-04-06 09:44:14,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:44:14,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588190405] [2022-04-06 09:44:14,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:44:14,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:44:14,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:14,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:44:14,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:14,859 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:44:14,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:44:14,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588190405] [2022-04-06 09:44:14,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588190405] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:44:14,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958871074] [2022-04-06 09:44:14,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 09:44:14,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:44:14,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:44:14,861 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:44:14,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 09:44:14,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 09:44:14,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:44:14,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 09:44:14,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:44:15,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:44:15,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:44:15,236 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:44:15,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958871074] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:44:15,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:44:15,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-04-06 09:44:15,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053739750] [2022-04-06 09:44:15,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:44:15,238 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 09:44:15,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:44:15,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 09:44:15,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-04-06 09:44:15,239 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 18 states, 16 states have (on average 1.25) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:44:15,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:44:15,446 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2022-04-06 09:44:15,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 09:44:15,446 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.25) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-04-06 09:44:15,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:44:15,447 INFO L225 Difference]: With dead ends: 17 [2022-04-06 09:44:15,447 INFO L226 Difference]: Without dead ends: 0 [2022-04-06 09:44:15,447 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2022-04-06 09:44:15,448 INFO L913 BasicCegarLoop]: 8 mSDtfsCounter, 17 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 09:44:15,448 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 45 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 09:44:15,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-06 09:44:15,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-06 09:44:15,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-06 09:44:15,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-06 09:44:15,449 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2022-04-06 09:44:15,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:44:15,449 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-06 09:44:15,449 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.25) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:44:15,449 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-06 09:44:15,450 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-06 09:44:15,452 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 09:44:15,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 09:44:15,673 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-04-06 09:44:15,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-06 09:44:15,747 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-04-06 09:44:15,747 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-04-06 09:44:15,748 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-04-06 09:44:15,748 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-04-06 09:44:15,748 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-04-06 09:44:15,748 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-04-06 09:44:15,748 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-04-06 09:44:15,748 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 24 37) the Hoare annotation is: true [2022-04-06 09:44:15,748 INFO L882 garLoopResultBuilder]: For program point L28(line 28) no Hoare annotation was computed. [2022-04-06 09:44:15,748 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 24 37) no Hoare annotation was computed. [2022-04-06 09:44:15,748 INFO L878 garLoopResultBuilder]: At program point L30-2(lines 30 34) the Hoare annotation is: (let ((.cse0 (+ main_~lo~0 (* main_~mid~0 2)))) (and (<= main_~hi~0 .cse0) (<= main_~lo~0 main_~hi~0) (<= .cse0 main_~hi~0))) [2022-04-06 09:44:15,748 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 24 37) no Hoare annotation was computed. [2022-04-06 09:44:15,749 INFO L878 garLoopResultBuilder]: At program point L30-3(lines 30 34) the Hoare annotation is: (or (let ((.cse0 (+ main_~lo~0 (* main_~mid~0 2)))) (and (<= main_~hi~0 .cse0) (<= main_~lo~0 main_~hi~0) (< main_~hi~0 (+ main_~lo~0 1)) (<= .cse0 main_~hi~0))) (let ((.cse1 (div (+ (- 1) (* (- 1) main_~hi~0)) (- 2)))) (and (< 0 .cse1) (= (mod (+ main_~hi~0 1) 2) 0) (<= .cse1 1) (<= .cse1 (+ main_~mid~0 1)) (= main_~lo~0 1)))) [2022-04-06 09:44:15,749 INFO L882 garLoopResultBuilder]: For program point L35(line 35) no Hoare annotation was computed. [2022-04-06 09:44:15,749 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2022-04-06 09:44:15,749 INFO L882 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2022-04-06 09:44:15,749 INFO L882 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2022-04-06 09:44:15,749 INFO L882 garLoopResultBuilder]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2022-04-06 09:44:15,749 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2022-04-06 09:44:15,749 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2022-04-06 09:44:15,752 INFO L719 BasicCegarLoop]: Path program histogram: [2, 1, 1] [2022-04-06 09:44:15,753 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 09:44:15,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 09:44:15 BasicIcfg [2022-04-06 09:44:15,766 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 09:44:15,766 INFO L158 Benchmark]: Toolchain (without parser) took 3178.40ms. Allocated memory was 211.8MB in the beginning and 275.8MB in the end (delta: 64.0MB). Free memory was 160.3MB in the beginning and 167.9MB in the end (delta: -7.7MB). Peak memory consumption was 55.7MB. Max. memory is 8.0GB. [2022-04-06 09:44:15,766 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 211.8MB. Free memory is still 177.0MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 09:44:15,767 INFO L158 Benchmark]: CACSL2BoogieTranslator took 171.18ms. Allocated memory is still 211.8MB. Free memory was 160.1MB in the beginning and 188.2MB in the end (delta: -28.1MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-04-06 09:44:15,767 INFO L158 Benchmark]: Boogie Preprocessor took 23.45ms. Allocated memory is still 211.8MB. Free memory was 188.2MB in the beginning and 186.6MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-06 09:44:15,767 INFO L158 Benchmark]: RCFGBuilder took 218.70ms. Allocated memory is still 211.8MB. Free memory was 186.6MB in the beginning and 176.7MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-04-06 09:44:15,767 INFO L158 Benchmark]: IcfgTransformer took 16.07ms. Allocated memory is still 211.8MB. Free memory was 176.7MB in the beginning and 175.6MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-06 09:44:15,767 INFO L158 Benchmark]: TraceAbstraction took 2743.06ms. Allocated memory was 211.8MB in the beginning and 275.8MB in the end (delta: 64.0MB). Free memory was 175.1MB in the beginning and 167.9MB in the end (delta: 7.2MB). Peak memory consumption was 72.2MB. Max. memory is 8.0GB. [2022-04-06 09:44:15,769 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 211.8MB. Free memory is still 177.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 171.18ms. Allocated memory is still 211.8MB. Free memory was 160.1MB in the beginning and 188.2MB in the end (delta: -28.1MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 23.45ms. Allocated memory is still 211.8MB. Free memory was 188.2MB in the beginning and 186.6MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 218.70ms. Allocated memory is still 211.8MB. Free memory was 186.6MB in the beginning and 176.7MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 16.07ms. Allocated memory is still 211.8MB. Free memory was 176.7MB in the beginning and 175.6MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 2743.06ms. Allocated memory was 211.8MB in the beginning and 275.8MB in the end (delta: 64.0MB). Free memory was 175.1MB in the beginning and 167.9MB in the end (delta: 7.2MB). Peak memory consumption was 72.2MB. 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 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.6s, OverallIterations: 4, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 51 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 50 mSDsluCounter, 134 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 84 mSDsCounter, 28 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 128 IncrementalHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 28 mSolverCounterUnsat, 50 mSDtfsCounter, 128 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 98 GetRequests, 42 SyntacticMatches, 7 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, InterpolantAutomatonStates: 28, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 11 PreInvPairs, 17 NumberOfFragments, 93 HoareAnnotationTreeSize, 11 FomulaSimplifications, 14 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 121 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 78 NumberOfCodeBlocks, 78 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 97 ConstructedInterpolants, 0 QuantifiedInterpolants, 482 SizeOfPredicates, 6 NumberOfNonLiveVariables, 131 ConjunctsInSsa, 34 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 0/12 InterpolantCoveringCapability, 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: (hi <= lo + mid * 2 && lo <= hi) && lo + mid * 2 <= hi RESULT: Ultimate proved your program to be correct! [2022-04-06 09:44:15,804 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...