/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/loops/sum03-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-24 02:45:43,914 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-24 02:45:43,915 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-24 02:45:43,941 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-24 02:45:43,969 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-24 02:45:43,970 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-24 02:45:43,970 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-24 02:45:43,971 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-02-24 02:45:43,977 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-24 02:45:43,977 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-24 02:45:43,978 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-24 02:45:43,978 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-24 02:45:43,978 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-24 02:45:43,978 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-24 02:45:43,978 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-24 02:45:43,978 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-24 02:45:43,978 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-24 02:45:43,979 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-24 02:45:43,979 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-24 02:45:43,979 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-24 02:45:43,979 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-24 02:45:43,979 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-24 02:45:43,979 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-24 02:45:43,979 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 02:45:43,979 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-24 02:45:43,980 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-24 02:45:43,980 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-24 02:45:43,980 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-24 02:45:43,980 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-24 02:45:44,166 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-24 02:45:44,184 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-24 02:45:44,186 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-24 02:45:44,187 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-24 02:45:44,188 INFO L275 PluginConnector]: CDTParser initialized [2022-02-24 02:45:44,188 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum03-2.i [2022-02-24 02:45:44,273 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59bb6ba03/3ce4689b5a844516bea05db8b5a7438d/FLAG9a02abfdd [2022-02-24 02:45:44,569 INFO L306 CDTParser]: Found 1 translation units. [2022-02-24 02:45:44,569 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum03-2.i [2022-02-24 02:45:44,574 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59bb6ba03/3ce4689b5a844516bea05db8b5a7438d/FLAG9a02abfdd [2022-02-24 02:45:45,009 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59bb6ba03/3ce4689b5a844516bea05db8b5a7438d [2022-02-24 02:45:45,011 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-24 02:45:45,012 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-24 02:45:45,013 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-24 02:45:45,013 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-24 02:45:45,015 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-24 02:45:45,016 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 02:45:45" (1/1) ... [2022-02-24 02:45:45,017 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@658d0e16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:45, skipping insertion in model container [2022-02-24 02:45:45,017 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 02:45:45" (1/1) ... [2022-02-24 02:45:45,021 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-24 02:45:45,029 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-24 02:45:45,179 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/sum03-2.i[807,820] [2022-02-24 02:45:45,186 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 02:45:45,190 INFO L203 MainTranslator]: Completed pre-run [2022-02-24 02:45:45,198 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/sum03-2.i[807,820] [2022-02-24 02:45:45,199 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 02:45:45,207 INFO L208 MainTranslator]: Completed translation [2022-02-24 02:45:45,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:45 WrapperNode [2022-02-24 02:45:45,207 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-24 02:45:45,208 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-24 02:45:45,208 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-24 02:45:45,208 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-24 02:45:45,215 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:45" (1/1) ... [2022-02-24 02:45:45,215 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:45" (1/1) ... [2022-02-24 02:45:45,219 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:45" (1/1) ... [2022-02-24 02:45:45,219 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:45" (1/1) ... [2022-02-24 02:45:45,221 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:45" (1/1) ... [2022-02-24 02:45:45,223 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:45" (1/1) ... [2022-02-24 02:45:45,224 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:45" (1/1) ... [2022-02-24 02:45:45,224 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-24 02:45:45,225 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-24 02:45:45,225 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-24 02:45:45,225 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-24 02:45:45,228 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:45" (1/1) ... [2022-02-24 02:45:45,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 02:45:45,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 02:45:45,256 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-24 02:45:45,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-24 02:45:45,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-24 02:45:45,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-24 02:45:45,316 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-24 02:45:45,316 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-24 02:45:45,316 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-24 02:45:45,316 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-24 02:45:45,316 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-24 02:45:45,317 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-02-24 02:45:45,317 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-02-24 02:45:45,317 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-24 02:45:45,317 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-24 02:45:45,317 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-24 02:45:45,318 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-02-24 02:45:45,318 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-24 02:45:45,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-24 02:45:45,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-24 02:45:45,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-24 02:45:45,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-24 02:45:45,320 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-24 02:45:45,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-24 02:45:45,374 INFO L234 CfgBuilder]: Building ICFG [2022-02-24 02:45:45,376 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-24 02:45:45,447 INFO L275 CfgBuilder]: Performing block encoding [2022-02-24 02:45:45,451 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-24 02:45:45,451 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-24 02:45:45,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 02:45:45 BoogieIcfgContainer [2022-02-24 02:45:45,452 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-24 02:45:45,453 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-24 02:45:45,454 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-24 02:45:45,456 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-24 02:45:45,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 02:45:45" (1/3) ... [2022-02-24 02:45:45,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d779810 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 02:45:45, skipping insertion in model container [2022-02-24 02:45:45,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:45" (2/3) ... [2022-02-24 02:45:45,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d779810 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 02:45:45, skipping insertion in model container [2022-02-24 02:45:45,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 02:45:45" (3/3) ... [2022-02-24 02:45:45,458 INFO L111 eAbstractionObserver]: Analyzing ICFG sum03-2.i [2022-02-24 02:45:45,461 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-24 02:45:45,461 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-24 02:45:45,489 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-24 02:45:45,493 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=QVASR [2022-02-24 02:45:45,494 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-24 02:45:45,506 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 12 states have internal predecessors, (14), 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) [2022-02-24 02:45:45,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-24 02:45:45,520 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:45,520 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:45,531 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:45,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:45,535 INFO L85 PathProgramCache]: Analyzing trace with hash -107069111, now seen corresponding path program 1 times [2022-02-24 02:45:45,555 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:45,555 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1848280289] [2022-02-24 02:45:45,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:45,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:45,630 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 02:45:45,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:46,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:46,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:46,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:46,013 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:46,014 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1848280289] [2022-02-24 02:45:46,016 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1848280289] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:46,016 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:46,016 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 02:45:46,018 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271186527] [2022-02-24 02:45:46,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:46,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 02:45:46,022 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:46,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 02:45:46,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-02-24 02:45:46,043 INFO L87 Difference]: Start difference. First operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 12 states have internal predecessors, (14), 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 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 5 states have internal predecessors, (7), 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) [2022-02-24 02:45:46,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:46,232 INFO L93 Difference]: Finished difference Result 33 states and 45 transitions. [2022-02-24 02:45:46,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 02:45:46,236 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 5 states have internal predecessors, (7), 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 11 [2022-02-24 02:45:46,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:46,244 INFO L225 Difference]: With dead ends: 33 [2022-02-24 02:45:46,244 INFO L226 Difference]: Without dead ends: 21 [2022-02-24 02:45:46,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-02-24 02:45:46,254 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 16 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:46,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 27 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:45:46,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-02-24 02:45:46,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2022-02-24 02:45:46,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 13 states have internal predecessors, (13), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:45:46,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2022-02-24 02:45:46,295 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 11 [2022-02-24 02:45:46,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:46,295 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2022-02-24 02:45:46,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 5 states have internal predecessors, (7), 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) [2022-02-24 02:45:46,295 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2022-02-24 02:45:46,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-24 02:45:46,296 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:46,296 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:46,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-24 02:45:46,296 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:46,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:46,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1456105815, now seen corresponding path program 1 times [2022-02-24 02:45:46,297 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:46,297 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1458385589] [2022-02-24 02:45:46,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:46,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:46,533 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:45:46,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:46,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:46,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:46,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:47,003 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:47,003 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1458385589] [2022-02-24 02:45:47,004 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1458385589] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:47,004 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:47,004 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 02:45:47,004 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097239298] [2022-02-24 02:45:47,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:47,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 02:45:47,005 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:47,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 02:45:47,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-02-24 02:45:47,006 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand has 11 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 7 states have internal predecessors, (11), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:47,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:47,090 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2022-02-24 02:45:47,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 02:45:47,090 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 7 states have internal predecessors, (11), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-02-24 02:45:47,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:47,091 INFO L225 Difference]: With dead ends: 20 [2022-02-24 02:45:47,091 INFO L226 Difference]: Without dead ends: 0 [2022-02-24 02:45:47,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-02-24 02:45:47,092 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 9 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:47,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 40 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 02:45:47,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-24 02:45:47,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-24 02:45:47,094 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) [2022-02-24 02:45:47,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-24 02:45:47,094 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2022-02-24 02:45:47,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:47,094 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-24 02:45:47,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 7 states have internal predecessors, (11), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:47,094 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-24 02:45:47,095 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-24 02:45:47,096 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-24 02:45:47,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-24 02:45:47,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-02-24 02:45:47,200 INFO L858 garLoopResultBuilder]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2022-02-24 02:45:47,200 INFO L858 garLoopResultBuilder]: For program point reach_errorENTRY(line 12) no Hoare annotation was computed. [2022-02-24 02:45:47,200 INFO L858 garLoopResultBuilder]: For program point L12-1(line 12) no Hoare annotation was computed. [2022-02-24 02:45:47,200 INFO L861 garLoopResultBuilder]: At program point mainENTRY(lines 20 29) the Hoare annotation is: true [2022-02-24 02:45:47,201 INFO L854 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: (and (<= 0 (div (+ (* (- 1) main_~sn~0) 2) (- 2))) (= (* main_~x~0 2) main_~sn~0)) [2022-02-24 02:45:47,201 INFO L854 garLoopResultBuilder]: At program point L27-1(lines 24 28) the Hoare annotation is: (or (and (<= 0 (div (+ (* (- 1) main_~sn~0) 2) (- 2))) (= (* main_~x~0 2) main_~sn~0)) (and (= main_~sn~0 0) (= main_~x~0 0))) [2022-02-24 02:45:47,201 INFO L854 garLoopResultBuilder]: At program point mainEXIT(lines 20 29) the Hoare annotation is: false [2022-02-24 02:45:47,201 INFO L854 garLoopResultBuilder]: At program point L24-2(lines 20 29) the Hoare annotation is: false [2022-02-24 02:45:47,201 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-02-24 02:45:47,201 INFO L854 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-02-24 02:45:47,201 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-02-24 02:45:47,201 INFO L854 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: false [2022-02-24 02:45:47,201 INFO L861 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-02-24 02:45:47,201 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-02-24 02:45:47,202 INFO L854 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: false [2022-02-24 02:45:47,202 INFO L854 garLoopResultBuilder]: At program point L15(line 15) the Hoare annotation is: (not (= |__VERIFIER_assert_#in~cond| 1)) [2022-02-24 02:45:47,202 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 13 18) the Hoare annotation is: true [2022-02-24 02:45:47,202 INFO L854 garLoopResultBuilder]: At program point L14(lines 14 16) the Hoare annotation is: (or (not (= |__VERIFIER_assert_#in~cond| 1)) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2022-02-24 02:45:47,202 INFO L854 garLoopResultBuilder]: At program point L14-2(lines 13 18) the Hoare annotation is: (or (not (= |__VERIFIER_assert_#in~cond| 1)) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2022-02-24 02:45:47,202 INFO L854 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 13 18) the Hoare annotation is: (or (not (= |__VERIFIER_assert_#in~cond| 1)) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2022-02-24 02:45:47,202 INFO L854 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) the Hoare annotation is: (not (= |__VERIFIER_assert_#in~cond| 1)) [2022-02-24 02:45:47,204 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2022-02-24 02:45:47,205 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-24 02:45:47,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 02:45:47 BoogieIcfgContainer [2022-02-24 02:45:47,215 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-24 02:45:47,216 INFO L158 Benchmark]: Toolchain (without parser) took 2203.35ms. Allocated memory was 173.0MB in the beginning and 228.6MB in the end (delta: 55.6MB). Free memory was 122.7MB in the beginning and 175.0MB in the end (delta: -52.3MB). Peak memory consumption was 3.6MB. Max. memory is 8.0GB. [2022-02-24 02:45:47,216 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 173.0MB. Free memory is still 138.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-24 02:45:47,216 INFO L158 Benchmark]: CACSL2BoogieTranslator took 194.49ms. Allocated memory was 173.0MB in the beginning and 228.6MB in the end (delta: 55.6MB). Free memory was 122.5MB in the beginning and 205.8MB in the end (delta: -83.3MB). Peak memory consumption was 10.7MB. Max. memory is 8.0GB. [2022-02-24 02:45:47,216 INFO L158 Benchmark]: Boogie Preprocessor took 16.35ms. Allocated memory is still 228.6MB. Free memory was 205.8MB in the beginning and 204.3MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-24 02:45:47,217 INFO L158 Benchmark]: RCFGBuilder took 227.34ms. Allocated memory is still 228.6MB. Free memory was 204.3MB in the beginning and 194.7MB in the end (delta: 9.6MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-02-24 02:45:47,217 INFO L158 Benchmark]: TraceAbstraction took 1761.70ms. Allocated memory is still 228.6MB. Free memory was 193.8MB in the beginning and 175.0MB in the end (delta: 18.8MB). Peak memory consumption was 20.2MB. Max. memory is 8.0GB. [2022-02-24 02:45:47,218 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 173.0MB. Free memory is still 138.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 194.49ms. Allocated memory was 173.0MB in the beginning and 228.6MB in the end (delta: 55.6MB). Free memory was 122.5MB in the beginning and 205.8MB in the end (delta: -83.3MB). Peak memory consumption was 10.7MB. Max. memory is 8.0GB. * Boogie Preprocessor took 16.35ms. Allocated memory is still 228.6MB. Free memory was 205.8MB in the beginning and 204.3MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 227.34ms. Allocated memory is still 228.6MB. Free memory was 204.3MB in the beginning and 194.7MB in the end (delta: 9.6MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 1761.70ms. Allocated memory is still 228.6MB. Free memory was 193.8MB in the beginning and 175.0MB in the end (delta: 18.8MB). Peak memory consumption was 20.2MB. 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: 15]: 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 5 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.7s, OverallIterations: 2, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 26 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 25 mSDsluCounter, 67 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 49 mSDsCounter, 20 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 70 IncrementalHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 20 mSolverCounterUnsat, 18 mSDtfsCounter, 70 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=1, InterpolantAutomatonStates: 15, 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, 2 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 18 LocationsWithAnnotation, 30 PreInvPairs, 38 NumberOfFragments, 87 HoareAnnotationTreeSize, 30 FomulaSimplifications, 16 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 18 FomulaSimplificationsInter, 194 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: (0 <= (-1 * sn + 2) / -2 && x * 2 == sn) || (sn == 0 && x == 0) - ProcedureContractResult [Line: 20]: Procedure Contract for main Derived contract for procedure main: 0 - ProcedureContractResult [Line: 13]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: !(\old(cond) == 1) || \old(cond) == cond RESULT: Ultimate proved your program to be correct! [2022-02-24 02:45:47,258 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...