./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/termination-crafted/Arrays02-EquivalentConstantIndices.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8d31f386 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/termination-crafted/Arrays02-EquivalentConstantIndices.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 072df04afae5ae28487e0b8208c52f13961dea34 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.multireach-323-8d31f38 [2021-07-06 09:08:31,317 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-06 09:08:31,318 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-06 09:08:31,336 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-06 09:08:31,336 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-06 09:08:31,337 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-06 09:08:31,338 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-06 09:08:31,339 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-06 09:08:31,340 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-06 09:08:31,341 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-06 09:08:31,341 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-06 09:08:31,342 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-06 09:08:31,342 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-06 09:08:31,343 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-06 09:08:31,343 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-06 09:08:31,344 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-06 09:08:31,345 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-06 09:08:31,345 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-06 09:08:31,346 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-06 09:08:31,347 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-06 09:08:31,353 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-06 09:08:31,354 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-06 09:08:31,357 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-06 09:08:31,357 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-06 09:08:31,359 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-07-06 09:08:31,363 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-07-06 09:08:31,363 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-07-06 09:08:31,364 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-07-06 09:08:31,364 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-07-06 09:08:31,364 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-07-06 09:08:31,365 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-06 09:08:31,365 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-06 09:08:31,365 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-06 09:08:31,367 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-06 09:08:31,368 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-06 09:08:31,368 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-06 09:08:31,369 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-06 09:08:31,369 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-06 09:08:31,369 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-06 09:08:31,370 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-06 09:08:31,371 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-06 09:08:31,372 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2021-07-06 09:08:31,398 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-06 09:08:31,398 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-06 09:08:31,400 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-06 09:08:31,400 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-06 09:08:31,400 INFO L138 SettingsManager]: * Use SBE=true [2021-07-06 09:08:31,400 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-06 09:08:31,400 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-07-06 09:08:31,401 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-06 09:08:31,401 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-06 09:08:31,401 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-07-06 09:08:31,401 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-07-06 09:08:31,402 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-07-06 09:08:31,402 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-06 09:08:31,402 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-07-06 09:08:31,402 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-06 09:08:31,402 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-06 09:08:31,402 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-06 09:08:31,403 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-06 09:08:31,403 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-06 09:08:31,403 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-06 09:08:31,403 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-06 09:08:31,403 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-06 09:08:31,403 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-06 09:08:31,404 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-07-06 09:08:31,404 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 072df04afae5ae28487e0b8208c52f13961dea34 [2021-07-06 09:08:31,632 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-06 09:08:31,644 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-06 09:08:31,645 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-06 09:08:31,646 INFO L271 PluginConnector]: Initializing CDTParser... [2021-07-06 09:08:31,646 INFO L275 PluginConnector]: CDTParser initialized [2021-07-06 09:08:31,647 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/Arrays02-EquivalentConstantIndices.c [2021-07-06 09:08:31,691 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a430c73c9/7f1b66585acb4c548eaf0f07a9aec3f7/FLAGe258b29ab [2021-07-06 09:08:32,017 INFO L306 CDTParser]: Found 1 translation units. [2021-07-06 09:08:32,022 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/Arrays02-EquivalentConstantIndices.c [2021-07-06 09:08:32,027 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a430c73c9/7f1b66585acb4c548eaf0f07a9aec3f7/FLAGe258b29ab [2021-07-06 09:08:32,040 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a430c73c9/7f1b66585acb4c548eaf0f07a9aec3f7 [2021-07-06 09:08:32,043 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-06 09:08:32,045 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-07-06 09:08:32,046 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-07-06 09:08:32,046 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-07-06 09:08:32,049 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-07-06 09:08:32,049 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.07 09:08:32" (1/1) ... [2021-07-06 09:08:32,051 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4aa43250 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 09:08:32, skipping insertion in model container [2021-07-06 09:08:32,051 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.07 09:08:32" (1/1) ... [2021-07-06 09:08:32,056 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-07-06 09:08:32,063 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-07-06 09:08:32,158 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-06 09:08:32,160 INFO L203 MainTranslator]: Completed pre-run [2021-07-06 09:08:32,170 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-06 09:08:32,205 INFO L208 MainTranslator]: Completed translation [2021-07-06 09:08:32,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 09:08:32 WrapperNode [2021-07-06 09:08:32,206 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-07-06 09:08:32,206 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-06 09:08:32,206 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-06 09:08:32,207 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-06 09:08:32,213 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 09:08:32" (1/1) ... [2021-07-06 09:08:32,213 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 09:08:32" (1/1) ... [2021-07-06 09:08:32,216 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 09:08:32" (1/1) ... [2021-07-06 09:08:32,217 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 09:08:32" (1/1) ... [2021-07-06 09:08:32,220 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 09:08:32" (1/1) ... [2021-07-06 09:08:32,222 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 09:08:32" (1/1) ... [2021-07-06 09:08:32,226 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 09:08:32" (1/1) ... [2021-07-06 09:08:32,228 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-06 09:08:32,230 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-06 09:08:32,230 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-06 09:08:32,230 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-06 09:08:32,230 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 09:08:32" (1/1) ... [2021-07-06 09:08:32,235 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-06 09:08:32,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-07-06 09:08:32,257 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) [2021-07-06 09:08:32,288 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 [2021-07-06 09:08:32,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-07-06 09:08:32,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-06 09:08:32,299 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-07-06 09:08:32,299 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-07-06 09:08:32,299 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-07-06 09:08:32,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-07-06 09:08:32,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-07-06 09:08:32,300 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-07-06 09:08:32,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-07-06 09:08:32,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-07-06 09:08:32,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-06 09:08:32,435 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-06 09:08:32,435 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-07-06 09:08:32,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.07 09:08:32 BoogieIcfgContainer [2021-07-06 09:08:32,436 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-06 09:08:32,437 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-06 09:08:32,437 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-06 09:08:32,439 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-06 09:08:32,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.07 09:08:32" (1/3) ... [2021-07-06 09:08:32,440 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41e3914b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.07 09:08:32, skipping insertion in model container [2021-07-06 09:08:32,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 09:08:32" (2/3) ... [2021-07-06 09:08:32,440 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41e3914b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.07 09:08:32, skipping insertion in model container [2021-07-06 09:08:32,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.07 09:08:32" (3/3) ... [2021-07-06 09:08:32,441 INFO L111 eAbstractionObserver]: Analyzing ICFG Arrays02-EquivalentConstantIndices.c [2021-07-06 09:08:32,465 INFO L198 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-06 09:08:32,466 INFO L158 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2021-07-06 09:08:32,501 INFO L328 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == mainErr0REQUIRES_VIOLATION ======== [2021-07-06 09:08:32,521 INFO L329 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=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mLimitAnalysisTime=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-07-06 09:08:32,522 INFO L330 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-06 09:08:32,531 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 26 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-07-06 09:08:32,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-07-06 09:08:32,535 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 09:08:32,536 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-07-06 09:08:32,536 INFO L374 AbstractCegarLoop]: === Iteration 1 === [mainErr0REQUIRES_VIOLATION] === [2021-07-06 09:08:32,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 09:08:32,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1997870250, now seen corresponding path program 1 times [2021-07-06 09:08:32,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 09:08:32,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185466929] [2021-07-06 09:08:32,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 09:08:32,547 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 09:08:32,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 09:08:32,638 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:08:32,639 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:08:32,639 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:08:32,640 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-07-06 09:08:32,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 09:08:32,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 09:08:32,661 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:08:32,661 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:08:32,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-06 09:08:32,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 09:08:32,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185466929] [2021-07-06 09:08:32,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185466929] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 09:08:32,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 09:08:32,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-06 09:08:32,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240528391] [2021-07-06 09:08:32,670 INFO L425 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-06 09:08:32,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 09:08:32,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-06 09:08:32,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-06 09:08:32,682 INFO L87 Difference]: Start difference. First operand has 31 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 26 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 09:08:32,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 09:08:32,764 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-07-06 09:08:32,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-06 09:08:32,765 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2021-07-06 09:08:32,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 09:08:32,768 INFO L225 Difference]: With dead ends: 26 [2021-07-06 09:08:32,769 INFO L226 Difference]: Without dead ends: 0 [2021-07-06 09:08:32,769 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-06 09:08:32,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-06 09:08:32,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-06 09:08:32,783 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) [2021-07-06 09:08:32,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-06 09:08:32,784 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 7 [2021-07-06 09:08:32,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 09:08:32,784 INFO L442 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-06 09:08:32,785 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 09:08:32,785 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-06 09:08:32,785 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-06 09:08:32,787 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-06 09:08:32,787 WARN L182 nStatisticsGenerator]: total relevant statements: 0 [2021-07-06 09:08:32,790 INFO L303 ceAbstractionStarter]: Result for error location mainErr0REQUIRES_VIOLATION was SAFE (1/11) [2021-07-06 09:08:32,803 INFO L328 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == mainErr1REQUIRES_VIOLATION ======== [2021-07-06 09:08:32,806 INFO L329 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=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mLimitAnalysisTime=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-07-06 09:08:32,806 INFO L330 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-06 09:08:32,807 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 26 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-07-06 09:08:32,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-07-06 09:08:32,809 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 09:08:32,809 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-07-06 09:08:32,809 INFO L374 AbstractCegarLoop]: === Iteration 1 === [mainErr1REQUIRES_VIOLATION] === [2021-07-06 09:08:32,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 09:08:32,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1997870251, now seen corresponding path program 1 times [2021-07-06 09:08:32,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 09:08:32,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650927635] [2021-07-06 09:08:32,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 09:08:32,812 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 09:08:32,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 09:08:32,830 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:08:32,831 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:08:32,835 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:08:32,835 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-07-06 09:08:32,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 09:08:32,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 09:08:32,854 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:08:32,855 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:08:32,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-06 09:08:32,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 09:08:32,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650927635] [2021-07-06 09:08:32,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650927635] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 09:08:32,856 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 09:08:32,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-06 09:08:32,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569420836] [2021-07-06 09:08:32,857 INFO L425 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-06 09:08:32,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 09:08:32,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-06 09:08:32,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-06 09:08:32,859 INFO L87 Difference]: Start difference. First operand has 31 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 26 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 09:08:32,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 09:08:32,913 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-07-06 09:08:32,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-06 09:08:32,914 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2021-07-06 09:08:32,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 09:08:32,915 INFO L225 Difference]: With dead ends: 26 [2021-07-06 09:08:32,915 INFO L226 Difference]: Without dead ends: 0 [2021-07-06 09:08:32,915 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-06 09:08:32,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-06 09:08:32,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-06 09:08:32,916 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) [2021-07-06 09:08:32,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-06 09:08:32,916 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 7 [2021-07-06 09:08:32,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 09:08:32,916 INFO L442 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-06 09:08:32,917 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 09:08:32,917 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-06 09:08:32,918 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-06 09:08:32,920 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-06 09:08:32,920 WARN L182 nStatisticsGenerator]: total relevant statements: 0 [2021-07-06 09:08:32,920 INFO L303 ceAbstractionStarter]: Result for error location mainErr1REQUIRES_VIOLATION was SAFE (2/11) [2021-07-06 09:08:32,923 INFO L328 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == mainErr2REQUIRES_VIOLATION ======== [2021-07-06 09:08:32,925 INFO L329 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=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mLimitAnalysisTime=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-07-06 09:08:32,926 INFO L330 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-06 09:08:32,927 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 26 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-07-06 09:08:32,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-07-06 09:08:32,929 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 09:08:32,929 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 09:08:32,929 INFO L374 AbstractCegarLoop]: === Iteration 1 === [mainErr2REQUIRES_VIOLATION] === [2021-07-06 09:08:32,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 09:08:32,930 INFO L82 PathProgramCache]: Analyzing trace with hash 102928271, now seen corresponding path program 1 times [2021-07-06 09:08:32,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 09:08:32,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411200647] [2021-07-06 09:08:32,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 09:08:32,931 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 09:08:32,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 09:08:32,947 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:08:32,947 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:08:32,948 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:08:32,948 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-07-06 09:08:32,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 09:08:32,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 09:08:32,960 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:08:32,960 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:08:32,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-06 09:08:32,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 09:08:32,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411200647] [2021-07-06 09:08:32,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411200647] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 09:08:32,961 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 09:08:32,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-06 09:08:32,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84588976] [2021-07-06 09:08:32,961 INFO L425 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-06 09:08:32,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 09:08:32,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-06 09:08:32,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-06 09:08:32,962 INFO L87 Difference]: Start difference. First operand has 31 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 26 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 09:08:33,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 09:08:33,011 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-07-06 09:08:33,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-06 09:08:33,012 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-07-06 09:08:33,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 09:08:33,012 INFO L225 Difference]: With dead ends: 26 [2021-07-06 09:08:33,012 INFO L226 Difference]: Without dead ends: 0 [2021-07-06 09:08:33,013 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-06 09:08:33,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-06 09:08:33,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-06 09:08:33,013 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) [2021-07-06 09:08:33,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-06 09:08:33,013 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 9 [2021-07-06 09:08:33,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 09:08:33,014 INFO L442 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-06 09:08:33,014 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 09:08:33,014 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-06 09:08:33,014 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-06 09:08:33,014 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-06 09:08:33,014 WARN L182 nStatisticsGenerator]: total relevant statements: 0 [2021-07-06 09:08:33,015 INFO L303 ceAbstractionStarter]: Result for error location mainErr2REQUIRES_VIOLATION was SAFE (3/11) [2021-07-06 09:08:33,015 INFO L328 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == mainErr3REQUIRES_VIOLATION ======== [2021-07-06 09:08:33,016 INFO L329 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=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mLimitAnalysisTime=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-07-06 09:08:33,016 INFO L330 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-06 09:08:33,017 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 26 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-07-06 09:08:33,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-07-06 09:08:33,018 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 09:08:33,018 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 09:08:33,018 INFO L374 AbstractCegarLoop]: === Iteration 1 === [mainErr3REQUIRES_VIOLATION] === [2021-07-06 09:08:33,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 09:08:33,018 INFO L82 PathProgramCache]: Analyzing trace with hash 102928272, now seen corresponding path program 1 times [2021-07-06 09:08:33,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 09:08:33,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359500460] [2021-07-06 09:08:33,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 09:08:33,019 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 09:08:33,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 09:08:33,032 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:08:33,033 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:08:33,034 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:08:33,034 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:08:33,039 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:08:33,040 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-07-06 09:08:33,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 09:08:33,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 09:08:33,061 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:08:33,061 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:08:33,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-06 09:08:33,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 09:08:33,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359500460] [2021-07-06 09:08:33,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359500460] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 09:08:33,062 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 09:08:33,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-06 09:08:33,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261273941] [2021-07-06 09:08:33,063 INFO L425 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-06 09:08:33,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 09:08:33,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-06 09:08:33,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-06 09:08:33,065 INFO L87 Difference]: Start difference. First operand has 31 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 26 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 09:08:33,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 09:08:33,122 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-07-06 09:08:33,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-06 09:08:33,122 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-07-06 09:08:33,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 09:08:33,123 INFO L225 Difference]: With dead ends: 26 [2021-07-06 09:08:33,123 INFO L226 Difference]: Without dead ends: 0 [2021-07-06 09:08:33,123 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 15.8ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-06 09:08:33,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-06 09:08:33,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-06 09:08:33,124 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) [2021-07-06 09:08:33,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-06 09:08:33,124 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 9 [2021-07-06 09:08:33,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 09:08:33,124 INFO L442 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-06 09:08:33,124 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 09:08:33,124 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-06 09:08:33,125 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-06 09:08:33,125 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-06 09:08:33,125 WARN L182 nStatisticsGenerator]: total relevant statements: 0 [2021-07-06 09:08:33,125 INFO L303 ceAbstractionStarter]: Result for error location mainErr3REQUIRES_VIOLATION was SAFE (4/11) [2021-07-06 09:08:33,126 INFO L328 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == mainErr4REQUIRES_VIOLATION ======== [2021-07-06 09:08:33,126 INFO L329 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=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mLimitAnalysisTime=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-07-06 09:08:33,127 INFO L330 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-06 09:08:33,127 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 26 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-07-06 09:08:33,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-06 09:08:33,128 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 09:08:33,128 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 09:08:33,128 INFO L374 AbstractCegarLoop]: === Iteration 1 === [mainErr4REQUIRES_VIOLATION] === [2021-07-06 09:08:33,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 09:08:33,128 INFO L82 PathProgramCache]: Analyzing trace with hash 129820336, now seen corresponding path program 1 times [2021-07-06 09:08:33,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 09:08:33,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248394450] [2021-07-06 09:08:33,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 09:08:33,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 09:08:33,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 09:08:33,140 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:08:33,141 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:08:33,141 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:08:33,141 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-07-06 09:08:33,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 09:08:33,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 09:08:33,152 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:08:33,152 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:08:33,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-06 09:08:33,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 09:08:33,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248394450] [2021-07-06 09:08:33,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248394450] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 09:08:33,153 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 09:08:33,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-06 09:08:33,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227000667] [2021-07-06 09:08:33,154 INFO L425 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-06 09:08:33,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 09:08:33,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-06 09:08:33,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-06 09:08:33,154 INFO L87 Difference]: Start difference. First operand has 31 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 26 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 09:08:33,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 09:08:33,190 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-07-06 09:08:33,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-06 09:08:33,191 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-07-06 09:08:33,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 09:08:33,191 INFO L225 Difference]: With dead ends: 26 [2021-07-06 09:08:33,191 INFO L226 Difference]: Without dead ends: 0 [2021-07-06 09:08:33,191 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-06 09:08:33,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-06 09:08:33,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-06 09:08:33,192 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) [2021-07-06 09:08:33,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-06 09:08:33,192 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2021-07-06 09:08:33,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 09:08:33,193 INFO L442 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-06 09:08:33,193 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 09:08:33,193 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-06 09:08:33,193 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-06 09:08:33,193 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-06 09:08:33,193 WARN L182 nStatisticsGenerator]: total relevant statements: 0 [2021-07-06 09:08:33,193 INFO L303 ceAbstractionStarter]: Result for error location mainErr4REQUIRES_VIOLATION was SAFE (5/11) [2021-07-06 09:08:33,194 INFO L328 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == mainErr5REQUIRES_VIOLATION ======== [2021-07-06 09:08:33,195 INFO L329 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=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mLimitAnalysisTime=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-07-06 09:08:33,195 INFO L330 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-06 09:08:33,196 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 26 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-07-06 09:08:33,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-06 09:08:33,196 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 09:08:33,196 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 09:08:33,196 INFO L374 AbstractCegarLoop]: === Iteration 1 === [mainErr5REQUIRES_VIOLATION] === [2021-07-06 09:08:33,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 09:08:33,197 INFO L82 PathProgramCache]: Analyzing trace with hash 129820337, now seen corresponding path program 1 times [2021-07-06 09:08:33,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 09:08:33,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904790274] [2021-07-06 09:08:33,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 09:08:33,197 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 09:08:33,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 09:08:33,210 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:08:33,210 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:08:33,210 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:08:33,211 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:08:33,215 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:08:33,215 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-07-06 09:08:33,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 09:08:33,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 09:08:33,229 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:08:33,229 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:08:33,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-06 09:08:33,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 09:08:33,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904790274] [2021-07-06 09:08:33,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904790274] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 09:08:33,230 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 09:08:33,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-06 09:08:33,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090717262] [2021-07-06 09:08:33,230 INFO L425 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-06 09:08:33,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 09:08:33,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-06 09:08:33,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-06 09:08:33,231 INFO L87 Difference]: Start difference. First operand has 31 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 26 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 09:08:33,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 09:08:33,264 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-07-06 09:08:33,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-06 09:08:33,264 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-07-06 09:08:33,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 09:08:33,264 INFO L225 Difference]: With dead ends: 26 [2021-07-06 09:08:33,264 INFO L226 Difference]: Without dead ends: 0 [2021-07-06 09:08:33,265 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.5ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-06 09:08:33,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-06 09:08:33,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-06 09:08:33,265 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) [2021-07-06 09:08:33,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-06 09:08:33,265 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2021-07-06 09:08:33,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 09:08:33,265 INFO L442 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-06 09:08:33,265 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 09:08:33,265 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-06 09:08:33,265 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-06 09:08:33,266 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-07-06 09:08:33,266 WARN L182 nStatisticsGenerator]: total relevant statements: 0 [2021-07-06 09:08:33,266 INFO L303 ceAbstractionStarter]: Result for error location mainErr5REQUIRES_VIOLATION was SAFE (6/11) [2021-07-06 09:08:33,267 INFO L328 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == mainErr6REQUIRES_VIOLATION ======== [2021-07-06 09:08:33,267 INFO L329 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=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mLimitAnalysisTime=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-07-06 09:08:33,267 INFO L330 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-06 09:08:33,268 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 26 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-07-06 09:08:33,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-06 09:08:33,268 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 09:08:33,268 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 09:08:33,268 INFO L374 AbstractCegarLoop]: === Iteration 1 === [mainErr6REQUIRES_VIOLATION] === [2021-07-06 09:08:33,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 09:08:33,268 INFO L82 PathProgramCache]: Analyzing trace with hash -270536885, now seen corresponding path program 1 times [2021-07-06 09:08:33,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 09:08:33,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555021927] [2021-07-06 09:08:33,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 09:08:33,269 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 09:08:33,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 09:08:33,279 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:08:33,279 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:08:33,280 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:08:33,280 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-07-06 09:08:33,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 09:08:33,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 09:08:33,290 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:08:33,290 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:08:33,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-06 09:08:33,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 09:08:33,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555021927] [2021-07-06 09:08:33,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555021927] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 09:08:33,291 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 09:08:33,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-06 09:08:33,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259282414] [2021-07-06 09:08:33,291 INFO L425 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-06 09:08:33,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 09:08:33,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-06 09:08:33,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-06 09:08:33,292 INFO L87 Difference]: Start difference. First operand has 31 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 26 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 09:08:33,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 09:08:33,331 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-07-06 09:08:33,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-06 09:08:33,331 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-07-06 09:08:33,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 09:08:33,332 INFO L225 Difference]: With dead ends: 26 [2021-07-06 09:08:33,332 INFO L226 Difference]: Without dead ends: 0 [2021-07-06 09:08:33,332 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-06 09:08:33,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-06 09:08:33,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-06 09:08:33,332 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) [2021-07-06 09:08:33,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-06 09:08:33,333 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2021-07-06 09:08:33,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 09:08:33,333 INFO L442 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-06 09:08:33,333 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 09:08:33,333 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-06 09:08:33,333 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-06 09:08:33,333 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-06 09:08:33,333 WARN L182 nStatisticsGenerator]: total relevant statements: 0 [2021-07-06 09:08:33,334 INFO L303 ceAbstractionStarter]: Result for error location mainErr6REQUIRES_VIOLATION was SAFE (7/11) [2021-07-06 09:08:33,334 INFO L328 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == mainErr7REQUIRES_VIOLATION ======== [2021-07-06 09:08:33,335 INFO L329 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=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mLimitAnalysisTime=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-07-06 09:08:33,335 INFO L330 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-06 09:08:33,336 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 26 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-07-06 09:08:33,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-06 09:08:33,336 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 09:08:33,336 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 09:08:33,336 INFO L374 AbstractCegarLoop]: === Iteration 1 === [mainErr7REQUIRES_VIOLATION] === [2021-07-06 09:08:33,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 09:08:33,337 INFO L82 PathProgramCache]: Analyzing trace with hash -270536884, now seen corresponding path program 1 times [2021-07-06 09:08:33,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 09:08:33,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886531179] [2021-07-06 09:08:33,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 09:08:33,337 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 09:08:33,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 09:08:33,362 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:08:33,362 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:08:33,363 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:08:33,363 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:08:33,366 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:08:33,367 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-07-06 09:08:33,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 09:08:33,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 09:08:33,380 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:08:33,381 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:08:33,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-06 09:08:33,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 09:08:33,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886531179] [2021-07-06 09:08:33,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886531179] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 09:08:33,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 09:08:33,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-06 09:08:33,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415014768] [2021-07-06 09:08:33,382 INFO L425 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-06 09:08:33,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 09:08:33,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-06 09:08:33,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-06 09:08:33,383 INFO L87 Difference]: Start difference. First operand has 31 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 26 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 09:08:33,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 09:08:33,429 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-07-06 09:08:33,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-06 09:08:33,430 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-07-06 09:08:33,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 09:08:33,430 INFO L225 Difference]: With dead ends: 26 [2021-07-06 09:08:33,430 INFO L226 Difference]: Without dead ends: 0 [2021-07-06 09:08:33,430 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.4ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-06 09:08:33,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-06 09:08:33,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-06 09:08:33,431 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) [2021-07-06 09:08:33,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-06 09:08:33,431 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2021-07-06 09:08:33,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 09:08:33,431 INFO L442 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-06 09:08:33,431 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 09:08:33,431 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-06 09:08:33,432 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-06 09:08:33,432 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-07-06 09:08:33,432 WARN L182 nStatisticsGenerator]: total relevant statements: 0 [2021-07-06 09:08:33,432 INFO L303 ceAbstractionStarter]: Result for error location mainErr7REQUIRES_VIOLATION was SAFE (8/11) [2021-07-06 09:08:33,433 INFO L328 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == mainErr8REQUIRES_VIOLATION ======== [2021-07-06 09:08:33,433 INFO L329 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=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mLimitAnalysisTime=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-07-06 09:08:33,433 INFO L330 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-06 09:08:33,434 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 26 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-07-06 09:08:33,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-06 09:08:33,434 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 09:08:33,435 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 09:08:33,435 INFO L374 AbstractCegarLoop]: === Iteration 1 === [mainErr8REQUIRES_VIOLATION] === [2021-07-06 09:08:33,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 09:08:33,435 INFO L82 PathProgramCache]: Analyzing trace with hash 2007058508, now seen corresponding path program 1 times [2021-07-06 09:08:33,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 09:08:33,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060320904] [2021-07-06 09:08:33,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 09:08:33,436 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 09:08:33,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 09:08:33,448 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:08:33,449 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:08:33,450 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:08:33,450 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-07-06 09:08:33,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 09:08:33,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 09:08:33,463 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:08:33,464 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:08:33,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-06 09:08:33,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 09:08:33,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060320904] [2021-07-06 09:08:33,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060320904] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 09:08:33,464 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 09:08:33,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-06 09:08:33,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661201186] [2021-07-06 09:08:33,465 INFO L425 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-06 09:08:33,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 09:08:33,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-06 09:08:33,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-06 09:08:33,465 INFO L87 Difference]: Start difference. First operand has 31 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 26 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 09:08:33,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 09:08:33,500 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-07-06 09:08:33,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-06 09:08:33,501 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-07-06 09:08:33,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 09:08:33,501 INFO L225 Difference]: With dead ends: 26 [2021-07-06 09:08:33,501 INFO L226 Difference]: Without dead ends: 0 [2021-07-06 09:08:33,501 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-06 09:08:33,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-06 09:08:33,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-06 09:08:33,501 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) [2021-07-06 09:08:33,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-06 09:08:33,502 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2021-07-06 09:08:33,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 09:08:33,502 INFO L442 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-06 09:08:33,502 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 09:08:33,502 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-06 09:08:33,502 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-06 09:08:33,502 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-07-06 09:08:33,502 WARN L182 nStatisticsGenerator]: total relevant statements: 0 [2021-07-06 09:08:33,502 INFO L303 ceAbstractionStarter]: Result for error location mainErr8REQUIRES_VIOLATION was SAFE (9/11) [2021-07-06 09:08:33,503 INFO L328 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == mainErr9REQUIRES_VIOLATION ======== [2021-07-06 09:08:33,503 INFO L329 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=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mLimitAnalysisTime=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-07-06 09:08:33,504 INFO L330 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-06 09:08:33,504 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 26 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-07-06 09:08:33,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-06 09:08:33,505 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 09:08:33,505 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 09:08:33,505 INFO L374 AbstractCegarLoop]: === Iteration 1 === [mainErr9REQUIRES_VIOLATION] === [2021-07-06 09:08:33,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 09:08:33,505 INFO L82 PathProgramCache]: Analyzing trace with hash 2007058509, now seen corresponding path program 1 times [2021-07-06 09:08:33,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 09:08:33,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475517872] [2021-07-06 09:08:33,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 09:08:33,506 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 09:08:33,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 09:08:33,518 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:08:33,518 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:08:33,518 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:08:33,519 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:08:33,521 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:08:33,521 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-07-06 09:08:33,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 09:08:33,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 09:08:33,546 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:08:33,547 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:08:33,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-06 09:08:33,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 09:08:33,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475517872] [2021-07-06 09:08:33,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475517872] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 09:08:33,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 09:08:33,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-06 09:08:33,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305642940] [2021-07-06 09:08:33,548 INFO L425 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-06 09:08:33,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 09:08:33,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-06 09:08:33,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-06 09:08:33,548 INFO L87 Difference]: Start difference. First operand has 31 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 26 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 09:08:33,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 09:08:33,580 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-07-06 09:08:33,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-06 09:08:33,580 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-07-06 09:08:33,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 09:08:33,580 INFO L225 Difference]: With dead ends: 26 [2021-07-06 09:08:33,580 INFO L226 Difference]: Without dead ends: 0 [2021-07-06 09:08:33,581 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 24.0ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-06 09:08:33,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-06 09:08:33,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-06 09:08:33,581 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) [2021-07-06 09:08:33,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-06 09:08:33,581 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2021-07-06 09:08:33,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 09:08:33,581 INFO L442 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-06 09:08:33,581 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 09:08:33,581 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-06 09:08:33,581 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-06 09:08:33,581 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-07-06 09:08:33,582 WARN L182 nStatisticsGenerator]: total relevant statements: 0 [2021-07-06 09:08:33,582 INFO L303 ceAbstractionStarter]: Result for error location mainErr9REQUIRES_VIOLATION was SAFE (10/11) [2021-07-06 09:08:33,582 INFO L328 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == mainErr10ENSURES_VIOLATIONMEMORY_LEAK ======== [2021-07-06 09:08:33,583 INFO L329 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=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mLimitAnalysisTime=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-07-06 09:08:33,583 INFO L330 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-06 09:08:33,583 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 26 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-07-06 09:08:33,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-06 09:08:33,583 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 09:08:33,584 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 09:08:33,584 INFO L374 AbstractCegarLoop]: === Iteration 1 === [mainErr10ENSURES_VIOLATIONMEMORY_LEAK] === [2021-07-06 09:08:33,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 09:08:33,584 INFO L82 PathProgramCache]: Analyzing trace with hash 129840036, now seen corresponding path program 1 times [2021-07-06 09:08:33,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 09:08:33,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072367667] [2021-07-06 09:08:33,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 09:08:33,584 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 09:08:33,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 09:08:33,590 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:08:33,591 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:08:33,591 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:08:33,591 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:08:33,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 09:08:33,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 09:08:33,598 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:08:33,598 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:08:33,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-06 09:08:33,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 09:08:33,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072367667] [2021-07-06 09:08:33,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072367667] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 09:08:33,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 09:08:33,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-06 09:08:33,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427072046] [2021-07-06 09:08:33,599 INFO L425 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-06 09:08:33,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 09:08:33,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-06 09:08:33,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-06 09:08:33,599 INFO L87 Difference]: Start difference. First operand has 31 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 26 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 09:08:33,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 09:08:33,629 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2021-07-06 09:08:33,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-06 09:08:33,629 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), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-07-06 09:08:33,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 09:08:33,631 INFO L225 Difference]: With dead ends: 31 [2021-07-06 09:08:33,631 INFO L226 Difference]: Without dead ends: 18 [2021-07-06 09:08:33,631 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-06 09:08:33,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-07-06 09:08:33,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-07-06 09:08:33,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 09:08:33,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2021-07-06 09:08:33,636 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 11 [2021-07-06 09:08:33,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 09:08:33,636 INFO L442 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2021-07-06 09:08:33,636 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 09:08:33,636 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2021-07-06 09:08:33,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-06 09:08:33,636 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 09:08:33,636 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 09:08:33,637 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-07-06 09:08:33,637 INFO L374 AbstractCegarLoop]: === Iteration 2 === [mainErr10ENSURES_VIOLATIONMEMORY_LEAK] === [2021-07-06 09:08:33,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 09:08:33,637 INFO L82 PathProgramCache]: Analyzing trace with hash -270538361, now seen corresponding path program 1 times [2021-07-06 09:08:33,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 09:08:33,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72865845] [2021-07-06 09:08:33,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 09:08:33,637 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 09:08:33,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 09:08:33,667 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:08:33,667 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:08:33,667 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:08:33,668 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:08:33,670 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:08:33,670 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-07-06 09:08:33,674 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:08:33,674 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:08:33,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 09:08:33,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 09:08:33,681 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:08:33,682 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:08:33,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-06 09:08:33,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 09:08:33,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72865845] [2021-07-06 09:08:33,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72865845] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 09:08:33,682 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 09:08:33,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-06 09:08:33,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005800263] [2021-07-06 09:08:33,683 INFO L425 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-06 09:08:33,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 09:08:33,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-06 09:08:33,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-06 09:08:33,684 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 09:08:33,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 09:08:33,703 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2021-07-06 09:08:33,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-06 09:08:33,704 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-07-06 09:08:33,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 09:08:33,704 INFO L225 Difference]: With dead ends: 17 [2021-07-06 09:08:33,704 INFO L226 Difference]: Without dead ends: 0 [2021-07-06 09:08:33,705 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.9ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-06 09:08:33,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-06 09:08:33,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-06 09:08:33,705 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) [2021-07-06 09:08:33,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-06 09:08:33,705 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2021-07-06 09:08:33,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 09:08:33,705 INFO L442 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-06 09:08:33,706 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 09:08:33,706 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-06 09:08:33,706 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-06 09:08:33,706 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-07-06 09:08:33,706 WARN L182 nStatisticsGenerator]: total relevant statements: 0 [2021-07-06 09:08:33,706 INFO L303 ceAbstractionStarter]: Result for error location mainErr10ENSURES_VIOLATIONMEMORY_LEAK was SAFE (11/11) [2021-07-06 09:08:33,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.07 09:08:33 BoogieIcfgContainer [2021-07-06 09:08:33,709 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-06 09:08:33,710 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-07-06 09:08:33,710 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-07-06 09:08:33,710 INFO L275 PluginConnector]: Witness Printer initialized [2021-07-06 09:08:33,710 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.07 09:08:32" (3/4) ... [2021-07-06 09:08:33,712 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-07-06 09:08:33,716 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-07-06 09:08:33,716 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-07-06 09:08:33,718 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-07-06 09:08:33,718 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-07-06 09:08:33,719 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-07-06 09:08:33,719 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-07-06 09:08:33,740 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-07-06 09:08:33,740 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-07-06 09:08:33,741 INFO L168 Benchmark]: Toolchain (without parser) took 1696.04 ms. Allocated memory was 60.8 MB in the beginning and 88.1 MB in the end (delta: 27.3 MB). Free memory was 39.6 MB in the beginning and 69.8 MB in the end (delta: -30.2 MB). Peak memory consumption was 34.1 MB. Max. memory is 16.1 GB. [2021-07-06 09:08:33,741 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 60.8 MB. Free memory is still 42.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-07-06 09:08:33,741 INFO L168 Benchmark]: CACSL2BoogieTranslator took 159.71 ms. Allocated memory is still 60.8 MB. Free memory was 39.5 MB in the beginning and 44.9 MB in the end (delta: -5.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-07-06 09:08:33,741 INFO L168 Benchmark]: Boogie Preprocessor took 22.38 ms. Allocated memory is still 60.8 MB. Free memory was 44.9 MB in the beginning and 43.4 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-07-06 09:08:33,742 INFO L168 Benchmark]: RCFGBuilder took 206.82 ms. Allocated memory is still 60.8 MB. Free memory was 43.4 MB in the beginning and 30.1 MB in the end (delta: 13.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-07-06 09:08:33,742 INFO L168 Benchmark]: TraceAbstraction took 1272.17 ms. Allocated memory was 60.8 MB in the beginning and 88.1 MB in the end (delta: 27.3 MB). Free memory was 29.8 MB in the beginning and 34.1 MB in the end (delta: -4.4 MB). Peak memory consumption was 24.9 MB. Max. memory is 16.1 GB. [2021-07-06 09:08:33,742 INFO L168 Benchmark]: Witness Printer took 30.46 ms. Allocated memory is still 88.1 MB. Free memory was 34.1 MB in the beginning and 69.8 MB in the end (delta: -35.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-07-06 09:08:33,743 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 60.8 MB. Free memory is still 42.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 159.71 ms. Allocated memory is still 60.8 MB. Free memory was 39.5 MB in the beginning and 44.9 MB in the end (delta: -5.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.38 ms. Allocated memory is still 60.8 MB. Free memory was 44.9 MB in the beginning and 43.4 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 206.82 ms. Allocated memory is still 60.8 MB. Free memory was 43.4 MB in the beginning and 30.1 MB in the end (delta: 13.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1272.17 ms. Allocated memory was 60.8 MB in the beginning and 88.1 MB in the end (delta: 27.3 MB). Free memory was 29.8 MB in the beginning and 34.1 MB in the end (delta: -4.4 MB). Peak memory consumption was 24.9 MB. Max. memory is 16.1 GB. * Witness Printer took 30.46 ms. Allocated memory is still 88.1 MB. Free memory was 34.1 MB in the beginning and 69.8 MB in the end (delta: -35.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 11]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 11]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 13]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 13]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 14]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 14]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 14]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 14]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 15]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 15]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 8]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data for error location: mainErr0REQUIRES_VIOLATION CFG has 3 procedures, 31 locations, 11 error locations. Started 1 CEGAR loops. OverallTime: 290.2ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 7.0ms, AutomataDifference: 98.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 13 SDtfs, 15 SDslu, 8 SDs, 0 SdLazy, 38 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 50.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=0, InterpolantAutomatonStates: 4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 6.1ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 8.3ms SsaConstructionTime, 17.4ms SatisfiabilityAnalysisTime, 53.6ms InterpolantComputationTime, 7 NumberOfCodeBlocks, 7 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 19 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 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 - StatisticsResult: Ultimate Automizer benchmark data for error location: mainErr1REQUIRES_VIOLATION CFG has 3 procedures, 31 locations, 11 error locations. Started 1 CEGAR loops. OverallTime: 117.3ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 4.1ms, AutomataDifference: 58.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 0.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 13 SDtfs, 15 SDslu, 11 SDs, 0 SdLazy, 35 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 37.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=0, InterpolantAutomatonStates: 4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 0.6ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.1ms SsaConstructionTime, 6.7ms SatisfiabilityAnalysisTime, 33.6ms InterpolantComputationTime, 7 NumberOfCodeBlocks, 7 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 23 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 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 - StatisticsResult: Ultimate Automizer benchmark data for error location: mainErr2REQUIRES_VIOLATION CFG has 3 procedures, 31 locations, 11 error locations. Started 1 CEGAR loops. OverallTime: 91.2ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 1.8ms, AutomataDifference: 50.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 0.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 13 SDtfs, 13 SDslu, 8 SDs, 0 SdLazy, 38 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 38.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=0, InterpolantAutomatonStates: 4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 0.6ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2.8ms SsaConstructionTime, 4.7ms SatisfiabilityAnalysisTime, 19.4ms InterpolantComputationTime, 9 NumberOfCodeBlocks, 9 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 8 ConstructedInterpolants, 0 QuantifiedInterpolants, 25 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 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 - StatisticsResult: Ultimate Automizer benchmark data for error location: mainErr3REQUIRES_VIOLATION CFG has 3 procedures, 31 locations, 11 error locations. Started 1 CEGAR loops. OverallTime: 109.6ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 0.8ms, AutomataDifference: 58.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 0.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 13 SDtfs, 28 SDslu, 11 SDs, 0 SdLazy, 35 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 40.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 15.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=0, InterpolantAutomatonStates: 4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 0.5ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.8ms SsaConstructionTime, 4.1ms SatisfiabilityAnalysisTime, 36.3ms InterpolantComputationTime, 9 NumberOfCodeBlocks, 9 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 8 ConstructedInterpolants, 0 QuantifiedInterpolants, 39 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 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 - StatisticsResult: Ultimate Automizer benchmark data for error location: mainErr4REQUIRES_VIOLATION CFG has 3 procedures, 31 locations, 11 error locations. Started 1 CEGAR loops. OverallTime: 67.5ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 0.8ms, AutomataDifference: 37.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 0.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 13 SDtfs, 11 SDslu, 8 SDs, 0 SdLazy, 38 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 26.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=0, InterpolantAutomatonStates: 4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 0.6ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.6ms SsaConstructionTime, 3.4ms SatisfiabilityAnalysisTime, 18.0ms InterpolantComputationTime, 11 NumberOfCodeBlocks, 11 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 35 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 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 - StatisticsResult: Ultimate Automizer benchmark data for error location: mainErr5REQUIRES_VIOLATION CFG has 3 procedures, 31 locations, 11 error locations. Started 1 CEGAR loops. OverallTime: 71.6ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 0.7ms, AutomataDifference: 34.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 0.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 13 SDtfs, 26 SDslu, 11 SDs, 0 SdLazy, 35 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 23.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=0, InterpolantAutomatonStates: 4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 0.3ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.7ms SsaConstructionTime, 3.6ms SatisfiabilityAnalysisTime, 26.7ms InterpolantComputationTime, 11 NumberOfCodeBlocks, 11 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 61 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 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 - StatisticsResult: Ultimate Automizer benchmark data for error location: mainErr6REQUIRES_VIOLATION CFG has 3 procedures, 31 locations, 11 error locations. Started 1 CEGAR loops. OverallTime: 67.0ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 0.6ms, AutomataDifference: 40.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 0.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 13 SDtfs, 10 SDslu, 8 SDs, 0 SdLazy, 38 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 29.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=0, InterpolantAutomatonStates: 4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 0.4ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.7ms SsaConstructionTime, 3.3ms SatisfiabilityAnalysisTime, 16.7ms InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 11 ConstructedInterpolants, 0 QuantifiedInterpolants, 40 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 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 - StatisticsResult: Ultimate Automizer benchmark data for error location: mainErr7REQUIRES_VIOLATION CFG has 3 procedures, 31 locations, 11 error locations. Started 1 CEGAR loops. OverallTime: 97.6ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 0.8ms, AutomataDifference: 47.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 0.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 13 SDtfs, 25 SDslu, 11 SDs, 0 SdLazy, 35 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 33.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=0, InterpolantAutomatonStates: 4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 0.5ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.8ms SsaConstructionTime, 3.8ms SatisfiabilityAnalysisTime, 37.7ms InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 11 ConstructedInterpolants, 0 QuantifiedInterpolants, 72 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 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 - StatisticsResult: Ultimate Automizer benchmark data for error location: mainErr8REQUIRES_VIOLATION CFG has 3 procedures, 31 locations, 11 error locations. Started 1 CEGAR loops. OverallTime: 69.6ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 0.7ms, AutomataDifference: 36.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 0.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 13 SDtfs, 8 SDslu, 8 SDs, 0 SdLazy, 38 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 25.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=0, InterpolantAutomatonStates: 4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 0.4ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.8ms SsaConstructionTime, 3.3ms SatisfiabilityAnalysisTime, 22.9ms InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 13 ConstructedInterpolants, 0 QuantifiedInterpolants, 50 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 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 - StatisticsResult: Ultimate Automizer benchmark data for error location: mainErr9REQUIRES_VIOLATION CFG has 3 procedures, 31 locations, 11 error locations. Started 1 CEGAR loops. OverallTime: 78.5ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 0.6ms, AutomataDifference: 32.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 0.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 13 SDtfs, 23 SDslu, 11 SDs, 0 SdLazy, 35 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 23.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 24.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=0, InterpolantAutomatonStates: 4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 0.3ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.8ms SsaConstructionTime, 3.4ms SatisfiabilityAnalysisTime, 35.7ms InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 13 ConstructedInterpolants, 0 QuantifiedInterpolants, 94 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 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 - StatisticsResult: Ultimate Automizer benchmark data for error location: mainErr10ENSURES_VIOLATIONMEMORY_LEAK CFG has 3 procedures, 31 locations, 11 error locations. Started 1 CEGAR loops. OverallTime: 123.9ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 0.9ms, AutomataDifference: 53.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 0.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 38 SDtfs, 6 SDslu, 14 SDs, 0 SdLazy, 58 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 34.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=0, InterpolantAutomatonStates: 7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 5.0ms AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.0ms SsaConstructionTime, 13.2ms SatisfiabilityAnalysisTime, 42.9ms InterpolantComputationTime, 23 NumberOfCodeBlocks, 23 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 21 ConstructedInterpolants, 0 QuantifiedInterpolants, 68 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 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 11 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-07-06 09:08:33,774 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...