./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/termination-crafted/SyntaxSupportPointer01-1.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/SyntaxSupportPointer01-1.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 f2a8d3919c0496882213752e07135061fdbafdf6 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 12:06:38,286 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-06 12:06:38,289 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-06 12:06:38,331 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-06 12:06:38,331 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-06 12:06:38,335 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-06 12:06:38,337 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-06 12:06:38,341 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-06 12:06:38,342 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-06 12:06:38,343 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-06 12:06:38,344 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-06 12:06:38,345 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-06 12:06:38,346 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-06 12:06:38,351 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-06 12:06:38,351 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-06 12:06:38,352 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-06 12:06:38,353 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-06 12:06:38,354 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-06 12:06:38,355 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-06 12:06:38,356 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-06 12:06:38,357 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-06 12:06:38,362 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-06 12:06:38,364 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-06 12:06:38,365 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-06 12:06:38,371 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-07-06 12:06:38,371 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-07-06 12:06:38,371 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-07-06 12:06:38,373 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-07-06 12:06:38,373 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-07-06 12:06:38,374 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-07-06 12:06:38,374 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-06 12:06:38,375 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-06 12:06:38,376 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-06 12:06:38,377 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-06 12:06:38,377 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-06 12:06:38,378 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-06 12:06:38,378 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-06 12:06:38,379 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-06 12:06:38,379 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-06 12:06:38,380 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-06 12:06:38,381 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-06 12:06:38,384 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2021-07-06 12:06:38,415 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-06 12:06:38,416 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-06 12:06:38,418 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-06 12:06:38,418 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-06 12:06:38,418 INFO L138 SettingsManager]: * Use SBE=true [2021-07-06 12:06:38,418 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-06 12:06:38,419 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-07-06 12:06:38,419 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-06 12:06:38,419 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-06 12:06:38,419 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-07-06 12:06:38,420 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-07-06 12:06:38,420 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-07-06 12:06:38,420 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-06 12:06:38,420 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-07-06 12:06:38,420 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-06 12:06:38,420 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-06 12:06:38,421 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-06 12:06:38,421 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-06 12:06:38,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-06 12:06:38,421 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-06 12:06:38,421 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-06 12:06:38,421 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-06 12:06:38,422 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-06 12:06:38,422 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-07-06 12:06:38,422 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f2a8d3919c0496882213752e07135061fdbafdf6 [2021-07-06 12:06:38,753 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-06 12:06:38,773 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-06 12:06:38,775 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-06 12:06:38,776 INFO L271 PluginConnector]: Initializing CDTParser... [2021-07-06 12:06:38,777 INFO L275 PluginConnector]: CDTParser initialized [2021-07-06 12:06:38,777 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/SyntaxSupportPointer01-1.c [2021-07-06 12:06:38,845 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d72b1b30/c90ee4c11f7c41718cb4b9567a6cf0ff/FLAG6abc75622 [2021-07-06 12:06:39,294 INFO L306 CDTParser]: Found 1 translation units. [2021-07-06 12:06:39,295 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/SyntaxSupportPointer01-1.c [2021-07-06 12:06:39,301 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d72b1b30/c90ee4c11f7c41718cb4b9567a6cf0ff/FLAG6abc75622 [2021-07-06 12:06:39,318 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d72b1b30/c90ee4c11f7c41718cb4b9567a6cf0ff [2021-07-06 12:06:39,320 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-06 12:06:39,322 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-07-06 12:06:39,323 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-07-06 12:06:39,324 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-07-06 12:06:39,326 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-07-06 12:06:39,327 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.07 12:06:39" (1/1) ... [2021-07-06 12:06:39,328 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fb4db37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 12:06:39, skipping insertion in model container [2021-07-06 12:06:39,328 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.07 12:06:39" (1/1) ... [2021-07-06 12:06:39,334 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-07-06 12:06:39,344 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-07-06 12:06:39,463 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-06 12:06:39,475 INFO L203 MainTranslator]: Completed pre-run [2021-07-06 12:06:39,487 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-06 12:06:39,500 INFO L208 MainTranslator]: Completed translation [2021-07-06 12:06:39,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 12:06:39 WrapperNode [2021-07-06 12:06:39,501 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-07-06 12:06:39,501 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-06 12:06:39,501 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-06 12:06:39,502 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-06 12:06:39,525 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 12:06:39" (1/1) ... [2021-07-06 12:06:39,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 12:06:39" (1/1) ... [2021-07-06 12:06:39,530 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 12:06:39" (1/1) ... [2021-07-06 12:06:39,531 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 12:06:39" (1/1) ... [2021-07-06 12:06:39,540 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 12:06:39" (1/1) ... [2021-07-06 12:06:39,545 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 12:06:39" (1/1) ... [2021-07-06 12:06:39,550 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 12:06:39" (1/1) ... [2021-07-06 12:06:39,551 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-06 12:06:39,554 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-06 12:06:39,554 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-06 12:06:39,554 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-06 12:06:39,563 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 12:06:39" (1/1) ... [2021-07-06 12:06:39,568 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-06 12:06:39,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-07-06 12:06:39,594 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 12:06:39,612 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 12:06:39,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-07-06 12:06:39,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-06 12:06:39,641 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-07-06 12:06:39,641 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-07-06 12:06:39,642 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-07-06 12:06:39,642 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-07-06 12:06:39,642 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-07-06 12:06:39,642 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-07-06 12:06:39,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-07-06 12:06:39,643 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-07-06 12:06:39,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-07-06 12:06:39,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-07-06 12:06:39,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-06 12:06:39,920 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-06 12:06:39,920 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-07-06 12:06:39,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.07 12:06:39 BoogieIcfgContainer [2021-07-06 12:06:39,921 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-06 12:06:39,922 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-06 12:06:39,923 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-06 12:06:39,925 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-06 12:06:39,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.07 12:06:39" (1/3) ... [2021-07-06 12:06:39,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13d41649 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.07 12:06:39, skipping insertion in model container [2021-07-06 12:06:39,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 12:06:39" (2/3) ... [2021-07-06 12:06:39,926 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13d41649 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.07 12:06:39, skipping insertion in model container [2021-07-06 12:06:39,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.07 12:06:39" (3/3) ... [2021-07-06 12:06:39,927 INFO L111 eAbstractionObserver]: Analyzing ICFG SyntaxSupportPointer01-1.c [2021-07-06 12:06:39,932 INFO L198 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-06 12:06:39,932 INFO L158 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2021-07-06 12:06:39,963 INFO L328 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == mainErr0REQUIRES_VIOLATION ======== [2021-07-06 12:06:39,968 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 12:06:39,969 INFO L330 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-06 12:06:39,985 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 16 states have (on average 1.875) internal successors, (30), 28 states have internal predecessors, (30), 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 12:06:39,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-07-06 12:06:39,990 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 12:06:39,991 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-07-06 12:06:39,991 INFO L374 AbstractCegarLoop]: === Iteration 1 === [mainErr0REQUIRES_VIOLATION] === [2021-07-06 12:06:39,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 12:06:39,997 INFO L82 PathProgramCache]: Analyzing trace with hash -522028180, now seen corresponding path program 1 times [2021-07-06 12:06:40,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 12:06:40,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715678427] [2021-07-06 12:06:40,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 12:06:40,012 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 12:06:40,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:06:40,153 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:06:40,154 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:06:40,155 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:06:40,156 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-07-06 12:06:40,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 12:06:40,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:06:40,217 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:06:40,218 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:06:40,221 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 12:06:40,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 12:06:40,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715678427] [2021-07-06 12:06:40,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715678427] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 12:06:40,223 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 12:06:40,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-06 12:06:40,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705319668] [2021-07-06 12:06:40,231 INFO L425 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-06 12:06:40,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 12:06:40,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-06 12:06:40,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-06 12:06:40,249 INFO L87 Difference]: Start difference. First operand has 33 states, 16 states have (on average 1.875) internal successors, (30), 28 states have internal predecessors, (30), 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 12:06:40,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 12:06:40,369 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2021-07-06 12:06:40,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-06 12:06:40,371 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 12:06:40,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 12:06:40,379 INFO L225 Difference]: With dead ends: 28 [2021-07-06 12:06:40,380 INFO L226 Difference]: Without dead ends: 0 [2021-07-06 12:06:40,381 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-06 12:06:40,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-06 12:06:40,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-06 12:06:40,398 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 12:06:40,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-06 12:06:40,399 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 7 [2021-07-06 12:06:40,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 12:06:40,400 INFO L442 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-06 12:06:40,400 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 12:06:40,400 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-06 12:06:40,401 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-06 12:06:40,403 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-06 12:06:40,403 WARN L182 nStatisticsGenerator]: total relevant statements: 0 [2021-07-06 12:06:40,406 INFO L303 ceAbstractionStarter]: Result for error location mainErr0REQUIRES_VIOLATION was SAFE (1/12) [2021-07-06 12:06:40,417 INFO L328 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == mainErr1REQUIRES_VIOLATION ======== [2021-07-06 12:06:40,419 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 12:06:40,419 INFO L330 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-06 12:06:40,424 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 16 states have (on average 1.875) internal successors, (30), 28 states have internal predecessors, (30), 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 12:06:40,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-07-06 12:06:40,425 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 12:06:40,425 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-07-06 12:06:40,426 INFO L374 AbstractCegarLoop]: === Iteration 1 === [mainErr1REQUIRES_VIOLATION] === [2021-07-06 12:06:40,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 12:06:40,427 INFO L82 PathProgramCache]: Analyzing trace with hash -522028179, now seen corresponding path program 1 times [2021-07-06 12:06:40,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 12:06:40,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422825307] [2021-07-06 12:06:40,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 12:06:40,428 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 12:06:40,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:06:40,480 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:06:40,482 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:06:40,488 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:06:40,490 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-07-06 12:06:40,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 12:06:40,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:06:40,529 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:06:40,530 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:06:40,531 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 12:06:40,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 12:06:40,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422825307] [2021-07-06 12:06:40,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422825307] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 12:06:40,532 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 12:06:40,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-06 12:06:40,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961022017] [2021-07-06 12:06:40,533 INFO L425 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-06 12:06:40,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 12:06:40,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-06 12:06:40,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-06 12:06:40,539 INFO L87 Difference]: Start difference. First operand has 33 states, 16 states have (on average 1.875) internal successors, (30), 28 states have internal predecessors, (30), 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 12:06:40,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 12:06:40,669 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2021-07-06 12:06:40,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-06 12:06:40,670 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 12:06:40,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 12:06:40,670 INFO L225 Difference]: With dead ends: 28 [2021-07-06 12:06:40,670 INFO L226 Difference]: Without dead ends: 0 [2021-07-06 12:06:40,671 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-06 12:06:40,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-06 12:06:40,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-06 12:06:40,671 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 12:06:40,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-06 12:06:40,672 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 7 [2021-07-06 12:06:40,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 12:06:40,672 INFO L442 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-06 12:06:40,672 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 12:06:40,672 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-06 12:06:40,673 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-06 12:06:40,673 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-06 12:06:40,673 WARN L182 nStatisticsGenerator]: total relevant statements: 0 [2021-07-06 12:06:40,673 INFO L303 ceAbstractionStarter]: Result for error location mainErr1REQUIRES_VIOLATION was SAFE (2/12) [2021-07-06 12:06:40,674 INFO L328 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == mainErr2REQUIRES_VIOLATION ======== [2021-07-06 12:06:40,675 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 12:06:40,675 INFO L330 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-06 12:06:40,676 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 16 states have (on average 1.875) internal successors, (30), 28 states have internal predecessors, (30), 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 12:06:40,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-07-06 12:06:40,677 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 12:06:40,677 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 12:06:40,677 INFO L374 AbstractCegarLoop]: === Iteration 1 === [mainErr2REQUIRES_VIOLATION] === [2021-07-06 12:06:40,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 12:06:40,678 INFO L82 PathProgramCache]: Analyzing trace with hash 842091985, now seen corresponding path program 1 times [2021-07-06 12:06:40,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 12:06:40,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378753537] [2021-07-06 12:06:40,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 12:06:40,679 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 12:06:40,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:06:40,693 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:06:40,694 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:06:40,709 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:06:40,709 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-07-06 12:06:40,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 12:06:40,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:06:40,724 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:06:40,725 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:06:40,725 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 12:06:40,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 12:06:40,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378753537] [2021-07-06 12:06:40,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378753537] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 12:06:40,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 12:06:40,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-06 12:06:40,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394757071] [2021-07-06 12:06:40,726 INFO L425 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-06 12:06:40,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 12:06:40,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-06 12:06:40,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-06 12:06:40,728 INFO L87 Difference]: Start difference. First operand has 33 states, 16 states have (on average 1.875) internal successors, (30), 28 states have internal predecessors, (30), 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 12:06:40,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 12:06:40,812 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2021-07-06 12:06:40,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-06 12:06:40,813 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 12:06:40,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 12:06:40,813 INFO L225 Difference]: With dead ends: 28 [2021-07-06 12:06:40,813 INFO L226 Difference]: Without dead ends: 0 [2021-07-06 12:06:40,814 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-06 12:06:40,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-06 12:06:40,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-06 12:06:40,814 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 12:06:40,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-06 12:06:40,814 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 9 [2021-07-06 12:06:40,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 12:06:40,815 INFO L442 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-06 12:06:40,815 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 12:06:40,815 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-06 12:06:40,815 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-06 12:06:40,815 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-06 12:06:40,815 WARN L182 nStatisticsGenerator]: total relevant statements: 0 [2021-07-06 12:06:40,816 INFO L303 ceAbstractionStarter]: Result for error location mainErr2REQUIRES_VIOLATION was SAFE (3/12) [2021-07-06 12:06:40,817 INFO L328 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == mainErr3REQUIRES_VIOLATION ======== [2021-07-06 12:06:40,817 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 12:06:40,817 INFO L330 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-06 12:06:40,819 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 16 states have (on average 1.875) internal successors, (30), 28 states have internal predecessors, (30), 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 12:06:40,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-07-06 12:06:40,819 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 12:06:40,820 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 12:06:40,820 INFO L374 AbstractCegarLoop]: === Iteration 1 === [mainErr3REQUIRES_VIOLATION] === [2021-07-06 12:06:40,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 12:06:40,820 INFO L82 PathProgramCache]: Analyzing trace with hash 842091986, now seen corresponding path program 1 times [2021-07-06 12:06:40,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 12:06:40,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358899723] [2021-07-06 12:06:40,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 12:06:40,821 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 12:06:40,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:06:40,850 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:06:40,851 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:06:40,852 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:06:40,853 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 12:06:40,856 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:06:40,858 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-07-06 12:06:40,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 12:06:40,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:06:40,903 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:06:40,904 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:06:40,904 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 12:06:40,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 12:06:40,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358899723] [2021-07-06 12:06:40,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358899723] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 12:06:40,905 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 12:06:40,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-06 12:06:40,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651047771] [2021-07-06 12:06:40,906 INFO L425 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-06 12:06:40,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 12:06:40,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-06 12:06:40,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-06 12:06:40,911 INFO L87 Difference]: Start difference. First operand has 33 states, 16 states have (on average 1.875) internal successors, (30), 28 states have internal predecessors, (30), 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 12:06:40,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 12:06:40,999 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2021-07-06 12:06:40,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-06 12:06:41,000 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 12:06:41,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 12:06:41,000 INFO L225 Difference]: With dead ends: 28 [2021-07-06 12:06:41,000 INFO L226 Difference]: Without dead ends: 0 [2021-07-06 12:06:41,001 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 33.9ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-06 12:06:41,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-06 12:06:41,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-06 12:06:41,001 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 12:06:41,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-06 12:06:41,002 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 9 [2021-07-06 12:06:41,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 12:06:41,002 INFO L442 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-06 12:06:41,002 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 12:06:41,002 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-06 12:06:41,002 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-06 12:06:41,003 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-06 12:06:41,003 WARN L182 nStatisticsGenerator]: total relevant statements: 0 [2021-07-06 12:06:41,003 INFO L303 ceAbstractionStarter]: Result for error location mainErr3REQUIRES_VIOLATION was SAFE (4/12) [2021-07-06 12:06:41,004 INFO L328 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == mainErr4REQUIRES_VIOLATION ======== [2021-07-06 12:06:41,005 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 12:06:41,005 INFO L330 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-06 12:06:41,006 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 16 states have (on average 1.875) internal successors, (30), 28 states have internal predecessors, (30), 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 12:06:41,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-06 12:06:41,007 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 12:06:41,007 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 12:06:41,007 INFO L374 AbstractCegarLoop]: === Iteration 1 === [mainErr4REQUIRES_VIOLATION] === [2021-07-06 12:06:41,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 12:06:41,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1796545650, now seen corresponding path program 1 times [2021-07-06 12:06:41,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 12:06:41,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428631894] [2021-07-06 12:06:41,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 12:06:41,009 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 12:06:41,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:06:41,029 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:06:41,029 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:06:41,031 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:06:41,034 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-07-06 12:06:41,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 12:06:41,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:06:41,062 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:06:41,063 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:06:41,063 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 12:06:41,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 12:06:41,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428631894] [2021-07-06 12:06:41,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428631894] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 12:06:41,063 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 12:06:41,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-06 12:06:41,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109519340] [2021-07-06 12:06:41,064 INFO L425 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-06 12:06:41,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 12:06:41,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-06 12:06:41,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-06 12:06:41,065 INFO L87 Difference]: Start difference. First operand has 33 states, 16 states have (on average 1.875) internal successors, (30), 28 states have internal predecessors, (30), 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 12:06:41,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 12:06:41,158 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2021-07-06 12:06:41,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-06 12:06:41,159 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 12:06:41,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 12:06:41,159 INFO L225 Difference]: With dead ends: 28 [2021-07-06 12:06:41,160 INFO L226 Difference]: Without dead ends: 0 [2021-07-06 12:06:41,160 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-06 12:06:41,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-06 12:06:41,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-06 12:06:41,160 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 12:06:41,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-06 12:06:41,161 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2021-07-06 12:06:41,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 12:06:41,161 INFO L442 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-06 12:06:41,161 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 12:06:41,161 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-06 12:06:41,162 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-06 12:06:41,162 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-06 12:06:41,162 WARN L182 nStatisticsGenerator]: total relevant statements: 0 [2021-07-06 12:06:41,162 INFO L303 ceAbstractionStarter]: Result for error location mainErr4REQUIRES_VIOLATION was SAFE (5/12) [2021-07-06 12:06:41,163 INFO L328 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == mainErr5REQUIRES_VIOLATION ======== [2021-07-06 12:06:41,164 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 12:06:41,165 INFO L330 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-06 12:06:41,167 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 16 states have (on average 1.875) internal successors, (30), 28 states have internal predecessors, (30), 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 12:06:41,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-06 12:06:41,171 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 12:06:41,171 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 12:06:41,171 INFO L374 AbstractCegarLoop]: === Iteration 1 === [mainErr5REQUIRES_VIOLATION] === [2021-07-06 12:06:41,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 12:06:41,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1796545651, now seen corresponding path program 1 times [2021-07-06 12:06:41,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 12:06:41,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558737584] [2021-07-06 12:06:41,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 12:06:41,172 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 12:06:41,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:06:41,195 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:06:41,196 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:06:41,196 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:06:41,197 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 12:06:41,201 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:06:41,202 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-07-06 12:06:41,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 12:06:41,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:06:41,232 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:06:41,233 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:06:41,234 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 12:06:41,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 12:06:41,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558737584] [2021-07-06 12:06:41,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558737584] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 12:06:41,237 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 12:06:41,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-06 12:06:41,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475643488] [2021-07-06 12:06:41,239 INFO L425 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-06 12:06:41,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 12:06:41,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-06 12:06:41,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-06 12:06:41,241 INFO L87 Difference]: Start difference. First operand has 33 states, 16 states have (on average 1.875) internal successors, (30), 28 states have internal predecessors, (30), 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 12:06:41,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 12:06:41,297 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2021-07-06 12:06:41,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-06 12:06:41,298 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 12:06:41,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 12:06:41,298 INFO L225 Difference]: With dead ends: 28 [2021-07-06 12:06:41,298 INFO L226 Difference]: Without dead ends: 0 [2021-07-06 12:06:41,299 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 31.0ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-06 12:06:41,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-06 12:06:41,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-06 12:06:41,299 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 12:06:41,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-06 12:06:41,300 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2021-07-06 12:06:41,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 12:06:41,300 INFO L442 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-06 12:06:41,300 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 12:06:41,300 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-06 12:06:41,300 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-06 12:06:41,301 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-07-06 12:06:41,301 WARN L182 nStatisticsGenerator]: total relevant statements: 0 [2021-07-06 12:06:41,301 INFO L303 ceAbstractionStarter]: Result for error location mainErr5REQUIRES_VIOLATION was SAFE (6/12) [2021-07-06 12:06:41,302 INFO L328 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == mainErr6REQUIRES_VIOLATION ======== [2021-07-06 12:06:41,303 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 12:06:41,303 INFO L330 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-06 12:06:41,304 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 16 states have (on average 1.875) internal successors, (30), 28 states have internal predecessors, (30), 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 12:06:41,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-06 12:06:41,305 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 12:06:41,305 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 12:06:41,305 INFO L374 AbstractCegarLoop]: === Iteration 1 === [mainErr6REQUIRES_VIOLATION] === [2021-07-06 12:06:41,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 12:06:41,306 INFO L82 PathProgramCache]: Analyzing trace with hash -96483501, now seen corresponding path program 1 times [2021-07-06 12:06:41,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 12:06:41,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724889826] [2021-07-06 12:06:41,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 12:06:41,306 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 12:06:41,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:06:41,341 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:06:41,341 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:06:41,342 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:06:41,342 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-07-06 12:06:41,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 12:06:41,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:06:41,370 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:06:41,371 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:06:41,374 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 12:06:41,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 12:06:41,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724889826] [2021-07-06 12:06:41,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724889826] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 12:06:41,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 12:06:41,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-06 12:06:41,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941893733] [2021-07-06 12:06:41,376 INFO L425 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-06 12:06:41,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 12:06:41,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-06 12:06:41,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-06 12:06:41,379 INFO L87 Difference]: Start difference. First operand has 33 states, 16 states have (on average 1.875) internal successors, (30), 28 states have internal predecessors, (30), 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 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 12:06:41,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 12:06:41,430 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2021-07-06 12:06:41,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-06 12:06:41,431 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 13 [2021-07-06 12:06:41,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 12:06:41,431 INFO L225 Difference]: With dead ends: 28 [2021-07-06 12:06:41,431 INFO L226 Difference]: Without dead ends: 0 [2021-07-06 12:06:41,432 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-06 12:06:41,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-06 12:06:41,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-06 12:06:41,432 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 12:06:41,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-06 12:06:41,432 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2021-07-06 12:06:41,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 12:06:41,433 INFO L442 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-06 12:06:41,433 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 12:06:41,433 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-06 12:06:41,433 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-06 12:06:41,434 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-06 12:06:41,434 WARN L182 nStatisticsGenerator]: total relevant statements: 0 [2021-07-06 12:06:41,434 INFO L303 ceAbstractionStarter]: Result for error location mainErr6REQUIRES_VIOLATION was SAFE (7/12) [2021-07-06 12:06:41,435 INFO L328 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == mainErr7REQUIRES_VIOLATION ======== [2021-07-06 12:06:41,436 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 12:06:41,436 INFO L330 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-06 12:06:41,437 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 16 states have (on average 1.875) internal successors, (30), 28 states have internal predecessors, (30), 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 12:06:41,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-06 12:06:41,438 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 12:06:41,438 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 12:06:41,438 INFO L374 AbstractCegarLoop]: === Iteration 1 === [mainErr7REQUIRES_VIOLATION] === [2021-07-06 12:06:41,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 12:06:41,439 INFO L82 PathProgramCache]: Analyzing trace with hash -96483500, now seen corresponding path program 1 times [2021-07-06 12:06:41,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 12:06:41,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075763548] [2021-07-06 12:06:41,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 12:06:41,439 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 12:06:41,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:06:41,456 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:06:41,457 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:06:41,457 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:06:41,458 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 12:06:41,461 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:06:41,462 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-07-06 12:06:41,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 12:06:41,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:06:41,484 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:06:41,484 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:06:41,485 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 12:06:41,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 12:06:41,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075763548] [2021-07-06 12:06:41,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075763548] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 12:06:41,486 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 12:06:41,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-06 12:06:41,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746439191] [2021-07-06 12:06:41,486 INFO L425 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-06 12:06:41,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 12:06:41,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-06 12:06:41,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-06 12:06:41,488 INFO L87 Difference]: Start difference. First operand has 33 states, 16 states have (on average 1.875) internal successors, (30), 28 states have internal predecessors, (30), 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 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 12:06:41,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 12:06:41,546 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2021-07-06 12:06:41,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-06 12:06:41,546 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 13 [2021-07-06 12:06:41,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 12:06:41,547 INFO L225 Difference]: With dead ends: 28 [2021-07-06 12:06:41,547 INFO L226 Difference]: Without dead ends: 0 [2021-07-06 12:06:41,548 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 28.0ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-06 12:06:41,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-06 12:06:41,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-06 12:06:41,548 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 12:06:41,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-06 12:06:41,549 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2021-07-06 12:06:41,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 12:06:41,549 INFO L442 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-06 12:06:41,549 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 12:06:41,549 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-06 12:06:41,549 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-06 12:06:41,550 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-07-06 12:06:41,550 WARN L182 nStatisticsGenerator]: total relevant statements: 0 [2021-07-06 12:06:41,550 INFO L303 ceAbstractionStarter]: Result for error location mainErr7REQUIRES_VIOLATION was SAFE (8/12) [2021-07-06 12:06:41,552 INFO L328 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == mainErr8ASSERT_VIOLATIONMEMORY_FREE ======== [2021-07-06 12:06:41,554 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 12:06:41,554 INFO L330 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-06 12:06:41,557 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 16 states have (on average 1.875) internal successors, (30), 28 states have internal predecessors, (30), 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 12:06:41,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-07-06 12:06:41,558 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 12:06:41,558 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 12:06:41,559 INFO L374 AbstractCegarLoop]: === Iteration 1 === [mainErr8ASSERT_VIOLATIONMEMORY_FREE] === [2021-07-06 12:06:41,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 12:06:41,560 INFO L82 PathProgramCache]: Analyzing trace with hash 335048288, now seen corresponding path program 1 times [2021-07-06 12:06:41,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 12:06:41,560 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739079111] [2021-07-06 12:06:41,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 12:06:41,560 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 12:06:41,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:06:41,592 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:06:41,593 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:06:41,594 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:06:41,595 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:06:41,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 12:06:41,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:06:41,609 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:06:41,610 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:06:41,610 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 12:06:41,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 12:06:41,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739079111] [2021-07-06 12:06:41,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739079111] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 12:06:41,610 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 12:06:41,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-06 12:06:41,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666743147] [2021-07-06 12:06:41,611 INFO L425 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-06 12:06:41,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 12:06:41,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-06 12:06:41,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-06 12:06:41,612 INFO L87 Difference]: Start difference. First operand has 33 states, 16 states have (on average 1.875) internal successors, (30), 28 states have internal predecessors, (30), 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 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 12:06:41,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 12:06:41,663 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2021-07-06 12:06:41,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-06 12:06:41,667 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 10 [2021-07-06 12:06:41,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 12:06:41,670 INFO L225 Difference]: With dead ends: 33 [2021-07-06 12:06:41,670 INFO L226 Difference]: Without dead ends: 16 [2021-07-06 12:06:41,670 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-06 12:06:41,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-07-06 12:06:41,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-07-06 12:06:41,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 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 12:06:41,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2021-07-06 12:06:41,680 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 10 [2021-07-06 12:06:41,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 12:06:41,680 INFO L442 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2021-07-06 12:06:41,680 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 12:06:41,681 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2021-07-06 12:06:41,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-06 12:06:41,681 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 12:06:41,681 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 12:06:41,681 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-07-06 12:06:41,681 INFO L374 AbstractCegarLoop]: === Iteration 2 === [mainErr8ASSERT_VIOLATIONMEMORY_FREE] === [2021-07-06 12:06:41,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 12:06:41,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1796545598, now seen corresponding path program 1 times [2021-07-06 12:06:41,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 12:06:41,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925847221] [2021-07-06 12:06:41,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 12:06:41,682 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 12:06:41,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:06:41,700 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:06:41,701 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:06:41,701 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:06:41,702 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 12:06:41,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 12:06:41,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:06:41,715 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:06:41,715 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:06:41,715 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 12:06:41,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 12:06:41,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925847221] [2021-07-06 12:06:41,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925847221] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 12:06:41,716 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 12:06:41,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-06 12:06:41,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112726537] [2021-07-06 12:06:41,717 INFO L425 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-06 12:06:41,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 12:06:41,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-06 12:06:41,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-06 12:06:41,718 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. 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 12:06:41,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 12:06:41,736 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2021-07-06 12:06:41,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-06 12:06:41,737 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 12:06:41,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 12:06:41,737 INFO L225 Difference]: With dead ends: 15 [2021-07-06 12:06:41,737 INFO L226 Difference]: Without dead ends: 0 [2021-07-06 12:06:41,738 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-06 12:06:41,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-06 12:06:41,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-06 12:06:41,738 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 12:06:41,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-06 12:06:41,739 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2021-07-06 12:06:41,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 12:06:41,739 INFO L442 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-06 12:06:41,739 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 12:06:41,739 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-06 12:06:41,739 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-06 12:06:41,740 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-07-06 12:06:41,740 WARN L182 nStatisticsGenerator]: total relevant statements: 0 [2021-07-06 12:06:41,740 INFO L303 ceAbstractionStarter]: Result for error location mainErr8ASSERT_VIOLATIONMEMORY_FREE was SAFE (9/12) [2021-07-06 12:06:41,741 INFO L328 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == mainErr9ASSERT_VIOLATIONMEMORY_FREE ======== [2021-07-06 12:06:41,741 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 12:06:41,742 INFO L330 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-06 12:06:41,742 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 16 states have (on average 1.875) internal successors, (30), 28 states have internal predecessors, (30), 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 12:06:41,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-06 12:06:41,743 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 12:06:41,743 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 12:06:41,743 INFO L374 AbstractCegarLoop]: === Iteration 1 === [mainErr9ASSERT_VIOLATIONMEMORY_FREE] === [2021-07-06 12:06:41,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 12:06:41,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1796562402, now seen corresponding path program 1 times [2021-07-06 12:06:41,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 12:06:41,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949548371] [2021-07-06 12:06:41,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 12:06:41,744 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 12:06:41,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:06:41,751 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:06:41,752 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:06:41,752 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:06:41,752 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:06:41,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 12:06:41,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:06:41,762 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:06:41,763 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:06:41,763 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 12:06:41,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 12:06:41,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949548371] [2021-07-06 12:06:41,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949548371] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 12:06:41,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 12:06:41,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-06 12:06:41,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549531195] [2021-07-06 12:06:41,764 INFO L425 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-06 12:06:41,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 12:06:41,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-06 12:06:41,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-06 12:06:41,765 INFO L87 Difference]: Start difference. First operand has 33 states, 16 states have (on average 1.875) internal successors, (30), 28 states have internal predecessors, (30), 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 12:06:41,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 12:06:41,813 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2021-07-06 12:06:41,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-06 12:06:41,814 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 12:06:41,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 12:06:41,816 INFO L225 Difference]: With dead ends: 33 [2021-07-06 12:06:41,816 INFO L226 Difference]: Without dead ends: 17 [2021-07-06 12:06:41,816 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-06 12:06:41,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-07-06 12:06:41,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-07-06 12:06:41,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 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 12:06:41,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-07-06 12:06:41,822 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 11 [2021-07-06 12:06:41,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 12:06:41,822 INFO L442 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-07-06 12:06:41,822 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 12:06:41,822 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-07-06 12:06:41,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-06 12:06:41,824 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 12:06:41,824 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 12:06:41,824 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-07-06 12:06:41,824 INFO L374 AbstractCegarLoop]: === Iteration 2 === [mainErr9ASSERT_VIOLATIONMEMORY_FREE] === [2021-07-06 12:06:41,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 12:06:41,825 INFO L82 PathProgramCache]: Analyzing trace with hash -141661244, now seen corresponding path program 1 times [2021-07-06 12:06:41,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 12:06:41,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130342990] [2021-07-06 12:06:41,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 12:06:41,826 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 12:06:41,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:06:41,857 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:06:41,858 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:06:41,858 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:06:41,859 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-07-06 12:06:41,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 12:06:41,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:06:41,872 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:06:41,872 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:06:41,873 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 12:06:41,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 12:06:41,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130342990] [2021-07-06 12:06:41,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130342990] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 12:06:41,873 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 12:06:41,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-06 12:06:41,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878669825] [2021-07-06 12:06:41,874 INFO L425 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-06 12:06:41,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 12:06:41,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-06 12:06:41,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-06 12:06:41,875 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. 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 12:06:41,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 12:06:41,894 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2021-07-06 12:06:41,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-06 12:06:41,895 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 12:06:41,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 12:06:41,895 INFO L225 Difference]: With dead ends: 16 [2021-07-06 12:06:41,895 INFO L226 Difference]: Without dead ends: 0 [2021-07-06 12:06:41,896 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-06 12:06:41,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-06 12:06:41,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-06 12:06:41,896 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 12:06:41,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-06 12:06:41,896 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2021-07-06 12:06:41,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 12:06:41,897 INFO L442 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-06 12:06:41,897 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 12:06:41,897 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-06 12:06:41,897 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-06 12:06:41,897 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-07-06 12:06:41,897 WARN L182 nStatisticsGenerator]: total relevant statements: 0 [2021-07-06 12:06:41,898 INFO L303 ceAbstractionStarter]: Result for error location mainErr9ASSERT_VIOLATIONMEMORY_FREE was SAFE (10/12) [2021-07-06 12:06:41,899 INFO L328 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == mainErr10ASSERT_VIOLATIONMEMORY_FREE ======== [2021-07-06 12:06:41,899 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 12:06:41,899 INFO L330 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-06 12:06:41,900 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 16 states have (on average 1.875) internal successors, (30), 28 states have internal predecessors, (30), 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 12:06:41,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-06 12:06:41,900 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 12:06:41,901 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 12:06:41,901 INFO L374 AbstractCegarLoop]: === Iteration 1 === [mainErr10ASSERT_VIOLATIONMEMORY_FREE] === [2021-07-06 12:06:41,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 12:06:41,901 INFO L82 PathProgramCache]: Analyzing trace with hash -141140318, now seen corresponding path program 1 times [2021-07-06 12:06:41,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 12:06:41,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119703021] [2021-07-06 12:06:41,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 12:06:41,902 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 12:06:41,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:06:41,916 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:06:41,916 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:06:41,917 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:06:41,917 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:06:41,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 12:06:41,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:06:41,935 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:06:41,936 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:06:41,937 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 12:06:41,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 12:06:41,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119703021] [2021-07-06 12:06:41,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119703021] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 12:06:41,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 12:06:41,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-06 12:06:41,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908012451] [2021-07-06 12:06:41,938 INFO L425 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-06 12:06:41,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 12:06:41,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-06 12:06:41,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-06 12:06:41,939 INFO L87 Difference]: Start difference. First operand has 33 states, 16 states have (on average 1.875) internal successors, (30), 28 states have internal predecessors, (30), 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 3.0) internal successors, (9), 2 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 12:06:41,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 12:06:41,976 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2021-07-06 12:06:41,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-06 12:06:41,976 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 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 12:06:41,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 12:06:41,977 INFO L225 Difference]: With dead ends: 33 [2021-07-06 12:06:41,977 INFO L226 Difference]: Without dead ends: 18 [2021-07-06 12:06:41,978 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-06 12:06:41,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-07-06 12:06:41,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-07-06 12:06:41,982 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 12:06:41,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2021-07-06 12:06:41,982 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 12 [2021-07-06 12:06:41,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 12:06:41,984 INFO L442 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2021-07-06 12:06:41,984 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 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 12:06:41,984 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2021-07-06 12:06:41,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-06 12:06:41,985 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 12:06:41,985 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 12:06:41,985 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-07-06 12:06:41,985 INFO L374 AbstractCegarLoop]: === Iteration 2 === [mainErr10ASSERT_VIOLATIONMEMORY_FREE] === [2021-07-06 12:06:41,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 12:06:41,986 INFO L82 PathProgramCache]: Analyzing trace with hash -96531200, now seen corresponding path program 1 times [2021-07-06 12:06:41,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 12:06:41,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510108654] [2021-07-06 12:06:41,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 12:06:41,987 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 12:06:41,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:06:42,008 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:06:42,009 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:06:42,010 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:06:42,010 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-07-06 12:06:42,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 12:06:42,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:06:42,023 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:06:42,024 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:06:42,025 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 12:06:42,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 12:06:42,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510108654] [2021-07-06 12:06:42,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510108654] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 12:06:42,026 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 12:06:42,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-06 12:06:42,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695442808] [2021-07-06 12:06:42,027 INFO L425 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-06 12:06:42,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 12:06:42,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-06 12:06:42,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-06 12:06:42,028 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 12:06:42,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 12:06:42,054 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2021-07-06 12:06:42,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-06 12:06:42,054 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 13 [2021-07-06 12:06:42,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 12:06:42,055 INFO L225 Difference]: With dead ends: 17 [2021-07-06 12:06:42,055 INFO L226 Difference]: Without dead ends: 0 [2021-07-06 12:06:42,055 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-06 12:06:42,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-06 12:06:42,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-06 12:06:42,056 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 12:06:42,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-06 12:06:42,056 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2021-07-06 12:06:42,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 12:06:42,056 INFO L442 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-06 12:06:42,056 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 12:06:42,057 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-06 12:06:42,057 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-06 12:06:42,058 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-07-06 12:06:42,058 WARN L182 nStatisticsGenerator]: total relevant statements: 0 [2021-07-06 12:06:42,060 INFO L303 ceAbstractionStarter]: Result for error location mainErr10ASSERT_VIOLATIONMEMORY_FREE was SAFE (11/12) [2021-07-06 12:06:42,061 INFO L328 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == mainErr11ENSURES_VIOLATIONMEMORY_LEAK ======== [2021-07-06 12:06:42,063 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 12:06:42,063 INFO L330 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-06 12:06:42,065 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 16 states have (on average 1.875) internal successors, (30), 28 states have internal predecessors, (30), 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 12:06:42,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-06 12:06:42,068 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 12:06:42,068 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 12:06:42,069 INFO L374 AbstractCegarLoop]: === Iteration 1 === [mainErr11ENSURES_VIOLATIONMEMORY_LEAK] === [2021-07-06 12:06:42,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 12:06:42,069 INFO L82 PathProgramCache]: Analyzing trace with hash -80382491, now seen corresponding path program 1 times [2021-07-06 12:06:42,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 12:06:42,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226433178] [2021-07-06 12:06:42,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 12:06:42,070 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 12:06:42,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:06:42,076 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:06:42,077 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:06:42,077 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:06:42,077 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:06:42,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 12:06:42,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:06:42,087 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:06:42,087 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:06:42,087 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 12:06:42,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 12:06:42,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226433178] [2021-07-06 12:06:42,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226433178] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 12:06:42,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 12:06:42,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-06 12:06:42,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928505017] [2021-07-06 12:06:42,088 INFO L425 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-06 12:06:42,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 12:06:42,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-06 12:06:42,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-06 12:06:42,089 INFO L87 Difference]: Start difference. First operand has 33 states, 16 states have (on average 1.875) internal successors, (30), 28 states have internal predecessors, (30), 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 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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 12:06:42,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 12:06:42,122 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2021-07-06 12:06:42,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-06 12:06:42,123 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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 13 [2021-07-06 12:06:42,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 12:06:42,123 INFO L225 Difference]: With dead ends: 33 [2021-07-06 12:06:42,123 INFO L226 Difference]: Without dead ends: 19 [2021-07-06 12:06:42,124 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-06 12:06:42,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-07-06 12:06:42,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-07-06 12:06:42,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 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 12:06:42,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-07-06 12:06:42,126 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 13 [2021-07-06 12:06:42,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 12:06:42,126 INFO L442 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-07-06 12:06:42,126 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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 12:06:42,126 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-07-06 12:06:42,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-06 12:06:42,127 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 12:06:42,127 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 12:06:42,127 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-07-06 12:06:42,127 INFO L374 AbstractCegarLoop]: === Iteration 2 === [mainErr11ENSURES_VIOLATIONMEMORY_LEAK] === [2021-07-06 12:06:42,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 12:06:42,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1302500167, now seen corresponding path program 1 times [2021-07-06 12:06:42,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 12:06:42,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080693488] [2021-07-06 12:06:42,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 12:06:42,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 12:06:42,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:06:42,149 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:06:42,150 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:06:42,150 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:06:42,150 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 12:06:42,153 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:06:42,154 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-07-06 12:06:42,158 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:06:42,158 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 12:06:42,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 12:06:42,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:06:42,169 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:06:42,170 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:06:42,170 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 12:06:42,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 12:06:42,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080693488] [2021-07-06 12:06:42,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080693488] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 12:06:42,171 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 12:06:42,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-06 12:06:42,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509094867] [2021-07-06 12:06:42,171 INFO L425 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-06 12:06:42,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 12:06:42,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-06 12:06:42,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-06 12:06:42,172 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. 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 12:06:42,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 12:06:42,198 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2021-07-06 12:06:42,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-06 12:06:42,204 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 12:06:42,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 12:06:42,204 INFO L225 Difference]: With dead ends: 18 [2021-07-06 12:06:42,204 INFO L226 Difference]: Without dead ends: 0 [2021-07-06 12:06:42,205 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.5ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-06 12:06:42,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-06 12:06:42,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-06 12:06:42,205 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 12:06:42,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-06 12:06:42,205 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2021-07-06 12:06:42,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 12:06:42,205 INFO L442 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-06 12:06:42,205 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 12:06:42,205 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-06 12:06:42,206 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-06 12:06:42,206 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-07-06 12:06:42,206 WARN L182 nStatisticsGenerator]: total relevant statements: 0 [2021-07-06 12:06:42,206 INFO L303 ceAbstractionStarter]: Result for error location mainErr11ENSURES_VIOLATIONMEMORY_LEAK was SAFE (12/12) [2021-07-06 12:06:42,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.07 12:06:42 BoogieIcfgContainer [2021-07-06 12:06:42,210 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-06 12:06:42,211 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-07-06 12:06:42,211 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-07-06 12:06:42,211 INFO L275 PluginConnector]: Witness Printer initialized [2021-07-06 12:06:42,211 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.07 12:06:39" (3/4) ... [2021-07-06 12:06:42,213 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-07-06 12:06:42,218 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-07-06 12:06:42,219 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-07-06 12:06:42,222 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-07-06 12:06:42,222 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-07-06 12:06:42,222 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-07-06 12:06:42,222 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-07-06 12:06:42,246 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-07-06 12:06:42,246 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-07-06 12:06:42,247 INFO L168 Benchmark]: Toolchain (without parser) took 2925.00 ms. Allocated memory was 58.7 MB in the beginning and 86.0 MB in the end (delta: 27.3 MB). Free memory was 36.9 MB in the beginning and 64.4 MB in the end (delta: -27.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-07-06 12:06:42,247 INFO L168 Benchmark]: CDTParser took 0.48 ms. Allocated memory is still 58.7 MB. Free memory is still 40.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-07-06 12:06:42,247 INFO L168 Benchmark]: CACSL2BoogieTranslator took 177.35 ms. Allocated memory is still 58.7 MB. Free memory was 36.7 MB in the beginning and 28.0 MB in the end (delta: 8.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-07-06 12:06:42,248 INFO L168 Benchmark]: Boogie Preprocessor took 51.29 ms. Allocated memory was 58.7 MB in the beginning and 71.3 MB in the end (delta: 12.6 MB). Free memory was 28.0 MB in the beginning and 54.9 MB in the end (delta: -26.9 MB). Peak memory consumption was 5.1 MB. Max. memory is 16.1 GB. [2021-07-06 12:06:42,248 INFO L168 Benchmark]: RCFGBuilder took 367.50 ms. Allocated memory is still 71.3 MB. Free memory was 54.9 MB in the beginning and 41.2 MB in the end (delta: 13.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-07-06 12:06:42,248 INFO L168 Benchmark]: TraceAbstraction took 2287.77 ms. Allocated memory was 71.3 MB in the beginning and 86.0 MB in the end (delta: 14.7 MB). Free memory was 40.8 MB in the beginning and 67.0 MB in the end (delta: -26.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-07-06 12:06:42,249 INFO L168 Benchmark]: Witness Printer took 35.60 ms. Allocated memory is still 86.0 MB. Free memory was 67.0 MB in the beginning and 64.4 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-07-06 12:06:42,250 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.48 ms. Allocated memory is still 58.7 MB. Free memory is still 40.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 177.35 ms. Allocated memory is still 58.7 MB. Free memory was 36.7 MB in the beginning and 28.0 MB in the end (delta: 8.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 51.29 ms. Allocated memory was 58.7 MB in the beginning and 71.3 MB in the end (delta: 12.6 MB). Free memory was 28.0 MB in the beginning and 54.9 MB in the end (delta: -26.9 MB). Peak memory consumption was 5.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 367.50 ms. Allocated memory is still 71.3 MB. Free memory was 54.9 MB in the beginning and 41.2 MB in the end (delta: 13.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2287.77 ms. Allocated memory was 71.3 MB in the beginning and 86.0 MB in the end (delta: 14.7 MB). Free memory was 40.8 MB in the beginning and 67.0 MB in the end (delta: -26.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 35.60 ms. Allocated memory is still 86.0 MB. Free memory was 67.0 MB in the beginning and 64.4 MB in the end (delta: 2.6 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 - 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: 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: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 17]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 17]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 17]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 17]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 19]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 19]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 19]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 13]: 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, 33 locations, 12 error locations. Started 1 CEGAR loops. OverallTime: 444.5ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 8.9ms, AutomataDifference: 148.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 13.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 15 SDtfs, 17 SDslu, 8 SDs, 0 SdLazy, 40 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 72.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred 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: 7.6ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 15.0ms SsaConstructionTime, 26.1ms SatisfiabilityAnalysisTime, 114.1ms 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, 33 locations, 12 error locations. Started 1 CEGAR loops. OverallTime: 256.2ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 1.1ms, AutomataDifference: 136.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 13 SDtfs, 20 SDslu, 8 SDs, 0 SdLazy, 39 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 85.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=0, InterpolantAutomatonStates: 5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 0.7ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 3.2ms SsaConstructionTime, 11.4ms SatisfiabilityAnalysisTime, 84.0ms 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, 33 locations, 12 error locations. Started 1 CEGAR loops. OverallTime: 141.4ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 1.0ms, AutomataDifference: 87.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 1.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 15 SDtfs, 15 SDslu, 8 SDs, 0 SdLazy, 40 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 65.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred 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: 0.9ms SsaConstructionTime, 5.1ms SatisfiabilityAnalysisTime, 38.8ms 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, 33 locations, 12 error locations. Started 1 CEGAR loops. OverallTime: 186.4ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 0.9ms, AutomataDifference: 93.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 1.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 13 SDtfs, 38 SDslu, 9 SDs, 0 SdLazy, 38 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 49.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 33.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=0, InterpolantAutomatonStates: 5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 0.7ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.0ms SsaConstructionTime, 10.9ms SatisfiabilityAnalysisTime, 69.6ms 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, 33 locations, 12 error locations. Started 1 CEGAR loops. OverallTime: 158.1ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 1.1ms, AutomataDifference: 96.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 1.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 15 SDtfs, 13 SDslu, 8 SDs, 0 SdLazy, 40 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 71.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred 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: 0.7ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.0ms SsaConstructionTime, 4.8ms SatisfiabilityAnalysisTime, 46.7ms 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, 33 locations, 12 error locations. Started 1 CEGAR loops. OverallTime: 137.8ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 4.4ms, AutomataDifference: 59.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 1.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 13 SDtfs, 36 SDslu, 9 SDs, 0 SdLazy, 38 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 31.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 31.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=0, InterpolantAutomatonStates: 5, 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: 0.7ms SsaConstructionTime, 4.1ms SatisfiabilityAnalysisTime, 55.0ms 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, 33 locations, 12 error locations. Started 1 CEGAR loops. OverallTime: 131.9ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 1.1ms, AutomataDifference: 55.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 0.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 15 SDtfs, 11 SDslu, 8 SDs, 0 SdLazy, 40 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 35.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred 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: 0.7ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.9ms SsaConstructionTime, 11.4ms SatisfiabilityAnalysisTime, 53.7ms InterpolantComputationTime, 13 NumberOfCodeBlocks, 13 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 12 ConstructedInterpolants, 0 QuantifiedInterpolants, 45 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, 33 locations, 12 error locations. Started 1 CEGAR loops. OverallTime: 114.8ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 1.1ms, AutomataDifference: 60.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 1.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 13 SDtfs, 34 SDslu, 9 SDs, 0 SdLazy, 38 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 31.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 28.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=0, InterpolantAutomatonStates: 5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 0.7ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.0ms SsaConstructionTime, 4.7ms SatisfiabilityAnalysisTime, 37.6ms InterpolantComputationTime, 13 NumberOfCodeBlocks, 13 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 12 ConstructedInterpolants, 0 QuantifiedInterpolants, 83 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: mainErr8ASSERT_VIOLATIONMEMORY_FREE CFG has 3 procedures, 33 locations, 12 error locations. Started 1 CEGAR loops. OverallTime: 188.1ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 1.7ms, AutomataDifference: 78.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 3.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 40 SDtfs, 5 SDslu, 9 SDs, 0 SdLazy, 47 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 38.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred 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: 10.2ms AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 7.5ms SsaConstructionTime, 15.4ms SatisfiabilityAnalysisTime, 55.6ms InterpolantComputationTime, 21 NumberOfCodeBlocks, 21 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 19 ConstructedInterpolants, 0 QuantifiedInterpolants, 47 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 - StatisticsResult: Ultimate Automizer benchmark data for error location: mainErr9ASSERT_VIOLATIONMEMORY_FREE CFG has 3 procedures, 33 locations, 12 error locations. Started 1 CEGAR loops. OverallTime: 156.7ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 2.2ms, AutomataDifference: 73.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 0.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 41 SDtfs, 5 SDslu, 9 SDs, 0 SdLazy, 48 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 42.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred 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: 5.5ms AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.6ms SsaConstructionTime, 20.1ms SatisfiabilityAnalysisTime, 40.6ms InterpolantComputationTime, 23 NumberOfCodeBlocks, 23 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 21 ConstructedInterpolants, 0 QuantifiedInterpolants, 63 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 - StatisticsResult: Ultimate Automizer benchmark data for error location: mainErr10ASSERT_VIOLATIONMEMORY_FREE CFG has 3 procedures, 33 locations, 12 error locations. Started 1 CEGAR loops. OverallTime: 159.8ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 1.9ms, AutomataDifference: 68.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 0.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 41 SDtfs, 5 SDslu, 9 SDs, 0 SdLazy, 50 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 43.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred 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: 5.2ms AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 4.1ms SsaConstructionTime, 12.1ms SatisfiabilityAnalysisTime, 52.1ms InterpolantComputationTime, 25 NumberOfCodeBlocks, 25 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 23 ConstructedInterpolants, 0 QuantifiedInterpolants, 65 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 - StatisticsResult: Ultimate Automizer benchmark data for error location: mainErr11ENSURES_VIOLATIONMEMORY_LEAK CFG has 3 procedures, 33 locations, 12 error locations. Started 1 CEGAR loops. OverallTime: 144.7ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 4.1ms, AutomataDifference: 67.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 1.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 41 SDtfs, 5 SDslu, 13 SDs, 0 SdLazy, 47 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 35.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=0, InterpolantAutomatonStates: 8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 2.3ms AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.4ms SsaConstructionTime, 8.7ms SatisfiabilityAnalysisTime, 46.6ms InterpolantComputationTime, 27 NumberOfCodeBlocks, 27 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 25 ConstructedInterpolants, 0 QuantifiedInterpolants, 82 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 12 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-07-06 12:06:42,308 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...