./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 5fbdf5bf 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/ldv-memsafety/ArraysOfVariableLength6.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-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 32bit --witnessprinter.graph.data.programhash 07b05923cf5c1b39a35ab81b524575a0a488c268 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-30 17:39:50,049 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-30 17:39:50,052 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-30 17:39:50,077 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-30 17:39:50,077 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-30 17:39:50,078 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-30 17:39:50,079 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-30 17:39:50,081 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-30 17:39:50,083 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-30 17:39:50,096 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-30 17:39:50,097 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-30 17:39:50,101 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-30 17:39:50,101 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-30 17:39:50,102 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-30 17:39:50,103 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-30 17:39:50,104 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-30 17:39:50,105 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-30 17:39:50,106 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-30 17:39:50,107 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-30 17:39:50,109 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-30 17:39:50,110 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-30 17:39:50,114 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-30 17:39:50,116 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-30 17:39:50,118 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-30 17:39:50,128 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-30 17:39:50,129 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-30 17:39:50,129 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-30 17:39:50,130 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-30 17:39:50,130 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-30 17:39:50,131 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-30 17:39:50,131 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-30 17:39:50,131 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-30 17:39:50,132 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-30 17:39:50,133 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-30 17:39:50,134 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-30 17:39:50,134 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-30 17:39:50,134 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-30 17:39:50,135 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-30 17:39:50,135 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-30 17:39:50,136 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-30 17:39:50,136 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-30 17:39:50,141 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-08-30 17:39:50,175 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-30 17:39:50,176 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-30 17:39:50,176 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-30 17:39:50,177 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-30 17:39:50,178 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-30 17:39:50,178 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-30 17:39:50,178 INFO L138 SettingsManager]: * Use SBE=true [2021-08-30 17:39:50,179 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-30 17:39:50,179 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-30 17:39:50,179 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-30 17:39:50,180 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-30 17:39:50,180 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-30 17:39:50,180 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-30 17:39:50,181 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-30 17:39:50,181 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-30 17:39:50,181 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-30 17:39:50,181 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-30 17:39:50,181 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-30 17:39:50,181 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-30 17:39:50,182 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-30 17:39:50,182 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-30 17:39:50,182 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-30 17:39:50,182 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-30 17:39:50,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-30 17:39:50,182 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-30 17:39:50,183 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-30 17:39:50,183 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-30 17:39:50,183 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-30 17:39:50,183 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-30 17:39:50,183 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 07b05923cf5c1b39a35ab81b524575a0a488c268 [2021-08-30 17:39:50,492 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-30 17:39:50,514 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-30 17:39:50,516 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-30 17:39:50,517 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-30 17:39:50,518 INFO L275 PluginConnector]: CDTParser initialized [2021-08-30 17:39:50,519 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.c [2021-08-30 17:39:50,576 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed9efe9a1/863c605aef2b439ba2f33ad19baf501e/FLAG3f6bc88d7 [2021-08-30 17:39:51,003 INFO L306 CDTParser]: Found 1 translation units. [2021-08-30 17:39:51,004 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.c [2021-08-30 17:39:51,008 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed9efe9a1/863c605aef2b439ba2f33ad19baf501e/FLAG3f6bc88d7 [2021-08-30 17:39:51,020 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed9efe9a1/863c605aef2b439ba2f33ad19baf501e [2021-08-30 17:39:51,022 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-30 17:39:51,024 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-30 17:39:51,025 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-30 17:39:51,025 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-30 17:39:51,028 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-30 17:39:51,028 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:39:51" (1/1) ... [2021-08-30 17:39:51,029 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52688c19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:39:51, skipping insertion in model container [2021-08-30 17:39:51,029 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:39:51" (1/1) ... [2021-08-30 17:39:51,036 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-30 17:39:51,045 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-30 17:39:51,166 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-30 17:39:51,172 INFO L203 MainTranslator]: Completed pre-run [2021-08-30 17:39:51,185 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-30 17:39:51,196 INFO L208 MainTranslator]: Completed translation [2021-08-30 17:39:51,196 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:39:51 WrapperNode [2021-08-30 17:39:51,196 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-30 17:39:51,197 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-30 17:39:51,197 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-30 17:39:51,198 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-30 17:39:51,239 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:39:51" (1/1) ... [2021-08-30 17:39:51,241 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:39:51" (1/1) ... [2021-08-30 17:39:51,255 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:39:51" (1/1) ... [2021-08-30 17:39:51,256 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:39:51" (1/1) ... [2021-08-30 17:39:51,271 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:39:51" (1/1) ... [2021-08-30 17:39:51,276 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:39:51" (1/1) ... [2021-08-30 17:39:51,281 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:39:51" (1/1) ... [2021-08-30 17:39:51,284 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-30 17:39:51,286 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-30 17:39:51,286 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-30 17:39:51,286 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-30 17:39:51,287 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:39:51" (1/1) ... [2021-08-30 17:39:51,293 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-30 17:39:51,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:39:51,318 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) [2021-08-30 17:39:51,340 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 [2021-08-30 17:39:51,353 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-30 17:39:51,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-30 17:39:51,354 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-08-30 17:39:51,354 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-30 17:39:51,354 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-08-30 17:39:51,354 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-30 17:39:51,354 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-30 17:39:51,355 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-30 17:39:51,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-30 17:39:51,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-30 17:39:51,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-30 17:39:51,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-30 17:39:51,522 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-30 17:39:51,522 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-08-30 17:39:51,524 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:39:51 BoogieIcfgContainer [2021-08-30 17:39:51,524 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-30 17:39:51,527 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-30 17:39:51,527 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-30 17:39:51,530 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-30 17:39:51,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 05:39:51" (1/3) ... [2021-08-30 17:39:51,531 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7992d919 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:39:51, skipping insertion in model container [2021-08-30 17:39:51,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:39:51" (2/3) ... [2021-08-30 17:39:51,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7992d919 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:39:51, skipping insertion in model container [2021-08-30 17:39:51,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:39:51" (3/3) ... [2021-08-30 17:39:51,533 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength6.c [2021-08-30 17:39:51,538 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-30 17:39:51,538 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2021-08-30 17:39:51,580 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-30 17:39:51,591 INFO L339 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, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-30 17:39:51,591 INFO L340 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-08-30 17:39:51,605 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 25 states have (on average 1.6) internal successors, (40), 33 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:39:51,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-30 17:39:51,613 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:39:51,613 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:39:51,614 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr2REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:39:51,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:39:51,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1909189377, now seen corresponding path program 1 times [2021-08-30 17:39:51,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:39:51,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777728514] [2021-08-30 17:39:51,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:51,645 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:39:51,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:51,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:39:51,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:51,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:39:51,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:39:51,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777728514] [2021-08-30 17:39:51,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777728514] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:39:51,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:39:51,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-30 17:39:51,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799157183] [2021-08-30 17:39:51,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-30 17:39:51,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:39:51,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-30 17:39:51,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 17:39:51,911 INFO L87 Difference]: Start difference. First operand has 40 states, 25 states have (on average 1.6) internal successors, (40), 33 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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) [2021-08-30 17:39:52,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:39:52,077 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2021-08-30 17:39:52,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-30 17:39:52,079 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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 [2021-08-30 17:39:52,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:39:52,089 INFO L225 Difference]: With dead ends: 58 [2021-08-30 17:39:52,089 INFO L226 Difference]: Without dead ends: 54 [2021-08-30 17:39:52,091 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.31ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-30 17:39:52,094 INFO L928 BasicCegarLoop]: 7 mSDtfsCounter, 27 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 99.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.50ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 128.12ms IncrementalHoareTripleChecker+Time [2021-08-30 17:39:52,095 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 14 Invalid, 106 Unknown, 0 Unchecked, 3.50ms Time], IncrementalHoareTripleChecker [7 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 128.12ms Time] [2021-08-30 17:39:52,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-08-30 17:39:52,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2021-08-30 17:39:52,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 33 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:39:52,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2021-08-30 17:39:52,149 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 10 [2021-08-30 17:39:52,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:39:52,150 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2021-08-30 17:39:52,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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) [2021-08-30 17:39:52,150 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2021-08-30 17:39:52,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-30 17:39:52,151 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:39:52,151 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:39:52,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-30 17:39:52,152 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:39:52,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:39:52,157 INFO L82 PathProgramCache]: Analyzing trace with hash -941983064, now seen corresponding path program 1 times [2021-08-30 17:39:52,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:39:52,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938813278] [2021-08-30 17:39:52,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:52,158 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:39:52,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:52,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:39:52,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:52,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:39:52,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:39:52,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938813278] [2021-08-30 17:39:52,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938813278] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:39:52,218 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:39:52,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-30 17:39:52,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97384384] [2021-08-30 17:39:52,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-30 17:39:52,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:39:52,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-30 17:39:52,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 17:39:52,221 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:39:52,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:39:52,317 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2021-08-30 17:39:52,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-30 17:39:52,317 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-08-30 17:39:52,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:39:52,319 INFO L225 Difference]: With dead ends: 49 [2021-08-30 17:39:52,320 INFO L226 Difference]: Without dead ends: 49 [2021-08-30 17:39:52,320 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.01ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-30 17:39:52,321 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 29 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 62.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.34ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 76.89ms IncrementalHoareTripleChecker+Time [2021-08-30 17:39:52,322 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 11 Invalid, 96 Unknown, 0 Unchecked, 1.34ms Time], IncrementalHoareTripleChecker [3 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 76.89ms Time] [2021-08-30 17:39:52,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-08-30 17:39:52,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2021-08-30 17:39:52,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 35 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:39:52,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2021-08-30 17:39:52,327 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 11 [2021-08-30 17:39:52,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:39:52,327 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2021-08-30 17:39:52,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:39:52,327 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2021-08-30 17:39:52,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-30 17:39:52,328 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:39:52,328 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:39:52,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-30 17:39:52,329 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting fooErr1REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:39:52,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:39:52,329 INFO L82 PathProgramCache]: Analyzing trace with hash 863296133, now seen corresponding path program 1 times [2021-08-30 17:39:52,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:39:52,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361647928] [2021-08-30 17:39:52,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:52,330 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:39:52,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:52,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:39:52,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:52,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:39:52,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:39:52,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361647928] [2021-08-30 17:39:52,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361647928] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:39:52,425 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:39:52,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-30 17:39:52,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284354814] [2021-08-30 17:39:52,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-30 17:39:52,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:39:52,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-30 17:39:52,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-30 17:39:52,427 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:39:52,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:39:52,578 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2021-08-30 17:39:52,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-30 17:39:52,578 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-08-30 17:39:52,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:39:52,580 INFO L225 Difference]: With dead ends: 40 [2021-08-30 17:39:52,580 INFO L226 Difference]: Without dead ends: 40 [2021-08-30 17:39:52,580 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 75.54ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-30 17:39:52,582 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 63 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 83.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.47ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 105.49ms IncrementalHoareTripleChecker+Time [2021-08-30 17:39:52,582 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 17 Invalid, 151 Unknown, 0 Unchecked, 2.47ms Time], IncrementalHoareTripleChecker [4 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 105.49ms Time] [2021-08-30 17:39:52,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-08-30 17:39:52,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-08-30 17:39:52,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 34 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:39:52,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2021-08-30 17:39:52,592 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 12 [2021-08-30 17:39:52,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:39:52,592 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2021-08-30 17:39:52,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:39:52,593 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2021-08-30 17:39:52,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-30 17:39:52,593 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:39:52,593 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:39:52,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-30 17:39:52,598 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting fooErr2REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:39:52,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:39:52,598 INFO L82 PathProgramCache]: Analyzing trace with hash 863296134, now seen corresponding path program 1 times [2021-08-30 17:39:52,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:39:52,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412409331] [2021-08-30 17:39:52,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:52,599 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:39:52,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:52,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:39:52,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:52,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:39:52,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:39:52,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412409331] [2021-08-30 17:39:52,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412409331] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:39:52,746 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:39:52,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-30 17:39:52,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10403396] [2021-08-30 17:39:52,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-30 17:39:52,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:39:52,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-30 17:39:52,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-30 17:39:52,749 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:39:52,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:39:52,895 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2021-08-30 17:39:52,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-30 17:39:52,896 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-08-30 17:39:52,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:39:52,897 INFO L225 Difference]: With dead ends: 46 [2021-08-30 17:39:52,897 INFO L226 Difference]: Without dead ends: 46 [2021-08-30 17:39:52,898 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 74.57ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-30 17:39:52,909 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 75 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 75.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.51ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 95.09ms IncrementalHoareTripleChecker+Time [2021-08-30 17:39:52,910 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 17 Invalid, 164 Unknown, 0 Unchecked, 4.51ms Time], IncrementalHoareTripleChecker [10 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 95.09ms Time] [2021-08-30 17:39:52,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-08-30 17:39:52,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2021-08-30 17:39:52,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 35 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:39:52,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2021-08-30 17:39:52,914 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 12 [2021-08-30 17:39:52,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:39:52,914 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2021-08-30 17:39:52,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:39:52,914 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2021-08-30 17:39:52,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-30 17:39:52,915 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:39:52,915 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:39:52,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-30 17:39:52,915 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:39:52,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:39:52,916 INFO L82 PathProgramCache]: Analyzing trace with hash 143250926, now seen corresponding path program 1 times [2021-08-30 17:39:52,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:39:52,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323872296] [2021-08-30 17:39:52,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:52,916 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:39:52,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:52,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:39:52,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:52,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:39:52,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:52,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:39:52,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:39:52,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323872296] [2021-08-30 17:39:52,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323872296] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:39:52,988 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:39:52,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-30 17:39:52,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544877457] [2021-08-30 17:39:52,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 17:39:52,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:39:52,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 17:39:52,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-30 17:39:52,989 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:39:53,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:39:53,100 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2021-08-30 17:39:53,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-30 17:39:53,100 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 15 [2021-08-30 17:39:53,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:39:53,101 INFO L225 Difference]: With dead ends: 46 [2021-08-30 17:39:53,101 INFO L226 Difference]: Without dead ends: 43 [2021-08-30 17:39:53,102 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.04ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-30 17:39:53,102 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 25 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 64.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.99ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 78.65ms IncrementalHoareTripleChecker+Time [2021-08-30 17:39:53,103 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 14 Invalid, 130 Unknown, 0 Unchecked, 0.99ms Time], IncrementalHoareTripleChecker [3 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 78.65ms Time] [2021-08-30 17:39:53,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-08-30 17:39:53,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2021-08-30 17:39:53,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 35 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:39:53,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2021-08-30 17:39:53,107 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 15 [2021-08-30 17:39:53,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:39:53,107 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2021-08-30 17:39:53,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:39:53,108 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2021-08-30 17:39:53,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-30 17:39:53,108 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:39:53,108 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:39:53,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-30 17:39:53,109 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:39:53,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:39:53,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1623425863, now seen corresponding path program 1 times [2021-08-30 17:39:53,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:39:53,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578384504] [2021-08-30 17:39:53,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:53,110 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:39:53,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:53,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:39:53,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:53,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:39:53,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:39:53,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578384504] [2021-08-30 17:39:53,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578384504] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:39:53,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21703716] [2021-08-30 17:39:53,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:53,151 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:39:53,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:39:53,153 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 17:39:53,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-30 17:39:53,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:53,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-30 17:39:53,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:39:53,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:39:53,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:39:53,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:39:53,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21703716] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:39:53,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 17:39:53,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 6 [2021-08-30 17:39:53,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762075325] [2021-08-30 17:39:53,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-30 17:39:53,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:39:53,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-30 17:39:53,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-30 17:39:53,373 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:39:53,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:39:53,521 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2021-08-30 17:39:53,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-30 17:39:53,521 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-08-30 17:39:53,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:39:53,523 INFO L225 Difference]: With dead ends: 66 [2021-08-30 17:39:53,523 INFO L226 Difference]: Without dead ends: 66 [2021-08-30 17:39:53,524 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 72.55ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-30 17:39:53,525 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 67 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 75.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.16ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 95.60ms IncrementalHoareTripleChecker+Time [2021-08-30 17:39:53,526 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 16 Invalid, 155 Unknown, 0 Unchecked, 1.16ms Time], IncrementalHoareTripleChecker [10 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 95.60ms Time] [2021-08-30 17:39:53,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-08-30 17:39:53,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 55. [2021-08-30 17:39:53,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 49 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:39:53,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2021-08-30 17:39:53,542 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 16 [2021-08-30 17:39:53,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:39:53,542 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2021-08-30 17:39:53,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:39:53,543 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2021-08-30 17:39:53,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-30 17:39:53,544 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:39:53,544 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:39:53,571 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-30 17:39:53,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-08-30 17:39:53,761 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting fooErr2REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:39:53,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:39:53,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1213405753, now seen corresponding path program 1 times [2021-08-30 17:39:53,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:39:53,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893073950] [2021-08-30 17:39:53,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:53,762 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:39:53,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:53,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:39:53,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:53,871 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-30 17:39:53,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:39:53,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893073950] [2021-08-30 17:39:53,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893073950] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:39:53,872 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:39:53,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-30 17:39:53,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817295511] [2021-08-30 17:39:53,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-30 17:39:53,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:39:53,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-30 17:39:53,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-30 17:39:53,873 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:39:54,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:39:54,016 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2021-08-30 17:39:54,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-30 17:39:54,021 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-08-30 17:39:54,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:39:54,023 INFO L225 Difference]: With dead ends: 54 [2021-08-30 17:39:54,023 INFO L226 Difference]: Without dead ends: 54 [2021-08-30 17:39:54,024 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 97.22ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-08-30 17:39:54,024 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 63 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 68.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.37ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 83.61ms IncrementalHoareTripleChecker+Time [2021-08-30 17:39:54,025 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 17 Invalid, 156 Unknown, 0 Unchecked, 1.37ms Time], IncrementalHoareTripleChecker [9 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 83.61ms Time] [2021-08-30 17:39:54,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-08-30 17:39:54,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-08-30 17:39:54,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 43 states have (on average 1.2790697674418605) internal successors, (55), 48 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:39:54,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2021-08-30 17:39:54,037 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 17 [2021-08-30 17:39:54,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:39:54,038 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2021-08-30 17:39:54,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:39:54,038 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2021-08-30 17:39:54,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-30 17:39:54,039 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:39:54,039 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:39:54,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-30 17:39:54,039 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:39:54,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:39:54,039 INFO L82 PathProgramCache]: Analyzing trace with hash 2121234189, now seen corresponding path program 1 times [2021-08-30 17:39:54,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:39:54,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816397299] [2021-08-30 17:39:54,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:54,040 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:39:54,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:54,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:39:54,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:54,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:39:54,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:54,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:39:54,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:39:54,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816397299] [2021-08-30 17:39:54,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816397299] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:39:54,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454180715] [2021-08-30 17:39:54,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:54,131 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:39:54,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:39:54,132 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 17:39:54,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-30 17:39:54,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:54,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-30 17:39:54,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:39:54,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:39:54,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:39:54,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:39:54,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454180715] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:39:54,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 17:39:54,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2021-08-30 17:39:54,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045022673] [2021-08-30 17:39:54,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-30 17:39:54,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:39:54,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-30 17:39:54,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-08-30 17:39:54,442 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 1 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-08-30 17:39:54,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:39:54,692 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2021-08-30 17:39:54,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-30 17:39:54,693 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 1 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 20 [2021-08-30 17:39:54,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:39:54,693 INFO L225 Difference]: With dead ends: 60 [2021-08-30 17:39:54,693 INFO L226 Difference]: Without dead ends: 54 [2021-08-30 17:39:54,693 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 190.94ms TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-08-30 17:39:54,694 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 73 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 92.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.08ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 120.73ms IncrementalHoareTripleChecker+Time [2021-08-30 17:39:54,694 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 26 Invalid, 253 Unknown, 0 Unchecked, 2.08ms Time], IncrementalHoareTripleChecker [16 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 120.73ms Time] [2021-08-30 17:39:54,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-08-30 17:39:54,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-08-30 17:39:54,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 48 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:39:54,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2021-08-30 17:39:54,697 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 20 [2021-08-30 17:39:54,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:39:54,701 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2021-08-30 17:39:54,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 1 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-08-30 17:39:54,701 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2021-08-30 17:39:54,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-30 17:39:54,702 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:39:54,702 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:39:54,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-30 17:39:54,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-08-30 17:39:54,909 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:39:54,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:39:54,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1856317080, now seen corresponding path program 2 times [2021-08-30 17:39:54,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:39:54,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248535358] [2021-08-30 17:39:54,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:54,910 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:39:54,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:55,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:39:55,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:55,004 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:39:55,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:39:55,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248535358] [2021-08-30 17:39:55,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248535358] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:39:55,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095156726] [2021-08-30 17:39:55,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 17:39:55,009 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:39:55,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:39:55,010 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 17:39:55,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-30 17:39:55,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-30 17:39:55,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 17:39:55,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-30 17:39:55,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:39:55,241 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 34 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:39:55,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:39:55,649 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 30 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:39:55,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095156726] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:39:55,650 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 17:39:55,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 20 [2021-08-30 17:39:55,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727305573] [2021-08-30 17:39:55,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-30 17:39:55,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:39:55,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-30 17:39:55,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-08-30 17:39:55,651 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 21 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 1 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:39:55,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:39:55,940 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2021-08-30 17:39:55,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-30 17:39:55,941 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 1 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2021-08-30 17:39:55,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:39:55,942 INFO L225 Difference]: With dead ends: 68 [2021-08-30 17:39:55,942 INFO L226 Difference]: Without dead ends: 68 [2021-08-30 17:39:55,942 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 277.04ms TimeCoverageRelationStatistics Valid=209, Invalid=603, Unknown=0, NotChecked=0, Total=812 [2021-08-30 17:39:55,943 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 143 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 148.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.31ms SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 179.02ms IncrementalHoareTripleChecker+Time [2021-08-30 17:39:55,943 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 32 Invalid, 443 Unknown, 0 Unchecked, 2.31ms Time], IncrementalHoareTripleChecker [35 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 179.02ms Time] [2021-08-30 17:39:55,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-08-30 17:39:55,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 52. [2021-08-30 17:39:55,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 46 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:39:55,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2021-08-30 17:39:55,946 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 31 [2021-08-30 17:39:55,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:39:55,946 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2021-08-30 17:39:55,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 1 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:39:55,946 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2021-08-30 17:39:55,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-30 17:39:55,947 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:39:55,947 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:39:55,970 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-08-30 17:39:56,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:39:56,148 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:39:56,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:39:56,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1228723374, now seen corresponding path program 2 times [2021-08-30 17:39:56,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:39:56,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720348748] [2021-08-30 17:39:56,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:56,149 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:39:56,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:56,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:39:56,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:56,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:39:56,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:56,286 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:39:56,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:39:56,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720348748] [2021-08-30 17:39:56,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720348748] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:39:56,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79880040] [2021-08-30 17:39:56,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 17:39:56,287 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:39:56,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:39:56,288 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 17:39:56,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-30 17:39:56,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-08-30 17:39:56,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 17:39:56,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-30 17:39:56,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:39:56,363 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-30 17:39:56,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2021-08-30 17:39:56,505 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-08-30 17:39:56,505 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-30 17:39:56,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79880040] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:39:56,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-30 17:39:56,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 11 [2021-08-30 17:39:56,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868195100] [2021-08-30 17:39:56,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-30 17:39:56,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:39:56,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-30 17:39:56,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-30 17:39:56,507 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:39:56,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:39:56,525 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2021-08-30 17:39:56,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-30 17:39:56,526 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2021-08-30 17:39:56,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:39:56,526 INFO L225 Difference]: With dead ends: 50 [2021-08-30 17:39:56,526 INFO L226 Difference]: Without dead ends: 50 [2021-08-30 17:39:56,526 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 85.01ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-30 17:39:56,527 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 15 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.28ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 16.55ms IncrementalHoareTripleChecker+Time [2021-08-30 17:39:56,527 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 10 Invalid, 44 Unknown, 0 Unchecked, 0.28ms Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 16 Unchecked, 16.55ms Time] [2021-08-30 17:39:56,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-08-30 17:39:56,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-08-30 17:39:56,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 44 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:39:56,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2021-08-30 17:39:56,530 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 35 [2021-08-30 17:39:56,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:39:56,530 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2021-08-30 17:39:56,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:39:56,530 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2021-08-30 17:39:56,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-30 17:39:56,531 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:39:56,531 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:39:56,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-30 17:39:56,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:39:56,753 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr1REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:39:56,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:39:56,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1228723375, now seen corresponding path program 1 times [2021-08-30 17:39:56,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:39:56,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833411416] [2021-08-30 17:39:56,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:56,754 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:39:56,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:56,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:39:56,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:56,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:39:56,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:56,902 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:39:56,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:39:56,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833411416] [2021-08-30 17:39:56,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833411416] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:39:56,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760744422] [2021-08-30 17:39:56,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:56,903 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:39:56,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:39:56,913 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 17:39:56,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-30 17:39:56,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:56,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-30 17:39:56,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:39:57,145 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:39:57,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:39:57,379 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:39:57,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760744422] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:39:57,380 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 17:39:57,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2021-08-30 17:39:57,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096332604] [2021-08-30 17:39:57,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-30 17:39:57,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:39:57,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-30 17:39:57,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-08-30 17:39:57,381 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 20 states have internal predecessors, (79), 1 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-08-30 17:39:57,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:39:57,836 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2021-08-30 17:39:57,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-30 17:39:57,837 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 20 states have internal predecessors, (79), 1 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 35 [2021-08-30 17:39:57,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:39:57,838 INFO L225 Difference]: With dead ends: 86 [2021-08-30 17:39:57,838 INFO L226 Difference]: Without dead ends: 80 [2021-08-30 17:39:57,838 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 452.75ms TimeCoverageRelationStatistics Valid=291, Invalid=765, Unknown=0, NotChecked=0, Total=1056 [2021-08-30 17:39:57,839 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 132 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 156.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.35ms SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 186.87ms IncrementalHoareTripleChecker+Time [2021-08-30 17:39:57,839 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 38 Invalid, 380 Unknown, 0 Unchecked, 2.35ms Time], IncrementalHoareTripleChecker [33 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 186.87ms Time] [2021-08-30 17:39:57,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-08-30 17:39:57,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-08-30 17:39:57,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 72 states have (on average 1.0833333333333333) internal successors, (78), 74 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:39:57,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2021-08-30 17:39:57,842 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 35 [2021-08-30 17:39:57,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:39:57,842 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2021-08-30 17:39:57,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 20 states have internal predecessors, (79), 1 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-08-30 17:39:57,843 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2021-08-30 17:39:57,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-30 17:39:57,844 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:39:57,844 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:39:57,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-30 17:39:58,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-30 17:39:58,053 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr1REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:39:58,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:39:58,053 INFO L82 PathProgramCache]: Analyzing trace with hash 576253647, now seen corresponding path program 2 times [2021-08-30 17:39:58,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:39:58,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077646182] [2021-08-30 17:39:58,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:58,054 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:39:58,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:58,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:39:58,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:58,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:39:58,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:58,367 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:39:58,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:39:58,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077646182] [2021-08-30 17:39:58,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077646182] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:39:58,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262037940] [2021-08-30 17:39:58,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 17:39:58,367 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:39:58,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:39:58,368 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 17:39:58,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-30 17:39:58,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-08-30 17:39:58,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 17:39:58,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-30 17:39:58,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:39:58,445 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-30 17:39:58,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-08-30 17:39:58,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-08-30 17:39:58,849 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-08-30 17:39:58,850 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-30 17:39:58,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262037940] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:39:58,850 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-30 17:39:58,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [15] total 17 [2021-08-30 17:39:58,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904381362] [2021-08-30 17:39:58,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-30 17:39:58,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:39:58,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-30 17:39:58,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-08-30 17:39:58,852 INFO L87 Difference]: Start difference. First operand 80 states and 83 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:39:58,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:39:58,868 INFO L93 Difference]: Finished difference Result 138 states and 142 transitions. [2021-08-30 17:39:58,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-30 17:39:58,868 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 65 [2021-08-30 17:39:58,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:39:58,869 INFO L225 Difference]: With dead ends: 138 [2021-08-30 17:39:58,870 INFO L226 Difference]: Without dead ends: 138 [2021-08-30 17:39:58,870 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 191.12ms TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-08-30 17:39:58,870 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.25ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 13.61ms IncrementalHoareTripleChecker+Time [2021-08-30 17:39:58,871 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 50 Unknown, 0 Unchecked, 0.25ms Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 32 Unchecked, 13.61ms Time] [2021-08-30 17:39:58,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-08-30 17:39:58,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2021-08-30 17:39:58,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 128 states have (on average 1.0546875) internal successors, (135), 130 states have internal predecessors, (135), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:39:58,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2021-08-30 17:39:58,875 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 65 [2021-08-30 17:39:58,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:39:58,875 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2021-08-30 17:39:58,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:39:58,876 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2021-08-30 17:39:58,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-08-30 17:39:58,877 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:39:58,877 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:39:58,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-30 17:39:59,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:39:59,097 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr3REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:39:59,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:39:59,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1339016000, now seen corresponding path program 1 times [2021-08-30 17:39:59,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:39:59,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656697687] [2021-08-30 17:39:59,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:59,098 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:39:59,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:59,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:39:59,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:59,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:39:59,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:59,149 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-08-30 17:39:59,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:39:59,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656697687] [2021-08-30 17:39:59,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656697687] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:39:59,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906642726] [2021-08-30 17:39:59,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:59,150 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:39:59,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:39:59,165 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 17:39:59,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-30 17:39:59,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:59,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-30 17:39:59,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:39:59,584 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 1 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:39:59,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:40:00,147 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 1 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:40:00,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906642726] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:40:00,147 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 17:40:00,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 14, 14] total 29 [2021-08-30 17:40:00,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382260054] [2021-08-30 17:40:00,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-30 17:40:00,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:40:00,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-30 17:40:00,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=502, Unknown=0, NotChecked=0, Total=812 [2021-08-30 17:40:00,149 INFO L87 Difference]: Start difference. First operand 138 states and 142 transitions. Second operand has 29 states, 29 states have (on average 4.724137931034483) internal successors, (137), 28 states have internal predecessors, (137), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-30 17:40:00,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:40:00,850 INFO L93 Difference]: Finished difference Result 294 states and 319 transitions. [2021-08-30 17:40:00,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-30 17:40:00,850 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.724137931034483) internal successors, (137), 28 states have internal predecessors, (137), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 71 [2021-08-30 17:40:00,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:40:00,852 INFO L225 Difference]: With dead ends: 294 [2021-08-30 17:40:00,852 INFO L226 Difference]: Without dead ends: 282 [2021-08-30 17:40:00,853 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 762.22ms TimeCoverageRelationStatistics Valid=916, Invalid=1840, Unknown=0, NotChecked=0, Total=2756 [2021-08-30 17:40:00,854 INFO L928 BasicCegarLoop]: 7 mSDtfsCounter, 294 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 212.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.78ms SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 256.42ms IncrementalHoareTripleChecker+Time [2021-08-30 17:40:00,854 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 42 Invalid, 398 Unknown, 0 Unchecked, 2.78ms Time], IncrementalHoareTripleChecker [66 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 256.42ms Time] [2021-08-30 17:40:00,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-08-30 17:40:00,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 265. [2021-08-30 17:40:00,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 255 states have (on average 1.035294117647059) internal successors, (264), 257 states have internal predecessors, (264), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:40:00,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 271 transitions. [2021-08-30 17:40:00,859 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 271 transitions. Word has length 71 [2021-08-30 17:40:00,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:40:00,859 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 271 transitions. [2021-08-30 17:40:00,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.724137931034483) internal successors, (137), 28 states have internal predecessors, (137), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-30 17:40:00,859 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 271 transitions. [2021-08-30 17:40:00,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-08-30 17:40:00,862 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:40:00,862 INFO L513 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:40:00,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-30 17:40:01,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:40:01,081 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr1REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:40:01,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:40:01,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1414018991, now seen corresponding path program 1 times [2021-08-30 17:40:01,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:40:01,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84399333] [2021-08-30 17:40:01,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:40:01,082 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:40:01,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:01,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:40:01,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:01,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:40:01,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:01,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-08-30 17:40:01,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:01,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4827 backedges. 2 proven. 3645 refuted. 0 times theorem prover too weak. 1180 trivial. 0 not checked. [2021-08-30 17:40:01,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:40:01,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84399333] [2021-08-30 17:40:01,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84399333] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:40:01,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28316442] [2021-08-30 17:40:01,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:40:01,850 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:40:01,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:40:01,851 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 17:40:01,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-30 17:40:01,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:01,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-30 17:40:01,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:40:03,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4827 backedges. 2471 proven. 1177 refuted. 0 times theorem prover too weak. 1179 trivial. 0 not checked. [2021-08-30 17:40:03,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:40:05,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4827 backedges. 2 proven. 3645 refuted. 0 times theorem prover too weak. 1180 trivial. 0 not checked. [2021-08-30 17:40:05,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28316442] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:40:05,082 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 17:40:05,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 75 [2021-08-30 17:40:05,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811319876] [2021-08-30 17:40:05,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-08-30 17:40:05,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:40:05,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-08-30 17:40:05,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1393, Invalid=4157, Unknown=0, NotChecked=0, Total=5550 [2021-08-30 17:40:05,087 INFO L87 Difference]: Start difference. First operand 265 states and 271 transitions. Second operand has 75 states, 75 states have (on average 4.946666666666666) internal successors, (371), 74 states have internal predecessors, (371), 2 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-08-30 17:40:06,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:40:06,843 INFO L93 Difference]: Finished difference Result 377 states and 399 transitions. [2021-08-30 17:40:06,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-30 17:40:06,844 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 4.946666666666666) internal successors, (371), 74 states have internal predecessors, (371), 2 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 246 [2021-08-30 17:40:06,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:40:06,845 INFO L225 Difference]: With dead ends: 377 [2021-08-30 17:40:06,845 INFO L226 Difference]: Without dead ends: 365 [2021-08-30 17:40:06,848 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 556 GetRequests, 449 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2325 ImplicationChecksByTransitivity, 3190.51ms TimeCoverageRelationStatistics Valid=3121, Invalid=8651, Unknown=0, NotChecked=0, Total=11772 [2021-08-30 17:40:06,849 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 390 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 334.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.18ms SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 393.19ms IncrementalHoareTripleChecker+Time [2021-08-30 17:40:06,849 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 46 Invalid, 725 Unknown, 0 Unchecked, 4.18ms Time], IncrementalHoareTripleChecker [87 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 393.19ms Time] [2021-08-30 17:40:06,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-08-30 17:40:06,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 365. [2021-08-30 17:40:06,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 355 states have (on average 1.0253521126760563) internal successors, (364), 357 states have internal predecessors, (364), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:40:06,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 371 transitions. [2021-08-30 17:40:06,855 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 371 transitions. Word has length 246 [2021-08-30 17:40:06,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:40:06,855 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 371 transitions. [2021-08-30 17:40:06,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 4.946666666666666) internal successors, (371), 74 states have internal predecessors, (371), 2 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-08-30 17:40:06,855 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 371 transitions. [2021-08-30 17:40:06,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2021-08-30 17:40:06,862 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:40:06,862 INFO L513 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 64, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:40:06,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-30 17:40:07,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-30 17:40:07,078 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr1REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:40:07,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:40:07,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1912051759, now seen corresponding path program 2 times [2021-08-30 17:40:07,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:40:07,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681050700] [2021-08-30 17:40:07,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:40:07,079 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:40:07,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:07,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:40:07,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:07,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:40:07,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:07,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2021-08-30 17:40:07,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:07,318 INFO L134 CoverageAnalysis]: Checked inductivity of 10217 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10213 trivial. 0 not checked. [2021-08-30 17:40:07,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:40:07,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681050700] [2021-08-30 17:40:07,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681050700] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:40:07,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898083019] [2021-08-30 17:40:07,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 17:40:07,319 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:40:07,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:40:07,321 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 17:40:07,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-30 17:40:07,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-30 17:40:07,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 17:40:07,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 879 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-30 17:40:07,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:40:07,512 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 17:40:07,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-08-30 17:40:07,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-08-30 17:40:09,225 INFO L134 CoverageAnalysis]: Checked inductivity of 10217 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10213 trivial. 0 not checked. [2021-08-30 17:40:09,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:40:09,700 INFO L134 CoverageAnalysis]: Checked inductivity of 10217 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10213 trivial. 0 not checked. [2021-08-30 17:40:09,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898083019] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:40:09,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 17:40:09,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 3] total 12 [2021-08-30 17:40:09,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632523087] [2021-08-30 17:40:09,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-30 17:40:09,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:40:09,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-30 17:40:09,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-08-30 17:40:09,702 INFO L87 Difference]: Start difference. First operand 365 states and 371 transitions. Second operand has 13 states, 11 states have (on average 4.363636363636363) internal successors, (48), 12 states have internal predecessors, (48), 7 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-08-30 17:40:09,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:40:09,822 INFO L93 Difference]: Finished difference Result 540 states and 549 transitions. [2021-08-30 17:40:09,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-30 17:40:09,822 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 4.363636363636363) internal successors, (48), 12 states have internal predecessors, (48), 7 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 346 [2021-08-30 17:40:09,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:40:09,824 INFO L225 Difference]: With dead ends: 540 [2021-08-30 17:40:09,824 INFO L226 Difference]: Without dead ends: 540 [2021-08-30 17:40:09,824 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 706 GetRequests, 689 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 190.56ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-08-30 17:40:09,825 INFO L928 BasicCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.68ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 43.38ms IncrementalHoareTripleChecker+Time [2021-08-30 17:40:09,825 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 23 Invalid, 150 Unknown, 0 Unchecked, 0.68ms Time], IncrementalHoareTripleChecker [6 Valid, 90 Invalid, 0 Unknown, 54 Unchecked, 43.38ms Time] [2021-08-30 17:40:09,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-08-30 17:40:09,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 539. [2021-08-30 17:40:09,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 526 states have (on average 1.020912547528517) internal successors, (537), 528 states have internal predecessors, (537), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-30 17:40:09,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 548 transitions. [2021-08-30 17:40:09,833 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 548 transitions. Word has length 346 [2021-08-30 17:40:09,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:40:09,834 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 548 transitions. [2021-08-30 17:40:09,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 4.363636363636363) internal successors, (48), 12 states have internal predecessors, (48), 7 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-08-30 17:40:09,834 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 548 transitions. [2021-08-30 17:40:09,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2021-08-30 17:40:09,838 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:40:09,838 INFO L513 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 64, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:40:09,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-30 17:40:10,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-30 17:40:10,052 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr3REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:40:10,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:40:10,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1737659326, now seen corresponding path program 2 times [2021-08-30 17:40:10,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:40:10,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415684467] [2021-08-30 17:40:10,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:40:10,053 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:40:10,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:10,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:40:10,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:10,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:40:10,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:10,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2021-08-30 17:40:10,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:10,229 INFO L134 CoverageAnalysis]: Checked inductivity of 10221 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10214 trivial. 0 not checked. [2021-08-30 17:40:10,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:40:10,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415684467] [2021-08-30 17:40:10,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415684467] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:40:10,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97133765] [2021-08-30 17:40:10,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 17:40:10,230 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:40:10,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:40:10,233 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 17:40:10,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-30 17:40:10,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-08-30 17:40:10,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 17:40:10,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-30 17:40:10,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:40:10,321 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-30 17:40:10,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-08-30 17:40:10,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-08-30 17:40:11,902 INFO L134 CoverageAnalysis]: Checked inductivity of 10221 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10221 trivial. 0 not checked. [2021-08-30 17:40:11,904 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-30 17:40:11,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97133765] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:40:11,905 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-30 17:40:11,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2021-08-30 17:40:11,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496971909] [2021-08-30 17:40:11,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 17:40:11,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:40:11,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 17:40:11,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-30 17:40:11,907 INFO L87 Difference]: Start difference. First operand 539 states and 548 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:40:11,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:40:11,919 INFO L93 Difference]: Finished difference Result 539 states and 547 transitions. [2021-08-30 17:40:11,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-30 17:40:11,919 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 352 [2021-08-30 17:40:11,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:40:11,921 INFO L225 Difference]: With dead ends: 539 [2021-08-30 17:40:11,922 INFO L226 Difference]: Without dead ends: 539 [2021-08-30 17:40:11,922 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 351 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 58.60ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-30 17:40:11,922 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.17ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 8.02ms IncrementalHoareTripleChecker+Time [2021-08-30 17:40:11,923 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 53 Unknown, 0 Unchecked, 0.17ms Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 42 Unchecked, 8.02ms Time] [2021-08-30 17:40:11,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-08-30 17:40:11,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 539. [2021-08-30 17:40:11,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 526 states have (on average 1.0190114068441065) internal successors, (536), 528 states have internal predecessors, (536), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-30 17:40:11,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 547 transitions. [2021-08-30 17:40:11,931 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 547 transitions. Word has length 352 [2021-08-30 17:40:11,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:40:11,932 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 547 transitions. [2021-08-30 17:40:11,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:40:11,932 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 547 transitions. [2021-08-30 17:40:11,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2021-08-30 17:40:11,936 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:40:11,936 INFO L513 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 64, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:40:11,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-30 17:40:12,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-30 17:40:12,159 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr4ENSURES_VIOLATIONMEMORY_LEAK === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:40:12,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:40:12,159 INFO L82 PathProgramCache]: Analyzing trace with hash 631838886, now seen corresponding path program 1 times [2021-08-30 17:40:12,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:40:12,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194046787] [2021-08-30 17:40:12,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:40:12,160 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:40:12,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:12,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:40:12,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:12,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:40:12,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:12,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2021-08-30 17:40:12,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:12,338 INFO L134 CoverageAnalysis]: Checked inductivity of 10221 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10213 trivial. 0 not checked. [2021-08-30 17:40:12,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:40:12,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194046787] [2021-08-30 17:40:12,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194046787] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:40:12,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940525974] [2021-08-30 17:40:12,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:40:12,340 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:40:12,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:40:12,341 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 17:40:12,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-30 17:40:12,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:12,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-30 17:40:12,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:40:13,082 INFO L134 CoverageAnalysis]: Checked inductivity of 10221 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10213 trivial. 0 not checked. [2021-08-30 17:40:13,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:40:13,523 INFO L134 CoverageAnalysis]: Checked inductivity of 10221 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10213 trivial. 0 not checked. [2021-08-30 17:40:13,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940525974] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:40:13,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 17:40:13,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2021-08-30 17:40:13,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564981694] [2021-08-30 17:40:13,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-30 17:40:13,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:40:13,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-30 17:40:13,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-30 17:40:13,525 INFO L87 Difference]: Start difference. First operand 539 states and 547 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-08-30 17:40:13,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:40:13,706 INFO L93 Difference]: Finished difference Result 593 states and 600 transitions. [2021-08-30 17:40:13,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-30 17:40:13,707 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 355 [2021-08-30 17:40:13,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:40:13,709 INFO L225 Difference]: With dead ends: 593 [2021-08-30 17:40:13,710 INFO L226 Difference]: Without dead ends: 593 [2021-08-30 17:40:13,710 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 720 GetRequests, 712 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 42.82ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-30 17:40:13,710 INFO L928 BasicCegarLoop]: 10 mSDtfsCounter, 85 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 140.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.87ms SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 169.84ms IncrementalHoareTripleChecker+Time [2021-08-30 17:40:13,711 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 31 Invalid, 257 Unknown, 0 Unchecked, 1.87ms Time], IncrementalHoareTripleChecker [28 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 169.84ms Time] [2021-08-30 17:40:13,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-08-30 17:40:13,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 570. [2021-08-30 17:40:13,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 555 states have (on average 1.0342342342342343) internal successors, (574), 557 states have internal predecessors, (574), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-08-30 17:40:13,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 589 transitions. [2021-08-30 17:40:13,721 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 589 transitions. Word has length 355 [2021-08-30 17:40:13,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:40:13,722 INFO L470 AbstractCegarLoop]: Abstraction has 570 states and 589 transitions. [2021-08-30 17:40:13,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-08-30 17:40:13,722 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 589 transitions. [2021-08-30 17:40:13,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 689 [2021-08-30 17:40:13,728 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:40:13,728 INFO L513 BasicCegarLoop]: trace histogram [128, 128, 128, 128, 128, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:40:13,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-30 17:40:13,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-30 17:40:13,952 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr1REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:40:13,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:40:13,953 INFO L82 PathProgramCache]: Analyzing trace with hash 179136785, now seen corresponding path program 3 times [2021-08-30 17:40:13,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:40:13,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976820843] [2021-08-30 17:40:13,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:40:13,953 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:40:14,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:14,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:40:14,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:14,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:40:14,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:14,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2021-08-30 17:40:14,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:14,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 349 [2021-08-30 17:40:14,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:14,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 520 [2021-08-30 17:40:14,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:14,359 INFO L134 CoverageAnalysis]: Checked inductivity of 41212 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 41182 trivial. 0 not checked. [2021-08-30 17:40:14,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:40:14,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976820843] [2021-08-30 17:40:14,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976820843] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:40:14,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944993363] [2021-08-30 17:40:14,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-30 17:40:14,360 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:40:14,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:40:14,361 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 17:40:14,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-30 17:40:14,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-30 17:40:14,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 17:40:14,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-30 17:40:14,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:40:14,488 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 17:40:14,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-08-30 17:40:14,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-08-30 17:40:17,720 INFO L134 CoverageAnalysis]: Checked inductivity of 41212 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 41196 trivial. 0 not checked. [2021-08-30 17:40:17,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:40:18,677 INFO L134 CoverageAnalysis]: Checked inductivity of 41212 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 41196 trivial. 0 not checked. [2021-08-30 17:40:18,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944993363] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:40:18,678 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 17:40:18,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 17 [2021-08-30 17:40:18,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637518098] [2021-08-30 17:40:18,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-30 17:40:18,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:40:18,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-30 17:40:18,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-08-30 17:40:18,680 INFO L87 Difference]: Start difference. First operand 570 states and 589 transitions. Second operand has 18 states, 16 states have (on average 4.0) internal successors, (64), 17 states have internal predecessors, (64), 9 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-08-30 17:40:19,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:40:19,156 INFO L93 Difference]: Finished difference Result 569 states and 582 transitions. [2021-08-30 17:40:19,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-30 17:40:19,157 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 4.0) internal successors, (64), 17 states have internal predecessors, (64), 9 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 688 [2021-08-30 17:40:19,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:40:19,160 INFO L225 Difference]: With dead ends: 569 [2021-08-30 17:40:19,160 INFO L226 Difference]: Without dead ends: 569 [2021-08-30 17:40:19,160 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 1414 GetRequests, 1373 SyntacticMatches, 13 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 551.19ms TimeCoverageRelationStatistics Valid=243, Invalid=627, Unknown=0, NotChecked=0, Total=870 [2021-08-30 17:40:19,161 INFO L928 BasicCegarLoop]: 7 mSDtfsCounter, 65 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 127.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.71ms SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 160.35ms IncrementalHoareTripleChecker+Time [2021-08-30 17:40:19,161 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 29 Invalid, 358 Unknown, 0 Unchecked, 2.71ms Time], IncrementalHoareTripleChecker [25 Valid, 274 Invalid, 0 Unknown, 59 Unchecked, 160.35ms Time] [2021-08-30 17:40:19,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-08-30 17:40:19,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 568. [2021-08-30 17:40:19,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 555 states have (on average 1.0198198198198198) internal successors, (566), 555 states have internal predecessors, (566), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-08-30 17:40:19,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 581 transitions. [2021-08-30 17:40:19,171 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 581 transitions. Word has length 688 [2021-08-30 17:40:19,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:40:19,172 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 581 transitions. [2021-08-30 17:40:19,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 4.0) internal successors, (64), 17 states have internal predecessors, (64), 9 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-08-30 17:40:19,172 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 581 transitions. [2021-08-30 17:40:19,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1040 [2021-08-30 17:40:19,179 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:40:19,180 INFO L513 BasicCegarLoop]: trace histogram [192, 192, 192, 192, 192, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:40:19,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-30 17:40:19,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-30 17:40:19,393 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr4ENSURES_VIOLATIONMEMORY_LEAK === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:40:19,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:40:19,393 INFO L82 PathProgramCache]: Analyzing trace with hash -15837658, now seen corresponding path program 2 times [2021-08-30 17:40:19,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:40:19,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154385689] [2021-08-30 17:40:19,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:40:19,394 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:40:19,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:19,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:40:19,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:19,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:40:19,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:19,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2021-08-30 17:40:19,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:19,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 349 [2021-08-30 17:40:19,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:19,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 520 [2021-08-30 17:40:19,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:19,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 691 [2021-08-30 17:40:19,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:19,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 862 [2021-08-30 17:40:19,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:19,934 INFO L134 CoverageAnalysis]: Checked inductivity of 93003 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 92907 trivial. 0 not checked. [2021-08-30 17:40:19,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:40:19,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154385689] [2021-08-30 17:40:19,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154385689] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:40:19,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66622862] [2021-08-30 17:40:19,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 17:40:19,935 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:40:19,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:40:19,941 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 17:40:19,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-30 17:40:20,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-08-30 17:40:20,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 17:40:20,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-30 17:40:20,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:40:20,095 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-08-30 17:40:20,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2021-08-30 17:40:22,304 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-08-30 17:40:22,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2021-08-30 17:40:24,448 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-08-30 17:40:24,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2021-08-30 17:40:26,453 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-08-30 17:40:26,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2021-08-30 17:40:28,345 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-08-30 17:40:28,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2021-08-30 17:40:30,222 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-08-30 17:40:30,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2021-08-30 17:40:32,234 INFO L134 CoverageAnalysis]: Checked inductivity of 93003 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 93003 trivial. 0 not checked. [2021-08-30 17:40:32,234 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-30 17:40:32,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66622862] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:40:32,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-30 17:40:32,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 14 [2021-08-30 17:40:32,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300628488] [2021-08-30 17:40:32,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 17:40:32,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:40:32,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 17:40:32,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-08-30 17:40:32,236 INFO L87 Difference]: Start difference. First operand 568 states and 581 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:40:32,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:40:32,279 INFO L93 Difference]: Finished difference Result 568 states and 580 transitions. [2021-08-30 17:40:32,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-30 17:40:32,279 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 1039 [2021-08-30 17:40:32,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:40:32,281 INFO L225 Difference]: With dead ends: 568 [2021-08-30 17:40:32,281 INFO L226 Difference]: Without dead ends: 0 [2021-08-30 17:40:32,281 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 1062 GetRequests, 1038 SyntacticMatches, 11 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 162.13ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-08-30 17:40:32,282 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 16 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.31ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 29.68ms IncrementalHoareTripleChecker+Time [2021-08-30 17:40:32,282 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 9 Invalid, 75 Unknown, 0 Unchecked, 0.31ms Time], IncrementalHoareTripleChecker [5 Valid, 35 Invalid, 0 Unknown, 35 Unchecked, 29.68ms Time] [2021-08-30 17:40:32,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-30 17:40:32,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-30 17:40:32,282 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) [2021-08-30 17:40:32,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-30 17:40:32,283 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1039 [2021-08-30 17:40:32,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:40:32,283 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-30 17:40:32,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:40:32,283 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-30 17:40:32,283 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-30 17:40:32,285 INFO L764 garLoopResultBuilder]: Registering result SAFE for location fooErr0ASSERT_VIOLATIONARRAY_INDEX (7 of 8 remaining) [2021-08-30 17:40:32,286 INFO L764 garLoopResultBuilder]: Registering result SAFE for location fooErr1REQUIRES_VIOLATION (6 of 8 remaining) [2021-08-30 17:40:32,286 INFO L764 garLoopResultBuilder]: Registering result SAFE for location fooErr2REQUIRES_VIOLATION (5 of 8 remaining) [2021-08-30 17:40:32,286 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION (4 of 8 remaining) [2021-08-30 17:40:32,286 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION (3 of 8 remaining) [2021-08-30 17:40:32,286 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2REQUIRES_VIOLATION (2 of 8 remaining) [2021-08-30 17:40:32,286 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3REQUIRES_VIOLATION (1 of 8 remaining) [2021-08-30 17:40:32,286 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr4ENSURES_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2021-08-30 17:40:32,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-30 17:40:32,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:40:32,509 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-30 17:40:32,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.08 05:40:32 BoogieIcfgContainer [2021-08-30 17:40:32,511 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-30 17:40:32,512 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-30 17:40:32,512 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-30 17:40:32,512 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-30 17:40:32,513 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:39:51" (3/4) ... [2021-08-30 17:40:32,515 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-30 17:40:32,520 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-08-30 17:40:32,520 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure foo [2021-08-30 17:40:32,520 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-08-30 17:40:32,524 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2021-08-30 17:40:32,524 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-08-30 17:40:32,524 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-08-30 17:40:32,524 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-30 17:40:32,549 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-30 17:40:32,549 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-30 17:40:32,549 INFO L158 Benchmark]: Toolchain (without parser) took 41525.59ms. Allocated memory was 48.2MB in the beginning and 438.3MB in the end (delta: 390.1MB). Free memory was 25.5MB in the beginning and 336.0MB in the end (delta: -310.5MB). Peak memory consumption was 78.9MB. Max. memory is 16.1GB. [2021-08-30 17:40:32,549 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 48.2MB. Free memory was 30.9MB in the beginning and 30.9MB in the end (delta: 46.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-30 17:40:32,550 INFO L158 Benchmark]: CACSL2BoogieTranslator took 171.78ms. Allocated memory was 48.2MB in the beginning and 62.9MB in the end (delta: 14.7MB). Free memory was 25.3MB in the beginning and 44.9MB in the end (delta: -19.6MB). Peak memory consumption was 7.0MB. Max. memory is 16.1GB. [2021-08-30 17:40:32,550 INFO L158 Benchmark]: Boogie Preprocessor took 87.81ms. Allocated memory is still 62.9MB. Free memory was 44.9MB in the beginning and 46.9MB in the end (delta: -2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-30 17:40:32,554 INFO L158 Benchmark]: RCFGBuilder took 238.20ms. Allocated memory is still 62.9MB. Free memory was 46.9MB in the beginning and 37.6MB in the end (delta: 9.4MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-08-30 17:40:32,554 INFO L158 Benchmark]: TraceAbstraction took 40984.05ms. Allocated memory was 62.9MB in the beginning and 438.3MB in the end (delta: 375.4MB). Free memory was 37.0MB in the beginning and 338.6MB in the end (delta: -301.6MB). Peak memory consumption was 75.9MB. Max. memory is 16.1GB. [2021-08-30 17:40:32,554 INFO L158 Benchmark]: Witness Printer took 37.02ms. Allocated memory is still 438.3MB. Free memory was 338.6MB in the beginning and 336.0MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-30 17:40:32,556 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 48.2MB. Free memory was 30.9MB in the beginning and 30.9MB in the end (delta: 46.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 171.78ms. Allocated memory was 48.2MB in the beginning and 62.9MB in the end (delta: 14.7MB). Free memory was 25.3MB in the beginning and 44.9MB in the end (delta: -19.6MB). Peak memory consumption was 7.0MB. Max. memory is 16.1GB. * Boogie Preprocessor took 87.81ms. Allocated memory is still 62.9MB. Free memory was 44.9MB in the beginning and 46.9MB in the end (delta: -2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 238.20ms. Allocated memory is still 62.9MB. Free memory was 46.9MB in the beginning and 37.6MB in the end (delta: 9.4MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * TraceAbstraction took 40984.05ms. Allocated memory was 62.9MB in the beginning and 438.3MB in the end (delta: 375.4MB). Free memory was 37.0MB in the beginning and 338.6MB in the end (delta: -301.6MB). Peak memory consumption was 75.9MB. Max. memory is 16.1GB. * Witness Printer took 37.02ms. Allocated memory is still 438.3MB. Free memory was 338.6MB in the beginning and 336.0MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 16]: array index is always in bounds For all program executions holds that array index is always in bounds 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: 27]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 27]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 21]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 40 locations, 8 error locations. Started 1 CEGAR loops. OverallTime: 40929.68ms, OverallIterations: 19, TraceHistogramMax: 192, EmptinessCheckTime: 48.52ms, AutomataDifference: 5442.58ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 0.00ms, InitialAbstractionConstructionTime: 11.08ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1570 SdHoareTripleChecker+Valid, 2241.10ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1566 mSDsluCounter, 412 SdHoareTripleChecker+Invalid, 1829.83ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 238 IncrementalHoareTripleChecker+Unchecked, 1394 mSDsCounter, 348 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3558 IncrementalHoareTripleChecker+Invalid, 4144 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 348 mSolverCounterUnsat, 101 mSDtfsCounter, 3558 mSolverCounterSat, 35.32ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5433 GetRequests, 5027 SyntacticMatches, 33 SemanticMatches, 373 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3441 ImplicationChecksByTransitivity, 6586.15ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=570occurred in iteration=17, InterpolantAutomatonStates: 205, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 132.26ms AutomataMinimizationTime, 19 MinimizatonAttempts, 99 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 338.07ms SsaConstructionTime, 1016.08ms SatisfiabilityAnalysisTime, 30500.08ms InterpolantComputationTime, 6675 NumberOfCodeBlocks, 4580 NumberOfCodeBlocksAsserted, 35 NumberOfCheckSat, 8442 ConstructedInterpolants, 2421 QuantifiedInterpolants, 50198 SizeOfPredicates, 24 NumberOfNonLiveVariables, 3406 ConjunctsInSsa, 127 ConjunctsInUnsatCore, 41 InterpolantComputations, 10 PerfectInterpolantSequences, 397791/407353 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 8 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-08-30 17:40:32,581 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...