./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2_-write.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8d31f386 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2_-write.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 a6853fb9e064ccfef5e54a8bac94eb86beeed80f ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.multireach-323-8d31f38 [2021-07-06 10:12:40,542 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-06 10:12:40,544 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-06 10:12:40,578 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-06 10:12:40,578 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-06 10:12:40,582 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-06 10:12:40,583 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-06 10:12:40,588 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-06 10:12:40,590 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-06 10:12:40,594 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-06 10:12:40,595 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-06 10:12:40,596 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-06 10:12:40,597 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-06 10:12:40,599 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-06 10:12:40,600 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-06 10:12:40,601 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-06 10:12:40,604 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-06 10:12:40,605 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-06 10:12:40,607 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-06 10:12:40,614 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-06 10:12:40,615 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-06 10:12:40,616 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-06 10:12:40,618 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-06 10:12:40,619 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-06 10:12:40,625 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-07-06 10:12:40,625 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-07-06 10:12:40,625 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-07-06 10:12:40,627 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-07-06 10:12:40,627 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-07-06 10:12:40,628 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-07-06 10:12:40,629 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-06 10:12:40,629 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-06 10:12:40,631 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-06 10:12:40,631 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-06 10:12:40,632 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-06 10:12:40,632 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-06 10:12:40,633 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-06 10:12:40,633 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-06 10:12:40,633 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-06 10:12:40,635 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-06 10:12:40,636 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-06 10:12:40,636 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-07-06 10:12:40,686 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-06 10:12:40,687 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-06 10:12:40,689 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-06 10:12:40,689 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-06 10:12:40,689 INFO L138 SettingsManager]: * Use SBE=true [2021-07-06 10:12:40,690 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-06 10:12:40,690 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-06 10:12:40,691 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-07-06 10:12:40,691 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-06 10:12:40,691 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-06 10:12:40,692 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-06 10:12:40,692 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-07-06 10:12:40,692 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-07-06 10:12:40,693 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-07-06 10:12:40,693 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-06 10:12:40,693 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-07-06 10:12:40,693 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-06 10:12:40,693 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-06 10:12:40,694 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-06 10:12:40,694 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-06 10:12:40,694 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-06 10:12:40,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-06 10:12:40,695 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-06 10:12:40,695 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-06 10:12:40,695 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-06 10:12:40,695 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-06 10:12:40,695 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-07-06 10:12:40,696 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a6853fb9e064ccfef5e54a8bac94eb86beeed80f [2021-07-06 10:12:40,980 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-06 10:12:41,007 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-06 10:12:41,010 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-06 10:12:41,011 INFO L271 PluginConnector]: Initializing CDTParser... [2021-07-06 10:12:41,012 INFO L275 PluginConnector]: CDTParser initialized [2021-07-06 10:12:41,013 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2_-write.c [2021-07-06 10:12:41,074 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/147d9f3fc/212eab6f4d834af1b9dfb220b49016d7/FLAGc1893dd22 [2021-07-06 10:12:41,509 INFO L306 CDTParser]: Found 1 translation units. [2021-07-06 10:12:41,509 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2_-write.c [2021-07-06 10:12:41,514 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/147d9f3fc/212eab6f4d834af1b9dfb220b49016d7/FLAGc1893dd22 [2021-07-06 10:12:41,946 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/147d9f3fc/212eab6f4d834af1b9dfb220b49016d7 [2021-07-06 10:12:41,951 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-06 10:12:41,953 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-07-06 10:12:41,954 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-07-06 10:12:41,955 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-07-06 10:12:41,963 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-07-06 10:12:41,963 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.07 10:12:41" (1/1) ... [2021-07-06 10:12:41,964 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68a22d53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 10:12:41, skipping insertion in model container [2021-07-06 10:12:41,964 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.07 10:12:41" (1/1) ... [2021-07-06 10:12:41,970 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-07-06 10:12:41,982 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-07-06 10:12:42,117 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-06 10:12:42,124 INFO L203 MainTranslator]: Completed pre-run [2021-07-06 10:12:42,155 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-06 10:12:42,190 INFO L208 MainTranslator]: Completed translation [2021-07-06 10:12:42,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 10:12:42 WrapperNode [2021-07-06 10:12:42,190 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-07-06 10:12:42,191 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-06 10:12:42,192 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-06 10:12:42,192 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-06 10:12:42,199 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 10:12:42" (1/1) ... [2021-07-06 10:12:42,200 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 10:12:42" (1/1) ... [2021-07-06 10:12:42,206 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 10:12:42" (1/1) ... [2021-07-06 10:12:42,206 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 10:12:42" (1/1) ... [2021-07-06 10:12:42,224 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 10:12:42" (1/1) ... [2021-07-06 10:12:42,229 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 10:12:42" (1/1) ... [2021-07-06 10:12:42,235 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 10:12:42" (1/1) ... [2021-07-06 10:12:42,239 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-06 10:12:42,240 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-06 10:12:42,241 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-06 10:12:42,241 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-06 10:12:42,241 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 10:12:42" (1/1) ... [2021-07-06 10:12:42,247 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-06 10:12:42,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-07-06 10:12:42,265 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-07-06 10:12:42,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-07-06 10:12:42,301 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-07-06 10:12:42,302 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-06 10:12:42,302 INFO L138 BoogieDeclarations]: Found implementation of procedure bar [2021-07-06 10:12:42,302 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-07-06 10:12:42,302 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-07-06 10:12:42,303 INFO L130 BoogieDeclarations]: Found specification of procedure bar [2021-07-06 10:12:42,303 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-07-06 10:12:42,303 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-07-06 10:12:42,303 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-07-06 10:12:42,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-07-06 10:12:42,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-07-06 10:12:42,304 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-07-06 10:12:42,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-07-06 10:12:42,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-06 10:12:42,722 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-06 10:12:42,722 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-07-06 10:12:42,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.07 10:12:42 BoogieIcfgContainer [2021-07-06 10:12:42,723 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-06 10:12:42,725 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-06 10:12:42,725 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-06 10:12:42,730 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-06 10:12:42,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.07 10:12:41" (1/3) ... [2021-07-06 10:12:42,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dabc57c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.07 10:12:42, skipping insertion in model container [2021-07-06 10:12:42,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 10:12:42" (2/3) ... [2021-07-06 10:12:42,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dabc57c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.07 10:12:42, skipping insertion in model container [2021-07-06 10:12:42,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.07 10:12:42" (3/3) ... [2021-07-06 10:12:42,737 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength2_-write.c [2021-07-06 10:12:42,742 INFO L198 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-06 10:12:42,743 INFO L158 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2021-07-06 10:12:42,773 INFO L328 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == barErr0REQUIRES_VIOLATION ======== [2021-07-06 10:12:42,779 INFO L329 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mLimitAnalysisTime=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-07-06 10:12:42,779 INFO L330 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-06 10:12:42,798 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 32 states have (on average 1.65625) internal successors, (53), 43 states have internal predecessors, (53), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-07-06 10:12:42,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-06 10:12:42,805 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 10:12:42,806 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 10:12:42,806 INFO L374 AbstractCegarLoop]: === Iteration 1 === [barErr0REQUIRES_VIOLATION] === [2021-07-06 10:12:42,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 10:12:42,812 INFO L82 PathProgramCache]: Analyzing trace with hash 69109038, now seen corresponding path program 1 times [2021-07-06 10:12:42,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 10:12:42,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486774050] [2021-07-06 10:12:42,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 10:12:42,823 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 10:12:42,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 10:12:42,943 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:42,945 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 10:12:42,946 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:42,946 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 10:12:42,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 10:12:42,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 10:12:42,986 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:42,987 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 10:12:42,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-06 10:12:42,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 10:12:42,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486774050] [2021-07-06 10:12:42,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486774050] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 10:12:42,991 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 10:12:42,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-06 10:12:43,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25470862] [2021-07-06 10:12:43,009 INFO L425 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-06 10:12:43,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 10:12:43,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-06 10:12:43,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-06 10:12:43,026 INFO L87 Difference]: Start difference. First operand has 52 states, 32 states have (on average 1.65625) internal successors, (53), 43 states have internal predecessors, (53), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 10:12:43,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 10:12:43,143 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2021-07-06 10:12:43,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-06 10:12:43,149 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (4), 3 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 14 [2021-07-06 10:12:43,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 10:12:43,155 INFO L225 Difference]: With dead ends: 52 [2021-07-06 10:12:43,155 INFO L226 Difference]: Without dead ends: 32 [2021-07-06 10:12:43,157 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-06 10:12:43,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-07-06 10:12:43,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-07-06 10:12:43,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 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) [2021-07-06 10:12:43,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-07-06 10:12:43,188 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 14 [2021-07-06 10:12:43,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 10:12:43,188 INFO L442 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-07-06 10:12:43,188 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 10:12:43,189 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-07-06 10:12:43,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-06 10:12:43,189 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 10:12:43,189 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 10:12:43,190 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-06 10:12:43,190 INFO L374 AbstractCegarLoop]: === Iteration 2 === [barErr0REQUIRES_VIOLATION] === [2021-07-06 10:12:43,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 10:12:43,192 INFO L82 PathProgramCache]: Analyzing trace with hash 57103265, now seen corresponding path program 1 times [2021-07-06 10:12:43,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 10:12:43,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894741220] [2021-07-06 10:12:43,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 10:12:43,193 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 10:12:43,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 10:12:43,265 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:43,266 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 10:12:43,266 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:43,281 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-07-06 10:12:43,291 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:43,292 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-07-06 10:12:43,297 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:43,297 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-07-06 10:12:43,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 10:12:43,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 10:12:43,327 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:43,327 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 10:12:43,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-06 10:12:43,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 10:12:43,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894741220] [2021-07-06 10:12:43,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894741220] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 10:12:43,329 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 10:12:43,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-06 10:12:43,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609830693] [2021-07-06 10:12:43,331 INFO L425 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-06 10:12:43,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 10:12:43,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-06 10:12:43,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-06 10:12:43,334 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 10:12:43,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 10:12:43,466 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2021-07-06 10:12:43,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-06 10:12:43,467 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (4), 3 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 14 [2021-07-06 10:12:43,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 10:12:43,468 INFO L225 Difference]: With dead ends: 31 [2021-07-06 10:12:43,468 INFO L226 Difference]: Without dead ends: 0 [2021-07-06 10:12:43,469 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 65.8ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-07-06 10:12:43,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-06 10:12:43,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-06 10:12:43,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-06 10:12:43,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-06 10:12:43,470 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2021-07-06 10:12:43,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 10:12:43,471 INFO L442 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-06 10:12:43,473 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 10:12:43,474 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-06 10:12:43,474 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-06 10:12:43,479 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-06 10:12:43,480 WARN L182 nStatisticsGenerator]: total relevant statements: 0 [2021-07-06 10:12:43,483 INFO L303 ceAbstractionStarter]: Result for error location barErr0REQUIRES_VIOLATION was SAFE (1/11) [2021-07-06 10:12:43,486 INFO L328 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == barErr1REQUIRES_VIOLATION ======== [2021-07-06 10:12:43,491 INFO L329 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mLimitAnalysisTime=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-07-06 10:12:43,492 INFO L330 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-06 10:12:43,499 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 32 states have (on average 1.65625) internal successors, (53), 43 states have internal predecessors, (53), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-07-06 10:12:43,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-06 10:12:43,503 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 10:12:43,503 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 10:12:43,503 INFO L374 AbstractCegarLoop]: === Iteration 1 === [barErr1REQUIRES_VIOLATION] === [2021-07-06 10:12:43,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 10:12:43,504 INFO L82 PathProgramCache]: Analyzing trace with hash 69109039, now seen corresponding path program 1 times [2021-07-06 10:12:43,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 10:12:43,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371622629] [2021-07-06 10:12:43,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 10:12:43,506 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 10:12:43,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 10:12:43,543 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:43,544 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 10:12:43,544 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:43,545 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 10:12:43,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 10:12:43,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 10:12:43,556 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:43,557 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 10:12:43,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-06 10:12:43,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 10:12:43,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371622629] [2021-07-06 10:12:43,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371622629] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 10:12:43,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 10:12:43,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-06 10:12:43,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328484316] [2021-07-06 10:12:43,558 INFO L425 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-06 10:12:43,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 10:12:43,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-06 10:12:43,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-06 10:12:43,560 INFO L87 Difference]: Start difference. First operand has 52 states, 32 states have (on average 1.65625) internal successors, (53), 43 states have internal predecessors, (53), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 10:12:43,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 10:12:43,621 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2021-07-06 10:12:43,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-06 10:12:43,622 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (4), 3 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 14 [2021-07-06 10:12:43,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 10:12:43,622 INFO L225 Difference]: With dead ends: 52 [2021-07-06 10:12:43,623 INFO L226 Difference]: Without dead ends: 32 [2021-07-06 10:12:43,623 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-06 10:12:43,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-07-06 10:12:43,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-07-06 10:12:43,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 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) [2021-07-06 10:12:43,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-07-06 10:12:43,627 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 14 [2021-07-06 10:12:43,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 10:12:43,627 INFO L442 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-07-06 10:12:43,627 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 10:12:43,628 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-07-06 10:12:43,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-06 10:12:43,628 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 10:12:43,628 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 10:12:43,629 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-06 10:12:43,629 INFO L374 AbstractCegarLoop]: === Iteration 2 === [barErr1REQUIRES_VIOLATION] === [2021-07-06 10:12:43,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 10:12:43,629 INFO L82 PathProgramCache]: Analyzing trace with hash 57103266, now seen corresponding path program 1 times [2021-07-06 10:12:43,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 10:12:43,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350161238] [2021-07-06 10:12:43,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 10:12:43,630 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 10:12:43,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 10:12:43,662 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:43,663 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 10:12:43,663 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:43,664 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 10:12:43,669 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:43,669 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 10:12:43,677 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:43,678 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-06 10:12:43,687 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:43,687 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 10:12:43,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 10:12:43,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 10:12:43,710 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:43,710 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 10:12:43,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-06 10:12:43,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 10:12:43,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350161238] [2021-07-06 10:12:43,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350161238] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 10:12:43,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 10:12:43,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-06 10:12:43,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926175943] [2021-07-06 10:12:43,714 INFO L425 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-06 10:12:43,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 10:12:43,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-06 10:12:43,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-06 10:12:43,715 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 10:12:43,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 10:12:43,917 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2021-07-06 10:12:43,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-06 10:12:43,917 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 3 states have call successors, (4), 4 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 14 [2021-07-06 10:12:43,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 10:12:43,919 INFO L225 Difference]: With dead ends: 54 [2021-07-06 10:12:43,919 INFO L226 Difference]: Without dead ends: 54 [2021-07-06 10:12:43,920 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 51.8ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-06 10:12:43,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-07-06 10:12:43,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2021-07-06 10:12:43,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 36 states have internal predecessors, (41), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-07-06 10:12:43,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2021-07-06 10:12:43,926 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 14 [2021-07-06 10:12:43,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 10:12:43,927 INFO L442 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2021-07-06 10:12:43,927 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 10:12:43,927 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2021-07-06 10:12:43,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-06 10:12:43,928 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 10:12:43,928 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 10:12:43,928 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-06 10:12:43,928 INFO L374 AbstractCegarLoop]: === Iteration 3 === [barErr1REQUIRES_VIOLATION] === [2021-07-06 10:12:43,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 10:12:43,928 INFO L82 PathProgramCache]: Analyzing trace with hash -775228555, now seen corresponding path program 1 times [2021-07-06 10:12:43,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 10:12:43,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235456097] [2021-07-06 10:12:43,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 10:12:43,929 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 10:12:43,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 10:12:43,994 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:43,995 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 10:12:43,995 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:43,995 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 10:12:43,999 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:43,999 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 10:12:44,003 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,004 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-07-06 10:12:44,014 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,022 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-07-06 10:12:44,025 INFO L142 QuantifierPusher]: treesize reduction 8, result has 11.1 percent of original size [2021-07-06 10:12:44,027 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 10:12:44,028 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,028 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 10:12:44,029 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,029 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 10:12:44,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 10:12:44,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 10:12:44,049 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,049 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 10:12:44,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-06 10:12:44,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 10:12:44,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235456097] [2021-07-06 10:12:44,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235456097] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 10:12:44,051 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 10:12:44,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-06 10:12:44,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497627032] [2021-07-06 10:12:44,052 INFO L425 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-06 10:12:44,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 10:12:44,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-06 10:12:44,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-06 10:12:44,053 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 10:12:44,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 10:12:44,102 INFO L93 Difference]: Finished difference Result 12 states and 11 transitions. [2021-07-06 10:12:44,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-06 10:12:44,103 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (4), 4 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 19 [2021-07-06 10:12:44,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 10:12:44,103 INFO L225 Difference]: With dead ends: 12 [2021-07-06 10:12:44,103 INFO L226 Difference]: Without dead ends: 0 [2021-07-06 10:12:44,104 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 51.5ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-06 10:12:44,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-06 10:12:44,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-06 10:12:44,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-06 10:12:44,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-06 10:12:44,104 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2021-07-06 10:12:44,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 10:12:44,105 INFO L442 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-06 10:12:44,105 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 10:12:44,105 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-06 10:12:44,105 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-06 10:12:44,106 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-06 10:12:44,106 WARN L182 nStatisticsGenerator]: total relevant statements: 0 [2021-07-06 10:12:44,106 INFO L303 ceAbstractionStarter]: Result for error location barErr1REQUIRES_VIOLATION was SAFE (2/11) [2021-07-06 10:12:44,107 INFO L328 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == fooErr0REQUIRES_VIOLATION ======== [2021-07-06 10:12:44,108 INFO L329 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mLimitAnalysisTime=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-07-06 10:12:44,108 INFO L330 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-06 10:12:44,110 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 32 states have (on average 1.65625) internal successors, (53), 43 states have internal predecessors, (53), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-07-06 10:12:44,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-06 10:12:44,110 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 10:12:44,110 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 10:12:44,111 INFO L374 AbstractCegarLoop]: === Iteration 1 === [fooErr0REQUIRES_VIOLATION] === [2021-07-06 10:12:44,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 10:12:44,111 INFO L82 PathProgramCache]: Analyzing trace with hash -571487811, now seen corresponding path program 1 times [2021-07-06 10:12:44,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 10:12:44,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289874400] [2021-07-06 10:12:44,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 10:12:44,112 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 10:12:44,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 10:12:44,152 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,152 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 10:12:44,153 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,153 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-07-06 10:12:44,157 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,157 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-07-06 10:12:44,161 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,161 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-07-06 10:12:44,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 10:12:44,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 10:12:44,189 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,190 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 10:12:44,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-06 10:12:44,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 10:12:44,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289874400] [2021-07-06 10:12:44,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289874400] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 10:12:44,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 10:12:44,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-06 10:12:44,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329138] [2021-07-06 10:12:44,194 INFO L425 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-06 10:12:44,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 10:12:44,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-06 10:12:44,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-06 10:12:44,196 INFO L87 Difference]: Start difference. First operand has 52 states, 32 states have (on average 1.65625) internal successors, (53), 43 states have internal predecessors, (53), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 10:12:44,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 10:12:44,341 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2021-07-06 10:12:44,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-06 10:12:44,341 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-07-06 10:12:44,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 10:12:44,342 INFO L225 Difference]: With dead ends: 50 [2021-07-06 10:12:44,342 INFO L226 Difference]: Without dead ends: 0 [2021-07-06 10:12:44,342 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 36.0ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-06 10:12:44,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-06 10:12:44,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-06 10:12:44,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-06 10:12:44,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-06 10:12:44,343 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2021-07-06 10:12:44,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 10:12:44,343 INFO L442 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-06 10:12:44,343 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 10:12:44,344 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-06 10:12:44,344 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-06 10:12:44,344 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-07-06 10:12:44,344 WARN L182 nStatisticsGenerator]: total relevant statements: 0 [2021-07-06 10:12:44,344 INFO L303 ceAbstractionStarter]: Result for error location fooErr0REQUIRES_VIOLATION was SAFE (3/11) [2021-07-06 10:12:44,346 INFO L328 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == fooErr1REQUIRES_VIOLATION ======== [2021-07-06 10:12:44,346 INFO L329 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mLimitAnalysisTime=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-07-06 10:12:44,346 INFO L330 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-06 10:12:44,352 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 32 states have (on average 1.65625) internal successors, (53), 43 states have internal predecessors, (53), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-07-06 10:12:44,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-06 10:12:44,354 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 10:12:44,354 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 10:12:44,354 INFO L374 AbstractCegarLoop]: === Iteration 1 === [fooErr1REQUIRES_VIOLATION] === [2021-07-06 10:12:44,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 10:12:44,355 INFO L82 PathProgramCache]: Analyzing trace with hash -571487810, now seen corresponding path program 1 times [2021-07-06 10:12:44,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 10:12:44,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123016315] [2021-07-06 10:12:44,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 10:12:44,356 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 10:12:44,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 10:12:44,402 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,403 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 10:12:44,407 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,408 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-07-06 10:12:44,416 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,416 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-07-06 10:12:44,438 INFO L142 QuantifierPusher]: treesize reduction 7, result has 63.2 percent of original size [2021-07-06 10:12:44,439 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-07-06 10:12:44,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 10:12:44,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 10:12:44,463 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,464 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 10:12:44,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-06 10:12:44,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 10:12:44,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123016315] [2021-07-06 10:12:44,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123016315] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 10:12:44,467 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 10:12:44,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-06 10:12:44,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418362770] [2021-07-06 10:12:44,468 INFO L425 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-06 10:12:44,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 10:12:44,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-06 10:12:44,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-06 10:12:44,469 INFO L87 Difference]: Start difference. First operand has 52 states, 32 states have (on average 1.65625) internal successors, (53), 43 states have internal predecessors, (53), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 10:12:44,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 10:12:44,677 INFO L93 Difference]: Finished difference Result 87 states and 102 transitions. [2021-07-06 10:12:44,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-06 10:12:44,678 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-07-06 10:12:44,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 10:12:44,680 INFO L225 Difference]: With dead ends: 87 [2021-07-06 10:12:44,680 INFO L226 Difference]: Without dead ends: 54 [2021-07-06 10:12:44,680 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 64.4ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-06 10:12:44,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-07-06 10:12:44,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 42. [2021-07-06 10:12:44,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 32 states have internal predecessors, (37), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-07-06 10:12:44,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2021-07-06 10:12:44,687 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 11 [2021-07-06 10:12:44,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 10:12:44,687 INFO L442 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2021-07-06 10:12:44,687 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 10:12:44,687 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2021-07-06 10:12:44,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-06 10:12:44,688 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 10:12:44,688 INFO L525 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 10:12:44,688 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-06 10:12:44,689 INFO L374 AbstractCegarLoop]: === Iteration 2 === [fooErr1REQUIRES_VIOLATION] === [2021-07-06 10:12:44,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 10:12:44,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1069190453, now seen corresponding path program 1 times [2021-07-06 10:12:44,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 10:12:44,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049852711] [2021-07-06 10:12:44,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 10:12:44,689 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 10:12:44,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 10:12:44,709 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,709 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 10:12:44,710 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,710 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 10:12:44,713 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,713 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 10:12:44,717 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,718 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-06 10:12:44,725 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,725 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 10:12:44,730 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,731 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 10:12:44,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 10:12:44,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 10:12:44,742 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,743 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 10:12:44,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-06 10:12:44,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 10:12:44,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049852711] [2021-07-06 10:12:44,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049852711] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-06 10:12:44,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943281943] [2021-07-06 10:12:44,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 10:12:44,744 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-06 10:12:44,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-07-06 10:12:44,746 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) [2021-07-06 10:12:44,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-07-06 10:12:44,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 10:12:44,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-06 10:12:44,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-06 10:12:44,824 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,824 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 10:12:44,825 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,825 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 10:12:44,826 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,826 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 10:12:44,834 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,835 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 10:12:44,836 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,836 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 10:12:44,837 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,837 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 10:12:44,837 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,838 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 10:12:44,839 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,840 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 10:12:44,852 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,853 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 10:12:44,853 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,854 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 10:12:44,854 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,854 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 10:12:44,855 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,855 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 10:12:44,856 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,856 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 10:12:44,857 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,857 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 10:12:44,857 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,858 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 10:12:44,858 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,858 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 10:12:44,859 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,859 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 10:12:44,860 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,860 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 10:12:44,860 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,861 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 10:12:44,861 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,861 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 10:12:44,862 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,862 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 10:12:44,863 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,863 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 10:12:44,863 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,864 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 10:12:44,864 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,871 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 10:12:44,879 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,879 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 10:12:44,879 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,880 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 10:12:44,880 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,881 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 10:12:44,881 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,881 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 10:12:44,884 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-07-06 10:12:44,897 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,903 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-07-06 10:12:44,904 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-07-06 10:12:44,905 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-07-06 10:12:44,906 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,906 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-07-06 10:12:44,907 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-07-06 10:12:44,908 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,916 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 10:12:44,917 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,917 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 10:12:44,918 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,918 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-07-06 10:12:44,919 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-07-06 10:12:44,922 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,923 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-06 10:12:44,923 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-07-06 10:12:44,926 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,931 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-06 10:12:44,932 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,932 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-06 10:12:44,955 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,955 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-06 10:12:44,956 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,957 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-06 10:12:44,957 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,958 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-06 10:12:44,958 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,959 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-06 10:12:44,959 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,960 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-06 10:12:44,960 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,961 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-06 10:12:44,963 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,963 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-06 10:12:44,971 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,972 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-06 10:12:44,973 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,973 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-06 10:12:44,974 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,974 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-06 10:12:44,975 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,976 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-06 10:12:44,977 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,983 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-06 10:12:44,983 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,984 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-06 10:12:44,984 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,985 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-06 10:12:44,992 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,993 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-06 10:12:44,993 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,994 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-06 10:12:44,995 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-07-06 10:12:44,997 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:44,997 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-07-06 10:12:44,998 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-07-06 10:12:44,999 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:45,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-07-06 10:12:45,005 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:45,006 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-07-06 10:12:45,012 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-07-06 10:12:45,014 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:45,019 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-06 10:12:45,022 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:45,022 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-06 10:12:45,038 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:45,039 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-07-06 10:12:45,039 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:45,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-07-06 10:12:45,041 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:45,047 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-07-06 10:12:45,048 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-07-06 10:12:45,048 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:45,051 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 10:12:45,051 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:45,052 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 10:12:45,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-06 10:12:45,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943281943] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 10:12:45,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-06 10:12:45,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 10 [2021-07-06 10:12:45,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8116586] [2021-07-06 10:12:45,059 INFO L425 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-06 10:12:45,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 10:12:45,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-06 10:12:45,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-06 10:12:45,061 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 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) [2021-07-06 10:12:45,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 10:12:45,150 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2021-07-06 10:12:45,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-06 10:12:45,151 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 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 16 [2021-07-06 10:12:45,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 10:12:45,155 INFO L225 Difference]: With dead ends: 55 [2021-07-06 10:12:45,155 INFO L226 Difference]: Without dead ends: 55 [2021-07-06 10:12:45,156 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.4ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-06 10:12:45,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-07-06 10:12:45,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2021-07-06 10:12:45,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 36 states have internal predecessors, (41), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-07-06 10:12:45,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2021-07-06 10:12:45,168 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 16 [2021-07-06 10:12:45,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 10:12:45,169 INFO L442 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2021-07-06 10:12:45,169 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 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) [2021-07-06 10:12:45,169 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2021-07-06 10:12:45,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-06 10:12:45,173 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 10:12:45,173 INFO L525 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 10:12:45,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-07-06 10:12:45,401 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-06 10:12:45,401 INFO L374 AbstractCegarLoop]: === Iteration 3 === [fooErr1REQUIRES_VIOLATION] === [2021-07-06 10:12:45,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 10:12:45,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1628784052, now seen corresponding path program 1 times [2021-07-06 10:12:45,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 10:12:45,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435795257] [2021-07-06 10:12:45,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 10:12:45,402 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 10:12:45,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 10:12:45,426 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:45,427 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 10:12:45,427 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:45,428 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 10:12:45,431 INFO L142 QuantifierPusher]: treesize reduction 8, result has 11.1 percent of original size [2021-07-06 10:12:45,431 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 10:12:45,432 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:45,432 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 10:12:45,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 10:12:45,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 10:12:45,447 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:45,448 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 10:12:45,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-07-06 10:12:45,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 10:12:45,469 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:45,470 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-06 10:12:45,478 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:45,479 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-07-06 10:12:45,490 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:45,491 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-06 10:12:45,504 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:45,504 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 10:12:45,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-07-06 10:12:45,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 10:12:45,523 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:45,523 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 10:12:45,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-06 10:12:45,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 10:12:45,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435795257] [2021-07-06 10:12:45,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435795257] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 10:12:45,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 10:12:45,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-07-06 10:12:45,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673663263] [2021-07-06 10:12:45,524 INFO L425 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-06 10:12:45,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 10:12:45,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-06 10:12:45,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-07-06 10:12:45,525 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-07-06 10:12:45,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 10:12:45,652 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2021-07-06 10:12:45,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-06 10:12:45,653 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 29 [2021-07-06 10:12:45,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 10:12:45,653 INFO L225 Difference]: With dead ends: 66 [2021-07-06 10:12:45,654 INFO L226 Difference]: Without dead ends: 61 [2021-07-06 10:12:45,654 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 75.2ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-07-06 10:12:45,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-07-06 10:12:45,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2021-07-06 10:12:45,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 36 states have internal predecessors, (40), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-07-06 10:12:45,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-07-06 10:12:45,658 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 29 [2021-07-06 10:12:45,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 10:12:45,658 INFO L442 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-07-06 10:12:45,658 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-07-06 10:12:45,658 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-07-06 10:12:45,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-06 10:12:45,659 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 10:12:45,659 INFO L525 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 10:12:45,659 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-07-06 10:12:45,660 INFO L374 AbstractCegarLoop]: === Iteration 4 === [fooErr1REQUIRES_VIOLATION] === [2021-07-06 10:12:45,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 10:12:45,660 INFO L82 PathProgramCache]: Analyzing trace with hash 609854849, now seen corresponding path program 1 times [2021-07-06 10:12:45,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 10:12:45,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85875446] [2021-07-06 10:12:45,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 10:12:45,661 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 10:12:45,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 10:12:45,681 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:45,682 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 10:12:45,682 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:45,683 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 10:12:45,685 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:45,686 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 10:12:45,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 10:12:45,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 10:12:45,696 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:45,696 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 10:12:45,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-07-06 10:12:45,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 10:12:45,724 INFO L142 QuantifierPusher]: treesize reduction 20, result has 44.4 percent of original size [2021-07-06 10:12:45,725 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-07-06 10:12:45,738 INFO L142 QuantifierPusher]: treesize reduction 20, result has 37.5 percent of original size [2021-07-06 10:12:45,739 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-07-06 10:12:45,754 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:45,758 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-07-06 10:12:45,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-07-06 10:12:45,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 10:12:45,770 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:45,770 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 10:12:45,771 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-06 10:12:45,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 10:12:45,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85875446] [2021-07-06 10:12:45,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85875446] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 10:12:45,771 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 10:12:45,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-06 10:12:45,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245982971] [2021-07-06 10:12:45,772 INFO L425 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-06 10:12:45,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 10:12:45,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-06 10:12:45,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-06 10:12:45,773 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 6 states have internal predecessors, (26), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-07-06 10:12:45,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 10:12:45,847 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-07-06 10:12:45,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-06 10:12:45,848 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 6 states have internal predecessors, (26), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 34 [2021-07-06 10:12:45,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 10:12:45,850 INFO L225 Difference]: With dead ends: 28 [2021-07-06 10:12:45,850 INFO L226 Difference]: Without dead ends: 0 [2021-07-06 10:12:45,851 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 59.6ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-07-06 10:12:45,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-06 10:12:45,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-06 10:12:45,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-06 10:12:45,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-06 10:12:45,851 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 34 [2021-07-06 10:12:45,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 10:12:45,852 INFO L442 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-06 10:12:45,852 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 6 states have internal predecessors, (26), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-07-06 10:12:45,852 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-06 10:12:45,852 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-06 10:12:45,853 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-07-06 10:12:45,853 WARN L182 nStatisticsGenerator]: total relevant statements: 0 [2021-07-06 10:12:45,853 INFO L303 ceAbstractionStarter]: Result for error location fooErr1REQUIRES_VIOLATION was SAFE (4/11) [2021-07-06 10:12:45,854 INFO L328 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == fooErr2REQUIRES_VIOLATION ======== [2021-07-06 10:12:45,855 INFO L329 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mLimitAnalysisTime=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-07-06 10:12:45,855 INFO L330 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-06 10:12:45,857 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 32 states have (on average 1.65625) internal successors, (53), 43 states have internal predecessors, (53), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-07-06 10:12:45,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-06 10:12:45,857 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 10:12:45,857 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 10:12:45,858 INFO L374 AbstractCegarLoop]: === Iteration 1 === [fooErr2REQUIRES_VIOLATION] === [2021-07-06 10:12:45,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 10:12:45,858 INFO L82 PathProgramCache]: Analyzing trace with hash -536252953, now seen corresponding path program 1 times [2021-07-06 10:12:45,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 10:12:45,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441452403] [2021-07-06 10:12:45,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 10:12:45,859 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 10:12:45,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 10:12:45,876 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:45,882 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 10:12:45,883 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:45,883 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-07-06 10:12:45,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 10:12:45,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 10:12:45,899 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 10:12:45,900 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 10:12:45,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-06 10:12:45,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 10:12:45,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441452403] [2021-07-06 10:12:45,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441452403] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 10:12:45,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 10:12:45,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-06 10:12:45,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205724123] [2021-07-06 10:12:45,901 INFO L425 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-06 10:12:45,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 10:12:45,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-06 10:12:45,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-06 10:12:45,902 INFO L87 Difference]: Start difference. First operand has 52 states, 32 states have (on average 1.65625) internal successors, (53), 43 states have internal predecessors, (53), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (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) [2021-07-06 10:12:45,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 10:12:45,973 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2021-07-06 10:12:45,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-06 10:12:45,974 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (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 12 [2021-07-06 10:12:45,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 10:12:45,974 INFO L225 Difference]: With dead ends: 51 [2021-07-06 10:12:45,974 INFO L226 Difference]: Without dead ends: 0 [2021-07-06 10:12:45,975 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-06 10:12:45,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-06 10:12:45,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-06 10:12:45,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-06 10:12:45,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-06 10:12:45,975 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2021-07-06 10:12:45,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 10:12:45,976 INFO L442 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-06 10:12:45,976 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (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) [2021-07-06 10:12:45,976 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-06 10:12:45,976 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-06 10:12:45,976 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-07-06 10:12:45,976 WARN L182 nStatisticsGenerator]: total relevant statements: 0 [2021-07-06 10:12:45,977 INFO L303 ceAbstractionStarter]: Result for error location fooErr2REQUIRES_VIOLATION was SAFE (5/11) [2021-07-06 10:12:45,980 INFO L328 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == fooErr3REQUIRES_VIOLATION ======== [2021-07-06 10:12:45,980 INFO L329 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mLimitAnalysisTime=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-07-06 10:12:45,980 INFO L330 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-06 10:12:45,981 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 32 states have (on average 1.65625) internal successors, (53), 43 states have internal predecessors, (53), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-07-06 10:12:45,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-06 10:12:45,982 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 10:12:45,982 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 10:12:45,982 INFO L374 AbstractCegarLoop]: === Iteration 1 === [fooErr3REQUIRES_VIOLATION] === [2021-07-06 10:12:45,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 10:12:45,985 INFO L82 PathProgramCache]: Analyzing trace with hash -536252952, now seen corresponding path program 1 times [2021-07-06 10:12:45,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 10:12:45,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324854492] [2021-07-06 10:12:45,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 10:12:45,986 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 10:12:46,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-07-06 10:12:46,002 INFO L224 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-07-06 10:12:46,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-07-06 10:12:46,007 INFO L224 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-07-06 10:12:46,018 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-07-06 10:12:46,019 INFO L639 BasicCegarLoop]: Counterexample is feasible [2021-07-06 10:12:46,019 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-07-06 10:12:46,019 WARN L182 nStatisticsGenerator]: total relevant statements: 0 [2021-07-06 10:12:46,019 INFO L303 ceAbstractionStarter]: Result for error location fooErr3REQUIRES_VIOLATION was UNSAFE (6/11) [2021-07-06 10:12:46,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.07 10:12:46 BoogieIcfgContainer [2021-07-06 10:12:46,036 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-06 10:12:46,037 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-07-06 10:12:46,037 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-07-06 10:12:46,037 INFO L275 PluginConnector]: Witness Printer initialized [2021-07-06 10:12:46,038 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.07 10:12:42" (3/4) ... [2021-07-06 10:12:46,039 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-07-06 10:12:46,062 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-07-06 10:12:46,062 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-07-06 10:12:46,063 INFO L168 Benchmark]: Toolchain (without parser) took 4110.56 ms. Allocated memory was 54.5 MB in the beginning and 88.1 MB in the end (delta: 33.6 MB). Free memory was 31.7 MB in the beginning and 26.3 MB in the end (delta: 5.4 MB). Peak memory consumption was 37.8 MB. Max. memory is 16.1 GB. [2021-07-06 10:12:46,063 INFO L168 Benchmark]: CDTParser took 0.49 ms. Allocated memory is still 54.5 MB. Free memory was 35.9 MB in the beginning and 35.8 MB in the end (delta: 38.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-07-06 10:12:46,064 INFO L168 Benchmark]: CACSL2BoogieTranslator took 236.33 ms. Allocated memory was 54.5 MB in the beginning and 73.4 MB in the end (delta: 18.9 MB). Free memory was 31.5 MB in the beginning and 57.0 MB in the end (delta: -25.5 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. [2021-07-06 10:12:46,064 INFO L168 Benchmark]: Boogie Preprocessor took 48.10 ms. Allocated memory is still 73.4 MB. Free memory was 56.8 MB in the beginning and 55.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-07-06 10:12:46,064 INFO L168 Benchmark]: RCFGBuilder took 483.07 ms. Allocated memory is still 73.4 MB. Free memory was 55.2 MB in the beginning and 53.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 20.4 MB. Max. memory is 16.1 GB. [2021-07-06 10:12:46,064 INFO L168 Benchmark]: TraceAbstraction took 3311.79 ms. Allocated memory was 73.4 MB in the beginning and 88.1 MB in the end (delta: 14.7 MB). Free memory was 53.4 MB in the beginning and 27.5 MB in the end (delta: 25.8 MB). Peak memory consumption was 41.2 MB. Max. memory is 16.1 GB. [2021-07-06 10:12:46,064 INFO L168 Benchmark]: Witness Printer took 25.48 ms. Allocated memory is still 88.1 MB. Free memory was 27.5 MB in the beginning and 26.3 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-07-06 10:12:46,069 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.49 ms. Allocated memory is still 54.5 MB. Free memory was 35.9 MB in the beginning and 35.8 MB in the end (delta: 38.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 236.33 ms. Allocated memory was 54.5 MB in the beginning and 73.4 MB in the end (delta: 18.9 MB). Free memory was 31.5 MB in the beginning and 57.0 MB in the end (delta: -25.5 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 48.10 ms. Allocated memory is still 73.4 MB. Free memory was 56.8 MB in the beginning and 55.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 483.07 ms. Allocated memory is still 73.4 MB. Free memory was 55.2 MB in the beginning and 53.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 20.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3311.79 ms. Allocated memory was 73.4 MB in the beginning and 88.1 MB in the end (delta: 14.7 MB). Free memory was 53.4 MB in the beginning and 27.5 MB in the end (delta: 25.8 MB). Peak memory consumption was 41.2 MB. Max. memory is 16.1 GB. * Witness Printer took 25.48 ms. Allocated memory is still 88.1 MB. Free memory was 27.5 MB in the beginning and 26.3 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 14]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 14]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 23]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 23]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 23]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - CounterExampleResult [Line: 23]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L32] int i, b[100]; [L33] i = 0 VAL [b={3:0}, i=0] [L33] COND TRUE i < 100 VAL [b={3:0}, i=0] [L34] CALL foo(i, b, i + 1) VAL [\old(n)=0, \old(size)=1, b={3:0}] [L21] int a[n], i; [L22] i = 0 VAL [\old(n)=0, \old(size)=1, a={2:0}, b={3:0}, b={3:0}, i=0, n=0, size=1] [L22] COND TRUE i < size VAL [\old(n)=0, \old(size)=1, a={2:0}, b={3:0}, b={3:0}, i=0, n=0, size=1] [L23] EXPR b[i] VAL [\old(n)=0, \old(size)=1, a={2:0}, b={3:0}, b={3:0}, b[i]=402, i=0, n=0, size=1] [L23] a[i] = b[i] - StatisticsResult: Ultimate Automizer benchmark data for error location: barErr0REQUIRES_VIOLATION CFG has 5 procedures, 52 locations, 11 error locations. Started 1 CEGAR loops. OverallTime: 711.7ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 12.6ms, AutomataDifference: 283.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 76 SDtfs, 38 SDslu, 50 SDs, 0 SdLazy, 105 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 139.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 85.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred in iteration=0, InterpolantAutomatonStates: 9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 20.4ms AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 9.0ms SsaConstructionTime, 51.0ms SatisfiabilityAnalysisTime, 187.8ms InterpolantComputationTime, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 26 ConstructedInterpolants, 0 QuantifiedInterpolants, 64 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for error location: barErr1REQUIRES_VIOLATION CFG has 5 procedures, 52 locations, 11 error locations. Started 1 CEGAR loops. OverallTime: 619.7ms, OverallIterations: 3, TraceHistogramMax: 1, EmptinessCheckTime: 4.9ms, AutomataDifference: 320.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 1.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 82 SDtfs, 42 SDslu, 73 SDs, 0 SdLazy, 156 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 167.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 110.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred in iteration=0, InterpolantAutomatonStates: 16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 11.3ms AutomataMinimizationTime, 3 MinimizatonAttempts, 8 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 4.3ms SsaConstructionTime, 52.7ms SatisfiabilityAnalysisTime, 188.9ms InterpolantComputationTime, 47 NumberOfCodeBlocks, 47 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 44 ConstructedInterpolants, 0 QuantifiedInterpolants, 122 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 1/1 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for error location: fooErr0REQUIRES_VIOLATION CFG has 5 procedures, 52 locations, 11 error locations. Started 1 CEGAR loops. OverallTime: 237.3ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 1.1ms, AutomataDifference: 147.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 1.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 39 SDtfs, 39 SDslu, 53 SDs, 0 SdLazy, 130 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 87.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 36.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred in iteration=0, InterpolantAutomatonStates: 6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 0.6ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 3.5ms SsaConstructionTime, 21.1ms SatisfiabilityAnalysisTime, 52.2ms InterpolantComputationTime, 11 NumberOfCodeBlocks, 11 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 39 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for error location: fooErr1REQUIRES_VIOLATION CFG has 5 procedures, 52 locations, 11 error locations. Started 1 CEGAR loops. OverallTime: 1507.0ms, OverallIterations: 4, TraceHistogramMax: 2, EmptinessCheckTime: 8.8ms, AutomataDifference: 515.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 4.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 110 SDtfs, 133 SDslu, 259 SDs, 0 SdLazy, 451 SolverSat, 42 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 291.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 292.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred in iteration=0, InterpolantAutomatonStates: 27, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 23.1ms AutomataMinimizationTime, 4 MinimizatonAttempts, 36 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 13.7ms SsaConstructionTime, 58.1ms SatisfiabilityAnalysisTime, 579.4ms InterpolantComputationTime, 106 NumberOfCodeBlocks, 106 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 101 ConstructedInterpolants, 0 QuantifiedInterpolants, 420 SizeOfPredicates, 3 NumberOfNonLiveVariables, 88 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 5 InterpolantComputations, 4 PerfectInterpolantSequences, 14/15 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for error location: fooErr2REQUIRES_VIOLATION CFG has 5 procedures, 52 locations, 11 error locations. Started 1 CEGAR loops. OverallTime: 122.8ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 1.1ms, AutomataDifference: 73.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 1.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 44 SDtfs, 18 SDslu, 24 SDs, 0 SdLazy, 73 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 49.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred in iteration=0, InterpolantAutomatonStates: 4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 0.5ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2.3ms SsaConstructionTime, 4.5ms SatisfiabilityAnalysisTime, 32.4ms InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 11 ConstructedInterpolants, 0 QuantifiedInterpolants, 32 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for error location: fooErr3REQUIRES_VIOLATION CFG has 5 procedures, 52 locations, 11 error locations. Started 1 CEGAR loops. OverallTime: 40.7ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 0.5ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 0.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.7ms SsaConstructionTime, 4.3ms SatisfiabilityAnalysisTime, 0.0ms InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-07-06 10:12:46,107 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...