./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety-ext3/scopes4-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version f6fb2bb1 Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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/memsafety-ext3/scopes4-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.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 87dcbb1d4539995e5aba39e6053775ca0fac811e .................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- Skipped default analysis because property is memsafety ### Bit-precise run ### This is Ultimate 0.1.24-f6fb2bb [2019-11-19 19:51:04,590 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-19 19:51:04,593 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-19 19:51:04,607 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-19 19:51:04,607 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-19 19:51:04,609 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-19 19:51:04,610 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-19 19:51:04,613 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-19 19:51:04,615 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-19 19:51:04,616 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-19 19:51:04,617 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-19 19:51:04,618 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-19 19:51:04,618 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-19 19:51:04,620 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-19 19:51:04,621 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-19 19:51:04,622 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-19 19:51:04,623 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-19 19:51:04,624 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-19 19:51:04,626 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-19 19:51:04,628 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-19 19:51:04,630 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-19 19:51:04,632 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-19 19:51:04,633 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-19 19:51:04,634 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-19 19:51:04,637 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-19 19:51:04,638 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-19 19:51:04,638 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-19 19:51:04,639 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-19 19:51:04,640 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-19 19:51:04,641 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-19 19:51:04,641 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-19 19:51:04,642 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-19 19:51:04,643 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-19 19:51:04,644 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-19 19:51:04,646 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-19 19:51:04,646 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-19 19:51:04,647 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-19 19:51:04,647 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-19 19:51:04,648 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-19 19:51:04,649 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-19 19:51:04,650 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-19 19:51:04,650 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2019-11-19 19:51:04,665 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-19 19:51:04,666 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-19 19:51:04,667 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-19 19:51:04,667 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-19 19:51:04,668 INFO L138 SettingsManager]: * Use SBE=true [2019-11-19 19:51:04,668 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-19 19:51:04,668 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-19 19:51:04,669 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-19 19:51:04,669 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-19 19:51:04,669 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-19 19:51:04,669 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-19 19:51:04,670 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-19 19:51:04,670 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-19 19:51:04,670 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-19 19:51:04,671 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-19 19:51:04,671 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-19 19:51:04,671 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-19 19:51:04,671 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-19 19:51:04,672 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-19 19:51:04,672 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-19 19:51:04,672 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-19 19:51:04,673 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-19 19:51:04,673 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-19 19:51:04,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-19 19:51:04,674 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-19 19:51:04,674 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-19 19:51:04,674 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-19 19:51:04,674 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-19 19:51:04,675 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-19 19:51:04,675 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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 -> 87dcbb1d4539995e5aba39e6053775ca0fac811e [2019-11-19 19:51:05,046 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-19 19:51:05,059 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-19 19:51:05,063 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-19 19:51:05,064 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-19 19:51:05,065 INFO L275 PluginConnector]: CDTParser initialized [2019-11-19 19:51:05,066 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-ext3/scopes4-1.c [2019-11-19 19:51:05,128 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b91c255cf/e62a4edbd97246ed88656c72792bc69c/FLAG1f8dd12f9 [2019-11-19 19:51:05,545 INFO L306 CDTParser]: Found 1 translation units. [2019-11-19 19:51:05,546 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-ext3/scopes4-1.c [2019-11-19 19:51:05,552 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b91c255cf/e62a4edbd97246ed88656c72792bc69c/FLAG1f8dd12f9 [2019-11-19 19:51:05,895 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b91c255cf/e62a4edbd97246ed88656c72792bc69c [2019-11-19 19:51:05,899 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-19 19:51:05,901 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-19 19:51:05,902 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-19 19:51:05,903 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-19 19:51:05,906 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-19 19:51:05,907 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:51:05" (1/1) ... [2019-11-19 19:51:05,910 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@293bf2a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:51:05, skipping insertion in model container [2019-11-19 19:51:05,911 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:51:05" (1/1) ... [2019-11-19 19:51:05,919 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-19 19:51:05,935 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-19 19:51:06,186 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 19:51:06,212 INFO L188 MainTranslator]: Completed pre-run [2019-11-19 19:51:06,233 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 19:51:06,259 INFO L192 MainTranslator]: Completed translation [2019-11-19 19:51:06,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:51:06 WrapperNode [2019-11-19 19:51:06,261 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-19 19:51:06,262 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-19 19:51:06,262 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-19 19:51:06,262 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-19 19:51:06,332 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:51:06" (1/1) ... [2019-11-19 19:51:06,332 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:51:06" (1/1) ... [2019-11-19 19:51:06,344 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:51:06" (1/1) ... [2019-11-19 19:51:06,344 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:51:06" (1/1) ... [2019-11-19 19:51:06,355 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:51:06" (1/1) ... [2019-11-19 19:51:06,356 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:51:06" (1/1) ... [2019-11-19 19:51:06,358 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:51:06" (1/1) ... [2019-11-19 19:51:06,364 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-19 19:51:06,365 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-19 19:51:06,365 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-19 19:51:06,365 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-19 19:51:06,366 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:51:06" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-19 19:51:06,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-19 19:51:06,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-19 19:51:06,433 INFO L138 BoogieDeclarations]: Found implementation of procedure foo2 [2019-11-19 19:51:06,434 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2019-11-19 19:51:06,434 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-19 19:51:06,434 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-11-19 19:51:06,434 INFO L130 BoogieDeclarations]: Found specification of procedure foo2 [2019-11-19 19:51:06,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-19 19:51:06,434 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2019-11-19 19:51:06,434 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-19 19:51:06,435 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-19 19:51:06,435 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-19 19:51:06,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-19 19:51:06,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2019-11-19 19:51:06,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-19 19:51:06,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2019-11-19 19:51:06,436 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2019-11-19 19:51:06,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-19 19:51:06,761 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-19 19:51:06,761 INFO L285 CfgBuilder]: Removed 0 assume(true) statements. [2019-11-19 19:51:06,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:51:06 BoogieIcfgContainer [2019-11-19 19:51:06,763 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-19 19:51:06,764 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-19 19:51:06,764 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-19 19:51:06,767 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-19 19:51:06,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:51:05" (1/3) ... [2019-11-19 19:51:06,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7be11e73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:51:06, skipping insertion in model container [2019-11-19 19:51:06,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:51:06" (2/3) ... [2019-11-19 19:51:06,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7be11e73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:51:06, skipping insertion in model container [2019-11-19 19:51:06,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:51:06" (3/3) ... [2019-11-19 19:51:06,771 INFO L109 eAbstractionObserver]: Analyzing ICFG scopes4-1.c [2019-11-19 19:51:06,781 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-19 19:51:06,787 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2019-11-19 19:51:06,797 INFO L249 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2019-11-19 19:51:06,818 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-19 19:51:06,818 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-19 19:51:06,818 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-19 19:51:06,819 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-19 19:51:06,819 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-19 19:51:06,819 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-19 19:51:06,819 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-19 19:51:06,819 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-19 19:51:06,834 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2019-11-19 19:51:06,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-19 19:51:06,844 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 19:51:06,845 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 19:51:06,845 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, foo2Err0REQUIRES_VIOLATION, foo2Err1REQUIRES_VIOLATION]=== [2019-11-19 19:51:06,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 19:51:06,852 INFO L82 PathProgramCache]: Analyzing trace with hash 354125337, now seen corresponding path program 1 times [2019-11-19 19:51:06,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 19:51:06,862 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [357661713] [2019-11-19 19:51:06,863 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 19:51:07,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 19:51:07,008 INFO L255 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-19 19:51:07,014 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 19:51:07,155 INFO L343 Elim1Store]: treesize reduction 27, result has 50.9 percent of original size [2019-11-19 19:51:07,156 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2019-11-19 19:51:07,158 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 19:51:07,193 INFO L567 ElimStorePlain]: treesize reduction 10, result has 69.7 percent of original size [2019-11-19 19:51:07,195 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-19 19:51:07,200 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 19:51:07,201 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:23 [2019-11-19 19:51:07,202 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-19 19:51:07,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 19:51:07,232 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 19:51:07,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 19:51:07,278 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [357661713] [2019-11-19 19:51:07,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 19:51:07,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-19 19:51:07,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662485981] [2019-11-19 19:51:07,284 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-19 19:51:07,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 19:51:07,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-19 19:51:07,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-19 19:51:07,301 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 3 states. [2019-11-19 19:51:07,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 19:51:07,342 INFO L93 Difference]: Finished difference Result 24 states and 23 transitions. [2019-11-19 19:51:07,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-19 19:51:07,344 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-19 19:51:07,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 19:51:07,354 INFO L225 Difference]: With dead ends: 24 [2019-11-19 19:51:07,355 INFO L226 Difference]: Without dead ends: 19 [2019-11-19 19:51:07,357 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-19 19:51:07,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-19 19:51:07,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-11-19 19:51:07,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-19 19:51:07,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 18 transitions. [2019-11-19 19:51:07,397 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 18 transitions. Word has length 8 [2019-11-19 19:51:07,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 19:51:07,398 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 18 transitions. [2019-11-19 19:51:07,398 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-19 19:51:07,399 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 18 transitions. [2019-11-19 19:51:07,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-19 19:51:07,400 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 19:51:07,400 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 19:51:07,603 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 19:51:07,603 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, foo2Err0REQUIRES_VIOLATION, foo2Err1REQUIRES_VIOLATION]=== [2019-11-19 19:51:07,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 19:51:07,604 INFO L82 PathProgramCache]: Analyzing trace with hash 354125338, now seen corresponding path program 1 times [2019-11-19 19:51:07,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 19:51:07,605 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1314233926] [2019-11-19 19:51:07,605 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 19:51:07,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 19:51:07,706 INFO L255 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-19 19:51:07,708 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 19:51:07,720 INFO L392 ElimStorePlain]: Different costs {0=[|v_#length_15|], 2=[|v_#valid_22|]} [2019-11-19 19:51:07,730 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 19:51:07,733 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2019-11-19 19:51:07,733 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 19:51:07,745 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 19:51:07,751 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 19:51:07,760 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2019-11-19 19:51:07,760 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-19 19:51:07,772 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 19:51:07,773 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 19:51:07,773 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:24, output treesize:14 [2019-11-19 19:51:07,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 19:51:07,806 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 19:51:07,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 19:51:07,932 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1314233926] [2019-11-19 19:51:07,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 19:51:07,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-11-19 19:51:07,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212521944] [2019-11-19 19:51:07,935 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-19 19:51:07,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 19:51:07,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-19 19:51:07,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-19 19:51:07,938 INFO L87 Difference]: Start difference. First operand 19 states and 18 transitions. Second operand 4 states. [2019-11-19 19:51:07,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 19:51:07,960 INFO L93 Difference]: Finished difference Result 18 states and 17 transitions. [2019-11-19 19:51:07,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-19 19:51:07,962 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-11-19 19:51:07,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 19:51:07,963 INFO L225 Difference]: With dead ends: 18 [2019-11-19 19:51:07,963 INFO L226 Difference]: Without dead ends: 18 [2019-11-19 19:51:07,964 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-19 19:51:07,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-19 19:51:07,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-19 19:51:07,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-19 19:51:07,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 17 transitions. [2019-11-19 19:51:07,968 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 17 transitions. Word has length 8 [2019-11-19 19:51:07,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 19:51:07,968 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 17 transitions. [2019-11-19 19:51:07,969 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-19 19:51:07,969 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 17 transitions. [2019-11-19 19:51:07,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-19 19:51:07,970 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 19:51:07,970 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 19:51:08,172 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 19:51:08,173 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, foo2Err0REQUIRES_VIOLATION, foo2Err1REQUIRES_VIOLATION]=== [2019-11-19 19:51:08,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 19:51:08,173 INFO L82 PathProgramCache]: Analyzing trace with hash 2146229308, now seen corresponding path program 1 times [2019-11-19 19:51:08,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 19:51:08,174 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [881552427] [2019-11-19 19:51:08,174 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 19:51:08,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 19:51:08,284 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-19 19:51:08,286 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 19:51:08,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 19:51:08,369 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 19:51:08,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 19:51:08,539 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [881552427] [2019-11-19 19:51:08,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 19:51:08,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2019-11-19 19:51:08,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479926817] [2019-11-19 19:51:08,542 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-19 19:51:08,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 19:51:08,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-19 19:51:08,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-11-19 19:51:08,546 INFO L87 Difference]: Start difference. First operand 18 states and 17 transitions. Second operand 11 states. [2019-11-19 19:51:08,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 19:51:08,739 INFO L93 Difference]: Finished difference Result 17 states and 16 transitions. [2019-11-19 19:51:08,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-19 19:51:08,740 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2019-11-19 19:51:08,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 19:51:08,742 INFO L225 Difference]: With dead ends: 17 [2019-11-19 19:51:08,742 INFO L226 Difference]: Without dead ends: 17 [2019-11-19 19:51:08,743 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-11-19 19:51:08,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-19 19:51:08,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-19 19:51:08,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-19 19:51:08,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 16 transitions. [2019-11-19 19:51:08,747 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 16 transitions. Word has length 16 [2019-11-19 19:51:08,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 19:51:08,748 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 16 transitions. [2019-11-19 19:51:08,748 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-19 19:51:08,748 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 16 transitions. [2019-11-19 19:51:08,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-19 19:51:08,749 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 19:51:08,749 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 19:51:08,952 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 19:51:08,953 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, foo2Err0REQUIRES_VIOLATION, foo2Err1REQUIRES_VIOLATION]=== [2019-11-19 19:51:08,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 19:51:08,953 INFO L82 PathProgramCache]: Analyzing trace with hash 2146229309, now seen corresponding path program 1 times [2019-11-19 19:51:08,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 19:51:08,954 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1928377715] [2019-11-19 19:51:08,955 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 19:51:09,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 19:51:09,075 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-19 19:51:09,078 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 19:51:09,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 19:51:09,270 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 19:51:09,593 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-19 19:51:09,624 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2019-11-19 19:51:09,625 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 19:51:09,636 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2019-11-19 19:51:09,637 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 19:51:09,651 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2019-11-19 19:51:09,653 INFO L496 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 19:51:09,719 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 19:51:09,721 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 3 xjuncts. [2019-11-19 19:51:09,721 INFO L221 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:47, output treesize:39 [2019-11-19 19:51:10,359 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-19 19:51:10,381 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2019-11-19 19:51:10,382 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 19:51:10,398 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2019-11-19 19:51:10,400 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 19:51:10,568 WARN L191 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2019-11-19 19:51:10,569 INFO L567 ElimStorePlain]: treesize reduction 28, result has 56.3 percent of original size [2019-11-19 19:51:10,571 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2019-11-19 19:51:10,571 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:72, output treesize:36 [2019-11-19 19:51:11,042 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2019-11-19 19:51:11,043 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 19:51:11,061 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2019-11-19 19:51:11,062 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 19:51:11,230 WARN L191 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2019-11-19 19:51:11,231 INFO L567 ElimStorePlain]: treesize reduction 28, result has 56.3 percent of original size [2019-11-19 19:51:11,232 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2019-11-19 19:51:11,232 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:72, output treesize:36 [2019-11-19 19:51:11,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 19:51:11,292 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1928377715] [2019-11-19 19:51:11,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 19:51:11,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 15 [2019-11-19 19:51:11,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612437236] [2019-11-19 19:51:11,294 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-19 19:51:11,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 19:51:11,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-19 19:51:11,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2019-11-19 19:51:11,295 INFO L87 Difference]: Start difference. First operand 17 states and 16 transitions. Second operand 16 states. [2019-11-19 19:51:11,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 19:51:11,724 INFO L93 Difference]: Finished difference Result 16 states and 15 transitions. [2019-11-19 19:51:11,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-19 19:51:11,724 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2019-11-19 19:51:11,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 19:51:11,725 INFO L225 Difference]: With dead ends: 16 [2019-11-19 19:51:11,725 INFO L226 Difference]: Without dead ends: 0 [2019-11-19 19:51:11,726 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2019-11-19 19:51:11,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-19 19:51:11,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-19 19:51:11,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-19 19:51:11,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-19 19:51:11,727 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2019-11-19 19:51:11,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 19:51:11,727 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-19 19:51:11,727 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-19 19:51:11,727 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-19 19:51:11,727 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-19 19:51:11,929 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 19:51:11,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 07:51:11 BoogieIcfgContainer [2019-11-19 19:51:11,936 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-19 19:51:11,937 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-19 19:51:11,937 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-19 19:51:11,937 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-19 19:51:11,937 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:51:06" (3/4) ... [2019-11-19 19:51:11,941 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-19 19:51:11,948 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2019-11-19 19:51:11,948 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure foo [2019-11-19 19:51:11,949 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2019-11-19 19:51:11,949 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure foo2 [2019-11-19 19:51:11,953 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2019-11-19 19:51:11,954 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2019-11-19 19:51:11,954 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-19 19:51:11,954 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2019-11-19 19:51:11,997 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-19 19:51:11,997 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-19 19:51:11,999 INFO L168 Benchmark]: Toolchain (without parser) took 6098.25 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 76.0 MB). Free memory was 960.4 MB in the beginning and 792.2 MB in the end (delta: 168.1 MB). Peak memory consumption was 244.1 MB. Max. memory is 11.5 GB. [2019-11-19 19:51:11,999 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 19:51:12,000 INFO L168 Benchmark]: CACSL2BoogieTranslator took 359.16 ms. Allocated memory is still 1.0 GB. Free memory was 960.4 MB in the beginning and 949.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-19 19:51:12,001 INFO L168 Benchmark]: Boogie Preprocessor took 103.05 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 76.0 MB). Free memory was 949.6 MB in the beginning and 1.1 GB in the end (delta: -115.5 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2019-11-19 19:51:12,002 INFO L168 Benchmark]: RCFGBuilder took 397.85 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 11.5 GB. [2019-11-19 19:51:12,002 INFO L168 Benchmark]: TraceAbstraction took 5172.21 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 792.2 MB in the end (delta: 251.9 MB). Peak memory consumption was 251.9 MB. Max. memory is 11.5 GB. [2019-11-19 19:51:12,003 INFO L168 Benchmark]: Witness Printer took 60.77 ms. Allocated memory is still 1.1 GB. Free memory is still 792.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 19:51:12,006 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 359.16 ms. Allocated memory is still 1.0 GB. Free memory was 960.4 MB in the beginning and 949.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 103.05 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 76.0 MB). Free memory was 949.6 MB in the beginning and 1.1 GB in the end (delta: -115.5 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 397.85 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 5172.21 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 792.2 MB in the end (delta: 251.9 MB). Peak memory consumption was 251.9 MB. Max. memory is 11.5 GB. * Witness Printer took 60.77 ms. Allocated memory is still 1.1 GB. Free memory is still 792.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 18]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 18]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 6]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 6]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 5 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 26 locations, 5 error locations. Result: SAFE, OverallTime: 5.1s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 54 SDtfs, 52 SDslu, 64 SDs, 0 SdLazy, 184 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 96 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.9s InterpolantComputationTime, 48 NumberOfCodeBlocks, 48 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 88 ConstructedInterpolants, 16 QuantifiedInterpolants, 12241 SizeOfPredicates, 20 NumberOfNonLiveVariables, 246 ConjunctsInSsa, 26 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...