./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/termination-crafted/SyntaxSupportPointer01-1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 678e0110 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/termination-crafted/SyntaxSupportPointer01-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-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 64bit --witnessprinter.graph.data.programhash f2a8d3919c0496882213752e07135061fdbafdf6 ......................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.1.24-678e011 [2019-11-19 22:16:22,419 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-19 22:16:22,422 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-19 22:16:22,441 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-19 22:16:22,441 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-19 22:16:22,444 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-19 22:16:22,446 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-19 22:16:22,459 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-19 22:16:22,461 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-19 22:16:22,464 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-19 22:16:22,466 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-19 22:16:22,469 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-19 22:16:22,469 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-19 22:16:22,473 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-19 22:16:22,474 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-19 22:16:22,476 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-19 22:16:22,478 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-19 22:16:22,479 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-19 22:16:22,480 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-19 22:16:22,482 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-19 22:16:22,484 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-19 22:16:22,485 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-19 22:16:22,486 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-19 22:16:22,487 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-19 22:16:22,490 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-19 22:16:22,490 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-19 22:16:22,490 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-19 22:16:22,491 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-19 22:16:22,491 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-19 22:16:22,494 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-19 22:16:22,496 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-19 22:16:22,497 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-19 22:16:22,498 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-19 22:16:22,499 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-19 22:16:22,500 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-19 22:16:22,502 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-19 22:16:22,503 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-19 22:16:22,504 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-19 22:16:22,504 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-19 22:16:22,505 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-19 22:16:22,506 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-19 22:16:22,507 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Bitvector.epf [2019-11-19 22:16:22,530 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-19 22:16:22,530 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-19 22:16:22,533 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-19 22:16:22,533 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-19 22:16:22,533 INFO L138 SettingsManager]: * Use SBE=true [2019-11-19 22:16:22,533 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-19 22:16:22,534 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-19 22:16:22,534 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-19 22:16:22,534 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-19 22:16:22,534 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-19 22:16:22,536 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-19 22:16:22,536 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-19 22:16:22,536 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-19 22:16:22,537 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-19 22:16:22,537 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-19 22:16:22,537 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-19 22:16:22,537 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-19 22:16:22,538 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-19 22:16:22,538 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-19 22:16:22,538 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-19 22:16:22,539 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-19 22:16:22,539 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-19 22:16:22,539 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-19 22:16:22,540 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-19 22:16:22,540 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-19 22:16:22,540 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-19 22:16:22,540 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 -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f2a8d3919c0496882213752e07135061fdbafdf6 [2019-11-19 22:16:22,885 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-19 22:16:22,908 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-19 22:16:22,913 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-19 22:16:22,914 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-19 22:16:22,915 INFO L275 PluginConnector]: CDTParser initialized [2019-11-19 22:16:22,915 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/SyntaxSupportPointer01-1.c [2019-11-19 22:16:22,978 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c56c12b1c/474d5fb49ab34b7e80c7c4ffd5e523ad/FLAG0e7f30f62 [2019-11-19 22:16:23,415 INFO L306 CDTParser]: Found 1 translation units. [2019-11-19 22:16:23,417 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/SyntaxSupportPointer01-1.c [2019-11-19 22:16:23,423 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c56c12b1c/474d5fb49ab34b7e80c7c4ffd5e523ad/FLAG0e7f30f62 [2019-11-19 22:16:23,808 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c56c12b1c/474d5fb49ab34b7e80c7c4ffd5e523ad [2019-11-19 22:16:23,812 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-19 22:16:23,813 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-19 22:16:23,816 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-19 22:16:23,816 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-19 22:16:23,819 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-19 22:16:23,820 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 10:16:23" (1/1) ... [2019-11-19 22:16:23,823 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@261ad4ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:16:23, skipping insertion in model container [2019-11-19 22:16:23,824 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 10:16:23" (1/1) ... [2019-11-19 22:16:23,830 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-19 22:16:23,846 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-19 22:16:24,011 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 22:16:24,025 INFO L188 MainTranslator]: Completed pre-run [2019-11-19 22:16:24,040 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 22:16:24,057 INFO L192 MainTranslator]: Completed translation [2019-11-19 22:16:24,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:16:24 WrapperNode [2019-11-19 22:16:24,058 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-19 22:16:24,058 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-19 22:16:24,059 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-19 22:16:24,059 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-19 22:16:24,125 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:16:24" (1/1) ... [2019-11-19 22:16:24,125 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:16:24" (1/1) ... [2019-11-19 22:16:24,134 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:16:24" (1/1) ... [2019-11-19 22:16:24,134 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:16:24" (1/1) ... [2019-11-19 22:16:24,144 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:16:24" (1/1) ... [2019-11-19 22:16:24,148 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:16:24" (1/1) ... [2019-11-19 22:16:24,150 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:16:24" (1/1) ... [2019-11-19 22:16:24,152 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-19 22:16:24,153 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-19 22:16:24,153 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-19 22:16:24,153 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-19 22:16:24,154 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:16:24" (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 22:16:24,207 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-19 22:16:24,207 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-19 22:16:24,207 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-19 22:16:24,207 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-19 22:16:24,208 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-19 22:16:24,208 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-19 22:16:24,208 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-19 22:16:24,209 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-19 22:16:24,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-19 22:16:24,209 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-19 22:16:24,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-19 22:16:24,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-19 22:16:24,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-19 22:16:24,458 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-19 22:16:24,458 INFO L285 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-19 22:16:24,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 10:16:24 BoogieIcfgContainer [2019-11-19 22:16:24,460 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-19 22:16:24,468 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-19 22:16:24,472 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-19 22:16:24,480 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-19 22:16:24,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 10:16:23" (1/3) ... [2019-11-19 22:16:24,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66ca0a21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 10:16:24, skipping insertion in model container [2019-11-19 22:16:24,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:16:24" (2/3) ... [2019-11-19 22:16:24,486 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66ca0a21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 10:16:24, skipping insertion in model container [2019-11-19 22:16:24,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 10:16:24" (3/3) ... [2019-11-19 22:16:24,492 INFO L109 eAbstractionObserver]: Analyzing ICFG SyntaxSupportPointer01-1.c [2019-11-19 22:16:24,521 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-19 22:16:24,537 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 12 error locations. [2019-11-19 22:16:24,565 INFO L249 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2019-11-19 22:16:24,594 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-19 22:16:24,594 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-19 22:16:24,594 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-19 22:16:24,594 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-19 22:16:24,594 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-19 22:16:24,595 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-19 22:16:24,595 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-19 22:16:24,595 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-19 22:16:24,610 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2019-11-19 22:16:24,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-19 22:16:24,620 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:16:24,621 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:16:24,622 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr11ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION]=== [2019-11-19 22:16:24,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:16:24,628 INFO L82 PathProgramCache]: Analyzing trace with hash -522028180, now seen corresponding path program 1 times [2019-11-19 22:16:24,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 22:16:24,638 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1921059478] [2019-11-19 22:16:24,638 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 22:16:24,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:16:24,728 INFO L255 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-19 22:16:24,735 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:16:24,804 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-19 22:16:24,804 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:16:24,813 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:16:24,813 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:16:24,814 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-19 22:16:24,826 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 22:16:24,826 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 22:16:24,846 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 22:16:24,847 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1921059478] [2019-11-19 22:16:24,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 22:16:24,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-19 22:16:24,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235345574] [2019-11-19 22:16:24,853 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-19 22:16:24,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 22:16:24,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-19 22:16:24,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-19 22:16:24,867 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2019-11-19 22:16:24,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:16:24,969 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2019-11-19 22:16:24,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-19 22:16:24,970 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2019-11-19 22:16:24,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:16:24,978 INFO L225 Difference]: With dead ends: 28 [2019-11-19 22:16:24,978 INFO L226 Difference]: Without dead ends: 25 [2019-11-19 22:16:24,979 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 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 22:16:24,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-19 22:16:25,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-11-19 22:16:25,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-19 22:16:25,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2019-11-19 22:16:25,018 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 7 [2019-11-19 22:16:25,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:16:25,018 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2019-11-19 22:16:25,019 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-19 22:16:25,019 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2019-11-19 22:16:25,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-19 22:16:25,019 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:16:25,020 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:16:25,222 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 22:16:25,222 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr11ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION]=== [2019-11-19 22:16:25,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:16:25,223 INFO L82 PathProgramCache]: Analyzing trace with hash -522028179, now seen corresponding path program 1 times [2019-11-19 22:16:25,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 22:16:25,223 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2122732572] [2019-11-19 22:16:25,223 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 22:16:25,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:16:25,301 INFO L255 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-19 22:16:25,303 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:16:25,316 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-19 22:16:25,317 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:16:25,324 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:16:25,325 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:16:25,325 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-19 22:16:25,343 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 22:16:25,343 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 22:16:25,380 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 22:16:25,380 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2122732572] [2019-11-19 22:16:25,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 22:16:25,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-11-19 22:16:25,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891721995] [2019-11-19 22:16:25,383 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-19 22:16:25,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 22:16:25,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-19 22:16:25,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-19 22:16:25,384 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 4 states. [2019-11-19 22:16:25,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:16:25,433 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2019-11-19 22:16:25,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-19 22:16:25,436 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-11-19 22:16:25,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:16:25,437 INFO L225 Difference]: With dead ends: 20 [2019-11-19 22:16:25,438 INFO L226 Difference]: Without dead ends: 20 [2019-11-19 22:16:25,438 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 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 22:16:25,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-19 22:16:25,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-19 22:16:25,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-19 22:16:25,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2019-11-19 22:16:25,448 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 7 [2019-11-19 22:16:25,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:16:25,450 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2019-11-19 22:16:25,451 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-19 22:16:25,451 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2019-11-19 22:16:25,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-19 22:16:25,453 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:16:25,453 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:16:25,654 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 22:16:25,655 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr11ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION]=== [2019-11-19 22:16:25,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:16:25,656 INFO L82 PathProgramCache]: Analyzing trace with hash -141661244, now seen corresponding path program 1 times [2019-11-19 22:16:25,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 22:16:25,659 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [610437230] [2019-11-19 22:16:25,659 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 22:16:25,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:16:25,759 INFO L255 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-19 22:16:25,761 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:16:25,786 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 22:16:25,786 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 22:16:25,814 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 22:16:25,815 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [610437230] [2019-11-19 22:16:25,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 22:16:25,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 2] imperfect sequences [] total 4 [2019-11-19 22:16:25,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159258816] [2019-11-19 22:16:25,816 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-19 22:16:25,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 22:16:25,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-19 22:16:25,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-19 22:16:25,817 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 5 states. [2019-11-19 22:16:25,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:16:25,863 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2019-11-19 22:16:25,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-19 22:16:25,864 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-11-19 22:16:25,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:16:25,866 INFO L225 Difference]: With dead ends: 19 [2019-11-19 22:16:25,866 INFO L226 Difference]: Without dead ends: 19 [2019-11-19 22:16:25,866 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-19 22:16:25,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-19 22:16:25,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-11-19 22:16:25,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-19 22:16:25,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2019-11-19 22:16:25,870 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 12 [2019-11-19 22:16:25,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:16:25,871 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2019-11-19 22:16:25,871 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-19 22:16:25,871 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2019-11-19 22:16:25,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-19 22:16:25,871 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:16:25,872 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:16:26,073 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 22:16:26,075 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr11ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION]=== [2019-11-19 22:16:26,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:16:26,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1302500167, now seen corresponding path program 1 times [2019-11-19 22:16:26,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 22:16:26,077 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [307724981] [2019-11-19 22:16:26,077 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 22:16:26,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:16:26,145 INFO L255 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-19 22:16:26,146 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:16:26,153 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-19 22:16:26,153 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:16:26,155 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:16:26,155 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:16:26,156 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-19 22:16:26,225 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 22:16:26,225 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 22:16:30,318 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 22:16:30,318 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [307724981] [2019-11-19 22:16:30,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 22:16:30,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2019-11-19 22:16:30,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883915562] [2019-11-19 22:16:30,319 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-19 22:16:30,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 22:16:30,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-19 22:16:30,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=36, Unknown=2, NotChecked=0, Total=56 [2019-11-19 22:16:30,320 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 8 states. [2019-11-19 22:16:30,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:16:30,464 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2019-11-19 22:16:30,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-19 22:16:30,467 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2019-11-19 22:16:30,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:16:30,467 INFO L225 Difference]: With dead ends: 18 [2019-11-19 22:16:30,467 INFO L226 Difference]: Without dead ends: 0 [2019-11-19 22:16:30,468 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=30, Invalid=58, Unknown=2, NotChecked=0, Total=90 [2019-11-19 22:16:30,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-19 22:16:30,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-19 22:16:30,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-19 22:16:30,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-19 22:16:30,469 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2019-11-19 22:16:30,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:16:30,469 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-19 22:16:30,469 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-19 22:16:30,469 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-19 22:16:30,470 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-19 22:16:30,671 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 22:16:30,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 10:16:30 BoogieIcfgContainer [2019-11-19 22:16:30,677 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-19 22:16:30,678 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-19 22:16:30,678 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-19 22:16:30,678 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-19 22:16:30,679 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 10:16:24" (3/4) ... [2019-11-19 22:16:30,683 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-19 22:16:30,691 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2019-11-19 22:16:30,692 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2019-11-19 22:16:30,701 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2019-11-19 22:16:30,701 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2019-11-19 22:16:30,702 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2019-11-19 22:16:30,702 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2019-11-19 22:16:30,743 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-19 22:16:30,744 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-19 22:16:30,745 INFO L168 Benchmark]: Toolchain (without parser) took 6932.38 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 71.8 MB). Free memory was 961.7 MB in the beginning and 931.2 MB in the end (delta: 30.5 MB). Peak memory consumption was 102.3 MB. Max. memory is 11.5 GB. [2019-11-19 22:16:30,746 INFO L168 Benchmark]: CDTParser took 0.32 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 22:16:30,747 INFO L168 Benchmark]: CACSL2BoogieTranslator took 242.41 ms. Allocated memory is still 1.0 GB. Free memory was 961.7 MB in the beginning and 951.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-19 22:16:30,748 INFO L168 Benchmark]: Boogie Preprocessor took 93.96 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 71.8 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -109.6 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2019-11-19 22:16:30,748 INFO L168 Benchmark]: RCFGBuilder took 307.58 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: 21.4 MB). Peak memory consumption was 21.4 MB. Max. memory is 11.5 GB. [2019-11-19 22:16:30,749 INFO L168 Benchmark]: TraceAbstraction took 6209.23 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 938.2 MB in the end (delta: 101.0 MB). Peak memory consumption was 101.0 MB. Max. memory is 11.5 GB. [2019-11-19 22:16:30,750 INFO L168 Benchmark]: Witness Printer took 65.77 ms. Allocated memory is still 1.1 GB. Free memory was 938.2 MB in the beginning and 931.2 MB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 11.5 GB. [2019-11-19 22:16:30,753 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 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 242.41 ms. Allocated memory is still 1.0 GB. Free memory was 961.7 MB in the beginning and 951.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 93.96 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 71.8 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -109.6 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 307.58 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: 21.4 MB). Peak memory consumption was 21.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 6209.23 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 938.2 MB in the end (delta: 101.0 MB). Peak memory consumption was 101.0 MB. Max. memory is 11.5 GB. * Witness Printer took 65.77 ms. Allocated memory is still 1.1 GB. Free memory was 938.2 MB in the beginning and 931.2 MB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 19]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 17]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 17]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 19]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 15]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 19]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 15]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 17]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 17]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 12 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 33 locations, 12 error locations. Result: SAFE, OverallTime: 6.0s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 51 SDtfs, 67 SDslu, 37 SDs, 0 SdLazy, 66 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 78 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 4.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred 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, 0.1s SatisfiabilityAnalysisTime, 4.4s InterpolantComputationTime, 40 NumberOfCodeBlocks, 40 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 72 ConstructedInterpolants, 1 QuantifiedInterpolants, 3996 SizeOfPredicates, 8 NumberOfNonLiveVariables, 154 ConjunctsInSsa, 20 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...