./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-crafted/NonTermination3-1.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/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_c29efdc0-50a5-40f3-a948-eef9397dde29/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_c29efdc0-50a5-40f3-a948-eef9397dde29/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_c29efdc0-50a5-40f3-a948-eef9397dde29/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_c29efdc0-50a5-40f3-a948-eef9397dde29/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-crafted/NonTermination3-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_c29efdc0-50a5-40f3-a948-eef9397dde29/bin/uautomizer/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_c29efdc0-50a5-40f3-a948-eef9397dde29/bin/uautomizer --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 76e89a58b9c6f7059fcf416ee7a1666558a3d440 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- Skipped default analysis because property is memsafety ### Bit-precise run ### This is Ultimate 0.1.24-678e011 [2019-11-20 00:47:47,714 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 00:47:47,716 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 00:47:47,726 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 00:47:47,726 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 00:47:47,727 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 00:47:47,728 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 00:47:47,730 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 00:47:47,732 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 00:47:47,733 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 00:47:47,734 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 00:47:47,735 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 00:47:47,735 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 00:47:47,736 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 00:47:47,737 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 00:47:47,738 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 00:47:47,739 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 00:47:47,740 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 00:47:47,742 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 00:47:47,744 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 00:47:47,746 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 00:47:47,747 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 00:47:47,748 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 00:47:47,749 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 00:47:47,751 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 00:47:47,751 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 00:47:47,752 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 00:47:47,753 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 00:47:47,753 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 00:47:47,754 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 00:47:47,754 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 00:47:47,755 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 00:47:47,755 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 00:47:47,756 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 00:47:47,757 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 00:47:47,757 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 00:47:47,758 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 00:47:47,758 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 00:47:47,758 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 00:47:47,762 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 00:47:47,762 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 00:47:47,763 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_c29efdc0-50a5-40f3-a948-eef9397dde29/bin/uautomizer/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Bitvector.epf [2019-11-20 00:47:47,777 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 00:47:47,778 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 00:47:47,779 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 00:47:47,779 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 00:47:47,779 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 00:47:47,779 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 00:47:47,779 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-20 00:47:47,780 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 00:47:47,780 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 00:47:47,780 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-20 00:47:47,780 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-20 00:47:47,780 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-20 00:47:47,780 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 00:47:47,781 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-20 00:47:47,781 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-20 00:47:47,781 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 00:47:47,784 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 00:47:47,784 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 00:47:47,784 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 00:47:47,784 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 00:47:47,785 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 00:47:47,785 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 00:47:47,785 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 00:47:47,785 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-20 00:47:47,786 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-20 00:47:47,786 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-20 00:47:47,786 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 -> /tmp/vcloud-vcloud-master/worker/run_dir_c29efdc0-50a5-40f3-a948-eef9397dde29/bin/uautomizer 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 -> 76e89a58b9c6f7059fcf416ee7a1666558a3d440 [2019-11-20 00:47:47,956 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 00:47:47,966 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 00:47:47,969 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 00:47:47,970 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 00:47:47,971 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 00:47:47,971 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_c29efdc0-50a5-40f3-a948-eef9397dde29/bin/uautomizer/../../sv-benchmarks/c/termination-crafted/NonTermination3-1.c [2019-11-20 00:47:48,023 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c29efdc0-50a5-40f3-a948-eef9397dde29/bin/uautomizer/data/179d2b647/cae4baa8f1024e3c8a991a83a10d0482/FLAG5c8bd2e6f [2019-11-20 00:47:48,426 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 00:47:48,427 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_c29efdc0-50a5-40f3-a948-eef9397dde29/sv-benchmarks/c/termination-crafted/NonTermination3-1.c [2019-11-20 00:47:48,433 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c29efdc0-50a5-40f3-a948-eef9397dde29/bin/uautomizer/data/179d2b647/cae4baa8f1024e3c8a991a83a10d0482/FLAG5c8bd2e6f [2019-11-20 00:47:48,448 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_c29efdc0-50a5-40f3-a948-eef9397dde29/bin/uautomizer/data/179d2b647/cae4baa8f1024e3c8a991a83a10d0482 [2019-11-20 00:47:48,451 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 00:47:48,452 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-20 00:47:48,456 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 00:47:48,456 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 00:47:48,459 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 00:47:48,460 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:47:48" (1/1) ... [2019-11-20 00:47:48,463 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21f2b762 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:47:48, skipping insertion in model container [2019-11-20 00:47:48,463 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:47:48" (1/1) ... [2019-11-20 00:47:48,470 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 00:47:48,487 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 00:47:48,634 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 00:47:48,639 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 00:47:48,716 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 00:47:48,737 INFO L192 MainTranslator]: Completed translation [2019-11-20 00:47:48,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:47:48 WrapperNode [2019-11-20 00:47:48,737 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 00:47:48,738 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 00:47:48,738 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 00:47:48,738 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 00:47:48,750 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:47:48" (1/1) ... [2019-11-20 00:47:48,751 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:47:48" (1/1) ... [2019-11-20 00:47:48,759 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:47:48" (1/1) ... [2019-11-20 00:47:48,759 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:47:48" (1/1) ... [2019-11-20 00:47:48,767 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:47:48" (1/1) ... [2019-11-20 00:47:48,772 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:47:48" (1/1) ... [2019-11-20 00:47:48,774 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:47:48" (1/1) ... [2019-11-20 00:47:48,776 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 00:47:48,776 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 00:47:48,776 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 00:47:48,777 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 00:47:48,778 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:47:48" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c29efdc0-50a5-40f3-a948-eef9397dde29/bin/uautomizer/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 [2019-11-20 00:47:48,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-20 00:47:48,835 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 00:47:48,835 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-20 00:47:48,835 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-20 00:47:48,835 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-20 00:47:48,835 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-20 00:47:48,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-20 00:47:48,836 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-20 00:47:48,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-20 00:47:48,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-20 00:47:48,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 00:47:49,201 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 00:47:49,201 INFO L285 CfgBuilder]: Removed 2 assume(true) statements. [2019-11-20 00:47:49,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:47:49 BoogieIcfgContainer [2019-11-20 00:47:49,203 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 00:47:49,204 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 00:47:49,204 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 00:47:49,208 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 00:47:49,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 12:47:48" (1/3) ... [2019-11-20 00:47:49,211 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b6d50fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:47:49, skipping insertion in model container [2019-11-20 00:47:49,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:47:48" (2/3) ... [2019-11-20 00:47:49,212 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b6d50fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:47:49, skipping insertion in model container [2019-11-20 00:47:49,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:47:49" (3/3) ... [2019-11-20 00:47:49,216 INFO L109 eAbstractionObserver]: Analyzing ICFG NonTermination3-1.c [2019-11-20 00:47:49,225 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 00:47:49,231 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2019-11-20 00:47:49,241 INFO L249 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2019-11-20 00:47:49,261 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 00:47:49,261 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-20 00:47:49,261 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 00:47:49,261 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 00:47:49,262 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 00:47:49,262 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 00:47:49,262 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 00:47:49,262 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 00:47:49,278 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-11-20 00:47:49,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-20 00:47:49,290 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:47:49,291 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:47:49,291 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 00:47:49,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:47:49,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1254763092, now seen corresponding path program 1 times [2019-11-20 00:47:49,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 00:47:49,307 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1391438155] [2019-11-20 00:47:49,307 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c29efdc0-50a5-40f3-a948-eef9397dde29/bin/uautomizer/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 [2019-11-20 00:47:49,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:47:49,403 INFO L255 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-20 00:47:49,407 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:47:49,457 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 [2019-11-20 00:47:49,457 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:47:49,480 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:47:49,480 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 00:47:49,481 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-11-20 00:47:49,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 00:47:49,501 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 00:47:49,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 00:47:49,600 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1391438155] [2019-11-20 00:47:49,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 00:47:49,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-11-20 00:47:49,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283187838] [2019-11-20 00:47:49,609 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 00:47:49,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 00:47:49,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 00:47:49,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-20 00:47:49,624 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 4 states. [2019-11-20 00:47:49,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:47:49,863 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2019-11-20 00:47:49,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-20 00:47:49,864 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-11-20 00:47:49,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:47:49,871 INFO L225 Difference]: With dead ends: 47 [2019-11-20 00:47:49,871 INFO L226 Difference]: Without dead ends: 44 [2019-11-20 00:47:49,873 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 [2019-11-20 00:47:49,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-20 00:47:49,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2019-11-20 00:47:49,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-20 00:47:49,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2019-11-20 00:47:49,906 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 8 [2019-11-20 00:47:49,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:47:49,906 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2019-11-20 00:47:49,906 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 00:47:49,906 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2019-11-20 00:47:49,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-20 00:47:49,907 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:47:49,907 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:47:50,107 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 00:47:50,108 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 00:47:50,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:47:50,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1254763091, now seen corresponding path program 1 times [2019-11-20 00:47:50,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 00:47:50,109 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [376745104] [2019-11-20 00:47:50,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c29efdc0-50a5-40f3-a948-eef9397dde29/bin/uautomizer/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 [2019-11-20 00:47:50,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:47:50,167 INFO L255 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-20 00:47:50,168 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:47:50,179 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 [2019-11-20 00:47:50,179 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:47:50,182 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:47:50,182 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 00:47:50,183 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 00:47:50,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 00:47:50,188 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 00:47:50,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 00:47:50,194 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [376745104] [2019-11-20 00:47:50,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 00:47:50,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-20 00:47:50,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892969368] [2019-11-20 00:47:50,196 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 00:47:50,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 00:47:50,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 00:47:50,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 00:47:50,197 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 3 states. [2019-11-20 00:47:50,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:47:50,269 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2019-11-20 00:47:50,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 00:47:50,272 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-20 00:47:50,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:47:50,286 INFO L225 Difference]: With dead ends: 28 [2019-11-20 00:47:50,286 INFO L226 Difference]: Without dead ends: 28 [2019-11-20 00:47:50,287 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 [2019-11-20 00:47:50,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-20 00:47:50,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-11-20 00:47:50,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-20 00:47:50,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2019-11-20 00:47:50,291 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 8 [2019-11-20 00:47:50,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:47:50,291 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2019-11-20 00:47:50,292 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 00:47:50,292 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2019-11-20 00:47:50,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-20 00:47:50,292 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:47:50,293 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:47:50,493 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 00:47:50,493 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 00:47:50,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:47:50,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1624582982, now seen corresponding path program 1 times [2019-11-20 00:47:50,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 00:47:50,495 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1561112312] [2019-11-20 00:47:50,495 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c29efdc0-50a5-40f3-a948-eef9397dde29/bin/uautomizer/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 [2019-11-20 00:47:50,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:47:50,561 INFO L255 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-20 00:47:50,562 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:47:50,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 00:47:50,580 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 00:47:50,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 00:47:50,634 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1561112312] [2019-11-20 00:47:50,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:47:50,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2019-11-20 00:47:50,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452067966] [2019-11-20 00:47:50,635 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 00:47:50,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 00:47:50,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 00:47:50,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-20 00:47:50,636 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 6 states. [2019-11-20 00:47:50,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:47:50,758 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2019-11-20 00:47:50,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 00:47:50,759 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2019-11-20 00:47:50,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:47:50,760 INFO L225 Difference]: With dead ends: 36 [2019-11-20 00:47:50,760 INFO L226 Difference]: Without dead ends: 36 [2019-11-20 00:47:50,761 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-11-20 00:47:50,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-20 00:47:50,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2019-11-20 00:47:50,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-20 00:47:50,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2019-11-20 00:47:50,766 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 14 [2019-11-20 00:47:50,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:47:50,766 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2019-11-20 00:47:50,767 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 00:47:50,767 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2019-11-20 00:47:50,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-20 00:47:50,767 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:47:50,768 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:47:50,976 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 00:47:50,976 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 00:47:50,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:47:50,976 INFO L82 PathProgramCache]: Analyzing trace with hash -2098043558, now seen corresponding path program 1 times [2019-11-20 00:47:50,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 00:47:50,977 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1118492601] [2019-11-20 00:47:50,977 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c29efdc0-50a5-40f3-a948-eef9397dde29/bin/uautomizer/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 [2019-11-20 00:47:51,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:47:51,073 INFO L255 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 00:47:51,074 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:47:51,088 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 [2019-11-20 00:47:51,088 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:47:51,099 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:47:51,100 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 00:47:51,100 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-11-20 00:47:51,176 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 00:47:51,176 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 00:47:51,640 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 00:47:51,640 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1118492601] [2019-11-20 00:47:51,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:47:51,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2019-11-20 00:47:51,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471026758] [2019-11-20 00:47:51,642 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-20 00:47:51,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 00:47:51,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-20 00:47:51,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-11-20 00:47:51,642 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 9 states. [2019-11-20 00:47:51,882 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 18 [2019-11-20 00:47:52,167 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 17 [2019-11-20 00:47:52,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:47:52,615 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2019-11-20 00:47:52,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-20 00:47:52,616 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2019-11-20 00:47:52,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:47:52,617 INFO L225 Difference]: With dead ends: 62 [2019-11-20 00:47:52,618 INFO L226 Difference]: Without dead ends: 62 [2019-11-20 00:47:52,618 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-11-20 00:47:52,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-20 00:47:52,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 44. [2019-11-20 00:47:52,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-20 00:47:52,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2019-11-20 00:47:52,624 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 16 [2019-11-20 00:47:52,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:47:52,624 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2019-11-20 00:47:52,624 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-20 00:47:52,624 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2019-11-20 00:47:52,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-20 00:47:52,625 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:47:52,625 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:47:52,828 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 00:47:52,828 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 00:47:52,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:47:52,828 INFO L82 PathProgramCache]: Analyzing trace with hash -391879985, now seen corresponding path program 2 times [2019-11-20 00:47:52,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 00:47:52,829 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [569271909] [2019-11-20 00:47:52,830 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c29efdc0-50a5-40f3-a948-eef9397dde29/bin/uautomizer/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 00:47:52,878 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-20 00:47:52,879 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 00:47:52,880 INFO L255 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-20 00:47:52,882 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:47:52,894 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 [2019-11-20 00:47:52,894 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:47:52,905 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:47:52,905 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 00:47:52,906 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-20 00:47:52,990 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-20 00:47:52,990 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 00:47:53,128 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 00:47:53,129 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 00:47:53,141 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 00:47:53,143 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 00:47:53,145 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 00:47:54,840 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-20 00:47:54,840 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [569271909] [2019-11-20 00:47:54,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 00:47:54,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2019-11-20 00:47:54,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687387222] [2019-11-20 00:47:54,841 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-20 00:47:54,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 00:47:54,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-20 00:47:54,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-20 00:47:54,842 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 8 states. [2019-11-20 00:47:55,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:47:55,102 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2019-11-20 00:47:55,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-20 00:47:55,103 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2019-11-20 00:47:55,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:47:55,104 INFO L225 Difference]: With dead ends: 49 [2019-11-20 00:47:55,104 INFO L226 Difference]: Without dead ends: 49 [2019-11-20 00:47:55,105 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 17 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-11-20 00:47:55,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-20 00:47:55,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2019-11-20 00:47:55,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-20 00:47:55,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2019-11-20 00:47:55,110 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 26 [2019-11-20 00:47:55,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:47:55,110 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2019-11-20 00:47:55,110 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-20 00:47:55,110 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2019-11-20 00:47:55,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-20 00:47:55,111 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:47:55,111 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:47:55,313 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 00:47:55,313 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 00:47:55,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:47:55,314 INFO L82 PathProgramCache]: Analyzing trace with hash 736628442, now seen corresponding path program 1 times [2019-11-20 00:47:55,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 00:47:55,314 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1728734327] [2019-11-20 00:47:55,314 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c29efdc0-50a5-40f3-a948-eef9397dde29/bin/uautomizer/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 00:47:55,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:47:55,363 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-20 00:47:55,365 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:47:55,375 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-20 00:47:55,375 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 00:47:55,385 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-20 00:47:55,385 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1728734327] [2019-11-20 00:47:55,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 00:47:55,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2019-11-20 00:47:55,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687102552] [2019-11-20 00:47:55,386 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 00:47:55,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 00:47:55,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 00:47:55,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 00:47:55,387 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 3 states. [2019-11-20 00:47:55,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:47:55,401 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2019-11-20 00:47:55,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 00:47:55,402 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2019-11-20 00:47:55,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:47:55,404 INFO L225 Difference]: With dead ends: 44 [2019-11-20 00:47:55,404 INFO L226 Difference]: Without dead ends: 44 [2019-11-20 00:47:55,405 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 00:47:55,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-20 00:47:55,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-11-20 00:47:55,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-20 00:47:55,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2019-11-20 00:47:55,413 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 27 [2019-11-20 00:47:55,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:47:55,414 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2019-11-20 00:47:55,414 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 00:47:55,414 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2019-11-20 00:47:55,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-20 00:47:55,415 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:47:55,416 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:47:55,616 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 00:47:55,616 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 00:47:55,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:47:55,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1360643474, now seen corresponding path program 1 times [2019-11-20 00:47:55,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 00:47:55,617 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1668127673] [2019-11-20 00:47:55,618 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c29efdc0-50a5-40f3-a948-eef9397dde29/bin/uautomizer/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 00:47:55,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:47:55,712 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 00:47:55,714 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:47:55,745 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 00:47:55,745 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 00:47:55,849 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 00:47:55,850 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1668127673] [2019-11-20 00:47:55,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:47:55,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2019-11-20 00:47:55,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033358058] [2019-11-20 00:47:55,851 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-20 00:47:55,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 00:47:55,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-20 00:47:55,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-11-20 00:47:55,851 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 12 states. [2019-11-20 00:47:56,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:47:56,214 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2019-11-20 00:47:56,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-20 00:47:56,215 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2019-11-20 00:47:56,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:47:56,216 INFO L225 Difference]: With dead ends: 62 [2019-11-20 00:47:56,216 INFO L226 Difference]: Without dead ends: 62 [2019-11-20 00:47:56,216 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2019-11-20 00:47:56,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-20 00:47:56,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2019-11-20 00:47:56,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-20 00:47:56,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2019-11-20 00:47:56,221 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 28 [2019-11-20 00:47:56,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:47:56,221 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2019-11-20 00:47:56,222 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-20 00:47:56,222 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2019-11-20 00:47:56,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-20 00:47:56,222 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:47:56,222 INFO L410 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:47:56,423 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 00:47:56,423 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 00:47:56,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:47:56,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1150789990, now seen corresponding path program 2 times [2019-11-20 00:47:56,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 00:47:56,424 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1019752487] [2019-11-20 00:47:56,424 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c29efdc0-50a5-40f3-a948-eef9397dde29/bin/uautomizer/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 00:47:56,548 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 00:47:56,548 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 00:47:56,550 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 00:47:56,551 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:47:56,556 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 [2019-11-20 00:47:56,557 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:47:56,563 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:47:56,563 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 00:47:56,563 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-11-20 00:47:56,679 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 00:47:56,680 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 00:47:57,913 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 00:47:57,913 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1019752487] [2019-11-20 00:47:57,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:47:57,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2019-11-20 00:47:57,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066666985] [2019-11-20 00:47:57,914 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-20 00:47:57,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 00:47:57,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-20 00:47:57,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-11-20 00:47:57,915 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand 16 states. [2019-11-20 00:47:58,396 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 18 [2019-11-20 00:47:58,697 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 17 [2019-11-20 00:47:58,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:47:58,949 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2019-11-20 00:47:58,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-20 00:47:58,950 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 32 [2019-11-20 00:47:58,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:47:58,951 INFO L225 Difference]: With dead ends: 60 [2019-11-20 00:47:58,951 INFO L226 Difference]: Without dead ends: 60 [2019-11-20 00:47:58,952 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2019-11-20 00:47:58,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-20 00:47:58,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-11-20 00:47:58,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-11-20 00:47:58,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2019-11-20 00:47:58,958 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 32 [2019-11-20 00:47:58,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:47:58,958 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2019-11-20 00:47:58,959 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-20 00:47:58,959 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2019-11-20 00:47:58,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-11-20 00:47:58,960 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:47:58,960 INFO L410 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:47:59,162 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 00:47:59,163 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 00:47:59,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:47:59,163 INFO L82 PathProgramCache]: Analyzing trace with hash 53171570, now seen corresponding path program 3 times [2019-11-20 00:47:59,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 00:47:59,164 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [625514130] [2019-11-20 00:47:59,164 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c29efdc0-50a5-40f3-a948-eef9397dde29/bin/uautomizer/cvc4 Starting monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 00:47:59,450 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2019-11-20 00:47:59,450 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 00:47:59,452 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-20 00:47:59,455 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:47:59,459 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 [2019-11-20 00:47:59,460 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:47:59,465 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:47:59,466 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 00:47:59,466 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-11-20 00:47:59,765 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 18 treesize of output 14 [2019-11-20 00:47:59,766 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:47:59,781 INFO L567 ElimStorePlain]: treesize reduction 27, result has 20.6 percent of original size [2019-11-20 00:47:59,781 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 00:47:59,782 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:7 [2019-11-20 00:47:59,863 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 10 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 00:47:59,863 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 00:48:02,606 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 10 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 00:48:02,607 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [625514130] [2019-11-20 00:48:02,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:48:02,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20] total 33 [2019-11-20 00:48:02,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822893668] [2019-11-20 00:48:02,608 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-20 00:48:02,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 00:48:02,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-20 00:48:02,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=851, Unknown=0, NotChecked=0, Total=1056 [2019-11-20 00:48:02,609 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 33 states. [2019-11-20 00:48:03,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:48:03,225 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2019-11-20 00:48:03,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-20 00:48:03,226 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 48 [2019-11-20 00:48:03,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:48:03,226 INFO L225 Difference]: With dead ends: 58 [2019-11-20 00:48:03,226 INFO L226 Difference]: Without dead ends: 58 [2019-11-20 00:48:03,227 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=205, Invalid=851, Unknown=0, NotChecked=0, Total=1056 [2019-11-20 00:48:03,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-20 00:48:03,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-11-20 00:48:03,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-20 00:48:03,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2019-11-20 00:48:03,232 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 48 [2019-11-20 00:48:03,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:48:03,232 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2019-11-20 00:48:03,232 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-20 00:48:03,233 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2019-11-20 00:48:03,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-20 00:48:03,234 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:48:03,234 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:48:03,443 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 00:48:03,443 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 00:48:03,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:48:03,444 INFO L82 PathProgramCache]: Analyzing trace with hash 653461412, now seen corresponding path program 2 times [2019-11-20 00:48:03,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 00:48:03,444 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [366418905] [2019-11-20 00:48:03,444 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c29efdc0-50a5-40f3-a948-eef9397dde29/bin/uautomizer/cvc4 Starting monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 00:48:03,504 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-20 00:48:03,504 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 00:48:03,505 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 00:48:03,507 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:48:03,518 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 [2019-11-20 00:48:03,518 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:48:03,521 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:48:03,522 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 00:48:03,522 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 00:48:03,578 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-11-20 00:48:03,578 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 00:48:07,658 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-11-20 00:48:07,658 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [366418905] [2019-11-20 00:48:07,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 00:48:07,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2019-11-20 00:48:07,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777401404] [2019-11-20 00:48:07,659 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-20 00:48:07,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 00:48:07,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-20 00:48:07,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=36, Unknown=2, NotChecked=0, Total=56 [2019-11-20 00:48:07,660 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 8 states. [2019-11-20 00:48:07,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:48:07,753 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2019-11-20 00:48:07,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 00:48:07,754 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2019-11-20 00:48:07,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:48:07,755 INFO L225 Difference]: With dead ends: 57 [2019-11-20 00:48:07,755 INFO L226 Difference]: Without dead ends: 54 [2019-11-20 00:48:07,755 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=23, Invalid=47, Unknown=2, NotChecked=0, Total=72 [2019-11-20 00:48:07,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-20 00:48:07,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-11-20 00:48:07,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-20 00:48:07,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2019-11-20 00:48:07,759 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2019-11-20 00:48:07,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:48:07,759 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2019-11-20 00:48:07,759 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-20 00:48:07,759 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2019-11-20 00:48:07,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-20 00:48:07,762 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:48:07,762 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:48:07,963 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 00:48:07,964 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 00:48:07,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:48:07,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1223356603, now seen corresponding path program 1 times [2019-11-20 00:48:07,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 00:48:07,965 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1924668022] [2019-11-20 00:48:07,965 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c29efdc0-50a5-40f3-a948-eef9397dde29/bin/uautomizer/cvc4 Starting monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 00:48:08,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 00:48:08,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 00:48:08,596 INFO L174 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2019-11-20 00:48:08,596 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-20 00:48:08,809 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 00:48:08,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 12:48:08 BoogieIcfgContainer [2019-11-20 00:48:08,849 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-20 00:48:08,850 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 00:48:08,850 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 00:48:08,850 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 00:48:08,850 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:47:49" (3/4) ... [2019-11-20 00:48:08,852 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-20 00:48:08,913 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_c29efdc0-50a5-40f3-a948-eef9397dde29/bin/uautomizer/witness.graphml [2019-11-20 00:48:08,913 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 00:48:08,914 INFO L168 Benchmark]: Toolchain (without parser) took 20462.18 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 185.1 MB). Free memory was 944.7 MB in the beginning and 968.6 MB in the end (delta: -23.9 MB). Peak memory consumption was 161.1 MB. Max. memory is 11.5 GB. [2019-11-20 00:48:08,915 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 00:48:08,915 INFO L168 Benchmark]: CACSL2BoogieTranslator took 281.63 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 158.3 MB). Free memory was 944.7 MB in the beginning and 1.2 GB in the end (delta: -208.4 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. [2019-11-20 00:48:08,916 INFO L168 Benchmark]: Boogie Preprocessor took 37.99 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 00:48:08,916 INFO L168 Benchmark]: RCFGBuilder took 426.51 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 11.5 GB. [2019-11-20 00:48:08,917 INFO L168 Benchmark]: TraceAbstraction took 19645.89 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 26.7 MB). Free memory was 1.1 GB in the beginning and 976.3 MB in the end (delta: 153.1 MB). Peak memory consumption was 179.9 MB. Max. memory is 11.5 GB. [2019-11-20 00:48:08,917 INFO L168 Benchmark]: Witness Printer took 63.42 ms. Allocated memory is still 1.2 GB. Free memory was 976.3 MB in the beginning and 968.6 MB in the end (delta: 7.6 MB). Peak memory consumption was 7.6 MB. Max. memory is 11.5 GB. [2019-11-20 00:48:08,919 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 281.63 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 158.3 MB). Free memory was 944.7 MB in the beginning and 1.2 GB in the end (delta: -208.4 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 37.99 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 426.51 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 19645.89 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 26.7 MB). Free memory was 1.1 GB in the beginning and 976.3 MB in the end (delta: 153.1 MB). Peak memory consumption was 179.9 MB. Max. memory is 11.5 GB. * Witness Printer took 63.42 ms. Allocated memory is still 1.2 GB. Free memory was 976.3 MB in the beginning and 968.6 MB in the end (delta: 7.6 MB). Peak memory consumption was 7.6 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 20]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L10] int i = __VERIFIER_nondet_int(); [L11] int a[10]; [L13] int n = 0; VAL [a={3:0}, i=8, n=0] [L13] COND TRUE n < 10 VAL [a={3:0}, i=8, n=0] [L14] a[n] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, a={3:0}, i=8, n=0] [L13] ++n VAL [a={3:0}, i=8, n=1] [L13] COND TRUE n < 10 VAL [a={3:0}, i=8, n=1] [L14] a[n] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, a={3:0}, i=8, n=1] [L13] ++n VAL [a={3:0}, i=8, n=2] [L13] COND TRUE n < 10 VAL [a={3:0}, i=8, n=2] [L14] a[n] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, a={3:0}, i=8, n=2] [L13] ++n VAL [a={3:0}, i=8, n=3] [L13] COND TRUE n < 10 VAL [a={3:0}, i=8, n=3] [L14] a[n] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, a={3:0}, i=8, n=3] [L13] ++n VAL [a={3:0}, i=8, n=4] [L13] COND TRUE n < 10 VAL [a={3:0}, i=8, n=4] [L14] a[n] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, a={3:0}, i=8, n=4] [L13] ++n VAL [a={3:0}, i=8, n=5] [L13] COND TRUE n < 10 VAL [a={3:0}, i=8, n=5] [L14] a[n] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, a={3:0}, i=8, n=5] [L13] ++n VAL [a={3:0}, i=8, n=6] [L13] COND TRUE n < 10 VAL [a={3:0}, i=8, n=6] [L14] a[n] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, a={3:0}, i=8, n=6] [L13] ++n VAL [a={3:0}, i=8, n=7] [L13] COND TRUE n < 10 VAL [a={3:0}, i=8, n=7] [L14] a[n] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, a={3:0}, i=8, n=7] [L13] ++n VAL [a={3:0}, i=8, n=8] [L13] COND TRUE n < 10 VAL [a={3:0}, i=8, n=8] [L14] a[n] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, a={3:0}, i=8, n=8] [L13] ++n VAL [a={3:0}, i=8, n=9] [L13] COND TRUE n < 10 VAL [a={3:0}, i=8, n=9] [L14] a[n] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, a={3:0}, i=8, n=9] [L13] ++n VAL [a={3:0}, i=8, n=10] [L13] COND FALSE !(n < 10) VAL [a={3:0}, i=8, n=10] [L17] 0 <= i && i < 10 && a[i] >= 0 VAL [0 <= i && i < 10 && a[i] >= 0=1, a={3:0}, i=8, n=10] [L17] EXPR a[i] VAL [0 <= i && i < 10 && a[i] >= 0=1, a={3:0}, a[i]=0, i=8, n=10] [L17] 0 <= i && i < 10 && a[i] >= 0 VAL [0 <= i && i < 10 && a[i] >= 0=1, a={3:0}, a[i]=0, i=8, n=10] [L17] COND TRUE 0 <= i && i < 10 && a[i] >= 0 [L18] i = __VERIFIER_nondet_int() [L20] a[i] = 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 28 locations, 7 error locations. Result: UNSAFE, OverallTime: 19.5s, OverallIterations: 11, TraceHistogramMax: 11, AutomataDifference: 3.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 200 SDtfs, 334 SDslu, 735 SDs, 0 SdLazy, 1070 SolverSat, 94 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 521 GetRequests, 402 SyntacticMatches, 24 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 12.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=8, 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, 10 MinimizatonAttempts, 41 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 11.6s InterpolantComputationTime, 312 NumberOfCodeBlocks, 256 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 498 ConstructedInterpolants, 19 QuantifiedInterpolants, 230361 SizeOfPredicates, 13 NumberOfNonLiveVariables, 554 ConjunctsInSsa, 71 ConjunctsInUnsatCore, 20 InterpolantComputations, 10 PerfectInterpolantSequences, 512/1110 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 incorrect! Received shutdown request...