./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 6b5699aa 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_10672c9b-de8c-42be-b73d-aca483a70df4/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_10672c9b-de8c-42be-b73d-aca483a70df4/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_10672c9b-de8c-42be-b73d-aca483a70df4/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_10672c9b-de8c-42be-b73d-aca483a70df4/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-crafted/NonTermination3-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_10672c9b-de8c-42be-b73d-aca483a70df4/bin/uautomizer/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_10672c9b-de8c-42be-b73d-aca483a70df4/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 0.1.24-6b5699a [2019-11-25 08:56:17,621 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-25 08:56:17,622 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-25 08:56:17,632 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-25 08:56:17,633 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-25 08:56:17,634 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-25 08:56:17,635 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-25 08:56:17,637 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-25 08:56:17,639 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-25 08:56:17,640 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-25 08:56:17,641 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-25 08:56:17,642 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-25 08:56:17,642 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-25 08:56:17,643 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-25 08:56:17,644 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-25 08:56:17,645 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-25 08:56:17,646 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-25 08:56:17,647 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-25 08:56:17,649 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-25 08:56:17,651 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-25 08:56:17,652 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-25 08:56:17,653 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-25 08:56:17,654 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-25 08:56:17,655 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-25 08:56:17,658 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-25 08:56:17,658 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-25 08:56:17,658 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-25 08:56:17,659 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-25 08:56:17,660 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-25 08:56:17,661 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-25 08:56:17,661 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-25 08:56:17,662 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-25 08:56:17,662 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-25 08:56:17,663 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-25 08:56:17,664 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-25 08:56:17,664 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-25 08:56:17,665 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-25 08:56:17,665 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-25 08:56:17,665 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-25 08:56:17,666 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-25 08:56:17,667 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-25 08:56:17,667 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_10672c9b-de8c-42be-b73d-aca483a70df4/bin/uautomizer/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Bitvector.epf [2019-11-25 08:56:17,679 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-25 08:56:17,680 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-25 08:56:17,681 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-25 08:56:17,681 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-25 08:56:17,681 INFO L138 SettingsManager]: * Use SBE=true [2019-11-25 08:56:17,681 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-25 08:56:17,681 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-25 08:56:17,682 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-25 08:56:17,682 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-25 08:56:17,682 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-25 08:56:17,682 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-25 08:56:17,683 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-25 08:56:17,683 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-25 08:56:17,683 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-25 08:56:17,683 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-25 08:56:17,683 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-25 08:56:17,684 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-25 08:56:17,684 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-25 08:56:17,684 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-25 08:56:17,684 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-25 08:56:17,684 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-25 08:56:17,685 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-25 08:56:17,685 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-25 08:56:17,685 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-25 08:56:17,685 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-25 08:56:17,685 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-25 08:56:17,686 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-25 08:56:17,686 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_10672c9b-de8c-42be-b73d-aca483a70df4/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 [2019-11-25 08:56:17,821 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-25 08:56:17,830 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-25 08:56:17,833 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-25 08:56:17,835 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-25 08:56:17,835 INFO L275 PluginConnector]: CDTParser initialized [2019-11-25 08:56:17,835 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_10672c9b-de8c-42be-b73d-aca483a70df4/bin/uautomizer/../../sv-benchmarks/c/termination-crafted/NonTermination3-1.c [2019-11-25 08:56:17,883 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_10672c9b-de8c-42be-b73d-aca483a70df4/bin/uautomizer/data/0a701812f/19e4c83b4ac6485aa6ae48b11f25d2c3/FLAG77c24125d [2019-11-25 08:56:18,266 INFO L306 CDTParser]: Found 1 translation units. [2019-11-25 08:56:18,267 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_10672c9b-de8c-42be-b73d-aca483a70df4/sv-benchmarks/c/termination-crafted/NonTermination3-1.c [2019-11-25 08:56:18,272 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_10672c9b-de8c-42be-b73d-aca483a70df4/bin/uautomizer/data/0a701812f/19e4c83b4ac6485aa6ae48b11f25d2c3/FLAG77c24125d [2019-11-25 08:56:18,283 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_10672c9b-de8c-42be-b73d-aca483a70df4/bin/uautomizer/data/0a701812f/19e4c83b4ac6485aa6ae48b11f25d2c3 [2019-11-25 08:56:18,286 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-25 08:56:18,287 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-25 08:56:18,288 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-25 08:56:18,288 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-25 08:56:18,292 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-25 08:56:18,293 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:56:18" (1/1) ... [2019-11-25 08:56:18,295 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43c40aec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:56:18, skipping insertion in model container [2019-11-25 08:56:18,301 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:56:18" (1/1) ... [2019-11-25 08:56:18,307 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-25 08:56:18,322 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-25 08:56:18,558 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:56:18,566 INFO L201 MainTranslator]: Completed pre-run [2019-11-25 08:56:18,591 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:56:18,613 INFO L205 MainTranslator]: Completed translation [2019-11-25 08:56:18,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:56:18 WrapperNode [2019-11-25 08:56:18,614 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-25 08:56:18,615 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-25 08:56:18,615 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-25 08:56:18,615 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-25 08:56:18,627 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:56:18" (1/1) ... [2019-11-25 08:56:18,628 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:56:18" (1/1) ... [2019-11-25 08:56:18,637 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:56:18" (1/1) ... [2019-11-25 08:56:18,637 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:56:18" (1/1) ... [2019-11-25 08:56:18,652 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:56:18" (1/1) ... [2019-11-25 08:56:18,656 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:56:18" (1/1) ... [2019-11-25 08:56:18,662 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:56:18" (1/1) ... [2019-11-25 08:56:18,668 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-25 08:56:18,669 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-25 08:56:18,669 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-25 08:56:18,669 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-25 08:56:18,670 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:56:18" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_10672c9b-de8c-42be-b73d-aca483a70df4/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 [2019-11-25 08:56:18,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-25 08:56:18,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-25 08:56:18,736 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-25 08:56:18,736 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-25 08:56:18,736 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-25 08:56:18,737 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-25 08:56:18,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-25 08:56:18,738 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-25 08:56:18,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-25 08:56:18,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-25 08:56:18,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-25 08:56:19,040 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-25 08:56:19,040 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-11-25 08:56:19,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:56:19 BoogieIcfgContainer [2019-11-25 08:56:19,041 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-25 08:56:19,042 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-25 08:56:19,042 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-25 08:56:19,056 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-25 08:56:19,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:56:18" (1/3) ... [2019-11-25 08:56:19,057 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4eec2f19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:56:19, skipping insertion in model container [2019-11-25 08:56:19,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:56:18" (2/3) ... [2019-11-25 08:56:19,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4eec2f19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:56:19, skipping insertion in model container [2019-11-25 08:56:19,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:56:19" (3/3) ... [2019-11-25 08:56:19,059 INFO L109 eAbstractionObserver]: Analyzing ICFG NonTermination3-1.c [2019-11-25 08:56:19,080 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-25 08:56:19,086 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2019-11-25 08:56:19,096 INFO L249 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2019-11-25 08:56:19,113 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-25 08:56:19,114 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-25 08:56:19,114 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-25 08:56:19,114 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-25 08:56:19,115 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-25 08:56:19,115 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-25 08:56:19,115 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-25 08:56:19,115 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-25 08:56:19,134 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-11-25 08:56:19,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-25 08:56:19,143 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:56:19,143 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:56:19,143 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2019-11-25 08:56:19,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:56:19,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1254763092, now seen corresponding path program 1 times [2019-11-25 08:56:19,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:56:19,155 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [343324474] [2019-11-25 08:56:19,155 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_10672c9b-de8c-42be-b73d-aca483a70df4/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 [2019-11-25 08:56:19,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:56:19,268 INFO L255 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-25 08:56:19,275 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:56:19,340 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 [2019-11-25 08:56:19,341 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:56:19,363 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:56:19,364 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:56:19,364 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-11-25 08:56:19,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:56:19,385 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:56:19,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:56:19,491 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [343324474] [2019-11-25 08:56:19,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:56:19,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-11-25 08:56:19,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060780777] [2019-11-25 08:56:19,495 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-25 08:56:19,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:56:19,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-25 08:56:19,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-25 08:56:19,507 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 4 states. [2019-11-25 08:56:19,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:56:19,775 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2019-11-25 08:56:19,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-25 08:56:19,777 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-11-25 08:56:19,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:56:19,785 INFO L225 Difference]: With dead ends: 47 [2019-11-25 08:56:19,785 INFO L226 Difference]: Without dead ends: 44 [2019-11-25 08:56:19,787 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-25 08:56:19,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-25 08:56:19,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2019-11-25 08:56:19,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-25 08:56:19,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2019-11-25 08:56:19,827 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 8 [2019-11-25 08:56:19,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:56:19,828 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2019-11-25 08:56:19,829 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-25 08:56:19,829 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2019-11-25 08:56:19,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-25 08:56:19,830 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:56:19,830 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:56:20,032 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:56:20,032 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2019-11-25 08:56:20,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:56:20,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1254763091, now seen corresponding path program 1 times [2019-11-25 08:56:20,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:56:20,033 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1374395931] [2019-11-25 08:56:20,033 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_10672c9b-de8c-42be-b73d-aca483a70df4/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 [2019-11-25 08:56:20,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:56:20,084 INFO L255 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-25 08:56:20,084 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:56:20,099 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 [2019-11-25 08:56:20,100 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:56:20,104 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:56:20,104 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:56:20,105 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-25 08:56:20,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:56:20,109 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:56:20,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:56:20,115 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1374395931] [2019-11-25 08:56:20,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:56:20,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-25 08:56:20,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079382971] [2019-11-25 08:56:20,116 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-25 08:56:20,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:56:20,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-25 08:56:20,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-25 08:56:20,117 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 3 states. [2019-11-25 08:56:20,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:56:20,166 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2019-11-25 08:56:20,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-25 08:56:20,167 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-25 08:56:20,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:56:20,168 INFO L225 Difference]: With dead ends: 28 [2019-11-25 08:56:20,168 INFO L226 Difference]: Without dead ends: 28 [2019-11-25 08:56:20,169 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 [2019-11-25 08:56:20,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-25 08:56:20,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-11-25 08:56:20,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-25 08:56:20,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2019-11-25 08:56:20,173 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 8 [2019-11-25 08:56:20,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:56:20,173 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2019-11-25 08:56:20,173 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-25 08:56:20,173 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2019-11-25 08:56:20,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-25 08:56:20,174 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:56:20,174 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:56:20,376 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:56:20,380 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2019-11-25 08:56:20,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:56:20,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1624582982, now seen corresponding path program 1 times [2019-11-25 08:56:20,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:56:20,381 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1184896755] [2019-11-25 08:56:20,381 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_10672c9b-de8c-42be-b73d-aca483a70df4/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 [2019-11-25 08:56:20,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:56:20,448 INFO L255 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-25 08:56:20,450 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:56:20,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:56:20,468 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:56:20,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:56:20,516 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1184896755] [2019-11-25 08:56:20,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:56:20,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2019-11-25 08:56:20,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492354976] [2019-11-25 08:56:20,517 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-25 08:56:20,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:56:20,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-25 08:56:20,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-25 08:56:20,518 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 6 states. [2019-11-25 08:56:20,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:56:20,627 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2019-11-25 08:56:20,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-25 08:56:20,628 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2019-11-25 08:56:20,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:56:20,629 INFO L225 Difference]: With dead ends: 36 [2019-11-25 08:56:20,629 INFO L226 Difference]: Without dead ends: 36 [2019-11-25 08:56:20,629 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 [2019-11-25 08:56:20,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-25 08:56:20,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2019-11-25 08:56:20,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-25 08:56:20,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2019-11-25 08:56:20,639 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 14 [2019-11-25 08:56:20,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:56:20,640 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2019-11-25 08:56:20,640 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-25 08:56:20,640 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2019-11-25 08:56:20,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-25 08:56:20,641 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:56:20,642 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:56:20,844 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:56:20,844 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2019-11-25 08:56:20,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:56:20,845 INFO L82 PathProgramCache]: Analyzing trace with hash -2098043558, now seen corresponding path program 1 times [2019-11-25 08:56:20,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:56:20,846 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [510131229] [2019-11-25 08:56:20,846 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_10672c9b-de8c-42be-b73d-aca483a70df4/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 [2019-11-25 08:56:20,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:56:20,923 INFO L255 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-25 08:56:20,925 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:56:20,932 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 [2019-11-25 08:56:20,933 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:56:20,944 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:56:20,944 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:56:20,944 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-11-25 08:56:21,013 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:56:21,013 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:56:21,497 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:56:21,498 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [510131229] [2019-11-25 08:56:21,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:56:21,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2019-11-25 08:56:21,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650283754] [2019-11-25 08:56:21,499 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-25 08:56:21,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:56:21,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-25 08:56:21,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-11-25 08:56:21,500 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 9 states. [2019-11-25 08:56:21,836 WARN L192 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 18 [2019-11-25 08:56:22,124 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 17 [2019-11-25 08:56:22,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:56:22,455 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2019-11-25 08:56:22,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-25 08:56:22,456 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2019-11-25 08:56:22,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:56:22,457 INFO L225 Difference]: With dead ends: 62 [2019-11-25 08:56:22,457 INFO L226 Difference]: Without dead ends: 62 [2019-11-25 08:56:22,458 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-11-25 08:56:22,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-25 08:56:22,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 44. [2019-11-25 08:56:22,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-25 08:56:22,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2019-11-25 08:56:22,463 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 16 [2019-11-25 08:56:22,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:56:22,464 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2019-11-25 08:56:22,464 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-25 08:56:22,464 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2019-11-25 08:56:22,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-25 08:56:22,465 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:56:22,465 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:56:22,666 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:56:22,671 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2019-11-25 08:56:22,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:56:22,672 INFO L82 PathProgramCache]: Analyzing trace with hash -391879985, now seen corresponding path program 2 times [2019-11-25 08:56:22,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:56:22,672 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1654866115] [2019-11-25 08:56:22,673 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_10672c9b-de8c-42be-b73d-aca483a70df4/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 [2019-11-25 08:56:22,724 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-25 08:56:22,724 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:56:22,725 INFO L255 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-25 08:56:22,726 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:56:22,735 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 [2019-11-25 08:56:22,735 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:56:22,741 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:56:22,742 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:56:22,742 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-25 08:56:22,820 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-25 08:56:22,821 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:56:22,955 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-25 08:56:22,956 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:56:22,966 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:56:22,971 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:56:22,975 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:56:24,619 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-25 08:56:24,619 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1654866115] [2019-11-25 08:56:24,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:56:24,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2019-11-25 08:56:24,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840086576] [2019-11-25 08:56:24,621 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-25 08:56:24,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:56:24,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-25 08:56:24,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-25 08:56:24,622 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 8 states. [2019-11-25 08:56:24,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:56:24,877 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2019-11-25 08:56:24,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-25 08:56:24,878 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2019-11-25 08:56:24,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:56:24,879 INFO L225 Difference]: With dead ends: 49 [2019-11-25 08:56:24,879 INFO L226 Difference]: Without dead ends: 49 [2019-11-25 08:56:24,879 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 [2019-11-25 08:56:24,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-25 08:56:24,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2019-11-25 08:56:24,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-25 08:56:24,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2019-11-25 08:56:24,884 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 26 [2019-11-25 08:56:24,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:56:24,885 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2019-11-25 08:56:24,885 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-25 08:56:24,885 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2019-11-25 08:56:24,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-25 08:56:24,886 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:56:24,886 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:56:25,096 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:56:25,096 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2019-11-25 08:56:25,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:56:25,097 INFO L82 PathProgramCache]: Analyzing trace with hash 736628442, now seen corresponding path program 1 times [2019-11-25 08:56:25,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:56:25,097 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1488300311] [2019-11-25 08:56:25,098 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_10672c9b-de8c-42be-b73d-aca483a70df4/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 [2019-11-25 08:56:25,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:56:25,151 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-25 08:56:25,152 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:56:25,159 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-25 08:56:25,159 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:56:25,165 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-25 08:56:25,165 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1488300311] [2019-11-25 08:56:25,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:56:25,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2019-11-25 08:56:25,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87482775] [2019-11-25 08:56:25,166 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-25 08:56:25,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:56:25,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-25 08:56:25,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-25 08:56:25,167 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 3 states. [2019-11-25 08:56:25,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:56:25,177 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2019-11-25 08:56:25,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-25 08:56:25,177 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2019-11-25 08:56:25,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:56:25,179 INFO L225 Difference]: With dead ends: 44 [2019-11-25 08:56:25,179 INFO L226 Difference]: Without dead ends: 44 [2019-11-25 08:56:25,179 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 [2019-11-25 08:56:25,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-25 08:56:25,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-11-25 08:56:25,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-25 08:56:25,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2019-11-25 08:56:25,184 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 27 [2019-11-25 08:56:25,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:56:25,184 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2019-11-25 08:56:25,184 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-25 08:56:25,184 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2019-11-25 08:56:25,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-25 08:56:25,185 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:56:25,185 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:56:25,390 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:56:25,390 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2019-11-25 08:56:25,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:56:25,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1360643474, now seen corresponding path program 1 times [2019-11-25 08:56:25,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:56:25,391 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [785400985] [2019-11-25 08:56:25,391 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_10672c9b-de8c-42be-b73d-aca483a70df4/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 [2019-11-25 08:56:25,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:56:25,483 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-25 08:56:25,484 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:56:25,526 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:56:25,526 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:56:25,650 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:56:25,651 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [785400985] [2019-11-25 08:56:25,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:56:25,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2019-11-25 08:56:25,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342044254] [2019-11-25 08:56:25,652 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-25 08:56:25,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:56:25,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-25 08:56:25,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-11-25 08:56:25,653 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 12 states. [2019-11-25 08:56:26,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:56:26,025 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2019-11-25 08:56:26,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-25 08:56:26,026 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2019-11-25 08:56:26,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:56:26,027 INFO L225 Difference]: With dead ends: 62 [2019-11-25 08:56:26,027 INFO L226 Difference]: Without dead ends: 62 [2019-11-25 08:56:26,027 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2019-11-25 08:56:26,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-25 08:56:26,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2019-11-25 08:56:26,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-25 08:56:26,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2019-11-25 08:56:26,033 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 28 [2019-11-25 08:56:26,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:56:26,033 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2019-11-25 08:56:26,033 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-25 08:56:26,033 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2019-11-25 08:56:26,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-25 08:56:26,034 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:56:26,034 INFO L410 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:56:26,235 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:56:26,235 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2019-11-25 08:56:26,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:56:26,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1150789990, now seen corresponding path program 2 times [2019-11-25 08:56:26,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:56:26,236 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1672378910] [2019-11-25 08:56:26,236 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_10672c9b-de8c-42be-b73d-aca483a70df4/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 [2019-11-25 08:56:26,373 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-25 08:56:26,374 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:56:26,375 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-25 08:56:26,376 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:56:26,384 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 [2019-11-25 08:56:26,385 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:56:26,412 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:56:26,413 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:56:26,413 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-11-25 08:56:26,531 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:56:26,531 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:56:27,647 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:56:27,648 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1672378910] [2019-11-25 08:56:27,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:56:27,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2019-11-25 08:56:27,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355844299] [2019-11-25 08:56:27,649 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-25 08:56:27,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:56:27,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-25 08:56:27,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-11-25 08:56:27,650 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand 16 states. [2019-11-25 08:56:28,144 WARN L192 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 18 [2019-11-25 08:56:28,457 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 17 [2019-11-25 08:56:28,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:56:28,686 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2019-11-25 08:56:28,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-25 08:56:28,687 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 32 [2019-11-25 08:56:28,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:56:28,687 INFO L225 Difference]: With dead ends: 60 [2019-11-25 08:56:28,688 INFO L226 Difference]: Without dead ends: 60 [2019-11-25 08:56:28,688 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2019-11-25 08:56:28,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-25 08:56:28,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-11-25 08:56:28,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-11-25 08:56:28,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2019-11-25 08:56:28,696 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 32 [2019-11-25 08:56:28,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:56:28,696 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2019-11-25 08:56:28,696 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-25 08:56:28,697 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2019-11-25 08:56:28,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-11-25 08:56:28,698 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:56:28,698 INFO L410 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:56:28,899 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:56:28,899 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2019-11-25 08:56:28,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:56:28,899 INFO L82 PathProgramCache]: Analyzing trace with hash 53171570, now seen corresponding path program 3 times [2019-11-25 08:56:28,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:56:28,900 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1970274481] [2019-11-25 08:56:28,900 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_10672c9b-de8c-42be-b73d-aca483a70df4/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 [2019-11-25 08:56:29,185 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2019-11-25 08:56:29,186 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:56:29,188 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-25 08:56:29,190 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:56:29,195 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 [2019-11-25 08:56:29,195 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:56:29,201 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:56:29,201 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:56:29,201 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-11-25 08:56:29,498 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 [2019-11-25 08:56:29,499 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:56:29,515 INFO L567 ElimStorePlain]: treesize reduction 27, result has 20.6 percent of original size [2019-11-25 08:56:29,516 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:56:29,516 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:7 [2019-11-25 08:56:29,595 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 10 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:56:29,595 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:56:32,156 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 10 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:56:32,156 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1970274481] [2019-11-25 08:56:32,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:56:32,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20] total 33 [2019-11-25 08:56:32,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941103947] [2019-11-25 08:56:32,157 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-25 08:56:32,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:56:32,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-25 08:56:32,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=851, Unknown=0, NotChecked=0, Total=1056 [2019-11-25 08:56:32,159 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 33 states. [2019-11-25 08:56:32,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:56:32,703 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2019-11-25 08:56:32,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-25 08:56:32,703 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 48 [2019-11-25 08:56:32,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:56:32,704 INFO L225 Difference]: With dead ends: 58 [2019-11-25 08:56:32,704 INFO L226 Difference]: Without dead ends: 58 [2019-11-25 08:56:32,705 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=205, Invalid=851, Unknown=0, NotChecked=0, Total=1056 [2019-11-25 08:56:32,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-25 08:56:32,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-11-25 08:56:32,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-25 08:56:32,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2019-11-25 08:56:32,710 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 48 [2019-11-25 08:56:32,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:56:32,710 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2019-11-25 08:56:32,710 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-25 08:56:32,711 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2019-11-25 08:56:32,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-25 08:56:32,712 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:56:32,712 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:56:32,915 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:56:32,916 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2019-11-25 08:56:32,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:56:32,916 INFO L82 PathProgramCache]: Analyzing trace with hash 653461412, now seen corresponding path program 2 times [2019-11-25 08:56:32,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:56:32,917 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [451648519] [2019-11-25 08:56:32,917 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_10672c9b-de8c-42be-b73d-aca483a70df4/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 [2019-11-25 08:56:32,973 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-25 08:56:32,973 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:56:32,974 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-25 08:56:32,977 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:56:32,987 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 [2019-11-25 08:56:32,988 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:56:32,991 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:56:32,991 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:56:32,991 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-25 08:56:33,055 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-11-25 08:56:33,055 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:56:35,116 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-11-25 08:56:35,116 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [451648519] [2019-11-25 08:56:35,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:56:35,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2019-11-25 08:56:35,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932625477] [2019-11-25 08:56:35,117 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-25 08:56:35,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:56:35,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-25 08:56:35,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=37, Unknown=1, NotChecked=0, Total=56 [2019-11-25 08:56:35,118 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 8 states. [2019-11-25 08:56:35,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:56:35,193 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2019-11-25 08:56:35,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-25 08:56:35,194 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2019-11-25 08:56:35,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:56:35,194 INFO L225 Difference]: With dead ends: 57 [2019-11-25 08:56:35,195 INFO L226 Difference]: Without dead ends: 54 [2019-11-25 08:56:35,195 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=23, Invalid=48, Unknown=1, NotChecked=0, Total=72 [2019-11-25 08:56:35,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-25 08:56:35,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-11-25 08:56:35,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-25 08:56:35,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2019-11-25 08:56:35,199 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2019-11-25 08:56:35,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:56:35,199 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2019-11-25 08:56:35,199 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-25 08:56:35,199 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2019-11-25 08:56:35,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-25 08:56:35,200 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:56:35,200 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:56:35,400 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:56:35,401 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2019-11-25 08:56:35,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:56:35,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1223356603, now seen corresponding path program 1 times [2019-11-25 08:56:35,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:56:35,401 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [275866801] [2019-11-25 08:56:35,402 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_10672c9b-de8c-42be-b73d-aca483a70df4/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 [2019-11-25 08:56:35,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:56:35,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:56:36,008 INFO L174 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2019-11-25 08:56:36,009 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-25 08:56:36,223 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:56:36,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 08:56:36 BoogieIcfgContainer [2019-11-25 08:56:36,255 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-25 08:56:36,255 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-25 08:56:36,255 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-25 08:56:36,255 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-25 08:56:36,256 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:56:19" (3/4) ... [2019-11-25 08:56:36,258 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-25 08:56:36,309 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_10672c9b-de8c-42be-b73d-aca483a70df4/bin/uautomizer/witness.graphml [2019-11-25 08:56:36,309 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-25 08:56:36,310 INFO L168 Benchmark]: Toolchain (without parser) took 18023.54 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 280.0 MB). Free memory was 946.1 MB in the beginning and 1.3 GB in the end (delta: -315.5 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:56:36,311 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:56:36,311 INFO L168 Benchmark]: CACSL2BoogieTranslator took 326.88 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.9 MB). Free memory was 946.1 MB in the beginning and 1.1 GB in the end (delta: -184.1 MB). Peak memory consumption was 22.7 MB. Max. memory is 11.5 GB. [2019-11-25 08:56:36,312 INFO L168 Benchmark]: Boogie Preprocessor took 53.73 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:56:36,312 INFO L168 Benchmark]: RCFGBuilder took 372.50 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 23.5 MB). Peak memory consumption was 23.5 MB. Max. memory is 11.5 GB. [2019-11-25 08:56:36,313 INFO L168 Benchmark]: TraceAbstraction took 17212.76 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 141.0 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -157.9 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:56:36,313 INFO L168 Benchmark]: Witness Printer took 53.94 ms. Allocated memory is still 1.3 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 11.5 GB. [2019-11-25 08:56:36,316 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 326.88 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.9 MB). Free memory was 946.1 MB in the beginning and 1.1 GB in the end (delta: -184.1 MB). Peak memory consumption was 22.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 53.73 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 372.50 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 23.5 MB). Peak memory consumption was 23.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 17212.76 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 141.0 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -157.9 MB). There was no memory consumed. Max. memory is 11.5 GB. * Witness Printer took 53.94 ms. Allocated memory is still 1.3 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 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: 17.1s, OverallIterations: 11, TraceHistogramMax: 11, AutomataDifference: 3.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 200 SDtfs, 334 SDslu, 735 SDs, 0 SdLazy, 1070 SolverSat, 94 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 521 GetRequests, 402 SyntacticMatches, 24 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 10.2s 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, 9.3s 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...