./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/forester-heap/dll-01-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 678e0110 Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_c02b6c03-0488-486f-8d7e-c7e4405a9092/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_c02b6c03-0488-486f-8d7e-c7e4405a9092/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_c02b6c03-0488-486f-8d7e-c7e4405a9092/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_c02b6c03-0488-486f-8d7e-c7e4405a9092/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/forester-heap/dll-01-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_c02b6c03-0488-486f-8d7e-c7e4405a9092/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_c02b6c03-0488-486f-8d7e-c7e4405a9092/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 32bit --witnessprinter.graph.data.programhash 877ba8a79b8b7ad33de53a48617e3dd4b0411834 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: AssertionError: no XNF --- Real Ultimate output --- Skipped default analysis because property is memsafety ### Bit-precise run ### This is Ultimate 0.1.24-678e011 [2019-11-20 10:36:43,573 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 10:36:43,575 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 10:36:43,588 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 10:36:43,589 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 10:36:43,590 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 10:36:43,591 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 10:36:43,594 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 10:36:43,596 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 10:36:43,597 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 10:36:43,602 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 10:36:43,603 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 10:36:43,604 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 10:36:43,605 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 10:36:43,607 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 10:36:43,608 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 10:36:43,609 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 10:36:43,610 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 10:36:43,613 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 10:36:43,615 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 10:36:43,617 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 10:36:43,619 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 10:36:43,621 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 10:36:43,625 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 10:36:43,628 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 10:36:43,631 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 10:36:43,632 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 10:36:43,633 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 10:36:43,633 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 10:36:43,634 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 10:36:43,634 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 10:36:43,635 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 10:36:43,636 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 10:36:43,637 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 10:36:43,638 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 10:36:43,638 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 10:36:43,639 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 10:36:43,639 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 10:36:43,639 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 10:36:43,640 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 10:36:43,642 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 10:36:43,642 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_c02b6c03-0488-486f-8d7e-c7e4405a9092/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2019-11-20 10:36:43,664 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 10:36:43,665 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 10:36:43,666 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 10:36:43,666 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 10:36:43,667 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 10:36:43,667 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 10:36:43,667 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 10:36:43,667 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-20 10:36:43,668 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 10:36:43,668 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 10:36:43,669 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 10:36:43,669 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-20 10:36:43,670 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-20 10:36:43,670 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-20 10:36:43,670 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 10:36:43,670 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-20 10:36:43,671 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-20 10:36:43,671 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 10:36:43,671 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 10:36:43,671 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 10:36:43,672 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 10:36:43,672 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 10:36:43,672 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 10:36:43,672 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 10:36:43,672 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 10:36:43,673 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 10:36:43,673 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-20 10:36:43,673 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-20 10:36:43,673 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-20 10:36:43,674 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_c02b6c03-0488-486f-8d7e-c7e4405a9092/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 -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 877ba8a79b8b7ad33de53a48617e3dd4b0411834 [2019-11-20 10:36:43,844 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 10:36:43,856 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 10:36:43,860 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 10:36:43,862 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 10:36:43,862 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 10:36:43,863 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_c02b6c03-0488-486f-8d7e-c7e4405a9092/bin/uautomizer/../../sv-benchmarks/c/forester-heap/dll-01-2.i [2019-11-20 10:36:43,924 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c02b6c03-0488-486f-8d7e-c7e4405a9092/bin/uautomizer/data/40cfae993/4216ef5ba1a743bfb2d7154d0ea07b70/FLAG5dd59b870 [2019-11-20 10:36:44,414 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 10:36:44,415 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_c02b6c03-0488-486f-8d7e-c7e4405a9092/sv-benchmarks/c/forester-heap/dll-01-2.i [2019-11-20 10:36:44,432 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c02b6c03-0488-486f-8d7e-c7e4405a9092/bin/uautomizer/data/40cfae993/4216ef5ba1a743bfb2d7154d0ea07b70/FLAG5dd59b870 [2019-11-20 10:36:44,725 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_c02b6c03-0488-486f-8d7e-c7e4405a9092/bin/uautomizer/data/40cfae993/4216ef5ba1a743bfb2d7154d0ea07b70 [2019-11-20 10:36:44,728 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 10:36:44,729 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-20 10:36:44,730 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 10:36:44,730 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 10:36:44,734 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 10:36:44,735 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:36:44" (1/1) ... [2019-11-20 10:36:44,738 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42a235bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:36:44, skipping insertion in model container [2019-11-20 10:36:44,738 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:36:44" (1/1) ... [2019-11-20 10:36:44,747 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 10:36:44,821 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 10:36:45,237 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 10:36:45,251 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 10:36:45,325 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 10:36:45,380 INFO L192 MainTranslator]: Completed translation [2019-11-20 10:36:45,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:36:45 WrapperNode [2019-11-20 10:36:45,381 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 10:36:45,382 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 10:36:45,382 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 10:36:45,382 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 10:36:45,396 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:36:45" (1/1) ... [2019-11-20 10:36:45,396 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:36:45" (1/1) ... [2019-11-20 10:36:45,423 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:36:45" (1/1) ... [2019-11-20 10:36:45,424 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:36:45" (1/1) ... [2019-11-20 10:36:45,451 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:36:45" (1/1) ... [2019-11-20 10:36:45,463 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:36:45" (1/1) ... [2019-11-20 10:36:45,469 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:36:45" (1/1) ... [2019-11-20 10:36:45,478 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 10:36:45,479 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 10:36:45,479 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 10:36:45,479 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 10:36:45,480 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:36:45" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c02b6c03-0488-486f-8d7e-c7e4405a9092/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 10:36:45,541 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-20 10:36:45,541 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 10:36:45,541 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-20 10:36:45,542 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-20 10:36:45,542 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-20 10:36:45,543 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-20 10:36:45,543 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-20 10:36:45,544 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-20 10:36:45,544 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-20 10:36:45,545 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-20 10:36:45,545 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-20 10:36:45,545 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-20 10:36:45,546 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-20 10:36:45,546 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-20 10:36:45,546 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-20 10:36:45,547 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-20 10:36:45,547 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-20 10:36:45,547 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-20 10:36:45,548 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-20 10:36:45,548 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-20 10:36:45,548 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-20 10:36:45,548 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-20 10:36:45,549 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-20 10:36:45,549 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-20 10:36:45,549 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-20 10:36:45,550 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-20 10:36:45,550 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-20 10:36:45,551 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-20 10:36:45,551 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-20 10:36:45,551 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-20 10:36:45,551 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-20 10:36:45,552 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-20 10:36:45,552 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-20 10:36:45,552 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-20 10:36:45,552 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-20 10:36:45,552 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-20 10:36:45,553 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-20 10:36:45,553 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-20 10:36:45,553 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-20 10:36:45,553 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-20 10:36:45,553 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-20 10:36:45,554 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-20 10:36:45,554 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-20 10:36:45,554 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-20 10:36:45,556 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-20 10:36:45,556 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-20 10:36:45,556 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-20 10:36:45,556 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-20 10:36:45,557 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-20 10:36:45,557 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-20 10:36:45,557 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-20 10:36:45,557 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-20 10:36:45,558 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-20 10:36:45,558 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-20 10:36:45,558 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-20 10:36:45,558 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-20 10:36:45,558 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-20 10:36:45,559 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-11-20 10:36:45,559 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-20 10:36:45,559 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-20 10:36:45,560 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-20 10:36:45,560 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-11-20 10:36:45,560 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-20 10:36:45,560 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-20 10:36:45,561 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-11-20 10:36:45,561 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-20 10:36:45,561 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-20 10:36:45,562 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-11-20 10:36:45,563 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-20 10:36:45,563 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-20 10:36:45,563 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-20 10:36:45,564 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-20 10:36:45,564 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-20 10:36:45,565 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-20 10:36:45,566 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-20 10:36:45,566 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-20 10:36:45,567 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-20 10:36:45,567 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-20 10:36:45,567 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-20 10:36:45,567 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-20 10:36:45,568 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-20 10:36:45,568 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-20 10:36:45,568 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-20 10:36:45,568 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-20 10:36:45,569 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-20 10:36:45,569 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-20 10:36:45,569 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-20 10:36:45,569 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-20 10:36:45,570 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-20 10:36:45,570 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-20 10:36:45,570 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-20 10:36:45,570 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-20 10:36:45,571 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-20 10:36:45,571 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-20 10:36:45,571 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-20 10:36:45,571 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-20 10:36:45,572 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-20 10:36:45,572 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-20 10:36:45,572 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-20 10:36:45,572 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-20 10:36:45,573 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-20 10:36:45,573 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-20 10:36:45,573 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-20 10:36:45,573 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-20 10:36:45,574 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-20 10:36:45,574 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-20 10:36:45,574 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-20 10:36:45,574 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-20 10:36:45,574 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-20 10:36:45,575 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-20 10:36:45,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-20 10:36:45,575 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-20 10:36:45,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-20 10:36:45,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-20 10:36:45,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 10:36:46,874 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 10:36:46,875 INFO L285 CfgBuilder]: Removed 30 assume(true) statements. [2019-11-20 10:36:46,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:36:46 BoogieIcfgContainer [2019-11-20 10:36:46,876 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 10:36:46,877 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 10:36:46,878 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 10:36:46,881 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 10:36:46,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:36:44" (1/3) ... [2019-11-20 10:36:46,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@636a30ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:36:46, skipping insertion in model container [2019-11-20 10:36:46,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:36:45" (2/3) ... [2019-11-20 10:36:46,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@636a30ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:36:46, skipping insertion in model container [2019-11-20 10:36:46,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:36:46" (3/3) ... [2019-11-20 10:36:46,888 INFO L109 eAbstractionObserver]: Analyzing ICFG dll-01-2.i [2019-11-20 10:36:46,899 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 10:36:46,908 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 73 error locations. [2019-11-20 10:36:46,922 INFO L249 AbstractCegarLoop]: Starting to check reachability of 73 error locations. [2019-11-20 10:36:46,949 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 10:36:46,949 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-20 10:36:46,949 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 10:36:46,949 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 10:36:46,950 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 10:36:46,951 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 10:36:46,951 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 10:36:46,951 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 10:36:46,984 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states. [2019-11-20 10:36:46,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-20 10:36:46,995 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:36:46,996 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-20 10:36:47,006 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr51REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr30REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr49REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr69ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr45REQUIRES_VIOLATION, mainErr68REQUIRES_VIOLATION, mainErr47REQUIRES_VIOLATION, mainErr66REQUIRES_VIOLATION, mainErr43REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr40REQUIRES_VIOLATION, mainErr61REQUIRES_VIOLATION, mainErr72ENSURES_VIOLATIONMEMORY_LEAK, mainErr17REQUIRES_VIOLATION, mainErr38REQUIRES_VIOLATION, mainErr59REQUIRES_VIOLATION, mainErr57REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr34REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr36REQUIRES_VIOLATION, mainErr32REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr53REQUIRES_VIOLATION, mainErr55REQUIRES_VIOLATION, mainErr64ASSERT_VIOLATIONMEMORY_FREE, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr50REQUIRES_VIOLATION, mainErr31REQUIRES_VIOLATION, mainErr52REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr48REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr46REQUIRES_VIOLATION, mainErr67REQUIRES_VIOLATION, mainErr65REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr42REQUIRES_VIOLATION, mainErr63ASSERT_VIOLATIONMEMORY_FREE, mainErr23REQUIRES_VIOLATION, mainErr44REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr41REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr71ASSERT_VIOLATIONMEMORY_FREE, mainErr37REQUIRES_VIOLATION, mainErr60REQUIRES_VIOLATION, mainErr39REQUIRES_VIOLATION, mainErr58REQUIRES_VIOLATION, mainErr35REQUIRES_VIOLATION, mainErr62ASSERT_VIOLATIONMEMORY_FREE, mainErr14REQUIRES_VIOLATION, mainErr56REQUIRES_VIOLATION, mainErr70ASSERT_VIOLATIONMEMORY_FREE, mainErr10REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr33REQUIRES_VIOLATION, mainErr54REQUIRES_VIOLATION]=== [2019-11-20 10:36:47,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:36:47,015 INFO L82 PathProgramCache]: Analyzing trace with hash -928996123, now seen corresponding path program 1 times [2019-11-20 10:36:47,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 10:36:47,027 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1275797385] [2019-11-20 10:36:47,028 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c02b6c03-0488-486f-8d7e-c7e4405a9092/bin/uautomizer/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:36:47,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:36:47,301 INFO L255 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-20 10:36:47,308 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:36:47,385 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-20 10:36:47,386 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:36:47,394 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:36:47,394 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:36:47,395 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 10:36:47,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:36:47,407 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 10:36:47,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:36:47,421 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1275797385] [2019-11-20 10:36:47,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 10:36:47,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-20 10:36:47,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037581510] [2019-11-20 10:36:47,431 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 10:36:47,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 10:36:47,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 10:36:47,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 10:36:47,451 INFO L87 Difference]: Start difference. First operand 176 states. Second operand 3 states. [2019-11-20 10:36:47,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:36:47,918 INFO L93 Difference]: Finished difference Result 173 states and 183 transitions. [2019-11-20 10:36:47,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 10:36:47,921 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2019-11-20 10:36:47,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:36:47,937 INFO L225 Difference]: With dead ends: 173 [2019-11-20 10:36:47,938 INFO L226 Difference]: Without dead ends: 169 [2019-11-20 10:36:47,940 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 10:36:47,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2019-11-20 10:36:48,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 165. [2019-11-20 10:36:48,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2019-11-20 10:36:48,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 176 transitions. [2019-11-20 10:36:48,024 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 176 transitions. Word has length 7 [2019-11-20 10:36:48,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:36:48,025 INFO L462 AbstractCegarLoop]: Abstraction has 165 states and 176 transitions. [2019-11-20 10:36:48,025 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 10:36:48,025 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 176 transitions. [2019-11-20 10:36:48,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-20 10:36:48,026 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:36:48,026 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-20 10:36:48,229 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:36:48,229 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr51REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr30REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr49REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr69ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr45REQUIRES_VIOLATION, mainErr68REQUIRES_VIOLATION, mainErr47REQUIRES_VIOLATION, mainErr66REQUIRES_VIOLATION, mainErr43REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr40REQUIRES_VIOLATION, mainErr61REQUIRES_VIOLATION, mainErr72ENSURES_VIOLATIONMEMORY_LEAK, mainErr17REQUIRES_VIOLATION, mainErr38REQUIRES_VIOLATION, mainErr59REQUIRES_VIOLATION, mainErr57REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr34REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr36REQUIRES_VIOLATION, mainErr32REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr53REQUIRES_VIOLATION, mainErr55REQUIRES_VIOLATION, mainErr64ASSERT_VIOLATIONMEMORY_FREE, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr50REQUIRES_VIOLATION, mainErr31REQUIRES_VIOLATION, mainErr52REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr48REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr46REQUIRES_VIOLATION, mainErr67REQUIRES_VIOLATION, mainErr65REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr42REQUIRES_VIOLATION, mainErr63ASSERT_VIOLATIONMEMORY_FREE, mainErr23REQUIRES_VIOLATION, mainErr44REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr41REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr71ASSERT_VIOLATIONMEMORY_FREE, mainErr37REQUIRES_VIOLATION, mainErr60REQUIRES_VIOLATION, mainErr39REQUIRES_VIOLATION, mainErr58REQUIRES_VIOLATION, mainErr35REQUIRES_VIOLATION, mainErr62ASSERT_VIOLATIONMEMORY_FREE, mainErr14REQUIRES_VIOLATION, mainErr56REQUIRES_VIOLATION, mainErr70ASSERT_VIOLATIONMEMORY_FREE, mainErr10REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr33REQUIRES_VIOLATION, mainErr54REQUIRES_VIOLATION]=== [2019-11-20 10:36:48,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:36:48,229 INFO L82 PathProgramCache]: Analyzing trace with hash -928996122, now seen corresponding path program 1 times [2019-11-20 10:36:48,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 10:36:48,230 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [38580512] [2019-11-20 10:36:48,230 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c02b6c03-0488-486f-8d7e-c7e4405a9092/bin/uautomizer/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:36:48,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:36:48,429 INFO L255 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-20 10:36:48,430 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:36:48,447 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-20 10:36:48,447 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:36:48,456 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:36:48,456 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:36:48,456 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-20 10:36:48,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:36:48,468 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 10:36:48,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:36:48,514 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [38580512] [2019-11-20 10:36:48,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 10:36:48,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-11-20 10:36:48,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988940237] [2019-11-20 10:36:48,516 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 10:36:48,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 10:36:48,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 10:36:48,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-20 10:36:48,516 INFO L87 Difference]: Start difference. First operand 165 states and 176 transitions. Second operand 4 states. [2019-11-20 10:36:49,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:36:49,055 INFO L93 Difference]: Finished difference Result 188 states and 198 transitions. [2019-11-20 10:36:49,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-20 10:36:49,057 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-11-20 10:36:49,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:36:49,059 INFO L225 Difference]: With dead ends: 188 [2019-11-20 10:36:49,059 INFO L226 Difference]: Without dead ends: 188 [2019-11-20 10:36:49,060 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-20 10:36:49,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2019-11-20 10:36:49,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 174. [2019-11-20 10:36:49,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2019-11-20 10:36:49,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 193 transitions. [2019-11-20 10:36:49,079 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 193 transitions. Word has length 7 [2019-11-20 10:36:49,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:36:49,079 INFO L462 AbstractCegarLoop]: Abstraction has 174 states and 193 transitions. [2019-11-20 10:36:49,080 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 10:36:49,080 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 193 transitions. [2019-11-20 10:36:49,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-20 10:36:49,081 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:36:49,081 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 10:36:49,281 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:36:49,282 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr51REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr30REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr49REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr69ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr45REQUIRES_VIOLATION, mainErr68REQUIRES_VIOLATION, mainErr47REQUIRES_VIOLATION, mainErr66REQUIRES_VIOLATION, mainErr43REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr40REQUIRES_VIOLATION, mainErr61REQUIRES_VIOLATION, mainErr72ENSURES_VIOLATIONMEMORY_LEAK, mainErr17REQUIRES_VIOLATION, mainErr38REQUIRES_VIOLATION, mainErr59REQUIRES_VIOLATION, mainErr57REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr34REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr36REQUIRES_VIOLATION, mainErr32REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr53REQUIRES_VIOLATION, mainErr55REQUIRES_VIOLATION, mainErr64ASSERT_VIOLATIONMEMORY_FREE, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr50REQUIRES_VIOLATION, mainErr31REQUIRES_VIOLATION, mainErr52REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr48REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr46REQUIRES_VIOLATION, mainErr67REQUIRES_VIOLATION, mainErr65REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr42REQUIRES_VIOLATION, mainErr63ASSERT_VIOLATIONMEMORY_FREE, mainErr23REQUIRES_VIOLATION, mainErr44REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr41REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr71ASSERT_VIOLATIONMEMORY_FREE, mainErr37REQUIRES_VIOLATION, mainErr60REQUIRES_VIOLATION, mainErr39REQUIRES_VIOLATION, mainErr58REQUIRES_VIOLATION, mainErr35REQUIRES_VIOLATION, mainErr62ASSERT_VIOLATIONMEMORY_FREE, mainErr14REQUIRES_VIOLATION, mainErr56REQUIRES_VIOLATION, mainErr70ASSERT_VIOLATIONMEMORY_FREE, mainErr10REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr33REQUIRES_VIOLATION, mainErr54REQUIRES_VIOLATION]=== [2019-11-20 10:36:49,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:36:49,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1652990571, now seen corresponding path program 1 times [2019-11-20 10:36:49,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 10:36:49,284 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [304529077] [2019-11-20 10:36:49,284 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c02b6c03-0488-486f-8d7e-c7e4405a9092/bin/uautomizer/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:36:49,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:36:49,526 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-20 10:36:49,528 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:36:49,571 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:36:49,572 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 30 [2019-11-20 10:36:49,575 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:36:49,602 INFO L567 ElimStorePlain]: treesize reduction 14, result has 44.0 percent of original size [2019-11-20 10:36:49,603 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:36:49,603 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:14, output treesize:11 [2019-11-20 10:36:49,668 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2019-11-20 10:36:49,668 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:36:49,686 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:36:49,687 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:36:49,688 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2019-11-20 10:36:49,724 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 9 [2019-11-20 10:36:49,725 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:36:49,733 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:36:49,734 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 10:36:49,734 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:28, output treesize:13 [2019-11-20 10:36:49,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:36:49,759 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 10:36:49,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:36:49,799 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [304529077] [2019-11-20 10:36:49,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 10:36:49,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2019-11-20 10:36:49,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192504906] [2019-11-20 10:36:49,800 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-20 10:36:49,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 10:36:49,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-20 10:36:49,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-20 10:36:49,801 INFO L87 Difference]: Start difference. First operand 174 states and 193 transitions. Second operand 8 states. [2019-11-20 10:36:51,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:36:51,109 INFO L93 Difference]: Finished difference Result 301 states and 327 transitions. [2019-11-20 10:36:51,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 10:36:51,110 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2019-11-20 10:36:51,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:36:51,113 INFO L225 Difference]: With dead ends: 301 [2019-11-20 10:36:51,113 INFO L226 Difference]: Without dead ends: 301 [2019-11-20 10:36:51,114 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2019-11-20 10:36:51,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2019-11-20 10:36:51,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 173. [2019-11-20 10:36:51,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2019-11-20 10:36:51,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 192 transitions. [2019-11-20 10:36:51,146 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 192 transitions. Word has length 14 [2019-11-20 10:36:51,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:36:51,147 INFO L462 AbstractCegarLoop]: Abstraction has 173 states and 192 transitions. [2019-11-20 10:36:51,147 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-20 10:36:51,147 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 192 transitions. [2019-11-20 10:36:51,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-20 10:36:51,148 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:36:51,148 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 10:36:51,351 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:36:51,352 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr51REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr30REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr49REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr69ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr45REQUIRES_VIOLATION, mainErr68REQUIRES_VIOLATION, mainErr47REQUIRES_VIOLATION, mainErr66REQUIRES_VIOLATION, mainErr43REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr40REQUIRES_VIOLATION, mainErr61REQUIRES_VIOLATION, mainErr72ENSURES_VIOLATIONMEMORY_LEAK, mainErr17REQUIRES_VIOLATION, mainErr38REQUIRES_VIOLATION, mainErr59REQUIRES_VIOLATION, mainErr57REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr34REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr36REQUIRES_VIOLATION, mainErr32REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr53REQUIRES_VIOLATION, mainErr55REQUIRES_VIOLATION, mainErr64ASSERT_VIOLATIONMEMORY_FREE, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr50REQUIRES_VIOLATION, mainErr31REQUIRES_VIOLATION, mainErr52REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr48REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr46REQUIRES_VIOLATION, mainErr67REQUIRES_VIOLATION, mainErr65REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr42REQUIRES_VIOLATION, mainErr63ASSERT_VIOLATIONMEMORY_FREE, mainErr23REQUIRES_VIOLATION, mainErr44REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr41REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr71ASSERT_VIOLATIONMEMORY_FREE, mainErr37REQUIRES_VIOLATION, mainErr60REQUIRES_VIOLATION, mainErr39REQUIRES_VIOLATION, mainErr58REQUIRES_VIOLATION, mainErr35REQUIRES_VIOLATION, mainErr62ASSERT_VIOLATIONMEMORY_FREE, mainErr14REQUIRES_VIOLATION, mainErr56REQUIRES_VIOLATION, mainErr70ASSERT_VIOLATIONMEMORY_FREE, mainErr10REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr33REQUIRES_VIOLATION, mainErr54REQUIRES_VIOLATION]=== [2019-11-20 10:36:51,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:36:51,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1652990572, now seen corresponding path program 1 times [2019-11-20 10:36:51,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 10:36:51,353 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [450513766] [2019-11-20 10:36:51,353 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c02b6c03-0488-486f-8d7e-c7e4405a9092/bin/uautomizer/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:36:51,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:36:51,552 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 10:36:51,554 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:36:51,562 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-20 10:36:51,562 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:36:51,569 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:36:51,570 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:36:51,570 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-20 10:36:51,594 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2019-11-20 10:36:51,594 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:36:51,609 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:36:51,614 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2019-11-20 10:36:51,615 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 10:36:51,626 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:36:51,627 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:36:51,628 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:34, output treesize:23 [2019-11-20 10:36:51,652 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23 treesize of output 11 [2019-11-20 10:36:51,653 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:36:51,675 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:36:51,682 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 7 [2019-11-20 10:36:51,683 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 10:36:51,691 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:36:51,692 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:36:51,692 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:9 [2019-11-20 10:36:51,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:36:51,710 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 10:36:51,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:36:51,852 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [450513766] [2019-11-20 10:36:51,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 10:36:51,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2019-11-20 10:36:51,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708616749] [2019-11-20 10:36:51,853 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-20 10:36:51,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 10:36:51,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-20 10:36:51,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-20 10:36:51,854 INFO L87 Difference]: Start difference. First operand 173 states and 192 transitions. Second operand 8 states. [2019-11-20 10:36:53,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:36:53,618 INFO L93 Difference]: Finished difference Result 323 states and 360 transitions. [2019-11-20 10:36:53,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 10:36:53,619 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2019-11-20 10:36:53,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:36:53,624 INFO L225 Difference]: With dead ends: 323 [2019-11-20 10:36:53,624 INFO L226 Difference]: Without dead ends: 323 [2019-11-20 10:36:53,624 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2019-11-20 10:36:53,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2019-11-20 10:36:53,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 172. [2019-11-20 10:36:53,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2019-11-20 10:36:53,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 191 transitions. [2019-11-20 10:36:53,645 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 191 transitions. Word has length 14 [2019-11-20 10:36:53,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:36:53,645 INFO L462 AbstractCegarLoop]: Abstraction has 172 states and 191 transitions. [2019-11-20 10:36:53,645 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-20 10:36:53,646 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 191 transitions. [2019-11-20 10:36:53,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-20 10:36:53,646 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:36:53,646 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 10:36:53,850 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:36:53,851 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr51REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr30REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr49REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr69ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr45REQUIRES_VIOLATION, mainErr68REQUIRES_VIOLATION, mainErr47REQUIRES_VIOLATION, mainErr66REQUIRES_VIOLATION, mainErr43REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr40REQUIRES_VIOLATION, mainErr61REQUIRES_VIOLATION, mainErr72ENSURES_VIOLATIONMEMORY_LEAK, mainErr17REQUIRES_VIOLATION, mainErr38REQUIRES_VIOLATION, mainErr59REQUIRES_VIOLATION, mainErr57REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr34REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr36REQUIRES_VIOLATION, mainErr32REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr53REQUIRES_VIOLATION, mainErr55REQUIRES_VIOLATION, mainErr64ASSERT_VIOLATIONMEMORY_FREE, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr50REQUIRES_VIOLATION, mainErr31REQUIRES_VIOLATION, mainErr52REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr48REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr46REQUIRES_VIOLATION, mainErr67REQUIRES_VIOLATION, mainErr65REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr42REQUIRES_VIOLATION, mainErr63ASSERT_VIOLATIONMEMORY_FREE, mainErr23REQUIRES_VIOLATION, mainErr44REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr41REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr71ASSERT_VIOLATIONMEMORY_FREE, mainErr37REQUIRES_VIOLATION, mainErr60REQUIRES_VIOLATION, mainErr39REQUIRES_VIOLATION, mainErr58REQUIRES_VIOLATION, mainErr35REQUIRES_VIOLATION, mainErr62ASSERT_VIOLATIONMEMORY_FREE, mainErr14REQUIRES_VIOLATION, mainErr56REQUIRES_VIOLATION, mainErr70ASSERT_VIOLATIONMEMORY_FREE, mainErr10REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr33REQUIRES_VIOLATION, mainErr54REQUIRES_VIOLATION]=== [2019-11-20 10:36:53,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:36:53,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1852903323, now seen corresponding path program 1 times [2019-11-20 10:36:53,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 10:36:53,852 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [713854027] [2019-11-20 10:36:53,852 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c02b6c03-0488-486f-8d7e-c7e4405a9092/bin/uautomizer/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:36:54,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:36:54,084 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-20 10:36:54,086 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:36:54,095 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-20 10:36:54,095 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:36:54,099 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:36:54,099 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:36:54,099 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 10:36:54,110 INFO L392 ElimStorePlain]: Different costs {0=[|v_#length_83|], 1=[|v_#valid_108|]} [2019-11-20 10:36:54,115 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-20 10:36:54,115 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:36:54,129 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:36:54,138 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:36:54,138 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2019-11-20 10:36:54,139 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 10:36:54,147 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:36:54,147 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:36:54,147 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:22, output treesize:13 [2019-11-20 10:36:54,171 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-11-20 10:36:54,171 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:36:54,202 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:36:54,209 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-11-20 10:36:54,209 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 10:36:54,230 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:36:54,231 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:36:54,231 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:33 [2019-11-20 10:36:54,324 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:36:54,325 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 72 [2019-11-20 10:36:54,326 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 10:36:54,330 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:36:54,375 INFO L567 ElimStorePlain]: treesize reduction 26, result has 72.6 percent of original size [2019-11-20 10:36:54,387 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 26 [2019-11-20 10:36:54,388 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 10:36:54,409 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:36:54,410 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 10:36:54,411 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:79, output treesize:59 [2019-11-20 10:36:54,501 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:36:54,501 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 42 [2019-11-20 10:36:54,503 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:36:54,538 INFO L567 ElimStorePlain]: treesize reduction 14, result has 71.4 percent of original size [2019-11-20 10:36:54,541 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2019-11-20 10:36:54,542 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 10:36:54,551 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:36:54,552 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:36:54,552 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:77, output treesize:9 [2019-11-20 10:36:54,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:36:54,572 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 10:36:55,786 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:36:56,195 WARN L191 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2019-11-20 10:36:56,196 INFO L567 ElimStorePlain]: treesize reduction 12, result has 91.7 percent of original size [2019-11-20 10:36:56,205 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 10:36:56,373 WARN L191 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2019-11-20 10:36:56,374 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:36:56,392 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-11-20 10:36:56,709 WARN L191 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2019-11-20 10:36:56,710 INFO L567 ElimStorePlain]: treesize reduction 56, result has 61.9 percent of original size [2019-11-20 10:36:56,725 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-11-20 10:36:56,991 WARN L191 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2019-11-20 10:36:56,991 INFO L567 ElimStorePlain]: treesize reduction 12, result has 84.8 percent of original size [2019-11-20 10:36:56,992 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 10:36:56,993 INFO L496 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 4 dim-2 vars, End of recursive call: and 4 xjuncts. [2019-11-20 10:36:56,993 INFO L221 ElimStorePlain]: Needed 5 recursive calls to eliminate 10 variables, input treesize:190, output treesize:34 [2019-11-20 10:36:57,130 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2019-11-20 10:36:57,132 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:36:57,137 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:36:57,137 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:36:57,138 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:10 [2019-11-20 10:36:57,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:36:57,176 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [713854027] [2019-11-20 10:36:57,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 10:36:57,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 13 [2019-11-20 10:36:57,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883880031] [2019-11-20 10:36:57,177 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-20 10:36:57,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 10:36:57,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-20 10:36:57,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2019-11-20 10:36:57,178 INFO L87 Difference]: Start difference. First operand 172 states and 191 transitions. Second operand 14 states. [2019-11-20 10:37:03,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:37:03,413 INFO L93 Difference]: Finished difference Result 301 states and 327 transitions. [2019-11-20 10:37:03,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-20 10:37:03,414 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2019-11-20 10:37:03,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:37:03,417 INFO L225 Difference]: With dead ends: 301 [2019-11-20 10:37:03,417 INFO L226 Difference]: Without dead ends: 301 [2019-11-20 10:37:03,417 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2019-11-20 10:37:03,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2019-11-20 10:37:03,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 171. [2019-11-20 10:37:03,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2019-11-20 10:37:03,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 190 transitions. [2019-11-20 10:37:03,431 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 190 transitions. Word has length 17 [2019-11-20 10:37:03,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:37:03,431 INFO L462 AbstractCegarLoop]: Abstraction has 171 states and 190 transitions. [2019-11-20 10:37:03,431 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-20 10:37:03,432 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 190 transitions. [2019-11-20 10:37:03,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-20 10:37:03,432 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:37:03,433 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 10:37:03,636 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:37:03,636 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr51REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr30REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr49REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr69ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr45REQUIRES_VIOLATION, mainErr68REQUIRES_VIOLATION, mainErr47REQUIRES_VIOLATION, mainErr66REQUIRES_VIOLATION, mainErr43REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr40REQUIRES_VIOLATION, mainErr61REQUIRES_VIOLATION, mainErr72ENSURES_VIOLATIONMEMORY_LEAK, mainErr17REQUIRES_VIOLATION, mainErr38REQUIRES_VIOLATION, mainErr59REQUIRES_VIOLATION, mainErr57REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr34REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr36REQUIRES_VIOLATION, mainErr32REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr53REQUIRES_VIOLATION, mainErr55REQUIRES_VIOLATION, mainErr64ASSERT_VIOLATIONMEMORY_FREE, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr50REQUIRES_VIOLATION, mainErr31REQUIRES_VIOLATION, mainErr52REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr48REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr46REQUIRES_VIOLATION, mainErr67REQUIRES_VIOLATION, mainErr65REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr42REQUIRES_VIOLATION, mainErr63ASSERT_VIOLATIONMEMORY_FREE, mainErr23REQUIRES_VIOLATION, mainErr44REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr41REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr71ASSERT_VIOLATIONMEMORY_FREE, mainErr37REQUIRES_VIOLATION, mainErr60REQUIRES_VIOLATION, mainErr39REQUIRES_VIOLATION, mainErr58REQUIRES_VIOLATION, mainErr35REQUIRES_VIOLATION, mainErr62ASSERT_VIOLATIONMEMORY_FREE, mainErr14REQUIRES_VIOLATION, mainErr56REQUIRES_VIOLATION, mainErr70ASSERT_VIOLATIONMEMORY_FREE, mainErr10REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr33REQUIRES_VIOLATION, mainErr54REQUIRES_VIOLATION]=== [2019-11-20 10:37:03,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:37:03,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1852903324, now seen corresponding path program 1 times [2019-11-20 10:37:03,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 10:37:03,637 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [477599493] [2019-11-20 10:37:03,637 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c02b6c03-0488-486f-8d7e-c7e4405a9092/bin/uautomizer/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:37:03,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:37:03,857 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 10:37:03,858 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:37:03,865 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-20 10:37:03,866 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:37:03,868 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:03,868 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:37:03,868 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 10:37:03,897 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:03,898 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 41 [2019-11-20 10:37:03,899 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:37:03,920 INFO L567 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2019-11-20 10:37:03,920 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:37:03,920 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2019-11-20 10:37:03,938 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-11-20 10:37:03,938 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:37:03,952 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:03,953 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:37:03,953 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:29 [2019-11-20 10:37:04,038 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:04,038 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 59 [2019-11-20 10:37:04,039 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 10:37:04,040 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:37:04,088 INFO L567 ElimStorePlain]: treesize reduction 26, result has 61.8 percent of original size [2019-11-20 10:37:04,088 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 10:37:04,089 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:42 [2019-11-20 10:37:04,170 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:04,170 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 33 [2019-11-20 10:37:04,171 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:37:04,193 INFO L567 ElimStorePlain]: treesize reduction 14, result has 54.8 percent of original size [2019-11-20 10:37:04,194 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 10:37:04,194 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:51, output treesize:17 [2019-11-20 10:37:04,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:37:04,229 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 10:37:04,387 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:37:04,413 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:04,414 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 10:37:04,415 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2019-11-20 10:37:04,415 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:39, output treesize:20 [2019-11-20 10:37:04,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:37:04,478 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [477599493] [2019-11-20 10:37:04,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 10:37:04,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 13 [2019-11-20 10:37:04,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613114586] [2019-11-20 10:37:04,479 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-20 10:37:04,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 10:37:04,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-20 10:37:04,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-11-20 10:37:04,479 INFO L87 Difference]: Start difference. First operand 171 states and 190 transitions. Second operand 14 states. [2019-11-20 10:37:05,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:37:05,843 INFO L93 Difference]: Finished difference Result 298 states and 324 transitions. [2019-11-20 10:37:05,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-20 10:37:05,843 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2019-11-20 10:37:05,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:37:05,845 INFO L225 Difference]: With dead ends: 298 [2019-11-20 10:37:05,845 INFO L226 Difference]: Without dead ends: 298 [2019-11-20 10:37:05,846 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2019-11-20 10:37:05,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2019-11-20 10:37:05,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 170. [2019-11-20 10:37:05,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2019-11-20 10:37:05,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 189 transitions. [2019-11-20 10:37:05,856 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 189 transitions. Word has length 17 [2019-11-20 10:37:05,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:37:05,857 INFO L462 AbstractCegarLoop]: Abstraction has 170 states and 189 transitions. [2019-11-20 10:37:05,857 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-20 10:37:05,857 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 189 transitions. [2019-11-20 10:37:05,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-20 10:37:05,858 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:37:05,858 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 10:37:06,063 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:37:06,063 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr51REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr30REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr49REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr69ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr45REQUIRES_VIOLATION, mainErr68REQUIRES_VIOLATION, mainErr47REQUIRES_VIOLATION, mainErr66REQUIRES_VIOLATION, mainErr43REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr40REQUIRES_VIOLATION, mainErr61REQUIRES_VIOLATION, mainErr72ENSURES_VIOLATIONMEMORY_LEAK, mainErr17REQUIRES_VIOLATION, mainErr38REQUIRES_VIOLATION, mainErr59REQUIRES_VIOLATION, mainErr57REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr34REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr36REQUIRES_VIOLATION, mainErr32REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr53REQUIRES_VIOLATION, mainErr55REQUIRES_VIOLATION, mainErr64ASSERT_VIOLATIONMEMORY_FREE, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr50REQUIRES_VIOLATION, mainErr31REQUIRES_VIOLATION, mainErr52REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr48REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr46REQUIRES_VIOLATION, mainErr67REQUIRES_VIOLATION, mainErr65REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr42REQUIRES_VIOLATION, mainErr63ASSERT_VIOLATIONMEMORY_FREE, mainErr23REQUIRES_VIOLATION, mainErr44REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr41REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr71ASSERT_VIOLATIONMEMORY_FREE, mainErr37REQUIRES_VIOLATION, mainErr60REQUIRES_VIOLATION, mainErr39REQUIRES_VIOLATION, mainErr58REQUIRES_VIOLATION, mainErr35REQUIRES_VIOLATION, mainErr62ASSERT_VIOLATIONMEMORY_FREE, mainErr14REQUIRES_VIOLATION, mainErr56REQUIRES_VIOLATION, mainErr70ASSERT_VIOLATIONMEMORY_FREE, mainErr10REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr33REQUIRES_VIOLATION, mainErr54REQUIRES_VIOLATION]=== [2019-11-20 10:37:06,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:37:06,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1509165795, now seen corresponding path program 1 times [2019-11-20 10:37:06,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 10:37:06,064 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1751975351] [2019-11-20 10:37:06,064 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c02b6c03-0488-486f-8d7e-c7e4405a9092/bin/uautomizer/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:37:06,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:37:06,253 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 10:37:06,255 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:37:06,264 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2019-11-20 10:37:06,264 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:37:06,274 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:06,278 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2019-11-20 10:37:06,279 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 10:37:06,286 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:06,287 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:37:06,287 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:27, output treesize:19 [2019-11-20 10:37:06,319 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 7 [2019-11-20 10:37:06,319 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:37:06,336 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:06,340 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 7 [2019-11-20 10:37:06,340 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 10:37:06,347 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:06,347 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:37:06,347 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:37, output treesize:7 [2019-11-20 10:37:06,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:37:06,363 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 10:37:06,364 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 10:37:06,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:37:06,371 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1751975351] [2019-11-20 10:37:06,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 10:37:06,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2019-11-20 10:37:06,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300799383] [2019-11-20 10:37:06,372 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-20 10:37:06,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 10:37:06,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 10:37:06,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-20 10:37:06,372 INFO L87 Difference]: Start difference. First operand 170 states and 189 transitions. Second operand 5 states. [2019-11-20 10:37:06,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:37:06,860 INFO L93 Difference]: Finished difference Result 252 states and 276 transitions. [2019-11-20 10:37:06,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 10:37:06,861 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-11-20 10:37:06,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:37:06,863 INFO L225 Difference]: With dead ends: 252 [2019-11-20 10:37:06,863 INFO L226 Difference]: Without dead ends: 252 [2019-11-20 10:37:06,864 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-20 10:37:06,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2019-11-20 10:37:06,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 173. [2019-11-20 10:37:06,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2019-11-20 10:37:06,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 192 transitions. [2019-11-20 10:37:06,876 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 192 transitions. Word has length 20 [2019-11-20 10:37:06,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:37:06,877 INFO L462 AbstractCegarLoop]: Abstraction has 173 states and 192 transitions. [2019-11-20 10:37:06,877 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-20 10:37:06,877 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 192 transitions. [2019-11-20 10:37:06,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-20 10:37:06,878 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:37:06,878 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 10:37:07,081 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:37:07,081 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr51REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr30REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr49REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr69ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr45REQUIRES_VIOLATION, mainErr68REQUIRES_VIOLATION, mainErr47REQUIRES_VIOLATION, mainErr66REQUIRES_VIOLATION, mainErr43REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr40REQUIRES_VIOLATION, mainErr61REQUIRES_VIOLATION, mainErr72ENSURES_VIOLATIONMEMORY_LEAK, mainErr17REQUIRES_VIOLATION, mainErr38REQUIRES_VIOLATION, mainErr59REQUIRES_VIOLATION, mainErr57REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr34REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr36REQUIRES_VIOLATION, mainErr32REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr53REQUIRES_VIOLATION, mainErr55REQUIRES_VIOLATION, mainErr64ASSERT_VIOLATIONMEMORY_FREE, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr50REQUIRES_VIOLATION, mainErr31REQUIRES_VIOLATION, mainErr52REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr48REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr46REQUIRES_VIOLATION, mainErr67REQUIRES_VIOLATION, mainErr65REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr42REQUIRES_VIOLATION, mainErr63ASSERT_VIOLATIONMEMORY_FREE, mainErr23REQUIRES_VIOLATION, mainErr44REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr41REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr71ASSERT_VIOLATIONMEMORY_FREE, mainErr37REQUIRES_VIOLATION, mainErr60REQUIRES_VIOLATION, mainErr39REQUIRES_VIOLATION, mainErr58REQUIRES_VIOLATION, mainErr35REQUIRES_VIOLATION, mainErr62ASSERT_VIOLATIONMEMORY_FREE, mainErr14REQUIRES_VIOLATION, mainErr56REQUIRES_VIOLATION, mainErr70ASSERT_VIOLATIONMEMORY_FREE, mainErr10REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr33REQUIRES_VIOLATION, mainErr54REQUIRES_VIOLATION]=== [2019-11-20 10:37:07,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:37:07,081 INFO L82 PathProgramCache]: Analyzing trace with hash 888643896, now seen corresponding path program 1 times [2019-11-20 10:37:07,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 10:37:07,082 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [804619309] [2019-11-20 10:37:07,082 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c02b6c03-0488-486f-8d7e-c7e4405a9092/bin/uautomizer/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:37:07,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:37:07,246 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 10:37:07,248 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:37:07,256 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-20 10:37:07,256 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:37:07,258 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:07,258 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:37:07,258 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 10:37:07,284 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:07,285 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 28 [2019-11-20 10:37:07,285 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:37:07,307 INFO L567 ElimStorePlain]: treesize reduction 14, result has 44.0 percent of original size [2019-11-20 10:37:07,307 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 10:37:07,307 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:11 [2019-11-20 10:37:07,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:37:07,318 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 10:37:07,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:37:07,346 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [804619309] [2019-11-20 10:37:07,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 10:37:07,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2019-11-20 10:37:07,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077222002] [2019-11-20 10:37:07,346 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 10:37:07,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 10:37:07,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 10:37:07,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-20 10:37:07,347 INFO L87 Difference]: Start difference. First operand 173 states and 192 transitions. Second operand 4 states. [2019-11-20 10:37:07,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:37:07,713 INFO L93 Difference]: Finished difference Result 173 states and 190 transitions. [2019-11-20 10:37:07,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-20 10:37:07,713 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2019-11-20 10:37:07,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:37:07,715 INFO L225 Difference]: With dead ends: 173 [2019-11-20 10:37:07,715 INFO L226 Difference]: Without dead ends: 173 [2019-11-20 10:37:07,715 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-20 10:37:07,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2019-11-20 10:37:07,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 163. [2019-11-20 10:37:07,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2019-11-20 10:37:07,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 182 transitions. [2019-11-20 10:37:07,720 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 182 transitions. Word has length 22 [2019-11-20 10:37:07,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:37:07,720 INFO L462 AbstractCegarLoop]: Abstraction has 163 states and 182 transitions. [2019-11-20 10:37:07,720 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 10:37:07,720 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 182 transitions. [2019-11-20 10:37:07,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-20 10:37:07,721 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:37:07,721 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 10:37:07,921 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:37:07,922 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr51REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr30REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr49REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr69ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr45REQUIRES_VIOLATION, mainErr68REQUIRES_VIOLATION, mainErr47REQUIRES_VIOLATION, mainErr66REQUIRES_VIOLATION, mainErr43REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr40REQUIRES_VIOLATION, mainErr61REQUIRES_VIOLATION, mainErr72ENSURES_VIOLATIONMEMORY_LEAK, mainErr17REQUIRES_VIOLATION, mainErr38REQUIRES_VIOLATION, mainErr59REQUIRES_VIOLATION, mainErr57REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr34REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr36REQUIRES_VIOLATION, mainErr32REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr53REQUIRES_VIOLATION, mainErr55REQUIRES_VIOLATION, mainErr64ASSERT_VIOLATIONMEMORY_FREE, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr50REQUIRES_VIOLATION, mainErr31REQUIRES_VIOLATION, mainErr52REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr48REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr46REQUIRES_VIOLATION, mainErr67REQUIRES_VIOLATION, mainErr65REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr42REQUIRES_VIOLATION, mainErr63ASSERT_VIOLATIONMEMORY_FREE, mainErr23REQUIRES_VIOLATION, mainErr44REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr41REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr71ASSERT_VIOLATIONMEMORY_FREE, mainErr37REQUIRES_VIOLATION, mainErr60REQUIRES_VIOLATION, mainErr39REQUIRES_VIOLATION, mainErr58REQUIRES_VIOLATION, mainErr35REQUIRES_VIOLATION, mainErr62ASSERT_VIOLATIONMEMORY_FREE, mainErr14REQUIRES_VIOLATION, mainErr56REQUIRES_VIOLATION, mainErr70ASSERT_VIOLATIONMEMORY_FREE, mainErr10REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr33REQUIRES_VIOLATION, mainErr54REQUIRES_VIOLATION]=== [2019-11-20 10:37:07,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:37:07,922 INFO L82 PathProgramCache]: Analyzing trace with hash 888643897, now seen corresponding path program 1 times [2019-11-20 10:37:07,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 10:37:07,923 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1742326498] [2019-11-20 10:37:07,923 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c02b6c03-0488-486f-8d7e-c7e4405a9092/bin/uautomizer/cvc4 Starting monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:37:08,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:37:08,113 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 10:37:08,115 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:37:08,134 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-20 10:37:08,134 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:37:08,147 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:08,151 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-20 10:37:08,152 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 10:37:08,161 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:08,162 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:37:08,162 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:16, output treesize:14 [2019-11-20 10:37:08,206 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 10:37:08,208 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2019-11-20 10:37:08,208 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:37:08,224 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:08,238 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:08,238 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2019-11-20 10:37:08,239 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 10:37:08,261 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:08,262 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 10:37:08,262 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:27, output treesize:20 [2019-11-20 10:37:08,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:37:08,283 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 10:37:08,317 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 10:37:08,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:37:08,687 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1742326498] [2019-11-20 10:37:08,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 10:37:08,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2019-11-20 10:37:08,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205412587] [2019-11-20 10:37:08,688 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-20 10:37:08,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 10:37:08,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-20 10:37:08,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-20 10:37:08,689 INFO L87 Difference]: Start difference. First operand 163 states and 182 transitions. Second operand 8 states. [2019-11-20 10:37:09,206 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2019-11-20 10:37:10,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:37:10,828 INFO L93 Difference]: Finished difference Result 217 states and 231 transitions. [2019-11-20 10:37:10,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 10:37:10,829 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2019-11-20 10:37:10,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:37:10,831 INFO L225 Difference]: With dead ends: 217 [2019-11-20 10:37:10,831 INFO L226 Difference]: Without dead ends: 217 [2019-11-20 10:37:10,831 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2019-11-20 10:37:10,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2019-11-20 10:37:10,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 176. [2019-11-20 10:37:10,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2019-11-20 10:37:10,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 202 transitions. [2019-11-20 10:37:10,845 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 202 transitions. Word has length 22 [2019-11-20 10:37:10,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:37:10,848 INFO L462 AbstractCegarLoop]: Abstraction has 176 states and 202 transitions. [2019-11-20 10:37:10,849 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-20 10:37:10,849 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 202 transitions. [2019-11-20 10:37:10,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-20 10:37:10,851 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:37:10,851 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 10:37:11,054 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:37:11,055 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr51REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr30REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr49REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr69ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr45REQUIRES_VIOLATION, mainErr68REQUIRES_VIOLATION, mainErr47REQUIRES_VIOLATION, mainErr66REQUIRES_VIOLATION, mainErr43REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr40REQUIRES_VIOLATION, mainErr61REQUIRES_VIOLATION, mainErr72ENSURES_VIOLATIONMEMORY_LEAK, mainErr17REQUIRES_VIOLATION, mainErr38REQUIRES_VIOLATION, mainErr59REQUIRES_VIOLATION, mainErr57REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr34REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr36REQUIRES_VIOLATION, mainErr32REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr53REQUIRES_VIOLATION, mainErr55REQUIRES_VIOLATION, mainErr64ASSERT_VIOLATIONMEMORY_FREE, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr50REQUIRES_VIOLATION, mainErr31REQUIRES_VIOLATION, mainErr52REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr48REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr46REQUIRES_VIOLATION, mainErr67REQUIRES_VIOLATION, mainErr65REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr42REQUIRES_VIOLATION, mainErr63ASSERT_VIOLATIONMEMORY_FREE, mainErr23REQUIRES_VIOLATION, mainErr44REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr41REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr71ASSERT_VIOLATIONMEMORY_FREE, mainErr37REQUIRES_VIOLATION, mainErr60REQUIRES_VIOLATION, mainErr39REQUIRES_VIOLATION, mainErr58REQUIRES_VIOLATION, mainErr35REQUIRES_VIOLATION, mainErr62ASSERT_VIOLATIONMEMORY_FREE, mainErr14REQUIRES_VIOLATION, mainErr56REQUIRES_VIOLATION, mainErr70ASSERT_VIOLATIONMEMORY_FREE, mainErr10REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr33REQUIRES_VIOLATION, mainErr54REQUIRES_VIOLATION]=== [2019-11-20 10:37:11,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:37:11,055 INFO L82 PathProgramCache]: Analyzing trace with hash -711705829, now seen corresponding path program 1 times [2019-11-20 10:37:11,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 10:37:11,056 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [612792072] [2019-11-20 10:37:11,056 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c02b6c03-0488-486f-8d7e-c7e4405a9092/bin/uautomizer/cvc4 Starting monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:37:11,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:37:11,237 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-20 10:37:11,239 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:37:11,283 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:11,283 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 30 [2019-11-20 10:37:11,284 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:37:11,313 INFO L567 ElimStorePlain]: treesize reduction 14, result has 44.0 percent of original size [2019-11-20 10:37:11,313 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 10:37:11,314 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:14, output treesize:11 [2019-11-20 10:37:11,333 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2019-11-20 10:37:11,333 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:37:11,342 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:11,342 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:37:11,342 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:11 [2019-11-20 10:37:11,363 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 11 [2019-11-20 10:37:11,364 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:37:11,366 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:11,366 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:37:11,367 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:5 [2019-11-20 10:37:11,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:37:11,378 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 10:37:11,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:37:11,388 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [612792072] [2019-11-20 10:37:11,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 10:37:11,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 5 [2019-11-20 10:37:11,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401760930] [2019-11-20 10:37:11,389 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 10:37:11,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 10:37:11,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 10:37:11,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-20 10:37:11,390 INFO L87 Difference]: Start difference. First operand 176 states and 202 transitions. Second operand 6 states. [2019-11-20 10:37:12,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:37:12,018 INFO L93 Difference]: Finished difference Result 257 states and 296 transitions. [2019-11-20 10:37:12,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 10:37:12,018 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2019-11-20 10:37:12,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:37:12,020 INFO L225 Difference]: With dead ends: 257 [2019-11-20 10:37:12,020 INFO L226 Difference]: Without dead ends: 257 [2019-11-20 10:37:12,021 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-11-20 10:37:12,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2019-11-20 10:37:12,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 175. [2019-11-20 10:37:12,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-11-20 10:37:12,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 201 transitions. [2019-11-20 10:37:12,027 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 201 transitions. Word has length 24 [2019-11-20 10:37:12,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:37:12,027 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 201 transitions. [2019-11-20 10:37:12,028 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 10:37:12,028 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 201 transitions. [2019-11-20 10:37:12,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-20 10:37:12,029 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:37:12,029 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 10:37:12,232 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:37:12,232 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr51REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr30REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr49REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr69ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr45REQUIRES_VIOLATION, mainErr68REQUIRES_VIOLATION, mainErr47REQUIRES_VIOLATION, mainErr66REQUIRES_VIOLATION, mainErr43REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr40REQUIRES_VIOLATION, mainErr61REQUIRES_VIOLATION, mainErr72ENSURES_VIOLATIONMEMORY_LEAK, mainErr17REQUIRES_VIOLATION, mainErr38REQUIRES_VIOLATION, mainErr59REQUIRES_VIOLATION, mainErr57REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr34REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr36REQUIRES_VIOLATION, mainErr32REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr53REQUIRES_VIOLATION, mainErr55REQUIRES_VIOLATION, mainErr64ASSERT_VIOLATIONMEMORY_FREE, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr50REQUIRES_VIOLATION, mainErr31REQUIRES_VIOLATION, mainErr52REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr48REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr46REQUIRES_VIOLATION, mainErr67REQUIRES_VIOLATION, mainErr65REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr42REQUIRES_VIOLATION, mainErr63ASSERT_VIOLATIONMEMORY_FREE, mainErr23REQUIRES_VIOLATION, mainErr44REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr41REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr71ASSERT_VIOLATIONMEMORY_FREE, mainErr37REQUIRES_VIOLATION, mainErr60REQUIRES_VIOLATION, mainErr39REQUIRES_VIOLATION, mainErr58REQUIRES_VIOLATION, mainErr35REQUIRES_VIOLATION, mainErr62ASSERT_VIOLATIONMEMORY_FREE, mainErr14REQUIRES_VIOLATION, mainErr56REQUIRES_VIOLATION, mainErr70ASSERT_VIOLATIONMEMORY_FREE, mainErr10REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr33REQUIRES_VIOLATION, mainErr54REQUIRES_VIOLATION]=== [2019-11-20 10:37:12,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:37:12,233 INFO L82 PathProgramCache]: Analyzing trace with hash -711705828, now seen corresponding path program 1 times [2019-11-20 10:37:12,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 10:37:12,234 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1040000688] [2019-11-20 10:37:12,234 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c02b6c03-0488-486f-8d7e-c7e4405a9092/bin/uautomizer/cvc4 Starting monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:37:12,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:37:12,406 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 10:37:12,407 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:37:12,414 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-20 10:37:12,414 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:37:12,419 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:12,419 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:37:12,419 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-20 10:37:12,432 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2019-11-20 10:37:12,432 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:37:12,444 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:12,447 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2019-11-20 10:37:12,447 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 10:37:12,456 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:12,457 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:37:12,457 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:28, output treesize:19 [2019-11-20 10:37:12,481 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 11 [2019-11-20 10:37:12,482 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:37:12,490 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:12,493 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2019-11-20 10:37:12,493 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 10:37:12,499 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:12,499 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:37:12,500 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:33, output treesize:11 [2019-11-20 10:37:12,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:37:12,512 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 10:37:12,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:37:12,693 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1040000688] [2019-11-20 10:37:12,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 10:37:12,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2019-11-20 10:37:12,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547854416] [2019-11-20 10:37:12,694 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-20 10:37:12,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 10:37:12,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-20 10:37:12,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-20 10:37:12,695 INFO L87 Difference]: Start difference. First operand 175 states and 201 transitions. Second operand 8 states. [2019-11-20 10:37:13,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:37:13,996 INFO L93 Difference]: Finished difference Result 279 states and 327 transitions. [2019-11-20 10:37:13,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 10:37:13,998 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2019-11-20 10:37:13,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:37:14,000 INFO L225 Difference]: With dead ends: 279 [2019-11-20 10:37:14,000 INFO L226 Difference]: Without dead ends: 279 [2019-11-20 10:37:14,000 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2019-11-20 10:37:14,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2019-11-20 10:37:14,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 174. [2019-11-20 10:37:14,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2019-11-20 10:37:14,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 200 transitions. [2019-11-20 10:37:14,007 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 200 transitions. Word has length 24 [2019-11-20 10:37:14,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:37:14,007 INFO L462 AbstractCegarLoop]: Abstraction has 174 states and 200 transitions. [2019-11-20 10:37:14,007 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-20 10:37:14,008 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 200 transitions. [2019-11-20 10:37:14,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-20 10:37:14,009 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:37:14,009 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 10:37:14,209 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:37:14,210 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr51REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr30REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr49REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr69ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr45REQUIRES_VIOLATION, mainErr68REQUIRES_VIOLATION, mainErr47REQUIRES_VIOLATION, mainErr66REQUIRES_VIOLATION, mainErr43REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr40REQUIRES_VIOLATION, mainErr61REQUIRES_VIOLATION, mainErr72ENSURES_VIOLATIONMEMORY_LEAK, mainErr17REQUIRES_VIOLATION, mainErr38REQUIRES_VIOLATION, mainErr59REQUIRES_VIOLATION, mainErr57REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr34REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr36REQUIRES_VIOLATION, mainErr32REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr53REQUIRES_VIOLATION, mainErr55REQUIRES_VIOLATION, mainErr64ASSERT_VIOLATIONMEMORY_FREE, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr50REQUIRES_VIOLATION, mainErr31REQUIRES_VIOLATION, mainErr52REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr48REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr46REQUIRES_VIOLATION, mainErr67REQUIRES_VIOLATION, mainErr65REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr42REQUIRES_VIOLATION, mainErr63ASSERT_VIOLATIONMEMORY_FREE, mainErr23REQUIRES_VIOLATION, mainErr44REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr41REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr71ASSERT_VIOLATIONMEMORY_FREE, mainErr37REQUIRES_VIOLATION, mainErr60REQUIRES_VIOLATION, mainErr39REQUIRES_VIOLATION, mainErr58REQUIRES_VIOLATION, mainErr35REQUIRES_VIOLATION, mainErr62ASSERT_VIOLATIONMEMORY_FREE, mainErr14REQUIRES_VIOLATION, mainErr56REQUIRES_VIOLATION, mainErr70ASSERT_VIOLATIONMEMORY_FREE, mainErr10REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr33REQUIRES_VIOLATION, mainErr54REQUIRES_VIOLATION]=== [2019-11-20 10:37:14,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:37:14,210 INFO L82 PathProgramCache]: Analyzing trace with hash 133927700, now seen corresponding path program 1 times [2019-11-20 10:37:14,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 10:37:14,210 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [833966828] [2019-11-20 10:37:14,210 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c02b6c03-0488-486f-8d7e-c7e4405a9092/bin/uautomizer/cvc4 Starting monitored process 13 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:37:14,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:37:14,342 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-20 10:37:14,344 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:37:14,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:37:14,360 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 10:37:14,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:37:14,366 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [833966828] [2019-11-20 10:37:14,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 10:37:14,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2019-11-20 10:37:14,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871175278] [2019-11-20 10:37:14,367 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 10:37:14,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 10:37:14,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 10:37:14,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 10:37:14,368 INFO L87 Difference]: Start difference. First operand 174 states and 200 transitions. Second operand 3 states. [2019-11-20 10:37:14,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:37:14,528 INFO L93 Difference]: Finished difference Result 187 states and 213 transitions. [2019-11-20 10:37:14,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 10:37:14,528 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2019-11-20 10:37:14,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:37:14,529 INFO L225 Difference]: With dead ends: 187 [2019-11-20 10:37:14,529 INFO L226 Difference]: Without dead ends: 187 [2019-11-20 10:37:14,530 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 10:37:14,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2019-11-20 10:37:14,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 174. [2019-11-20 10:37:14,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2019-11-20 10:37:14,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 199 transitions. [2019-11-20 10:37:14,535 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 199 transitions. Word has length 28 [2019-11-20 10:37:14,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:37:14,536 INFO L462 AbstractCegarLoop]: Abstraction has 174 states and 199 transitions. [2019-11-20 10:37:14,536 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 10:37:14,536 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 199 transitions. [2019-11-20 10:37:14,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-20 10:37:14,537 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:37:14,537 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 10:37:14,741 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:37:14,742 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr51REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr30REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr49REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr69ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr45REQUIRES_VIOLATION, mainErr68REQUIRES_VIOLATION, mainErr47REQUIRES_VIOLATION, mainErr66REQUIRES_VIOLATION, mainErr43REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr40REQUIRES_VIOLATION, mainErr61REQUIRES_VIOLATION, mainErr72ENSURES_VIOLATIONMEMORY_LEAK, mainErr17REQUIRES_VIOLATION, mainErr38REQUIRES_VIOLATION, mainErr59REQUIRES_VIOLATION, mainErr57REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr34REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr36REQUIRES_VIOLATION, mainErr32REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr53REQUIRES_VIOLATION, mainErr55REQUIRES_VIOLATION, mainErr64ASSERT_VIOLATIONMEMORY_FREE, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr50REQUIRES_VIOLATION, mainErr31REQUIRES_VIOLATION, mainErr52REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr48REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr46REQUIRES_VIOLATION, mainErr67REQUIRES_VIOLATION, mainErr65REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr42REQUIRES_VIOLATION, mainErr63ASSERT_VIOLATIONMEMORY_FREE, mainErr23REQUIRES_VIOLATION, mainErr44REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr41REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr71ASSERT_VIOLATIONMEMORY_FREE, mainErr37REQUIRES_VIOLATION, mainErr60REQUIRES_VIOLATION, mainErr39REQUIRES_VIOLATION, mainErr58REQUIRES_VIOLATION, mainErr35REQUIRES_VIOLATION, mainErr62ASSERT_VIOLATIONMEMORY_FREE, mainErr14REQUIRES_VIOLATION, mainErr56REQUIRES_VIOLATION, mainErr70ASSERT_VIOLATIONMEMORY_FREE, mainErr10REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr33REQUIRES_VIOLATION, mainErr54REQUIRES_VIOLATION]=== [2019-11-20 10:37:14,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:37:14,742 INFO L82 PathProgramCache]: Analyzing trace with hash 748397341, now seen corresponding path program 1 times [2019-11-20 10:37:14,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 10:37:14,743 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [769102788] [2019-11-20 10:37:14,743 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c02b6c03-0488-486f-8d7e-c7e4405a9092/bin/uautomizer/cvc4 Starting monitored process 14 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:37:14,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:37:14,985 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-20 10:37:14,986 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:37:15,002 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-20 10:37:15,003 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:37:15,006 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:15,006 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:37:15,006 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 10:37:15,056 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:15,057 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 39 [2019-11-20 10:37:15,057 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:37:15,077 INFO L567 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2019-11-20 10:37:15,077 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:37:15,078 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:15 [2019-11-20 10:37:15,102 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-20 10:37:15,102 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:37:15,124 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:15,125 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:37:15,125 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:27 [2019-11-20 10:37:15,203 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:15,204 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 59 [2019-11-20 10:37:15,204 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 10:37:15,205 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:37:15,219 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:15,220 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 10:37:15,220 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:40 [2019-11-20 10:37:15,299 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:15,299 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 35 [2019-11-20 10:37:15,300 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:37:15,311 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:15,312 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 10:37:15,312 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:47, output treesize:19 [2019-11-20 10:37:15,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:37:15,374 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 10:37:15,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:37:15,503 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [769102788] [2019-11-20 10:37:15,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 10:37:15,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 6] imperfect sequences [] total 13 [2019-11-20 10:37:15,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165186500] [2019-11-20 10:37:15,504 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-20 10:37:15,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 10:37:15,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-20 10:37:15,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2019-11-20 10:37:15,505 INFO L87 Difference]: Start difference. First operand 174 states and 199 transitions. Second operand 14 states. [2019-11-20 10:37:17,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:37:17,141 INFO L93 Difference]: Finished difference Result 262 states and 293 transitions. [2019-11-20 10:37:17,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-20 10:37:17,142 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 28 [2019-11-20 10:37:17,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:37:17,144 INFO L225 Difference]: With dead ends: 262 [2019-11-20 10:37:17,144 INFO L226 Difference]: Without dead ends: 262 [2019-11-20 10:37:17,144 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=169, Invalid=383, Unknown=0, NotChecked=0, Total=552 [2019-11-20 10:37:17,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2019-11-20 10:37:17,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 173. [2019-11-20 10:37:17,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2019-11-20 10:37:17,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 198 transitions. [2019-11-20 10:37:17,151 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 198 transitions. Word has length 28 [2019-11-20 10:37:17,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:37:17,152 INFO L462 AbstractCegarLoop]: Abstraction has 173 states and 198 transitions. [2019-11-20 10:37:17,152 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-20 10:37:17,152 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 198 transitions. [2019-11-20 10:37:17,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-20 10:37:17,153 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:37:17,153 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 10:37:17,356 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:37:17,357 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr51REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr30REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr49REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr69ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr45REQUIRES_VIOLATION, mainErr68REQUIRES_VIOLATION, mainErr47REQUIRES_VIOLATION, mainErr66REQUIRES_VIOLATION, mainErr43REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr40REQUIRES_VIOLATION, mainErr61REQUIRES_VIOLATION, mainErr72ENSURES_VIOLATIONMEMORY_LEAK, mainErr17REQUIRES_VIOLATION, mainErr38REQUIRES_VIOLATION, mainErr59REQUIRES_VIOLATION, mainErr57REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr34REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr36REQUIRES_VIOLATION, mainErr32REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr53REQUIRES_VIOLATION, mainErr55REQUIRES_VIOLATION, mainErr64ASSERT_VIOLATIONMEMORY_FREE, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr50REQUIRES_VIOLATION, mainErr31REQUIRES_VIOLATION, mainErr52REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr48REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr46REQUIRES_VIOLATION, mainErr67REQUIRES_VIOLATION, mainErr65REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr42REQUIRES_VIOLATION, mainErr63ASSERT_VIOLATIONMEMORY_FREE, mainErr23REQUIRES_VIOLATION, mainErr44REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr41REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr71ASSERT_VIOLATIONMEMORY_FREE, mainErr37REQUIRES_VIOLATION, mainErr60REQUIRES_VIOLATION, mainErr39REQUIRES_VIOLATION, mainErr58REQUIRES_VIOLATION, mainErr35REQUIRES_VIOLATION, mainErr62ASSERT_VIOLATIONMEMORY_FREE, mainErr14REQUIRES_VIOLATION, mainErr56REQUIRES_VIOLATION, mainErr70ASSERT_VIOLATIONMEMORY_FREE, mainErr10REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr33REQUIRES_VIOLATION, mainErr54REQUIRES_VIOLATION]=== [2019-11-20 10:37:17,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:37:17,357 INFO L82 PathProgramCache]: Analyzing trace with hash 748397342, now seen corresponding path program 1 times [2019-11-20 10:37:17,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 10:37:17,357 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [737163878] [2019-11-20 10:37:17,357 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c02b6c03-0488-486f-8d7e-c7e4405a9092/bin/uautomizer/cvc4 Starting monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:37:17,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:37:17,638 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-20 10:37:17,639 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:37:17,646 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-20 10:37:17,647 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:37:17,649 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:17,649 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:37:17,649 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 10:37:17,660 INFO L392 ElimStorePlain]: Different costs {0=[|v_#length_97|], 1=[|v_#valid_156|]} [2019-11-20 10:37:17,663 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-20 10:37:17,663 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:37:17,674 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:17,681 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:17,682 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2019-11-20 10:37:17,682 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 10:37:17,689 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:17,690 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:37:17,690 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2019-11-20 10:37:17,709 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-20 10:37:17,710 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:37:17,726 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:17,729 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-20 10:37:17,730 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 10:37:17,742 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:17,742 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:37:17,742 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:27 [2019-11-20 10:37:17,792 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2019-11-20 10:37:17,792 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:37:17,813 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:17,845 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:17,845 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 68 [2019-11-20 10:37:17,845 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 10:37:17,846 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 10:37:17,883 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:17,884 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 10:37:17,884 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:51 [2019-11-20 10:37:17,966 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:17,966 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 42 [2019-11-20 10:37:17,967 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:37:17,996 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:18,002 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2019-11-20 10:37:18,003 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 10:37:18,017 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:18,017 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:37:18,017 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:65, output treesize:9 [2019-11-20 10:37:18,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:37:18,086 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 10:37:22,288 WARN L191 SmtUtils]: Spent 1.54 s on a formula simplification that was a NOOP. DAG size: 42 [2019-11-20 10:37:26,979 WARN L191 SmtUtils]: Spent 1.38 s on a formula simplification that was a NOOP. DAG size: 43 [2019-11-20 10:37:27,010 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:37:27,271 WARN L191 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2019-11-20 10:37:27,272 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:27,288 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 10:37:27,578 WARN L191 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2019-11-20 10:37:27,579 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:27,585 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-11-20 10:37:28,498 WARN L191 SmtUtils]: Spent 912.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2019-11-20 10:37:28,498 INFO L567 ElimStorePlain]: treesize reduction 59, result has 62.4 percent of original size [2019-11-20 10:37:28,505 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-11-20 10:37:28,694 WARN L191 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2019-11-20 10:37:28,694 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:28,695 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 10:37:28,698 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 10:37:28,704 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 10:37:28,704 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 10:37:28,705 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 10:37:28,706 INFO L496 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 4 dim-2 vars, End of recursive call: 2 dim-0 vars, and 7 xjuncts. [2019-11-20 10:37:28,706 INFO L221 ElimStorePlain]: Needed 5 recursive calls to eliminate 10 variables, input treesize:166, output treesize:63 [2019-11-20 10:37:28,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:37:28,893 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [737163878] [2019-11-20 10:37:28,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 10:37:28,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 15 [2019-11-20 10:37:28,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340725282] [2019-11-20 10:37:28,893 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-20 10:37:28,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 10:37:28,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-20 10:37:28,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2019-11-20 10:37:28,894 INFO L87 Difference]: Start difference. First operand 173 states and 198 transitions. Second operand 16 states. [2019-11-20 10:37:31,344 WARN L191 SmtUtils]: Spent 674.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 41 [2019-11-20 10:37:31,667 WARN L191 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2019-11-20 10:37:33,683 WARN L191 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 81 DAG size of output: 49 [2019-11-20 10:37:35,592 WARN L191 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 86 DAG size of output: 54 [2019-11-20 10:37:37,237 WARN L191 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 39 [2019-11-20 10:37:37,550 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2019-11-20 10:37:38,204 WARN L191 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 49 [2019-11-20 10:37:38,953 WARN L191 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 54 [2019-11-20 10:37:39,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:37:39,237 INFO L93 Difference]: Finished difference Result 182 states and 207 transitions. [2019-11-20 10:37:39,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-20 10:37:39,238 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 28 [2019-11-20 10:37:39,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:37:39,240 INFO L225 Difference]: With dead ends: 182 [2019-11-20 10:37:39,240 INFO L226 Difference]: Without dead ends: 182 [2019-11-20 10:37:39,241 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=305, Invalid=751, Unknown=0, NotChecked=0, Total=1056 [2019-11-20 10:37:39,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2019-11-20 10:37:39,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 166. [2019-11-20 10:37:39,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2019-11-20 10:37:39,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 191 transitions. [2019-11-20 10:37:39,246 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 191 transitions. Word has length 28 [2019-11-20 10:37:39,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:37:39,247 INFO L462 AbstractCegarLoop]: Abstraction has 166 states and 191 transitions. [2019-11-20 10:37:39,247 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-20 10:37:39,247 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 191 transitions. [2019-11-20 10:37:39,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-20 10:37:39,251 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:37:39,251 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 10:37:39,454 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:37:39,455 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr51REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr30REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr49REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr69ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr45REQUIRES_VIOLATION, mainErr68REQUIRES_VIOLATION, mainErr47REQUIRES_VIOLATION, mainErr66REQUIRES_VIOLATION, mainErr43REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr40REQUIRES_VIOLATION, mainErr61REQUIRES_VIOLATION, mainErr72ENSURES_VIOLATIONMEMORY_LEAK, mainErr17REQUIRES_VIOLATION, mainErr38REQUIRES_VIOLATION, mainErr59REQUIRES_VIOLATION, mainErr57REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr34REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr36REQUIRES_VIOLATION, mainErr32REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr53REQUIRES_VIOLATION, mainErr55REQUIRES_VIOLATION, mainErr64ASSERT_VIOLATIONMEMORY_FREE, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr50REQUIRES_VIOLATION, mainErr31REQUIRES_VIOLATION, mainErr52REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr48REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr46REQUIRES_VIOLATION, mainErr67REQUIRES_VIOLATION, mainErr65REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr42REQUIRES_VIOLATION, mainErr63ASSERT_VIOLATIONMEMORY_FREE, mainErr23REQUIRES_VIOLATION, mainErr44REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr41REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr71ASSERT_VIOLATIONMEMORY_FREE, mainErr37REQUIRES_VIOLATION, mainErr60REQUIRES_VIOLATION, mainErr39REQUIRES_VIOLATION, mainErr58REQUIRES_VIOLATION, mainErr35REQUIRES_VIOLATION, mainErr62ASSERT_VIOLATIONMEMORY_FREE, mainErr14REQUIRES_VIOLATION, mainErr56REQUIRES_VIOLATION, mainErr70ASSERT_VIOLATIONMEMORY_FREE, mainErr10REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr33REQUIRES_VIOLATION, mainErr54REQUIRES_VIOLATION]=== [2019-11-20 10:37:39,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:37:39,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1292402749, now seen corresponding path program 1 times [2019-11-20 10:37:39,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 10:37:39,456 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1713778934] [2019-11-20 10:37:39,456 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c02b6c03-0488-486f-8d7e-c7e4405a9092/bin/uautomizer/cvc4 Starting monitored process 16 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:37:39,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:37:39,637 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-20 10:37:39,639 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:37:39,650 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2019-11-20 10:37:39,650 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:37:39,661 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:39,664 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2019-11-20 10:37:39,664 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 10:37:39,673 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:39,673 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:37:39,673 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:30, output treesize:22 [2019-11-20 10:37:39,706 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2019-11-20 10:37:39,707 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:37:39,716 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:39,718 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2019-11-20 10:37:39,718 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 10:37:39,723 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:39,723 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:37:39,723 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:7 [2019-11-20 10:37:39,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:37:39,752 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 10:37:39,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:37:39,813 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1713778934] [2019-11-20 10:37:39,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 10:37:39,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 9 [2019-11-20 10:37:39,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874838340] [2019-11-20 10:37:39,814 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-20 10:37:39,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 10:37:39,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-20 10:37:39,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-11-20 10:37:39,814 INFO L87 Difference]: Start difference. First operand 166 states and 191 transitions. Second operand 9 states. [2019-11-20 10:37:40,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:37:40,763 INFO L93 Difference]: Finished difference Result 268 states and 294 transitions. [2019-11-20 10:37:40,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-20 10:37:40,763 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2019-11-20 10:37:40,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:37:40,765 INFO L225 Difference]: With dead ends: 268 [2019-11-20 10:37:40,765 INFO L226 Difference]: Without dead ends: 268 [2019-11-20 10:37:40,765 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-11-20 10:37:40,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2019-11-20 10:37:40,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 179. [2019-11-20 10:37:40,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2019-11-20 10:37:40,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 205 transitions. [2019-11-20 10:37:40,772 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 205 transitions. Word has length 32 [2019-11-20 10:37:40,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:37:40,772 INFO L462 AbstractCegarLoop]: Abstraction has 179 states and 205 transitions. [2019-11-20 10:37:40,772 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-20 10:37:40,773 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 205 transitions. [2019-11-20 10:37:40,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-20 10:37:40,774 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:37:40,774 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 10:37:40,974 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:37:40,975 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr51REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr30REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr49REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr69ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr45REQUIRES_VIOLATION, mainErr68REQUIRES_VIOLATION, mainErr47REQUIRES_VIOLATION, mainErr66REQUIRES_VIOLATION, mainErr43REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr40REQUIRES_VIOLATION, mainErr61REQUIRES_VIOLATION, mainErr72ENSURES_VIOLATIONMEMORY_LEAK, mainErr17REQUIRES_VIOLATION, mainErr38REQUIRES_VIOLATION, mainErr59REQUIRES_VIOLATION, mainErr57REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr34REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr36REQUIRES_VIOLATION, mainErr32REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr53REQUIRES_VIOLATION, mainErr55REQUIRES_VIOLATION, mainErr64ASSERT_VIOLATIONMEMORY_FREE, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr50REQUIRES_VIOLATION, mainErr31REQUIRES_VIOLATION, mainErr52REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr48REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr46REQUIRES_VIOLATION, mainErr67REQUIRES_VIOLATION, mainErr65REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr42REQUIRES_VIOLATION, mainErr63ASSERT_VIOLATIONMEMORY_FREE, mainErr23REQUIRES_VIOLATION, mainErr44REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr41REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr71ASSERT_VIOLATIONMEMORY_FREE, mainErr37REQUIRES_VIOLATION, mainErr60REQUIRES_VIOLATION, mainErr39REQUIRES_VIOLATION, mainErr58REQUIRES_VIOLATION, mainErr35REQUIRES_VIOLATION, mainErr62ASSERT_VIOLATIONMEMORY_FREE, mainErr14REQUIRES_VIOLATION, mainErr56REQUIRES_VIOLATION, mainErr70ASSERT_VIOLATIONMEMORY_FREE, mainErr10REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr33REQUIRES_VIOLATION, mainErr54REQUIRES_VIOLATION]=== [2019-11-20 10:37:40,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:37:40,975 INFO L82 PathProgramCache]: Analyzing trace with hash -522520424, now seen corresponding path program 1 times [2019-11-20 10:37:40,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 10:37:40,975 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1720038307] [2019-11-20 10:37:40,976 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c02b6c03-0488-486f-8d7e-c7e4405a9092/bin/uautomizer/cvc4 Starting monitored process 17 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:37:41,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:37:41,203 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-20 10:37:41,205 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:37:41,214 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2019-11-20 10:37:41,214 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:37:41,224 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:41,227 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2019-11-20 10:37:41,228 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 10:37:41,235 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:41,235 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:37:41,235 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2019-11-20 10:37:41,252 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 10:37:41,253 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2019-11-20 10:37:41,253 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:37:41,270 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:41,274 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 10:37:41,275 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2019-11-20 10:37:41,275 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 10:37:41,289 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:41,289 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:37:41,290 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:44, output treesize:36 [2019-11-20 10:37:41,319 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 10:37:41,321 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 10:37:41,322 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 10:37:41,331 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2019-11-20 10:37:41,332 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:37:41,367 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:41,371 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 10:37:41,372 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 10:37:41,373 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 10:37:41,374 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2019-11-20 10:37:41,375 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 10:37:41,395 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:41,395 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:37:41,395 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:62, output treesize:54 [2019-11-20 10:37:41,486 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2019-11-20 10:37:41,486 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:37:41,498 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:41,501 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:41,502 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 13 [2019-11-20 10:37:41,502 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 10:37:41,507 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:41,507 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:37:41,507 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:7 [2019-11-20 10:37:41,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:37:41,547 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 10:37:41,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:37:41,633 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1720038307] [2019-11-20 10:37:41,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 10:37:41,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 11 [2019-11-20 10:37:41,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643368773] [2019-11-20 10:37:41,634 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-20 10:37:41,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 10:37:41,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-20 10:37:41,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-11-20 10:37:41,634 INFO L87 Difference]: Start difference. First operand 179 states and 205 transitions. Second operand 11 states. [2019-11-20 10:37:43,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:37:43,002 INFO L93 Difference]: Finished difference Result 294 states and 318 transitions. [2019-11-20 10:37:43,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-20 10:37:43,004 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2019-11-20 10:37:43,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:37:43,006 INFO L225 Difference]: With dead ends: 294 [2019-11-20 10:37:43,006 INFO L226 Difference]: Without dead ends: 294 [2019-11-20 10:37:43,006 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2019-11-20 10:37:43,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2019-11-20 10:37:43,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 203. [2019-11-20 10:37:43,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2019-11-20 10:37:43,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 238 transitions. [2019-11-20 10:37:43,013 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 238 transitions. Word has length 34 [2019-11-20 10:37:43,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:37:43,014 INFO L462 AbstractCegarLoop]: Abstraction has 203 states and 238 transitions. [2019-11-20 10:37:43,014 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-20 10:37:43,014 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 238 transitions. [2019-11-20 10:37:43,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-20 10:37:43,015 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:37:43,015 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 10:37:43,218 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:37:43,219 INFO L410 AbstractCegarLoop]: === Iteration 17 === [mainErr51REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr30REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr49REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr69ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr45REQUIRES_VIOLATION, mainErr68REQUIRES_VIOLATION, mainErr47REQUIRES_VIOLATION, mainErr66REQUIRES_VIOLATION, mainErr43REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr40REQUIRES_VIOLATION, mainErr61REQUIRES_VIOLATION, mainErr72ENSURES_VIOLATIONMEMORY_LEAK, mainErr17REQUIRES_VIOLATION, mainErr38REQUIRES_VIOLATION, mainErr59REQUIRES_VIOLATION, mainErr57REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr34REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr36REQUIRES_VIOLATION, mainErr32REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr53REQUIRES_VIOLATION, mainErr55REQUIRES_VIOLATION, mainErr64ASSERT_VIOLATIONMEMORY_FREE, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr50REQUIRES_VIOLATION, mainErr31REQUIRES_VIOLATION, mainErr52REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr48REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr46REQUIRES_VIOLATION, mainErr67REQUIRES_VIOLATION, mainErr65REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr42REQUIRES_VIOLATION, mainErr63ASSERT_VIOLATIONMEMORY_FREE, mainErr23REQUIRES_VIOLATION, mainErr44REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr41REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr71ASSERT_VIOLATIONMEMORY_FREE, mainErr37REQUIRES_VIOLATION, mainErr60REQUIRES_VIOLATION, mainErr39REQUIRES_VIOLATION, mainErr58REQUIRES_VIOLATION, mainErr35REQUIRES_VIOLATION, mainErr62ASSERT_VIOLATIONMEMORY_FREE, mainErr14REQUIRES_VIOLATION, mainErr56REQUIRES_VIOLATION, mainErr70ASSERT_VIOLATIONMEMORY_FREE, mainErr10REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr33REQUIRES_VIOLATION, mainErr54REQUIRES_VIOLATION]=== [2019-11-20 10:37:43,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:37:43,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1862611249, now seen corresponding path program 1 times [2019-11-20 10:37:43,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 10:37:43,219 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1071118688] [2019-11-20 10:37:43,220 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c02b6c03-0488-486f-8d7e-c7e4405a9092/bin/uautomizer/cvc4 Starting monitored process 18 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:37:43,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:37:43,464 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-20 10:37:43,465 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:37:43,469 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-20 10:37:43,470 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:37:43,474 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:43,475 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:37:43,475 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-20 10:37:43,503 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:43,503 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 41 [2019-11-20 10:37:43,504 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:37:43,528 INFO L567 ElimStorePlain]: treesize reduction 14, result has 56.3 percent of original size [2019-11-20 10:37:43,529 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:37:43,529 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2019-11-20 10:37:43,546 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-11-20 10:37:43,547 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:37:43,560 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:43,561 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:37:43,561 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:32 [2019-11-20 10:37:43,654 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:43,654 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 59 [2019-11-20 10:37:43,655 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 10:37:43,656 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 10:37:43,656 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2019-11-20 10:37:43,699 INFO L567 ElimStorePlain]: treesize reduction 86, result has 34.8 percent of original size [2019-11-20 10:37:43,700 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 10:37:43,700 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:45 [2019-11-20 10:37:43,873 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:43,874 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 109 [2019-11-20 10:37:43,875 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 10:37:43,876 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:37:47,984 WARN L191 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 39 DAG size of output: 28 [2019-11-20 10:37:47,985 INFO L567 ElimStorePlain]: treesize reduction 80, result has 42.9 percent of original size [2019-11-20 10:37:47,985 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-20 10:37:47,985 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:70, output treesize:60 [2019-11-20 10:37:54,055 WARN L191 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2019-11-20 10:37:54,118 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:54,118 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 35 [2019-11-20 10:37:54,119 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:37:54,135 INFO L567 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2019-11-20 10:37:54,135 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 10:37:54,136 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:15 [2019-11-20 10:37:54,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:37:54,207 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 10:37:54,820 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:37:54,852 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:37:54,852 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 10:37:54,853 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2019-11-20 10:37:54,853 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:20 [2019-11-20 10:37:54,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:37:54,960 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1071118688] [2019-11-20 10:37:54,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 10:37:54,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 10] imperfect sequences [] total 20 [2019-11-20 10:37:54,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353944921] [2019-11-20 10:37:54,962 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-20 10:37:54,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 10:37:54,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-20 10:37:54,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=340, Unknown=2, NotChecked=0, Total=420 [2019-11-20 10:37:54,963 INFO L87 Difference]: Start difference. First operand 203 states and 238 transitions. Second operand 21 states. [2019-11-20 10:38:11,771 WARN L191 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2019-11-20 10:38:22,894 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2019-11-20 10:38:23,115 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2019-11-20 10:38:27,773 WARN L191 SmtUtils]: Spent 4.50 s on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2019-11-20 10:38:28,558 WARN L191 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2019-11-20 10:38:30,477 WARN L191 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2019-11-20 10:38:31,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:38:31,215 INFO L93 Difference]: Finished difference Result 408 states and 446 transitions. [2019-11-20 10:38:31,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-20 10:38:31,216 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 36 [2019-11-20 10:38:31,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:38:31,220 INFO L225 Difference]: With dead ends: 408 [2019-11-20 10:38:31,220 INFO L226 Difference]: Without dead ends: 408 [2019-11-20 10:38:31,221 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 29.4s TimeCoverageRelationStatistics Valid=353, Invalid=1120, Unknown=9, NotChecked=0, Total=1482 [2019-11-20 10:38:31,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2019-11-20 10:38:31,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 206. [2019-11-20 10:38:31,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2019-11-20 10:38:31,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 240 transitions. [2019-11-20 10:38:31,230 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 240 transitions. Word has length 36 [2019-11-20 10:38:31,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:38:31,231 INFO L462 AbstractCegarLoop]: Abstraction has 206 states and 240 transitions. [2019-11-20 10:38:31,231 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-20 10:38:31,231 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 240 transitions. [2019-11-20 10:38:31,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-20 10:38:31,232 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:38:31,232 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 10:38:31,436 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:38:31,436 INFO L410 AbstractCegarLoop]: === Iteration 18 === [mainErr51REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr30REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr49REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr69ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr45REQUIRES_VIOLATION, mainErr68REQUIRES_VIOLATION, mainErr47REQUIRES_VIOLATION, mainErr66REQUIRES_VIOLATION, mainErr43REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr40REQUIRES_VIOLATION, mainErr61REQUIRES_VIOLATION, mainErr72ENSURES_VIOLATIONMEMORY_LEAK, mainErr17REQUIRES_VIOLATION, mainErr38REQUIRES_VIOLATION, mainErr59REQUIRES_VIOLATION, mainErr57REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr34REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr36REQUIRES_VIOLATION, mainErr32REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr53REQUIRES_VIOLATION, mainErr55REQUIRES_VIOLATION, mainErr64ASSERT_VIOLATIONMEMORY_FREE, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr50REQUIRES_VIOLATION, mainErr31REQUIRES_VIOLATION, mainErr52REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr48REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr46REQUIRES_VIOLATION, mainErr67REQUIRES_VIOLATION, mainErr65REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr42REQUIRES_VIOLATION, mainErr63ASSERT_VIOLATIONMEMORY_FREE, mainErr23REQUIRES_VIOLATION, mainErr44REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr41REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr71ASSERT_VIOLATIONMEMORY_FREE, mainErr37REQUIRES_VIOLATION, mainErr60REQUIRES_VIOLATION, mainErr39REQUIRES_VIOLATION, mainErr58REQUIRES_VIOLATION, mainErr35REQUIRES_VIOLATION, mainErr62ASSERT_VIOLATIONMEMORY_FREE, mainErr14REQUIRES_VIOLATION, mainErr56REQUIRES_VIOLATION, mainErr70ASSERT_VIOLATIONMEMORY_FREE, mainErr10REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr33REQUIRES_VIOLATION, mainErr54REQUIRES_VIOLATION]=== [2019-11-20 10:38:31,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:38:31,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1862611248, now seen corresponding path program 1 times [2019-11-20 10:38:31,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 10:38:31,437 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1405433429] [2019-11-20 10:38:31,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c02b6c03-0488-486f-8d7e-c7e4405a9092/bin/uautomizer/cvc4 Starting monitored process 19 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:38:31,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:38:31,695 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-20 10:38:31,696 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:38:31,705 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-20 10:38:31,705 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:38:31,710 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:38:31,711 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:38:31,711 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-20 10:38:31,719 INFO L392 ElimStorePlain]: Different costs {0=[|v_#length_101|], 1=[|v_#valid_175|]} [2019-11-20 10:38:31,722 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-20 10:38:31,723 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:38:31,735 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:38:31,743 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:38:31,743 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2019-11-20 10:38:31,744 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 10:38:31,753 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:38:31,754 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:38:31,754 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:25, output treesize:16 [2019-11-20 10:38:31,774 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-11-20 10:38:31,774 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:38:31,791 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:38:31,795 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-11-20 10:38:31,795 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 10:38:31,809 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:38:31,810 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:38:31,810 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:36 [2019-11-20 10:38:31,892 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:38:31,892 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 72 [2019-11-20 10:38:31,893 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 10:38:31,893 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:38:31,943 INFO L567 ElimStorePlain]: treesize reduction 26, result has 72.9 percent of original size [2019-11-20 10:38:31,951 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 26 [2019-11-20 10:38:31,951 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 10:38:31,970 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:38:31,970 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 10:38:31,971 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:60 [2019-11-20 10:38:32,093 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 10:38:32,156 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:38:32,156 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 137 [2019-11-20 10:38:32,157 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 10:38:32,158 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 10:38:32,158 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 10:38:32,159 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 10:38:32,160 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 10:38:32,161 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 10:38:32,162 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 10:38:32,162 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 10:38:32,163 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 10:38:32,164 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 10:38:32,167 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 5 xjuncts. [2019-11-20 10:38:32,400 WARN L191 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 36 [2019-11-20 10:38:32,400 INFO L567 ElimStorePlain]: treesize reduction 1062, result has 9.8 percent of original size [2019-11-20 10:38:32,426 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:38:32,426 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 120 [2019-11-20 10:38:32,427 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 10:38:32,497 INFO L567 ElimStorePlain]: treesize reduction 38, result has 73.2 percent of original size [2019-11-20 10:38:32,497 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 10:38:32,497 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:122, output treesize:104 [2019-11-20 10:38:32,915 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2019-11-20 10:38:33,109 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 10:38:33,115 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:38:33,116 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 40 [2019-11-20 10:38:33,116 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:38:33,152 INFO L567 ElimStorePlain]: treesize reduction 4, result has 91.5 percent of original size [2019-11-20 10:38:33,155 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 15 [2019-11-20 10:38:33,155 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 10:38:33,165 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:38:33,165 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:38:33,166 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:15 [2019-11-20 10:38:33,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:38:33,257 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 10:38:33,682 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 10:38:34,817 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 10:38:34,817 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 10:38:34,818 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 10:38:34,819 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 10:38:43,811 WARN L191 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2019-11-20 10:38:47,141 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 10:38:47,142 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 10:38:47,143 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 10:38:47,164 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:38:47,180 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 10:38:47,182 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 10:38:47,183 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-11-20 10:38:47,186 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 10:38:47,187 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-11-20 10:38:47,547 WARN L191 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2019-11-20 10:38:47,547 INFO L567 ElimStorePlain]: treesize reduction 330, result has 46.8 percent of original size [2019-11-20 10:38:47,748 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:38:47,749 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: no XNF at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimOneRec(ElimStorePlain.java:244) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.eliminateOne(ElimStorePlain.java:553) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:466) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:216) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:306) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:102) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:246) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:440) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:419) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:291) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:334) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:177) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:242) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:166) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:463) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:333) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:123) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-11-20 10:38:47,752 INFO L168 Benchmark]: Toolchain (without parser) took 123024.11 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 228.6 MB). Free memory was 939.3 MB in the beginning and 893.7 MB in the end (delta: 45.7 MB). Peak memory consumption was 274.2 MB. Max. memory is 11.5 GB. [2019-11-20 10:38:47,753 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 10:38:47,753 INFO L168 Benchmark]: CACSL2BoogieTranslator took 651.53 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 119.5 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -162.8 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. [2019-11-20 10:38:47,754 INFO L168 Benchmark]: Boogie Preprocessor took 96.92 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-11-20 10:38:47,754 INFO L168 Benchmark]: RCFGBuilder took 1397.40 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 76.2 MB). Peak memory consumption was 76.2 MB. Max. memory is 11.5 GB. [2019-11-20 10:38:47,754 INFO L168 Benchmark]: TraceAbstraction took 120874.13 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 109.1 MB). Free memory was 1.0 GB in the beginning and 893.7 MB in the end (delta: 126.9 MB). Peak memory consumption was 236.0 MB. Max. memory is 11.5 GB. [2019-11-20 10:38:47,756 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 651.53 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 119.5 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -162.8 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 96.92 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 1397.40 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 76.2 MB). Peak memory consumption was 76.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 120874.13 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 109.1 MB). Free memory was 1.0 GB in the beginning and 893.7 MB in the end (delta: 126.9 MB). Peak memory consumption was 236.0 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: no XNF de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: no XNF: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimOneRec(ElimStorePlain.java:244) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...