./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/verifythis/prefixsum_rec.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 678e0110 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_d4bea82b-3bcb-4b9e-bef5-1c22022b70f5/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_d4bea82b-3bcb-4b9e-bef5-1c22022b70f5/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_d4bea82b-3bcb-4b9e-bef5-1c22022b70f5/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_d4bea82b-3bcb-4b9e-bef5-1c22022b70f5/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/verifythis/prefixsum_rec.c -s /tmp/vcloud-vcloud-master/worker/run_dir_d4bea82b-3bcb-4b9e-bef5-1c22022b70f5/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_d4bea82b-3bcb-4b9e-bef5-1c22022b70f5/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dfe4f59e301667046d3ef10ba60878cba2d98817 .......................................................................................................................................................................................................................................................................................... Execution finished normally 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_d4bea82b-3bcb-4b9e-bef5-1c22022b70f5/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_d4bea82b-3bcb-4b9e-bef5-1c22022b70f5/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_d4bea82b-3bcb-4b9e-bef5-1c22022b70f5/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_d4bea82b-3bcb-4b9e-bef5-1c22022b70f5/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/verifythis/prefixsum_rec.c -s /tmp/vcloud-vcloud-master/worker/run_dir_d4bea82b-3bcb-4b9e-bef5-1c22022b70f5/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_d4bea82b-3bcb-4b9e-bef5-1c22022b70f5/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dfe4f59e301667046d3ef10ba60878cba2d98817 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: AssertionError: Alternating quantifiers not yet supported --- Real Ultimate output --- This is Ultimate 0.1.24-678e011 [2019-11-20 03:19:56,952 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 03:19:56,954 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 03:19:56,964 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 03:19:56,965 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 03:19:56,965 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 03:19:56,967 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 03:19:56,969 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 03:19:56,971 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 03:19:56,971 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 03:19:56,972 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 03:19:56,974 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 03:19:56,974 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 03:19:56,975 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 03:19:56,976 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 03:19:56,977 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 03:19:56,981 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 03:19:56,982 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 03:19:56,984 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 03:19:56,986 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 03:19:56,988 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 03:19:56,989 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 03:19:56,990 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 03:19:56,991 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 03:19:56,995 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 03:19:56,996 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 03:19:57,000 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 03:19:57,001 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 03:19:57,002 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 03:19:57,003 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 03:19:57,003 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 03:19:57,003 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 03:19:57,004 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 03:19:57,005 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 03:19:57,005 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 03:19:57,006 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 03:19:57,006 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 03:19:57,006 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 03:19:57,007 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 03:19:57,007 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 03:19:57,008 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 03:19:57,009 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_d4bea82b-3bcb-4b9e-bef5-1c22022b70f5/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-20 03:19:57,032 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 03:19:57,032 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 03:19:57,034 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 03:19:57,034 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 03:19:57,034 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 03:19:57,035 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 03:19:57,035 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 03:19:57,035 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 03:19:57,035 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 03:19:57,035 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 03:19:57,036 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-20 03:19:57,036 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 03:19:57,037 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-20 03:19:57,037 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 03:19:57,037 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 03:19:57,037 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 03:19:57,037 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-20 03:19:57,038 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 03:19:57,038 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 03:19:57,038 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 03:19:57,038 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 03:19:57,038 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 03:19:57,039 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 03:19:57,039 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 03:19:57,039 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-20 03:19:57,039 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-20 03:19:57,039 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-20 03:19:57,039 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-20 03:19:57,040 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_d4bea82b-3bcb-4b9e-bef5-1c22022b70f5/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 ! call(__VERIFIER_error())) ) 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 -> dfe4f59e301667046d3ef10ba60878cba2d98817 [2019-11-20 03:19:57,186 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 03:19:57,196 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 03:19:57,199 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 03:19:57,200 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 03:19:57,201 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 03:19:57,201 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_d4bea82b-3bcb-4b9e-bef5-1c22022b70f5/bin/uautomizer/../../sv-benchmarks/c/verifythis/prefixsum_rec.c [2019-11-20 03:19:57,249 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d4bea82b-3bcb-4b9e-bef5-1c22022b70f5/bin/uautomizer/data/d539c3d00/b90c6751c7ef416d9a7b53ff582b7282/FLAGa23a3d161 [2019-11-20 03:19:57,685 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 03:19:57,687 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_d4bea82b-3bcb-4b9e-bef5-1c22022b70f5/sv-benchmarks/c/verifythis/prefixsum_rec.c [2019-11-20 03:19:57,694 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d4bea82b-3bcb-4b9e-bef5-1c22022b70f5/bin/uautomizer/data/d539c3d00/b90c6751c7ef416d9a7b53ff582b7282/FLAGa23a3d161 [2019-11-20 03:19:57,710 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_d4bea82b-3bcb-4b9e-bef5-1c22022b70f5/bin/uautomizer/data/d539c3d00/b90c6751c7ef416d9a7b53ff582b7282 [2019-11-20 03:19:57,713 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 03:19:57,714 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 03:19:57,716 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 03:19:57,716 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 03:19:57,719 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 03:19:57,719 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 03:19:57" (1/1) ... [2019-11-20 03:19:57,722 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@268182aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:19:57, skipping insertion in model container [2019-11-20 03:19:57,722 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 03:19:57" (1/1) ... [2019-11-20 03:19:57,729 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 03:19:57,748 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 03:19:57,897 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 03:19:57,968 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 03:19:57,999 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 03:19:58,014 INFO L192 MainTranslator]: Completed translation [2019-11-20 03:19:58,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:19:58 WrapperNode [2019-11-20 03:19:58,015 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 03:19:58,016 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 03:19:58,016 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 03:19:58,016 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 03:19:58,022 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:19:58" (1/1) ... [2019-11-20 03:19:58,031 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:19:58" (1/1) ... [2019-11-20 03:19:58,056 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 03:19:58,058 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 03:19:58,058 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 03:19:58,058 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 03:19:58,067 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:19:58" (1/1) ... [2019-11-20 03:19:58,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:19:58" (1/1) ... [2019-11-20 03:19:58,078 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:19:58" (1/1) ... [2019-11-20 03:19:58,078 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:19:58" (1/1) ... [2019-11-20 03:19:58,087 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:19:58" (1/1) ... [2019-11-20 03:19:58,092 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:19:58" (1/1) ... [2019-11-20 03:19:58,097 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:19:58" (1/1) ... [2019-11-20 03:19:58,100 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 03:19:58,100 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 03:19:58,100 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 03:19:58,101 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 03:19:58,101 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:19:58" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d4bea82b-3bcb-4b9e-bef5-1c22022b70f5/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 03:19:58,155 INFO L130 BoogieDeclarations]: Found specification of procedure downsweep [2019-11-20 03:19:58,156 INFO L138 BoogieDeclarations]: Found implementation of procedure downsweep [2019-11-20 03:19:58,156 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-20 03:19:58,156 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-20 03:19:58,156 INFO L130 BoogieDeclarations]: Found specification of procedure upsweep [2019-11-20 03:19:58,156 INFO L138 BoogieDeclarations]: Found implementation of procedure upsweep [2019-11-20 03:19:58,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 03:19:58,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 03:19:58,157 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-20 03:19:58,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-20 03:19:58,503 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 03:19:58,503 INFO L285 CfgBuilder]: Removed 17 assume(true) statements. [2019-11-20 03:19:58,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 03:19:58 BoogieIcfgContainer [2019-11-20 03:19:58,504 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 03:19:58,505 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 03:19:58,505 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 03:19:58,508 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 03:19:58,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 03:19:57" (1/3) ... [2019-11-20 03:19:58,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23f1736e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 03:19:58, skipping insertion in model container [2019-11-20 03:19:58,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:19:58" (2/3) ... [2019-11-20 03:19:58,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23f1736e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 03:19:58, skipping insertion in model container [2019-11-20 03:19:58,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 03:19:58" (3/3) ... [2019-11-20 03:19:58,511 INFO L109 eAbstractionObserver]: Analyzing ICFG prefixsum_rec.c [2019-11-20 03:19:58,518 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 03:19:58,523 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-20 03:19:58,531 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-20 03:19:58,550 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 03:19:58,551 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-20 03:19:58,551 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 03:19:58,551 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 03:19:58,551 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 03:19:58,551 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 03:19:58,551 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 03:19:58,551 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 03:19:58,565 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2019-11-20 03:19:58,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-20 03:19:58,570 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:19:58,571 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 03:19:58,571 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:19:58,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:19:58,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1360829009, now seen corresponding path program 1 times [2019-11-20 03:19:58,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:19:58,581 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777719319] [2019-11-20 03:19:58,581 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:19:58,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:19:58,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:19:58,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:19:58,870 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 03:19:58,870 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777719319] [2019-11-20 03:19:58,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 03:19:58,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-20 03:19:58,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38179516] [2019-11-20 03:19:58,876 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 03:19:58,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:19:58,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 03:19:58,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-20 03:19:58,891 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 6 states. [2019-11-20 03:19:59,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:19:59,073 INFO L93 Difference]: Finished difference Result 81 states and 108 transitions. [2019-11-20 03:19:59,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 03:19:59,076 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2019-11-20 03:19:59,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:19:59,085 INFO L225 Difference]: With dead ends: 81 [2019-11-20 03:19:59,085 INFO L226 Difference]: Without dead ends: 35 [2019-11-20 03:19:59,089 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-20 03:19:59,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-20 03:19:59,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2019-11-20 03:19:59,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-20 03:19:59,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2019-11-20 03:19:59,127 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 24 [2019-11-20 03:19:59,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:19:59,128 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2019-11-20 03:19:59,128 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 03:19:59,128 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2019-11-20 03:19:59,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-20 03:19:59,130 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:19:59,131 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] [2019-11-20 03:19:59,131 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:19:59,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:19:59,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1965744595, now seen corresponding path program 1 times [2019-11-20 03:19:59,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:19:59,132 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666908635] [2019-11-20 03:19:59,132 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:19:59,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:19:59,401 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Undeclared function symbol (const Int) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.term(NoopScript.java:478) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.term(WrapperScript.java:250) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.term(WrapperScript.java:250) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.SmtUtils.termWithLocalSimplification(SmtUtils.java:1307) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.SmtUtils.termWithLocalSimplification(SmtUtils.java:1188) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.TermTransferrer.convertApplicationTerm(TermTransferrer.java:182) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$BuildApplicationTerm.walk(TermTransformer.java:339) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.computePredicates(NestedInterpolantsBuilder.java:573) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:171) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:300) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:202) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:107) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.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 03:19:59,405 INFO L168 Benchmark]: Toolchain (without parser) took 1690.73 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 187.2 MB). Free memory was 948.7 MB in the beginning and 1.1 GB in the end (delta: -141.9 MB). Peak memory consumption was 45.3 MB. Max. memory is 11.5 GB. [2019-11-20 03:19:59,406 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 03:19:59,407 INFO L168 Benchmark]: CACSL2BoogieTranslator took 299.65 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 187.2 MB). Free memory was 948.7 MB in the beginning and 1.2 GB in the end (delta: -230.1 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. [2019-11-20 03:19:59,408 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.78 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 03:19:59,408 INFO L168 Benchmark]: Boogie Preprocessor took 42.24 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 03:19:59,409 INFO L168 Benchmark]: RCFGBuilder took 404.27 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 29.1 MB). Peak memory consumption was 29.1 MB. Max. memory is 11.5 GB. [2019-11-20 03:19:59,410 INFO L168 Benchmark]: TraceAbstraction took 898.23 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 59.2 MB). Peak memory consumption was 59.2 MB. Max. memory is 11.5 GB. [2019-11-20 03:19:59,412 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 299.65 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 187.2 MB). Free memory was 948.7 MB in the beginning and 1.2 GB in the end (delta: -230.1 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 41.78 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 42.24 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 404.27 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 29.1 MB). Peak memory consumption was 29.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 898.23 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 59.2 MB). Peak memory consumption was 59.2 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: Undeclared function symbol (const Int) de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: Undeclared function symbol (const Int): de.uni_freiburg.informatik.ultimate.logic.NoopScript.term(NoopScript.java:478) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.24-678e011 [2019-11-20 03:20:01,226 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 03:20:01,228 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 03:20:01,241 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 03:20:01,241 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 03:20:01,243 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 03:20:01,244 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 03:20:01,253 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 03:20:01,258 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 03:20:01,261 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 03:20:01,262 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 03:20:01,263 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 03:20:01,264 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 03:20:01,266 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 03:20:01,267 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 03:20:01,269 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 03:20:01,270 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 03:20:01,271 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 03:20:01,273 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 03:20:01,275 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 03:20:01,277 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 03:20:01,277 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 03:20:01,278 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 03:20:01,279 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 03:20:01,281 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 03:20:01,282 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 03:20:01,282 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 03:20:01,283 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 03:20:01,283 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 03:20:01,284 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 03:20:01,284 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 03:20:01,285 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 03:20:01,286 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 03:20:01,286 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 03:20:01,287 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 03:20:01,287 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 03:20:01,288 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 03:20:01,288 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 03:20:01,289 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 03:20:01,289 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 03:20:01,290 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 03:20:01,291 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_d4bea82b-3bcb-4b9e-bef5-1c22022b70f5/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2019-11-20 03:20:01,304 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 03:20:01,305 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 03:20:01,306 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 03:20:01,306 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 03:20:01,306 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 03:20:01,306 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 03:20:01,307 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 03:20:01,307 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 03:20:01,307 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 03:20:01,307 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-20 03:20:01,308 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 03:20:01,308 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-20 03:20:01,308 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-20 03:20:01,308 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-20 03:20:01,309 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 03:20:01,309 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 03:20:01,309 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 03:20:01,309 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-20 03:20:01,310 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 03:20:01,310 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 03:20:01,310 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 03:20:01,310 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 03:20:01,311 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 03:20:01,311 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 03:20:01,311 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 03:20:01,311 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-20 03:20:01,312 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-20 03:20:01,312 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-20 03:20:01,312 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-20 03:20:01,312 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-20 03:20:01,312 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_d4bea82b-3bcb-4b9e-bef5-1c22022b70f5/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 ! call(__VERIFIER_error())) ) 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 -> dfe4f59e301667046d3ef10ba60878cba2d98817 [2019-11-20 03:20:01,588 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 03:20:01,598 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 03:20:01,601 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 03:20:01,602 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 03:20:01,602 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 03:20:01,603 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_d4bea82b-3bcb-4b9e-bef5-1c22022b70f5/bin/uautomizer/../../sv-benchmarks/c/verifythis/prefixsum_rec.c [2019-11-20 03:20:01,663 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d4bea82b-3bcb-4b9e-bef5-1c22022b70f5/bin/uautomizer/data/295fc632f/720039e25cf544bea5e57877c356a77a/FLAGdfe644e1e [2019-11-20 03:20:02,094 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 03:20:02,095 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_d4bea82b-3bcb-4b9e-bef5-1c22022b70f5/sv-benchmarks/c/verifythis/prefixsum_rec.c [2019-11-20 03:20:02,101 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d4bea82b-3bcb-4b9e-bef5-1c22022b70f5/bin/uautomizer/data/295fc632f/720039e25cf544bea5e57877c356a77a/FLAGdfe644e1e [2019-11-20 03:20:02,462 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_d4bea82b-3bcb-4b9e-bef5-1c22022b70f5/bin/uautomizer/data/295fc632f/720039e25cf544bea5e57877c356a77a [2019-11-20 03:20:02,464 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 03:20:02,465 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 03:20:02,466 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 03:20:02,466 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 03:20:02,469 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 03:20:02,470 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 03:20:02" (1/1) ... [2019-11-20 03:20:02,472 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76fa874a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:20:02, skipping insertion in model container [2019-11-20 03:20:02,473 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 03:20:02" (1/1) ... [2019-11-20 03:20:02,479 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 03:20:02,496 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 03:20:02,659 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 03:20:02,672 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 03:20:02,697 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 03:20:02,713 INFO L192 MainTranslator]: Completed translation [2019-11-20 03:20:02,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:20:02 WrapperNode [2019-11-20 03:20:02,713 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 03:20:02,714 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 03:20:02,714 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 03:20:02,714 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 03:20:02,771 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:20:02" (1/1) ... [2019-11-20 03:20:02,782 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:20:02" (1/1) ... [2019-11-20 03:20:02,803 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 03:20:02,804 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 03:20:02,804 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 03:20:02,804 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 03:20:02,813 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:20:02" (1/1) ... [2019-11-20 03:20:02,813 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:20:02" (1/1) ... [2019-11-20 03:20:02,817 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:20:02" (1/1) ... [2019-11-20 03:20:02,817 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:20:02" (1/1) ... [2019-11-20 03:20:02,826 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:20:02" (1/1) ... [2019-11-20 03:20:02,831 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:20:02" (1/1) ... [2019-11-20 03:20:02,833 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:20:02" (1/1) ... [2019-11-20 03:20:02,836 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 03:20:02,837 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 03:20:02,837 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 03:20:02,837 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 03:20:02,838 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:20:02" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d4bea82b-3bcb-4b9e-bef5-1c22022b70f5/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 03:20:02,884 INFO L130 BoogieDeclarations]: Found specification of procedure downsweep [2019-11-20 03:20:02,884 INFO L138 BoogieDeclarations]: Found implementation of procedure downsweep [2019-11-20 03:20:02,885 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-20 03:20:02,885 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-20 03:20:02,885 INFO L130 BoogieDeclarations]: Found specification of procedure upsweep [2019-11-20 03:20:02,885 INFO L138 BoogieDeclarations]: Found implementation of procedure upsweep [2019-11-20 03:20:02,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 03:20:02,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 03:20:02,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-20 03:20:02,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-20 03:20:03,263 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 03:20:03,263 INFO L285 CfgBuilder]: Removed 17 assume(true) statements. [2019-11-20 03:20:03,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 03:20:03 BoogieIcfgContainer [2019-11-20 03:20:03,265 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 03:20:03,265 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 03:20:03,266 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 03:20:03,268 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 03:20:03,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 03:20:02" (1/3) ... [2019-11-20 03:20:03,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@649cdf18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 03:20:03, skipping insertion in model container [2019-11-20 03:20:03,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:20:02" (2/3) ... [2019-11-20 03:20:03,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@649cdf18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 03:20:03, skipping insertion in model container [2019-11-20 03:20:03,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 03:20:03" (3/3) ... [2019-11-20 03:20:03,271 INFO L109 eAbstractionObserver]: Analyzing ICFG prefixsum_rec.c [2019-11-20 03:20:03,279 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 03:20:03,286 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-20 03:20:03,296 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-20 03:20:03,317 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 03:20:03,317 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-20 03:20:03,317 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 03:20:03,317 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 03:20:03,317 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 03:20:03,317 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 03:20:03,317 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 03:20:03,318 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 03:20:03,332 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2019-11-20 03:20:03,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-20 03:20:03,337 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:20:03,338 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 03:20:03,339 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:20:03,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:20:03,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1360829009, now seen corresponding path program 1 times [2019-11-20 03:20:03,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 03:20:03,353 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1139358258] [2019-11-20 03:20:03,353 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d4bea82b-3bcb-4b9e-bef5-1c22022b70f5/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 03:20:03,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:20:03,533 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 03:20:03,539 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:20:03,610 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 03:20:03,614 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 03:20:03,710 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 03:20:03,716 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1139358258] [2019-11-20 03:20:03,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 03:20:03,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2019-11-20 03:20:03,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630210845] [2019-11-20 03:20:03,722 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-20 03:20:03,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 03:20:03,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-20 03:20:03,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-20 03:20:03,739 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 7 states. [2019-11-20 03:20:03,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:20:03,919 INFO L93 Difference]: Finished difference Result 80 states and 107 transitions. [2019-11-20 03:20:03,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 03:20:03,921 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2019-11-20 03:20:03,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:20:03,927 INFO L225 Difference]: With dead ends: 80 [2019-11-20 03:20:03,928 INFO L226 Difference]: Without dead ends: 34 [2019-11-20 03:20:03,931 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-11-20 03:20:03,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-20 03:20:03,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2019-11-20 03:20:03,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-20 03:20:03,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2019-11-20 03:20:03,964 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 24 [2019-11-20 03:20:03,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:20:03,965 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2019-11-20 03:20:03,965 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-20 03:20:03,965 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2019-11-20 03:20:03,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-20 03:20:03,967 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:20:03,967 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] [2019-11-20 03:20:04,169 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 03:20:04,169 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:20:04,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:20:04,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1965744595, now seen corresponding path program 1 times [2019-11-20 03:20:04,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 03:20:04,170 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [411724992] [2019-11-20 03:20:04,170 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d4bea82b-3bcb-4b9e-bef5-1c22022b70f5/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 03:20:04,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:20:04,379 WARN L253 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 54 conjunts are in the unsatisfiable core [2019-11-20 03:20:04,383 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:20:04,417 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 03:20:04,418 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 03:20:04,430 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 03:20:04,437 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 7 treesize of output 6 [2019-11-20 03:20:04,438 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 03:20:04,451 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 03:20:04,452 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 03:20:04,452 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:17, output treesize:15 [2019-11-20 03:20:04,490 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 03:20:04,491 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 03:20:04,492 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 03:20:04,507 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 03:20:04,513 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 14 treesize of output 16 [2019-11-20 03:20:04,514 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 03:20:04,536 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 03:20:04,536 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 03:20:04,537 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:32, output treesize:23 [2019-11-20 03:20:04,625 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2019-11-20 03:20:04,626 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 03:20:04,648 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 03:20:04,649 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 03:20:04,649 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:39 [2019-11-20 03:20:06,707 WARN L191 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 25 [2019-11-20 03:20:08,771 WARN L191 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 23 [2019-11-20 03:20:10,844 WARN L191 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 23 [2019-11-20 03:20:11,111 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 50 [2019-11-20 03:20:11,112 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 03:20:11,135 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 03:20:11,136 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 03:20:11,136 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:72, output treesize:61 [2019-11-20 03:20:11,193 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2019-11-20 03:20:11,194 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 03:20:11,222 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 03:20:11,223 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 03:20:11,223 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:41 [2019-11-20 03:20:11,426 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 67 [2019-11-20 03:20:11,427 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 03:20:11,455 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 03:20:11,456 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 03:20:11,456 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:91, output treesize:79 [2019-11-20 03:20:14,270 WARN L191 SmtUtils]: Spent 2.73 s on a formula simplification that was a NOOP. DAG size: 38 [2019-11-20 03:20:17,059 WARN L191 SmtUtils]: Spent 2.71 s on a formula simplification that was a NOOP. DAG size: 42 [2019-11-20 03:20:17,063 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 03:20:17,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:20:17,131 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 03:20:17,743 WARN L191 SmtUtils]: Spent 345.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2019-11-20 03:20:17,997 WARN L191 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2019-11-20 03:20:21,530 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2019-11-20 03:20:26,823 WARN L191 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2019-11-20 03:20:27,889 WARN L191 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2019-11-20 03:20:28,094 WARN L191 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2019-11-20 03:20:30,440 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2019-11-20 03:20:32,441 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2019-11-20 03:20:33,654 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2019-11-20 03:20:34,863 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2019-11-20 03:20:35,564 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 03:20:35,566 WARN L227 Elim1Store]: Array PQE input equivalent to true [2019-11-20 03:20:35,567 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 03:20:35,569 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 03:20:35,573 INFO L464 ElimStorePlain]: Eliminatee |#memory_int| vanished before elimination [2019-11-20 03:20:35,573 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 03:20:35,574 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:103, output treesize:1 [2019-11-20 03:20:35,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:20:35,583 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [411724992] [2019-11-20 03:20:35,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:20:35,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2019-11-20 03:20:35,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363418894] [2019-11-20 03:20:35,586 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-20 03:20:35,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 03:20:35,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-20 03:20:35,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=697, Unknown=3, NotChecked=0, Total=812 [2019-11-20 03:20:35,588 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand 29 states. [2019-11-20 03:20:44,139 WARN L191 SmtUtils]: Spent 460.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2019-11-20 03:21:04,754 WARN L191 SmtUtils]: Spent 412.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2019-11-20 03:21:07,043 WARN L191 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 21 [2019-11-20 03:21:23,144 WARN L191 SmtUtils]: Spent 8.29 s on a formula simplification that was a NOOP. DAG size: 42 [2019-11-20 03:21:30,379 WARN L191 SmtUtils]: Spent 1.79 s on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2019-11-20 03:21:36,495 WARN L191 SmtUtils]: Spent 1.81 s on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2019-11-20 03:21:51,414 WARN L191 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2019-11-20 03:22:01,131 WARN L191 SmtUtils]: Spent 1.76 s on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2019-11-20 03:22:03,092 WARN L191 SmtUtils]: Spent 1.80 s on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2019-11-20 03:22:04,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:22:04,645 INFO L93 Difference]: Finished difference Result 92 states and 119 transitions. [2019-11-20 03:22:04,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-20 03:22:04,653 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 26 [2019-11-20 03:22:04,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:22:04,656 INFO L225 Difference]: With dead ends: 92 [2019-11-20 03:22:04,657 INFO L226 Difference]: Without dead ends: 90 [2019-11-20 03:22:04,658 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 59.6s TimeCoverageRelationStatistics Valid=394, Invalid=1857, Unknown=5, NotChecked=0, Total=2256 [2019-11-20 03:22:04,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-11-20 03:22:04,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 47. [2019-11-20 03:22:04,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-20 03:22:04,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 61 transitions. [2019-11-20 03:22:04,674 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 61 transitions. Word has length 26 [2019-11-20 03:22:04,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:22:04,675 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 61 transitions. [2019-11-20 03:22:04,675 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-20 03:22:04,675 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 61 transitions. [2019-11-20 03:22:04,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-20 03:22:04,677 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:22:04,677 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] [2019-11-20 03:22:04,880 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 03:22:04,880 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:22:04,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:22:04,880 INFO L82 PathProgramCache]: Analyzing trace with hash -926294428, now seen corresponding path program 1 times [2019-11-20 03:22:04,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 03:22:04,881 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [235526198] [2019-11-20 03:22:04,881 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d4bea82b-3bcb-4b9e-bef5-1c22022b70f5/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 03:22:05,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:22:05,037 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-20 03:22:05,039 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:22:05,157 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:22:05,157 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 03:22:05,385 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:22:05,385 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [235526198] [2019-11-20 03:22:05,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:22:05,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2019-11-20 03:22:05,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938690745] [2019-11-20 03:22:05,386 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-20 03:22:05,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 03:22:05,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-20 03:22:05,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2019-11-20 03:22:05,387 INFO L87 Difference]: Start difference. First operand 47 states and 61 transitions. Second operand 14 states. [2019-11-20 03:22:05,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:22:05,645 INFO L93 Difference]: Finished difference Result 72 states and 93 transitions. [2019-11-20 03:22:05,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-20 03:22:05,648 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 30 [2019-11-20 03:22:05,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:22:05,650 INFO L225 Difference]: With dead ends: 72 [2019-11-20 03:22:05,650 INFO L226 Difference]: Without dead ends: 60 [2019-11-20 03:22:05,651 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2019-11-20 03:22:05,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-20 03:22:05,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2019-11-20 03:22:05,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-20 03:22:05,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 77 transitions. [2019-11-20 03:22:05,663 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 77 transitions. Word has length 30 [2019-11-20 03:22:05,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:22:05,664 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 77 transitions. [2019-11-20 03:22:05,664 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-20 03:22:05,664 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 77 transitions. [2019-11-20 03:22:05,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-20 03:22:05,666 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:22:05,666 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 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] [2019-11-20 03:22:05,869 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 03:22:05,869 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:22:05,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:22:05,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1344094110, now seen corresponding path program 2 times [2019-11-20 03:22:05,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 03:22:05,870 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [628060444] [2019-11-20 03:22:05,870 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d4bea82b-3bcb-4b9e-bef5-1c22022b70f5/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 03:22:06,082 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 03:22:06,082 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:22:06,085 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 03:22:06,087 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:22:06,112 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 03:22:06,155 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-20 03:22:06,155 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 03:22:06,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-20 03:22:06,292 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [628060444] [2019-11-20 03:22:06,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:22:06,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2019-11-20 03:22:06,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089878751] [2019-11-20 03:22:06,293 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-20 03:22:06,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 03:22:06,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-20 03:22:06,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-11-20 03:22:06,294 INFO L87 Difference]: Start difference. First operand 57 states and 77 transitions. Second operand 12 states. [2019-11-20 03:22:06,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:22:06,719 INFO L93 Difference]: Finished difference Result 114 states and 153 transitions. [2019-11-20 03:22:06,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-20 03:22:06,721 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2019-11-20 03:22:06,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:22:06,722 INFO L225 Difference]: With dead ends: 114 [2019-11-20 03:22:06,722 INFO L226 Difference]: Without dead ends: 75 [2019-11-20 03:22:06,723 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2019-11-20 03:22:06,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-11-20 03:22:06,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 65. [2019-11-20 03:22:06,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-20 03:22:06,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 86 transitions. [2019-11-20 03:22:06,744 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 86 transitions. Word has length 32 [2019-11-20 03:22:06,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:22:06,744 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 86 transitions. [2019-11-20 03:22:06,745 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-20 03:22:06,745 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 86 transitions. [2019-11-20 03:22:06,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-20 03:22:06,747 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:22:06,747 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 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] [2019-11-20 03:22:06,949 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 03:22:06,949 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:22:06,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:22:06,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1543543150, now seen corresponding path program 1 times [2019-11-20 03:22:06,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 03:22:06,950 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1884171470] [2019-11-20 03:22:06,950 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d4bea82b-3bcb-4b9e-bef5-1c22022b70f5/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 03:22:07,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:22:07,176 WARN L253 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 65 conjunts are in the unsatisfiable core [2019-11-20 03:22:07,179 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:22:07,199 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 03:22:07,199 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 03:22:07,210 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 03:22:07,214 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 7 treesize of output 6 [2019-11-20 03:22:07,214 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 03:22:07,224 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 03:22:07,224 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 03:22:07,224 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:25, output treesize:23 [2019-11-20 03:22:07,251 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 03:22:07,252 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 03:22:07,252 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 03:22:07,268 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 03:22:07,273 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 14 treesize of output 16 [2019-11-20 03:22:07,273 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 03:22:07,303 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 03:22:07,304 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 03:22:07,304 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:31 [2019-11-20 03:22:07,411 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2019-11-20 03:22:07,412 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 03:22:07,488 INFO L567 ElimStorePlain]: treesize reduction 3, result has 94.2 percent of original size [2019-11-20 03:22:07,488 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 03:22:07,488 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:60, output treesize:49 [2019-11-20 03:22:07,576 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2019-11-20 03:22:07,576 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 03:22:07,600 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 03:22:07,600 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 03:22:07,601 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:64, output treesize:56 [2019-11-20 03:22:07,858 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 50 [2019-11-20 03:22:07,858 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 03:22:07,881 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 03:22:07,882 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 03:22:07,882 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:80, output treesize:69 [2019-11-20 03:22:07,913 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2019-11-20 03:22:07,913 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 03:22:07,931 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 03:22:07,931 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 03:22:07,932 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:58, output treesize:49 [2019-11-20 03:22:08,095 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 67 [2019-11-20 03:22:08,095 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 03:22:08,114 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 03:22:08,115 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 03:22:08,115 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:99, output treesize:87 [2019-11-20 03:22:08,990 WARN L191 SmtUtils]: Spent 824.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2019-11-20 03:22:09,881 WARN L191 SmtUtils]: Spent 839.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2019-11-20 03:22:10,859 WARN L191 SmtUtils]: Spent 873.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2019-11-20 03:22:11,755 WARN L191 SmtUtils]: Spent 836.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2019-11-20 03:22:11,757 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 03:22:11,805 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:22:11,805 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 03:22:12,709 WARN L191 SmtUtils]: Spent 398.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2019-11-20 03:22:13,086 WARN L191 SmtUtils]: Spent 376.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2019-11-20 03:22:17,777 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2019-11-20 03:22:23,076 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2019-11-20 03:22:24,718 WARN L191 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2019-11-20 03:22:24,980 WARN L191 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2019-11-20 03:22:26,458 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2019-11-20 03:22:28,165 WARN L191 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2019-11-20 03:22:29,586 WARN L191 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2019-11-20 03:22:31,035 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2019-11-20 03:22:32,808 WARN L191 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2019-11-20 03:22:35,296 WARN L191 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2019-11-20 03:22:38,490 WARN L191 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2019-11-20 03:22:40,578 WARN L191 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2019-11-20 03:22:55,934 WARN L191 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2019-11-20 03:22:55,942 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 03:22:55,944 WARN L227 Elim1Store]: Array PQE input equivalent to true [2019-11-20 03:22:55,944 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 03:22:55,945 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 03:22:55,946 INFO L464 ElimStorePlain]: Eliminatee |#memory_int| vanished before elimination [2019-11-20 03:22:55,946 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 03:22:55,946 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:364, output treesize:1 [2019-11-20 03:22:55,956 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 03:22:55,956 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1884171470] [2019-11-20 03:22:55,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:22:55,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2019-11-20 03:22:55,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655978989] [2019-11-20 03:22:55,957 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-11-20 03:22:55,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 03:22:55,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-11-20 03:22:55,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1238, Unknown=10, NotChecked=0, Total=1406 [2019-11-20 03:22:55,958 INFO L87 Difference]: Start difference. First operand 65 states and 86 transitions. Second operand 38 states. [2019-11-20 03:23:04,741 WARN L191 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2019-11-20 03:23:08,895 WARN L191 SmtUtils]: Spent 575.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2019-11-20 03:23:15,634 WARN L191 SmtUtils]: Spent 2.36 s on a formula simplification that was a NOOP. DAG size: 108 [2019-11-20 03:23:24,815 WARN L191 SmtUtils]: Spent 1.70 s on a formula simplification that was a NOOP. DAG size: 73 [2019-11-20 03:23:28,147 WARN L191 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2019-11-20 03:23:32,341 WARN L191 SmtUtils]: Spent 808.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2019-11-20 03:23:51,980 WARN L191 SmtUtils]: Spent 368.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2019-11-20 03:23:59,515 WARN L191 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2019-11-20 03:24:56,284 WARN L191 SmtUtils]: Spent 17.28 s on a formula simplification. DAG size of input: 65 DAG size of output: 21 [2019-11-20 03:25:11,239 WARN L191 SmtUtils]: Spent 6.28 s on a formula simplification that was a NOOP. DAG size: 51 [2019-11-20 03:25:14,503 WARN L191 SmtUtils]: Spent 2.39 s on a formula simplification. DAG size of input: 79 DAG size of output: 79 [2019-11-20 03:25:17,319 WARN L191 SmtUtils]: Spent 2.48 s on a formula simplification. DAG size of input: 83 DAG size of output: 83 [2019-11-20 03:25:21,504 WARN L191 SmtUtils]: Spent 3.39 s on a formula simplification. DAG size of input: 96 DAG size of output: 96 [2019-11-20 03:25:26,585 WARN L191 SmtUtils]: Spent 2.40 s on a formula simplification. DAG size of input: 87 DAG size of output: 87 [2019-11-20 03:25:27,140 WARN L191 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2019-11-20 03:25:27,604 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2019-11-20 03:25:28,063 WARN L191 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2019-11-20 03:25:44,221 WARN L191 SmtUtils]: Spent 9.37 s on a formula simplification that was a NOOP. DAG size: 110 [2019-11-20 03:26:06,357 WARN L191 SmtUtils]: Spent 10.15 s on a formula simplification that was a NOOP. DAG size: 113 [2019-11-20 03:26:21,815 WARN L191 SmtUtils]: Spent 1.37 s on a formula simplification that was a NOOP. DAG size: 75 [2019-11-20 03:26:29,293 WARN L191 SmtUtils]: Spent 2.22 s on a formula simplification that was a NOOP. DAG size: 92 [2019-11-20 03:26:39,722 WARN L191 SmtUtils]: Spent 2.74 s on a formula simplification that was a NOOP. DAG size: 95 [2019-11-20 03:26:48,092 WARN L191 SmtUtils]: Spent 1.77 s on a formula simplification that was a NOOP. DAG size: 87 [2019-11-20 03:26:55,640 WARN L191 SmtUtils]: Spent 2.40 s on a formula simplification that was a NOOP. DAG size: 87 [2019-11-20 03:27:02,189 WARN L191 SmtUtils]: Spent 1.44 s on a formula simplification that was a NOOP. DAG size: 88 [2019-11-20 03:27:11,632 WARN L191 SmtUtils]: Spent 3.88 s on a formula simplification that was a NOOP. DAG size: 79 [2019-11-20 03:27:16,840 WARN L191 SmtUtils]: Spent 1.49 s on a formula simplification that was a NOOP. DAG size: 78 [2019-11-20 03:27:28,261 WARN L191 SmtUtils]: Spent 8.51 s on a formula simplification that was a NOOP. DAG size: 79 [2019-11-20 03:27:43,430 WARN L191 SmtUtils]: Spent 8.54 s on a formula simplification that was a NOOP. DAG size: 82 [2019-11-20 03:28:05,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:28:05,634 INFO L93 Difference]: Finished difference Result 164 states and 205 transitions. [2019-11-20 03:28:05,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-11-20 03:28:05,666 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 33 [2019-11-20 03:28:05,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:28:05,669 INFO L225 Difference]: With dead ends: 164 [2019-11-20 03:28:05,670 INFO L226 Difference]: Without dead ends: 130 [2019-11-20 03:28:05,674 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1245 ImplicationChecksByTransitivity, 223.3s TimeCoverageRelationStatistics Valid=738, Invalid=4948, Unknown=14, NotChecked=0, Total=5700 [2019-11-20 03:28:05,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-11-20 03:28:05,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 81. [2019-11-20 03:28:05,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-11-20 03:28:05,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 106 transitions. [2019-11-20 03:28:05,692 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 106 transitions. Word has length 33 [2019-11-20 03:28:05,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:28:05,692 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 106 transitions. [2019-11-20 03:28:05,693 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-11-20 03:28:05,693 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 106 transitions. [2019-11-20 03:28:05,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-20 03:28:05,695 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:28:05,695 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-11-20 03:28:05,895 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 03:28:05,896 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:28:05,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:28:05,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1489411955, now seen corresponding path program 1 times [2019-11-20 03:28:05,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 03:28:05,897 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [448935835] [2019-11-20 03:28:05,897 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d4bea82b-3bcb-4b9e-bef5-1c22022b70f5/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 03:28:06,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:28:06,096 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 03:28:06,099 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:28:06,197 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-20 03:28:06,197 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 03:28:06,386 WARN L191 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-11-20 03:28:06,586 WARN L191 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-11-20 03:28:09,019 WARN L191 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2019-11-20 03:28:09,873 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2019-11-20 03:28:10,393 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2019-11-20 03:28:11,043 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-20 03:28:11,043 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [448935835] [2019-11-20 03:28:11,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:28:11,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2019-11-20 03:28:11,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412541751] [2019-11-20 03:28:11,044 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-20 03:28:11,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 03:28:11,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-20 03:28:11,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2019-11-20 03:28:11,044 INFO L87 Difference]: Start difference. First operand 81 states and 106 transitions. Second operand 14 states. [2019-11-20 03:28:14,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:28:14,667 INFO L93 Difference]: Finished difference Result 108 states and 134 transitions. [2019-11-20 03:28:14,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 03:28:14,676 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2019-11-20 03:28:14,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:28:14,678 INFO L225 Difference]: With dead ends: 108 [2019-11-20 03:28:14,678 INFO L226 Difference]: Without dead ends: 94 [2019-11-20 03:28:14,678 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2019-11-20 03:28:14,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-11-20 03:28:14,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 79. [2019-11-20 03:28:14,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-11-20 03:28:14,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 101 transitions. [2019-11-20 03:28:14,702 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 101 transitions. Word has length 36 [2019-11-20 03:28:14,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:28:14,703 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 101 transitions. [2019-11-20 03:28:14,703 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-20 03:28:14,704 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 101 transitions. [2019-11-20 03:28:14,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-20 03:28:14,711 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:28:14,711 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2019-11-20 03:28:14,915 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 03:28:14,915 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:28:14,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:28:14,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1252358977, now seen corresponding path program 1 times [2019-11-20 03:28:14,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 03:28:14,916 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1767927904] [2019-11-20 03:28:14,916 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d4bea82b-3bcb-4b9e-bef5-1c22022b70f5/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 03:28:15,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:28:15,083 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-20 03:28:15,085 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:28:15,166 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-20 03:28:15,166 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 03:28:15,345 WARN L191 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-11-20 03:28:15,492 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-11-20 03:28:17,739 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2019-11-20 03:28:19,015 WARN L191 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2019-11-20 03:28:19,589 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-20 03:28:19,589 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1767927904] [2019-11-20 03:28:19,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:28:19,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2019-11-20 03:28:19,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696215826] [2019-11-20 03:28:19,590 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-20 03:28:19,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 03:28:19,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-20 03:28:19,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2019-11-20 03:28:19,590 INFO L87 Difference]: Start difference. First operand 79 states and 101 transitions. Second operand 14 states. [2019-11-20 03:28:22,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:28:22,133 INFO L93 Difference]: Finished difference Result 106 states and 131 transitions. [2019-11-20 03:28:22,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 03:28:22,146 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2019-11-20 03:28:22,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:28:22,147 INFO L225 Difference]: With dead ends: 106 [2019-11-20 03:28:22,147 INFO L226 Difference]: Without dead ends: 76 [2019-11-20 03:28:22,148 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2019-11-20 03:28:22,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-11-20 03:28:22,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 64. [2019-11-20 03:28:22,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-20 03:28:22,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 81 transitions. [2019-11-20 03:28:22,159 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 81 transitions. Word has length 38 [2019-11-20 03:28:22,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:28:22,159 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 81 transitions. [2019-11-20 03:28:22,159 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-20 03:28:22,159 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 81 transitions. [2019-11-20 03:28:22,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-20 03:28:22,160 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:28:22,161 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2019-11-20 03:28:22,364 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 03:28:22,364 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:28:22,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:28:22,364 INFO L82 PathProgramCache]: Analyzing trace with hash -2008168903, now seen corresponding path program 1 times [2019-11-20 03:28:22,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 03:28:22,365 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [641238115] [2019-11-20 03:28:22,365 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d4bea82b-3bcb-4b9e-bef5-1c22022b70f5/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 03:28:22,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:28:22,517 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 03:28:22,519 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:28:22,629 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-20 03:28:22,629 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 03:28:22,911 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-20 03:28:22,911 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [641238115] [2019-11-20 03:28:22,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:28:22,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2019-11-20 03:28:22,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158503] [2019-11-20 03:28:22,912 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-20 03:28:22,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 03:28:22,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-20 03:28:22,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2019-11-20 03:28:22,912 INFO L87 Difference]: Start difference. First operand 64 states and 81 transitions. Second operand 18 states. [2019-11-20 03:28:23,684 WARN L191 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2019-11-20 03:28:24,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:28:24,142 INFO L93 Difference]: Finished difference Result 146 states and 186 transitions. [2019-11-20 03:28:24,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-20 03:28:24,155 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 41 [2019-11-20 03:28:24,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:28:24,156 INFO L225 Difference]: With dead ends: 146 [2019-11-20 03:28:24,156 INFO L226 Difference]: Without dead ends: 105 [2019-11-20 03:28:24,157 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=185, Invalid=517, Unknown=0, NotChecked=0, Total=702 [2019-11-20 03:28:24,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-11-20 03:28:24,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 74. [2019-11-20 03:28:24,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-11-20 03:28:24,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 93 transitions. [2019-11-20 03:28:24,171 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 93 transitions. Word has length 41 [2019-11-20 03:28:24,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:28:24,171 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 93 transitions. [2019-11-20 03:28:24,171 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-20 03:28:24,172 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 93 transitions. [2019-11-20 03:28:24,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-20 03:28:24,172 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:28:24,173 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 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] [2019-11-20 03:28:24,376 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 03:28:24,376 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:28:24,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:28:24,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1603930441, now seen corresponding path program 2 times [2019-11-20 03:28:24,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 03:28:24,377 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1239381259] [2019-11-20 03:28:24,377 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d4bea82b-3bcb-4b9e-bef5-1c22022b70f5/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 03:28:24,593 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 03:28:24,593 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:28:24,595 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-20 03:28:24,597 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:28:24,638 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 03:28:24,701 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-20 03:28:24,701 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 03:28:24,930 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-20 03:28:24,931 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1239381259] [2019-11-20 03:28:24,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:28:24,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2019-11-20 03:28:24,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38390544] [2019-11-20 03:28:24,931 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-20 03:28:24,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 03:28:24,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-20 03:28:24,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-11-20 03:28:24,932 INFO L87 Difference]: Start difference. First operand 74 states and 93 transitions. Second operand 18 states. [2019-11-20 03:28:25,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:28:25,583 INFO L93 Difference]: Finished difference Result 157 states and 195 transitions. [2019-11-20 03:28:25,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-20 03:28:25,585 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 43 [2019-11-20 03:28:25,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:28:25,586 INFO L225 Difference]: With dead ends: 157 [2019-11-20 03:28:25,586 INFO L226 Difference]: Without dead ends: 104 [2019-11-20 03:28:25,587 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2019-11-20 03:28:25,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-11-20 03:28:25,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 84. [2019-11-20 03:28:25,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-11-20 03:28:25,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 104 transitions. [2019-11-20 03:28:25,600 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 104 transitions. Word has length 43 [2019-11-20 03:28:25,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:28:25,601 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 104 transitions. [2019-11-20 03:28:25,601 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-20 03:28:25,601 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 104 transitions. [2019-11-20 03:28:25,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-20 03:28:25,602 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:28:25,602 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 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] [2019-11-20 03:28:25,805 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 03:28:25,805 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:28:25,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:28:25,805 INFO L82 PathProgramCache]: Analyzing trace with hash -447442297, now seen corresponding path program 3 times [2019-11-20 03:28:25,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 03:28:25,806 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1721485593] [2019-11-20 03:28:25,806 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d4bea82b-3bcb-4b9e-bef5-1c22022b70f5/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 03:28:26,015 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-20 03:28:26,015 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:28:26,017 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-20 03:28:26,018 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:28:26,077 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 03:28:26,188 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-20 03:28:26,188 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 03:28:26,494 WARN L191 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2019-11-20 03:28:26,669 WARN L191 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2019-11-20 03:28:27,236 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2019-11-20 03:28:28,172 WARN L191 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2019-11-20 03:28:29,315 WARN L191 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2019-11-20 03:28:30,248 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2019-11-20 03:28:30,924 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2019-11-20 03:28:31,701 WARN L191 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-11-20 03:28:32,558 WARN L191 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2019-11-20 03:28:32,580 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-20 03:28:32,580 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1721485593] [2019-11-20 03:28:32,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:28:32,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2019-11-20 03:28:32,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394886236] [2019-11-20 03:28:32,580 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-20 03:28:32,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 03:28:32,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-20 03:28:32,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2019-11-20 03:28:32,581 INFO L87 Difference]: Start difference. First operand 84 states and 104 transitions. Second operand 19 states. [2019-11-20 03:28:36,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:28:36,877 INFO L93 Difference]: Finished difference Result 166 states and 204 transitions. [2019-11-20 03:28:36,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-20 03:28:36,878 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 44 [2019-11-20 03:28:36,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:28:36,879 INFO L225 Difference]: With dead ends: 166 [2019-11-20 03:28:36,879 INFO L226 Difference]: Without dead ends: 119 [2019-11-20 03:28:36,880 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2019-11-20 03:28:36,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-11-20 03:28:36,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 79. [2019-11-20 03:28:36,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-11-20 03:28:36,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 93 transitions. [2019-11-20 03:28:36,891 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 93 transitions. Word has length 44 [2019-11-20 03:28:36,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:28:36,891 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 93 transitions. [2019-11-20 03:28:36,891 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-20 03:28:36,892 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 93 transitions. [2019-11-20 03:28:36,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-20 03:28:36,892 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:28:36,892 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 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] [2019-11-20 03:28:37,095 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 03:28:37,096 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:28:37,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:28:37,096 INFO L82 PathProgramCache]: Analyzing trace with hash -646897607, now seen corresponding path program 1 times [2019-11-20 03:28:37,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 03:28:37,096 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [701634073] [2019-11-20 03:28:37,096 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d4bea82b-3bcb-4b9e-bef5-1c22022b70f5/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 03:28:37,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:28:37,291 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-20 03:28:37,292 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:28:37,501 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-20 03:28:37,501 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 03:28:37,713 WARN L191 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2019-11-20 03:28:37,911 WARN L191 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2019-11-20 03:28:39,270 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2019-11-20 03:28:40,485 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2019-11-20 03:28:41,449 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2019-11-20 03:28:42,791 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2019-11-20 03:28:43,528 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2019-11-20 03:28:45,095 WARN L191 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2019-11-20 03:28:45,834 WARN L191 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 10 [2019-11-20 03:28:46,622 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2019-11-20 03:28:47,484 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-11-20 03:28:47,515 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-20 03:28:47,515 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [701634073] [2019-11-20 03:28:47,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:28:47,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2019-11-20 03:28:47,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922793455] [2019-11-20 03:28:47,516 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-20 03:28:47,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 03:28:47,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-20 03:28:47,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2019-11-20 03:28:47,517 INFO L87 Difference]: Start difference. First operand 79 states and 93 transitions. Second operand 26 states. [2019-11-20 03:28:50,053 WARN L191 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2019-11-20 03:28:51,370 WARN L191 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2019-11-20 03:28:52,816 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2019-11-20 03:28:56,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:28:56,062 INFO L93 Difference]: Finished difference Result 104 states and 123 transitions. [2019-11-20 03:28:56,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-20 03:28:56,073 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 46 [2019-11-20 03:28:56,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:28:56,074 INFO L225 Difference]: With dead ends: 104 [2019-11-20 03:28:56,074 INFO L226 Difference]: Without dead ends: 97 [2019-11-20 03:28:56,075 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=197, Invalid=733, Unknown=0, NotChecked=0, Total=930 [2019-11-20 03:28:56,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-11-20 03:28:56,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 81. [2019-11-20 03:28:56,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-11-20 03:28:56,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 96 transitions. [2019-11-20 03:28:56,088 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 96 transitions. Word has length 46 [2019-11-20 03:28:56,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:28:56,088 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 96 transitions. [2019-11-20 03:28:56,088 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-20 03:28:56,088 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 96 transitions. [2019-11-20 03:28:56,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-11-20 03:28:56,090 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:28:56,090 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 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 03:28:56,292 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 03:28:56,293 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:28:56,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:28:56,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1957545511, now seen corresponding path program 1 times [2019-11-20 03:28:56,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 03:28:56,294 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1470827156] [2019-11-20 03:28:56,294 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d4bea82b-3bcb-4b9e-bef5-1c22022b70f5/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 03:28:56,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:28:56,627 INFO L255 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-20 03:28:56,629 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:28:57,666 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 14 proven. 43 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-20 03:28:57,666 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 03:28:57,837 WARN L191 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-11-20 03:28:58,008 WARN L191 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-11-20 03:28:58,212 WARN L191 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2019-11-20 03:28:58,377 WARN L191 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2019-11-20 03:28:58,954 WARN L191 SmtUtils]: Spent 577.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2019-11-20 03:28:59,665 WARN L191 SmtUtils]: Spent 710.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2019-11-20 03:29:01,975 WARN L191 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2019-11-20 03:29:06,719 WARN L191 SmtUtils]: Spent 416.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-11-20 03:29:06,944 WARN L191 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-11-20 03:29:07,136 WARN L191 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-11-20 03:29:15,994 WARN L191 SmtUtils]: Spent 992.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2019-11-20 03:29:15,996 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 03:29:18,985 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2019-11-20 03:29:20,652 WARN L191 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2019-11-20 03:29:31,230 WARN L191 SmtUtils]: Spent 1.15 s on a formula simplification that was a NOOP. DAG size: 27 [2019-11-20 03:29:33,344 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 (bvsdiv (bvadd |c_downsweep_#in~right| (_ bv1 32)) (_ bv2 32)))) (or (let ((.cse0 (bvadd .cse1 (_ bv4294967295 32)))) (bvsgt .cse0 (bvadd .cse1 (bvneg (bvsdiv (bvadd (bvneg .cse0) |c_downsweep_#in~right|) (_ bv2 32)))))) (not (= (bvadd |c_downsweep_#in~left| (_ bv1 32)) .cse1)) (not (bvsgt |c_downsweep_#in~left| (bvadd |c_downsweep_#in~left| (bvneg (bvsdiv (bvadd (bvneg |c_downsweep_#in~left|) |c_downsweep_#in~right|) (_ bv2 32))) (_ bv1 32)))))) is different from true [2019-11-20 03:29:38,719 WARN L191 SmtUtils]: Spent 693.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2019-11-20 03:29:44,950 WARN L191 SmtUtils]: Spent 611.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2019-11-20 03:29:50,640 WARN L191 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2019-11-20 03:29:54,591 WARN L191 SmtUtils]: Spent 430.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2019-11-20 03:30:00,128 WARN L191 SmtUtils]: Spent 519.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2019-11-20 03:30:04,500 WARN L191 SmtUtils]: Spent 593.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2019-11-20 03:30:04,617 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 14 proven. 41 refuted. 6 times theorem prover too weak. 63 trivial. 0 not checked. [2019-11-20 03:30:04,617 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1470827156] [2019-11-20 03:30:04,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:30:04,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2019-11-20 03:30:04,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318636927] [2019-11-20 03:30:04,618 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-20 03:30:04,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 03:30:04,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-20 03:30:04,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=637, Unknown=6, NotChecked=52, Total=812 [2019-11-20 03:30:04,619 INFO L87 Difference]: Start difference. First operand 81 states and 96 transitions. Second operand 29 states. [2019-11-20 03:30:23,565 WARN L191 SmtUtils]: Spent 2.43 s on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2019-11-20 03:30:37,117 WARN L191 SmtUtils]: Spent 2.27 s on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2019-11-20 03:30:41,726 WARN L191 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2019-11-20 03:30:45,365 WARN L191 SmtUtils]: Spent 466.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2019-11-20 03:30:57,145 WARN L191 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2019-11-20 03:31:03,820 WARN L191 SmtUtils]: Spent 788.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2019-11-20 03:31:16,632 WARN L191 SmtUtils]: Spent 9.18 s on a formula simplification that was a NOOP. DAG size: 30 [2019-11-20 03:31:21,353 WARN L191 SmtUtils]: Spent 1.20 s on a formula simplification that was a NOOP. DAG size: 19 [2019-11-20 03:31:45,435 WARN L191 SmtUtils]: Spent 18.44 s on a formula simplification that was a NOOP. DAG size: 41 [2019-11-20 03:31:49,780 WARN L191 SmtUtils]: Spent 654.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2019-11-20 03:32:14,274 WARN L191 SmtUtils]: Spent 661.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2019-11-20 03:32:34,461 WARN L191 SmtUtils]: Spent 6.94 s on a formula simplification that was a NOOP. DAG size: 37 [2019-11-20 03:33:13,036 WARN L191 SmtUtils]: Spent 9.40 s on a formula simplification that was a NOOP. DAG size: 27 [2019-11-20 03:33:29,231 WARN L191 SmtUtils]: Spent 9.32 s on a formula simplification that was a NOOP. DAG size: 31 [2019-11-20 03:33:35,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:33:35,505 INFO L93 Difference]: Finished difference Result 125 states and 151 transitions. [2019-11-20 03:33:35,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-20 03:33:35,546 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 76 [2019-11-20 03:33:35,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:33:35,549 INFO L225 Difference]: With dead ends: 125 [2019-11-20 03:33:35,549 INFO L226 Difference]: Without dead ends: 114 [2019-11-20 03:33:35,550 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 123 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 186.3s TimeCoverageRelationStatistics Valid=282, Invalid=1521, Unknown=7, NotChecked=82, Total=1892 [2019-11-20 03:33:35,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-11-20 03:33:35,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 89. [2019-11-20 03:33:35,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-11-20 03:33:35,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 111 transitions. [2019-11-20 03:33:35,567 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 111 transitions. Word has length 76 [2019-11-20 03:33:35,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:33:35,568 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 111 transitions. [2019-11-20 03:33:35,568 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-20 03:33:35,568 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 111 transitions. [2019-11-20 03:33:35,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-20 03:33:35,570 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:33:35,570 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 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] [2019-11-20 03:33:35,775 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 03:33:35,775 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:33:35,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:33:35,776 INFO L82 PathProgramCache]: Analyzing trace with hash 653476761, now seen corresponding path program 2 times [2019-11-20 03:33:35,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 03:33:35,776 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1623018674] [2019-11-20 03:33:35,776 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d4bea82b-3bcb-4b9e-bef5-1c22022b70f5/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 03:33:36,465 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 03:33:36,465 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:33:36,471 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 79 conjunts are in the unsatisfiable core [2019-11-20 03:33:36,473 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:33:36,564 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 03:33:36,699 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 16 treesize of output 12 [2019-11-20 03:33:36,700 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 03:33:36,717 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 03:33:36,717 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 03:33:36,717 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:35 [2019-11-20 03:33:37,451 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2019-11-20 03:33:39,512 WARN L191 SmtUtils]: Spent 503.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2019-11-20 03:33:41,539 WARN L860 $PredicateComparison]: unable to prove that (exists ((downsweep_~tmp~0 (_ BitVec 32))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_downsweep_#in~a.base| (let ((.cse2 (bvadd (bvmul |c_downsweep_#in~left| (_ bv4 32)) |c_downsweep_#in~a.offset|))) (store (let ((.cse0 (select |c_old(#memory_int)| |c_downsweep_#in~a.base|)) (.cse1 (bvadd |c_downsweep_#in~a.offset| (bvmul |c_downsweep_#in~right| (_ bv4 32))))) (store .cse0 .cse1 (bvadd (select .cse0 .cse2) (select .cse0 .cse1)))) .cse2 downsweep_~tmp~0))))) is different from true [2019-11-20 03:33:43,653 WARN L860 $PredicateComparison]: unable to prove that (exists ((downsweep_~tmp~0 (_ BitVec 32))) (= (store |c_old(#memory_int)| |c_downsweep_#in~a.base| (let ((.cse9 (bvmul (bvneg (bvsdiv (bvadd (bvneg |c_downsweep_#in~left|) |c_downsweep_#in~right|) (_ bv2 32))) (_ bv4 32))) (.cse10 (bvmul |c_downsweep_#in~right| (_ bv4 32)))) (let ((.cse2 (bvadd .cse9 |c_downsweep_#in~a.offset| .cse10))) (store (let ((.cse1 (bvadd |c_downsweep_#in~a.offset| .cse10))) (let ((.cse0 (let ((.cse7 (select |c_old(#memory_int)| |c_downsweep_#in~a.base|)) (.cse8 (bvmul |c_downsweep_#in~left| (_ bv4 32)))) (let ((.cse6 (bvadd .cse9 .cse8 |c_downsweep_#in~a.offset|)) (.cse5 (select .cse7 .cse1))) (store (let ((.cse4 (bvadd .cse8 |c_downsweep_#in~a.offset|))) (let ((.cse3 (store .cse7 .cse1 (bvadd (select .cse7 .cse4) .cse5)))) (store .cse3 .cse4 (bvadd (select (store .cse3 .cse4 .cse5) .cse6) .cse5)))) .cse6 .cse5))))) (store .cse0 .cse1 (bvadd (select .cse0 .cse1) (select .cse0 .cse2))))) .cse2 downsweep_~tmp~0)))) |c_#memory_int|)) is different from true [2019-11-20 03:33:43,665 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 559 treesize of output 502 [2019-11-20 03:33:43,697 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 03:33:43,742 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 03:33:43,785 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 03:33:43,829 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 03:33:43,875 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 03:33:43,896 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 03:33:43,945 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 03:33:43,990 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 03:33:44,012 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 03:33:44,034 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 03:33:44,079 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 03:33:44,123 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 03:33:44,147 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 03:33:44,192 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 03:33:44,236 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 03:33:44,280 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 03:33:44,325 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 03:33:44,351 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 03:33:44,352 INFO L237 Elim1Store]: Index analysis took 226 ms [2019-11-20 03:33:44,354 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 185 treesize of output 89 [2019-11-20 03:33:44,355 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 03:33:44,808 WARN L191 SmtUtils]: Spent 452.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2019-11-20 03:33:44,808 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 03:33:44,809 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 03:33:45,207 WARN L191 SmtUtils]: Spent 397.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2019-11-20 03:33:45,207 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 03:33:45,208 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 03:33:45,208 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:581, output treesize:51 [2019-11-20 03:33:47,529 WARN L191 SmtUtils]: Spent 376.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2019-11-20 03:33:50,099 WARN L191 SmtUtils]: Spent 421.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2019-11-20 03:33:50,101 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 03:33:50,572 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 8 not checked. [2019-11-20 03:33:50,572 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 03:33:52,412 WARN L191 SmtUtils]: Spent 537.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2019-11-20 03:33:52,972 WARN L191 SmtUtils]: Spent 559.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2019-11-20 03:33:53,362 WARN L191 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2019-11-20 03:33:53,676 WARN L191 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2019-11-20 03:33:56,920 WARN L191 SmtUtils]: Spent 3.24 s on a formula simplification that was a NOOP. DAG size: 104 [2019-11-20 03:33:57,568 WARN L191 SmtUtils]: Spent 644.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2019-11-20 03:33:59,720 WARN L191 SmtUtils]: Spent 2.15 s on a formula simplification that was a NOOP. DAG size: 65 [2019-11-20 03:34:03,409 WARN L191 SmtUtils]: Spent 3.69 s on a formula simplification that was a NOOP. DAG size: 63 [2019-11-20 03:34:06,208 WARN L191 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2019-11-20 03:34:12,457 WARN L191 SmtUtils]: Spent 1.63 s on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2019-11-20 03:34:12,980 WARN L191 SmtUtils]: Spent 425.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2019-11-20 03:34:13,379 WARN L191 SmtUtils]: Spent 398.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2019-11-20 03:34:23,398 WARN L191 SmtUtils]: Spent 1.35 s on a formula simplification that was a NOOP. DAG size: 74 [2019-11-20 03:34:23,402 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 03:34:23,614 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 03:34:23,615 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Alternating quantifiers not yet supported at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:271) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimOneRec(ElimStorePlain.java:253) 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 03:34:23,619 INFO L168 Benchmark]: Toolchain (without parser) took 861153.26 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 160.4 MB). Free memory was 961.8 MB in the beginning and 1.0 GB in the end (delta: -49.4 MB). Peak memory consumption was 111.0 MB. Max. memory is 11.5 GB. [2019-11-20 03:34:23,619 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 987.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 03:34:23,620 INFO L168 Benchmark]: CACSL2BoogieTranslator took 247.76 ms. Allocated memory is still 1.0 GB. Free memory was 961.8 MB in the beginning and 945.7 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 11.5 GB. [2019-11-20 03:34:23,620 INFO L168 Benchmark]: Boogie Procedure Inliner took 89.30 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 145.8 MB). Free memory was 945.7 MB in the beginning and 1.1 GB in the end (delta: -190.2 MB). Peak memory consumption was 9.9 MB. Max. memory is 11.5 GB. [2019-11-20 03:34:23,620 INFO L168 Benchmark]: Boogie Preprocessor took 32.62 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 03:34:23,621 INFO L168 Benchmark]: RCFGBuilder took 428.10 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 31.2 MB). Peak memory consumption was 31.2 MB. Max. memory is 11.5 GB. [2019-11-20 03:34:23,621 INFO L168 Benchmark]: TraceAbstraction took 860351.75 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 14.7 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 93.5 MB). Peak memory consumption was 108.2 MB. Max. memory is 11.5 GB. [2019-11-20 03:34:23,624 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 987.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 247.76 ms. Allocated memory is still 1.0 GB. Free memory was 961.8 MB in the beginning and 945.7 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 89.30 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 145.8 MB). Free memory was 945.7 MB in the beginning and 1.1 GB in the end (delta: -190.2 MB). Peak memory consumption was 9.9 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 32.62 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 428.10 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 31.2 MB). Peak memory consumption was 31.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 860351.75 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 14.7 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 93.5 MB). Peak memory consumption was 108.2 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Alternating quantifiers not yet supported de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Alternating quantifiers not yet supported: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:271) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...