./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/s2if.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_f8972f5f-68a8-4f81-8a24-656a9049e5be/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_f8972f5f-68a8-4f81-8a24-656a9049e5be/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_f8972f5f-68a8-4f81-8a24-656a9049e5be/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_f8972f5f-68a8-4f81-8a24-656a9049e5be/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/s2if.c -s /tmp/vcloud-vcloud-master/worker/run_dir_f8972f5f-68a8-4f81-8a24-656a9049e5be/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_f8972f5f-68a8-4f81-8a24-656a9049e5be/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 e8598617cfb64d0ef5bf661838d245a9dbabbc61 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_f8972f5f-68a8-4f81-8a24-656a9049e5be/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_f8972f5f-68a8-4f81-8a24-656a9049e5be/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_f8972f5f-68a8-4f81-8a24-656a9049e5be/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_f8972f5f-68a8-4f81-8a24-656a9049e5be/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/s2if.c -s /tmp/vcloud-vcloud-master/worker/run_dir_f8972f5f-68a8-4f81-8a24-656a9049e5be/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_f8972f5f-68a8-4f81-8a24-656a9049e5be/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 e8598617cfb64d0ef5bf661838d245a9dbabbc61 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-678e011 [2019-11-20 05:54:44,196 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 05:54:44,199 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 05:54:44,211 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 05:54:44,211 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 05:54:44,213 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 05:54:44,214 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 05:54:44,217 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 05:54:44,220 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 05:54:44,221 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 05:54:44,222 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 05:54:44,224 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 05:54:44,224 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 05:54:44,225 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 05:54:44,226 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 05:54:44,228 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 05:54:44,229 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 05:54:44,230 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 05:54:44,233 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 05:54:44,235 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 05:54:44,237 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 05:54:44,238 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 05:54:44,240 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 05:54:44,240 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 05:54:44,243 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 05:54:44,244 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 05:54:44,244 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 05:54:44,245 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 05:54:44,245 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 05:54:44,246 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 05:54:44,247 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 05:54:44,247 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 05:54:44,248 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 05:54:44,249 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 05:54:44,250 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 05:54:44,250 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 05:54:44,251 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 05:54:44,251 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 05:54:44,251 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 05:54:44,252 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 05:54:44,253 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 05:54:44,254 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_f8972f5f-68a8-4f81-8a24-656a9049e5be/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-20 05:54:44,268 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 05:54:44,268 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 05:54:44,269 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 05:54:44,270 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 05:54:44,270 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 05:54:44,270 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 05:54:44,271 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 05:54:44,271 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 05:54:44,271 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 05:54:44,271 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 05:54:44,272 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-20 05:54:44,272 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 05:54:44,272 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-20 05:54:44,272 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 05:54:44,273 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 05:54:44,273 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 05:54:44,273 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-20 05:54:44,273 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 05:54:44,274 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 05:54:44,274 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 05:54:44,274 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 05:54:44,274 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 05:54:44,275 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 05:54:44,275 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 05:54:44,275 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-20 05:54:44,276 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-20 05:54:44,276 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-20 05:54:44,276 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-20 05:54:44,276 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_f8972f5f-68a8-4f81-8a24-656a9049e5be/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 -> e8598617cfb64d0ef5bf661838d245a9dbabbc61 [2019-11-20 05:54:44,441 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 05:54:44,453 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 05:54:44,457 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 05:54:44,459 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 05:54:44,459 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 05:54:44,460 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_f8972f5f-68a8-4f81-8a24-656a9049e5be/bin/uautomizer/../../sv-benchmarks/c/array-fpi/s2if.c [2019-11-20 05:54:44,521 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f8972f5f-68a8-4f81-8a24-656a9049e5be/bin/uautomizer/data/f6f980ec9/1ea28389edf84cb9a909e01b7fc82e71/FLAG1b8ccdba9 [2019-11-20 05:54:44,959 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 05:54:44,960 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_f8972f5f-68a8-4f81-8a24-656a9049e5be/sv-benchmarks/c/array-fpi/s2if.c [2019-11-20 05:54:44,968 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f8972f5f-68a8-4f81-8a24-656a9049e5be/bin/uautomizer/data/f6f980ec9/1ea28389edf84cb9a909e01b7fc82e71/FLAG1b8ccdba9 [2019-11-20 05:54:45,359 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_f8972f5f-68a8-4f81-8a24-656a9049e5be/bin/uautomizer/data/f6f980ec9/1ea28389edf84cb9a909e01b7fc82e71 [2019-11-20 05:54:45,364 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 05:54:45,366 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 05:54:45,369 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 05:54:45,369 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 05:54:45,373 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 05:54:45,374 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:54:45" (1/1) ... [2019-11-20 05:54:45,376 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@697eeb44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:54:45, skipping insertion in model container [2019-11-20 05:54:45,377 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:54:45" (1/1) ... [2019-11-20 05:54:45,385 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 05:54:45,411 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 05:54:45,753 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 05:54:45,764 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 05:54:45,803 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 05:54:45,822 INFO L192 MainTranslator]: Completed translation [2019-11-20 05:54:45,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:54:45 WrapperNode [2019-11-20 05:54:45,824 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 05:54:45,825 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 05:54:45,825 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 05:54:45,825 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 05:54:45,835 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:54:45" (1/1) ... [2019-11-20 05:54:45,846 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:54:45" (1/1) ... [2019-11-20 05:54:45,875 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 05:54:45,877 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 05:54:45,878 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 05:54:45,878 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 05:54:45,888 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:54:45" (1/1) ... [2019-11-20 05:54:45,889 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:54:45" (1/1) ... [2019-11-20 05:54:45,900 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:54:45" (1/1) ... [2019-11-20 05:54:45,901 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:54:45" (1/1) ... [2019-11-20 05:54:45,914 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:54:45" (1/1) ... [2019-11-20 05:54:45,924 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:54:45" (1/1) ... [2019-11-20 05:54:45,931 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:54:45" (1/1) ... [2019-11-20 05:54:45,933 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 05:54:45,934 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 05:54:45,935 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 05:54:45,935 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 05:54:45,936 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:54:45" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f8972f5f-68a8-4f81-8a24-656a9049e5be/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 05:54:46,023 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-20 05:54:46,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-20 05:54:46,024 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-20 05:54:46,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 05:54:46,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 05:54:46,025 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-20 05:54:46,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-20 05:54:46,433 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 05:54:46,433 INFO L285 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-20 05:54:46,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:54:46 BoogieIcfgContainer [2019-11-20 05:54:46,435 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 05:54:46,436 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 05:54:46,436 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 05:54:46,439 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 05:54:46,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:54:45" (1/3) ... [2019-11-20 05:54:46,440 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f2293a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:54:46, skipping insertion in model container [2019-11-20 05:54:46,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:54:45" (2/3) ... [2019-11-20 05:54:46,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f2293a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:54:46, skipping insertion in model container [2019-11-20 05:54:46,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:54:46" (3/3) ... [2019-11-20 05:54:46,443 INFO L109 eAbstractionObserver]: Analyzing ICFG s2if.c [2019-11-20 05:54:46,452 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 05:54:46,459 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-20 05:54:46,471 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-20 05:54:46,495 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 05:54:46,496 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-20 05:54:46,496 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 05:54:46,496 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 05:54:46,496 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 05:54:46,496 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 05:54:46,496 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 05:54:46,497 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 05:54:46,511 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-11-20 05:54:46,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-20 05:54:46,517 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:54:46,518 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:54:46,518 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:54:46,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:54:46,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1476218026, now seen corresponding path program 1 times [2019-11-20 05:54:46,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:54:46,534 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329331773] [2019-11-20 05:54:46,534 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:54:46,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:54:46,714 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 05:54:46,715 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329331773] [2019-11-20 05:54:46,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:54:46,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-20 05:54:46,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008405847] [2019-11-20 05:54:46,725 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-20 05:54:46,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:54:46,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-20 05:54:46,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-20 05:54:46,743 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2019-11-20 05:54:46,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:54:46,762 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2019-11-20 05:54:46,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-20 05:54:46,764 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2019-11-20 05:54:46,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:54:46,774 INFO L225 Difference]: With dead ends: 29 [2019-11-20 05:54:46,774 INFO L226 Difference]: Without dead ends: 13 [2019-11-20 05:54:46,778 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-20 05:54:46,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-11-20 05:54:46,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-11-20 05:54:46,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-20 05:54:46,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2019-11-20 05:54:46,815 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 9 [2019-11-20 05:54:46,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:54:46,816 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2019-11-20 05:54:46,816 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-20 05:54:46,816 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2019-11-20 05:54:46,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-20 05:54:46,817 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:54:46,817 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:54:46,817 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:54:46,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:54:46,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1304115419, now seen corresponding path program 1 times [2019-11-20 05:54:46,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:54:46,818 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851277140] [2019-11-20 05:54:46,819 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:54:46,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:54:46,891 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 05:54:46,892 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851277140] [2019-11-20 05:54:46,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:54:46,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-20 05:54:46,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576459018] [2019-11-20 05:54:46,893 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 05:54:46,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:54:46,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 05:54:46,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 05:54:46,894 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 3 states. [2019-11-20 05:54:46,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:54:46,952 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2019-11-20 05:54:46,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 05:54:46,953 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-20 05:54:46,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:54:46,953 INFO L225 Difference]: With dead ends: 23 [2019-11-20 05:54:46,953 INFO L226 Difference]: Without dead ends: 15 [2019-11-20 05:54:46,954 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 05:54:46,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-20 05:54:46,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2019-11-20 05:54:46,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-20 05:54:46,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2019-11-20 05:54:46,958 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9 [2019-11-20 05:54:46,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:54:46,959 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2019-11-20 05:54:46,959 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 05:54:46,959 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2019-11-20 05:54:46,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-20 05:54:46,960 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:54:46,960 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:54:46,960 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:54:46,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:54:46,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1358761923, now seen corresponding path program 1 times [2019-11-20 05:54:46,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:54:46,961 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630939005] [2019-11-20 05:54:46,961 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:54:46,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:54:47,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 05:54:47,050 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630939005] [2019-11-20 05:54:47,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:54:47,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-20 05:54:47,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401896170] [2019-11-20 05:54:47,051 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 05:54:47,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:54:47,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 05:54:47,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-20 05:54:47,052 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 4 states. [2019-11-20 05:54:47,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:54:47,162 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2019-11-20 05:54:47,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-20 05:54:47,163 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-11-20 05:54:47,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:54:47,164 INFO L225 Difference]: With dead ends: 22 [2019-11-20 05:54:47,164 INFO L226 Difference]: Without dead ends: 18 [2019-11-20 05:54:47,164 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-20 05:54:47,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-20 05:54:47,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 15. [2019-11-20 05:54:47,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-20 05:54:47,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2019-11-20 05:54:47,168 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2019-11-20 05:54:47,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:54:47,168 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2019-11-20 05:54:47,168 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 05:54:47,169 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2019-11-20 05:54:47,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-20 05:54:47,169 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:54:47,169 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:54:47,170 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:54:47,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:54:47,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1565637502, now seen corresponding path program 1 times [2019-11-20 05:54:47,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:54:47,170 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824407380] [2019-11-20 05:54:47,171 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:54:47,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:54:47,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:54:47,597 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824407380] [2019-11-20 05:54:47,598 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210986733] [2019-11-20 05:54:47,598 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f8972f5f-68a8-4f81-8a24-656a9049e5be/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:54:47,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:54:47,665 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-20 05:54:47,671 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:54:47,737 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-20 05:54:47,739 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:54:47,754 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:54:47,763 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-20 05:54:47,763 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 05:54:47,775 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:54:47,775 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 05:54:47,776 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:30, output treesize:22 [2019-11-20 05:54:47,859 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 23 treesize of output 22 [2019-11-20 05:54:47,859 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:54:47,880 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:54:47,881 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:54:47,881 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2019-11-20 05:54:48,140 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:54:48,140 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 57 [2019-11-20 05:54:48,142 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:54:48,184 INFO L567 ElimStorePlain]: treesize reduction 32, result has 62.4 percent of original size [2019-11-20 05:54:48,186 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-11-20 05:54:48,186 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:70, output treesize:53 [2019-11-20 05:54:48,249 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:54:48,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:54:48,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:54:48,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2019-11-20 05:54:48,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834466400] [2019-11-20 05:54:48,309 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-20 05:54:48,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:54:48,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-20 05:54:48,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2019-11-20 05:54:48,310 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 15 states. [2019-11-20 05:54:48,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:54:48,890 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2019-11-20 05:54:48,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 05:54:48,891 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 14 [2019-11-20 05:54:48,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:54:48,894 INFO L225 Difference]: With dead ends: 33 [2019-11-20 05:54:48,894 INFO L226 Difference]: Without dead ends: 24 [2019-11-20 05:54:48,895 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2019-11-20 05:54:48,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-20 05:54:48,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2019-11-20 05:54:48,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-20 05:54:48,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2019-11-20 05:54:48,912 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 14 [2019-11-20 05:54:48,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:54:48,914 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2019-11-20 05:54:48,914 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-20 05:54:48,914 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2019-11-20 05:54:48,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-20 05:54:48,916 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:54:48,916 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:54:49,121 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:54:49,125 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:54:49,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:54:49,126 INFO L82 PathProgramCache]: Analyzing trace with hash -472130976, now seen corresponding path program 2 times [2019-11-20 05:54:49,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:54:49,126 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534099518] [2019-11-20 05:54:49,126 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:54:49,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:54:49,250 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:54:49,251 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534099518] [2019-11-20 05:54:49,251 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175651669] [2019-11-20 05:54:49,251 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f8972f5f-68a8-4f81-8a24-656a9049e5be/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:54:49,295 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 05:54:49,296 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 05:54:49,297 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 05:54:49,299 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:54:49,360 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:54:49,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:54:49,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2019-11-20 05:54:49,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987953280] [2019-11-20 05:54:49,361 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 05:54:49,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:54:49,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 05:54:49,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-20 05:54:49,362 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 10 states. [2019-11-20 05:54:49,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:54:49,588 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-11-20 05:54:49,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-20 05:54:49,589 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2019-11-20 05:54:49,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:54:49,590 INFO L225 Difference]: With dead ends: 31 [2019-11-20 05:54:49,590 INFO L226 Difference]: Without dead ends: 27 [2019-11-20 05:54:49,591 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2019-11-20 05:54:49,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-20 05:54:49,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2019-11-20 05:54:49,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-20 05:54:49,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2019-11-20 05:54:49,598 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 16 [2019-11-20 05:54:49,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:54:49,599 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2019-11-20 05:54:49,599 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 05:54:49,599 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2019-11-20 05:54:49,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-20 05:54:49,600 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:54:49,600 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:54:49,801 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:54:49,801 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:54:49,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:54:49,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1317941731, now seen corresponding path program 3 times [2019-11-20 05:54:49,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:54:49,802 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797114710] [2019-11-20 05:54:49,802 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:54:49,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:54:49,873 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:54:49,873 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797114710] [2019-11-20 05:54:49,874 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192019229] [2019-11-20 05:54:49,874 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f8972f5f-68a8-4f81-8a24-656a9049e5be/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:54:49,935 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-20 05:54:49,936 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 05:54:49,937 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 05:54:49,939 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:54:49,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:54:49,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:54:49,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2019-11-20 05:54:49,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642547174] [2019-11-20 05:54:49,988 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 05:54:49,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:54:49,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 05:54:49,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-11-20 05:54:49,989 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 10 states. [2019-11-20 05:54:50,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:54:50,104 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2019-11-20 05:54:50,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-20 05:54:50,105 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2019-11-20 05:54:50,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:54:50,106 INFO L225 Difference]: With dead ends: 35 [2019-11-20 05:54:50,106 INFO L226 Difference]: Without dead ends: 23 [2019-11-20 05:54:50,107 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-20 05:54:50,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-20 05:54:50,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2019-11-20 05:54:50,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-20 05:54:50,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2019-11-20 05:54:50,111 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 17 [2019-11-20 05:54:50,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:54:50,111 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2019-11-20 05:54:50,111 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 05:54:50,111 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2019-11-20 05:54:50,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-20 05:54:50,112 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:54:50,112 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:54:50,317 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:54:50,318 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:54:50,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:54:50,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1991965825, now seen corresponding path program 4 times [2019-11-20 05:54:50,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:54:50,319 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528229156] [2019-11-20 05:54:50,319 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:54:50,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:54:50,961 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:54:50,961 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528229156] [2019-11-20 05:54:50,961 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572519039] [2019-11-20 05:54:50,962 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f8972f5f-68a8-4f81-8a24-656a9049e5be/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:54:51,018 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 05:54:51,018 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 05:54:51,020 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2019-11-20 05:54:51,022 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:54:51,033 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-20 05:54:51,034 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:54:51,044 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:54:51,049 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-20 05:54:51,050 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 05:54:51,063 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:54:51,063 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 05:54:51,064 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2019-11-20 05:54:51,099 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 23 treesize of output 22 [2019-11-20 05:54:51,100 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:54:51,114 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:54:51,114 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:54:51,114 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:29 [2019-11-20 05:54:51,231 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:54:51,231 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 1 case distinctions, treesize of input 34 treesize of output 72 [2019-11-20 05:54:51,233 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:54:51,278 INFO L567 ElimStorePlain]: treesize reduction 36, result has 55.6 percent of original size [2019-11-20 05:54:51,279 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 05:54:51,279 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:45 [2019-11-20 05:54:51,580 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:54:51,581 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 103 [2019-11-20 05:54:51,582 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:54:51,625 INFO L567 ElimStorePlain]: treesize reduction 80, result has 46.3 percent of original size [2019-11-20 05:54:51,626 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 05:54:51,626 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:86, output treesize:69 [2019-11-20 05:54:51,938 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:54:51,939 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 85 treesize of output 165 [2019-11-20 05:54:51,945 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:54:52,017 INFO L567 ElimStorePlain]: treesize reduction 214, result has 26.2 percent of original size [2019-11-20 05:54:52,018 INFO L496 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-11-20 05:54:52,018 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:113, output treesize:76 [2019-11-20 05:54:52,085 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:54:52,157 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:54:52,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:54:52,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2019-11-20 05:54:52,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755359107] [2019-11-20 05:54:52,159 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-20 05:54:52,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:54:52,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-20 05:54:52,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2019-11-20 05:54:52,160 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 27 states. [2019-11-20 05:54:53,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:54:53,297 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2019-11-20 05:54:53,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-20 05:54:53,297 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 19 [2019-11-20 05:54:53,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:54:53,298 INFO L225 Difference]: With dead ends: 43 [2019-11-20 05:54:53,298 INFO L226 Difference]: Without dead ends: 32 [2019-11-20 05:54:53,299 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=180, Invalid=1302, Unknown=0, NotChecked=0, Total=1482 [2019-11-20 05:54:53,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-20 05:54:53,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2019-11-20 05:54:53,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-20 05:54:53,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-11-20 05:54:53,305 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 19 [2019-11-20 05:54:53,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:54:53,306 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-11-20 05:54:53,306 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-20 05:54:53,306 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-11-20 05:54:53,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-20 05:54:53,307 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:54:53,307 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:54:53,511 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:54:53,512 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:54:53,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:54:53,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1189058463, now seen corresponding path program 5 times [2019-11-20 05:54:53,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:54:53,513 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089715559] [2019-11-20 05:54:53,513 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:54:53,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:54:53,612 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:54:53,612 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089715559] [2019-11-20 05:54:53,612 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505142752] [2019-11-20 05:54:53,613 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f8972f5f-68a8-4f81-8a24-656a9049e5be/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:54:53,654 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-20 05:54:53,655 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 05:54:53,655 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 05:54:53,657 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:54:53,751 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:54:53,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:54:53,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2019-11-20 05:54:53,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702520371] [2019-11-20 05:54:53,753 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-20 05:54:53,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:54:53,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-20 05:54:53,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2019-11-20 05:54:53,754 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 13 states. [2019-11-20 05:54:54,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:54:54,044 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2019-11-20 05:54:54,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-20 05:54:54,046 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2019-11-20 05:54:54,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:54:54,046 INFO L225 Difference]: With dead ends: 39 [2019-11-20 05:54:54,047 INFO L226 Difference]: Without dead ends: 35 [2019-11-20 05:54:54,047 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2019-11-20 05:54:54,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-20 05:54:54,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2019-11-20 05:54:54,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-20 05:54:54,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2019-11-20 05:54:54,067 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 21 [2019-11-20 05:54:54,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:54:54,067 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2019-11-20 05:54:54,067 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-20 05:54:54,068 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2019-11-20 05:54:54,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-20 05:54:54,069 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:54:54,069 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:54:54,273 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:54:54,273 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:54:54,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:54:54,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1846717952, now seen corresponding path program 6 times [2019-11-20 05:54:54,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:54:54,274 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750694927] [2019-11-20 05:54:54,274 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:54:54,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:54:54,365 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:54:54,365 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750694927] [2019-11-20 05:54:54,365 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334228768] [2019-11-20 05:54:54,365 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f8972f5f-68a8-4f81-8a24-656a9049e5be/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:54:54,411 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-11-20 05:54:54,412 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 05:54:54,413 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 05:54:54,414 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:54:54,468 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:54:54,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:54:54,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2019-11-20 05:54:54,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235329598] [2019-11-20 05:54:54,469 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-20 05:54:54,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:54:54,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-20 05:54:54,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2019-11-20 05:54:54,470 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 13 states. [2019-11-20 05:54:54,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:54:54,632 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2019-11-20 05:54:54,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-20 05:54:54,633 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 22 [2019-11-20 05:54:54,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:54:54,634 INFO L225 Difference]: With dead ends: 43 [2019-11-20 05:54:54,634 INFO L226 Difference]: Without dead ends: 28 [2019-11-20 05:54:54,634 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-11-20 05:54:54,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-20 05:54:54,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2019-11-20 05:54:54,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-20 05:54:54,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2019-11-20 05:54:54,639 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2019-11-20 05:54:54,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:54:54,639 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2019-11-20 05:54:54,639 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-20 05:54:54,639 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2019-11-20 05:54:54,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-20 05:54:54,640 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:54:54,640 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:54:54,844 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:54:54,845 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:54:54,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:54:54,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1106368034, now seen corresponding path program 7 times [2019-11-20 05:54:54,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:54:54,846 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472794309] [2019-11-20 05:54:54,846 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:54:54,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:54:55,390 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:54:55,390 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472794309] [2019-11-20 05:54:55,390 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990089351] [2019-11-20 05:54:55,390 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f8972f5f-68a8-4f81-8a24-656a9049e5be/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:54:55,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:54:55,432 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 41 conjunts are in the unsatisfiable core [2019-11-20 05:54:55,434 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:54:55,445 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-20 05:54:55,445 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:54:55,453 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:54:55,463 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-20 05:54:55,463 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 05:54:55,470 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:54:55,471 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 05:54:55,471 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2019-11-20 05:54:55,504 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 23 treesize of output 22 [2019-11-20 05:54:55,504 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:54:55,512 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:54:55,513 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:54:55,513 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:29 [2019-11-20 05:54:55,594 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:54:55,594 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 1 case distinctions, treesize of input 30 treesize of output 56 [2019-11-20 05:54:55,594 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:54:55,616 INFO L567 ElimStorePlain]: treesize reduction 24, result has 60.0 percent of original size [2019-11-20 05:54:55,616 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:54:55,617 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:36 [2019-11-20 05:54:55,717 INFO L343 Elim1Store]: treesize reduction 10, result has 87.7 percent of original size [2019-11-20 05:54:55,717 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 98 [2019-11-20 05:54:55,718 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:54:55,752 INFO L567 ElimStorePlain]: treesize reduction 54, result has 47.1 percent of original size [2019-11-20 05:54:55,752 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:54:55,752 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:52, output treesize:48 [2019-11-20 05:54:55,948 INFO L343 Elim1Store]: treesize reduction 32, result has 56.2 percent of original size [2019-11-20 05:54:55,948 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 101 [2019-11-20 05:54:55,950 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:54:55,993 INFO L567 ElimStorePlain]: treesize reduction 64, result has 47.5 percent of original size [2019-11-20 05:54:55,994 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 05:54:55,994 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:79, output treesize:58 [2019-11-20 05:54:56,902 WARN L191 SmtUtils]: Spent 879.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2019-11-20 05:54:57,429 WARN L191 SmtUtils]: Spent 436.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2019-11-20 05:54:57,493 INFO L343 Elim1Store]: treesize reduction 32, result has 75.2 percent of original size [2019-11-20 05:54:57,493 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 84 treesize of output 171 [2019-11-20 05:54:57,495 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:54:57,536 INFO L567 ElimStorePlain]: treesize reduction 114, result has 39.7 percent of original size [2019-11-20 05:54:57,537 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 05:54:57,537 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:94, output treesize:75 [2019-11-20 05:54:59,594 WARN L191 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 41 [2019-11-20 05:55:00,144 WARN L191 SmtUtils]: Spent 494.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2019-11-20 05:55:00,324 WARN L191 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 69 [2019-11-20 05:55:00,324 INFO L343 Elim1Store]: treesize reduction 32, result has 84.1 percent of original size [2019-11-20 05:55:00,324 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 101 treesize of output 259 [2019-11-20 05:55:00,326 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:55:00,388 INFO L567 ElimStorePlain]: treesize reduction 208, result has 29.3 percent of original size [2019-11-20 05:55:00,389 INFO L496 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-11-20 05:55:00,389 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:111, output treesize:86 [2019-11-20 05:55:00,481 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:55:00,558 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:55:00,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:55:00,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2019-11-20 05:55:00,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114854686] [2019-11-20 05:55:00,563 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-20 05:55:00,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:55:00,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-20 05:55:00,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2019-11-20 05:55:00,565 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 33 states. [2019-11-20 05:55:01,878 WARN L191 SmtUtils]: Spent 903.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2019-11-20 05:55:02,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:55:02,401 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2019-11-20 05:55:02,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-20 05:55:02,401 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 24 [2019-11-20 05:55:02,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:55:02,402 INFO L225 Difference]: With dead ends: 56 [2019-11-20 05:55:02,402 INFO L226 Difference]: Without dead ends: 42 [2019-11-20 05:55:02,403 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=163, Invalid=1397, Unknown=0, NotChecked=0, Total=1560 [2019-11-20 05:55:02,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-20 05:55:02,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2019-11-20 05:55:02,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-20 05:55:02,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2019-11-20 05:55:02,411 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 24 [2019-11-20 05:55:02,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:55:02,411 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2019-11-20 05:55:02,412 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-20 05:55:02,412 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2019-11-20 05:55:02,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-20 05:55:02,413 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:55:02,413 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:55:02,621 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:55:02,621 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:55:02,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:55:02,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1049109732, now seen corresponding path program 1 times [2019-11-20 05:55:02,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:55:02,622 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105494574] [2019-11-20 05:55:02,622 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:55:02,646 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-20 05:55:02,646 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [72335741] [2019-11-20 05:55:02,646 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f8972f5f-68a8-4f81-8a24-656a9049e5be/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:55:02,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:55:02,696 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-20 05:55:02,697 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:55:02,703 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-20 05:55:02,703 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:55:02,706 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:55:02,707 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:55:02,707 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2019-11-20 05:55:02,727 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-11-20 05:55:02,727 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:55:02,730 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:55:02,731 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:55:02,731 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2019-11-20 05:55:02,756 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:55:02,757 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 47 [2019-11-20 05:55:02,757 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:55:02,767 INFO L567 ElimStorePlain]: treesize reduction 22, result has 43.6 percent of original size [2019-11-20 05:55:02,767 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:55:02,767 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:17 [2019-11-20 05:55:02,789 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:55:02,789 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 47 [2019-11-20 05:55:02,790 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:55:02,799 INFO L567 ElimStorePlain]: treesize reduction 28, result has 37.8 percent of original size [2019-11-20 05:55:02,799 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:55:02,800 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:13 [2019-11-20 05:55:02,821 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2019-11-20 05:55:02,821 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:55:02,822 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:55:02,823 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:55:02,823 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2019-11-20 05:55:02,832 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:55:02,833 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105494574] [2019-11-20 05:55:02,833 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-20 05:55:02,833 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72335741] [2019-11-20 05:55:02,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-20 05:55:02,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-11-20 05:55:02,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961109777] [2019-11-20 05:55:02,833 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-20 05:55:02,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:55:02,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-20 05:55:02,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-11-20 05:55:02,834 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand 11 states. [2019-11-20 05:55:03,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:55:03,004 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2019-11-20 05:55:03,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 05:55:03,006 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2019-11-20 05:55:03,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:55:03,007 INFO L225 Difference]: With dead ends: 47 [2019-11-20 05:55:03,007 INFO L226 Difference]: Without dead ends: 40 [2019-11-20 05:55:03,008 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2019-11-20 05:55:03,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-20 05:55:03,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2019-11-20 05:55:03,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-20 05:55:03,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2019-11-20 05:55:03,016 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 24 [2019-11-20 05:55:03,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:55:03,017 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2019-11-20 05:55:03,017 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-20 05:55:03,017 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2019-11-20 05:55:03,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-20 05:55:03,023 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:55:03,023 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:55:03,234 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:55:03,234 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:55:03,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:55:03,234 INFO L82 PathProgramCache]: Analyzing trace with hash -426309664, now seen corresponding path program 2 times [2019-11-20 05:55:03,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:55:03,235 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904390982] [2019-11-20 05:55:03,235 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:55:03,256 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-20 05:55:03,256 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [216748565] [2019-11-20 05:55:03,256 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f8972f5f-68a8-4f81-8a24-656a9049e5be/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:55:03,326 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 05:55:03,327 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 05:55:03,328 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-20 05:55:03,329 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:55:03,349 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 15 treesize of output 11 [2019-11-20 05:55:03,349 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:55:03,357 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:55:03,357 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:55:03,357 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2019-11-20 05:55:03,387 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:55:03,389 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 25 treesize of output 24 [2019-11-20 05:55:03,389 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:55:03,398 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:55:03,399 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 05:55:03,399 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:32 [2019-11-20 05:55:03,462 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:55:03,463 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:55:03,464 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:55:03,469 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:55:03,471 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 47 [2019-11-20 05:55:03,471 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:55:03,482 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:55:03,483 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 05:55:03,483 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:60, output treesize:30 [2019-11-20 05:55:03,529 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:55:03,530 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:55:03,530 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2019-11-20 05:55:03,531 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:55:03,535 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:55:03,535 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:55:03,536 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:3 [2019-11-20 05:55:03,550 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-20 05:55:03,551 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904390982] [2019-11-20 05:55:03,551 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-20 05:55:03,551 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216748565] [2019-11-20 05:55:03,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-20 05:55:03,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-11-20 05:55:03,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578549376] [2019-11-20 05:55:03,552 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-20 05:55:03,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:55:03,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-20 05:55:03,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2019-11-20 05:55:03,552 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 11 states. [2019-11-20 05:55:04,271 WARN L191 SmtUtils]: Spent 611.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 22 [2019-11-20 05:55:04,722 WARN L191 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 24 [2019-11-20 05:55:04,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:55:04,774 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2019-11-20 05:55:04,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 05:55:04,774 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2019-11-20 05:55:04,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:55:04,775 INFO L225 Difference]: With dead ends: 49 [2019-11-20 05:55:04,775 INFO L226 Difference]: Without dead ends: 39 [2019-11-20 05:55:04,776 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2019-11-20 05:55:04,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-20 05:55:04,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-11-20 05:55:04,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-20 05:55:04,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2019-11-20 05:55:04,785 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 24 [2019-11-20 05:55:04,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:55:04,785 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2019-11-20 05:55:04,785 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-20 05:55:04,786 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2019-11-20 05:55:04,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-20 05:55:04,787 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:55:04,787 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:55:04,990 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:55:04,990 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:55:04,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:55:04,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1700299324, now seen corresponding path program 8 times [2019-11-20 05:55:04,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:55:04,991 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707861995] [2019-11-20 05:55:04,991 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:55:05,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:55:05,109 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:55:05,110 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707861995] [2019-11-20 05:55:05,110 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756073349] [2019-11-20 05:55:05,110 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f8972f5f-68a8-4f81-8a24-656a9049e5be/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:55:05,147 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 05:55:05,147 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 05:55:05,148 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 05:55:05,150 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:55:05,217 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:55:05,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:55:05,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2019-11-20 05:55:05,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441224761] [2019-11-20 05:55:05,219 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-20 05:55:05,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:55:05,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-20 05:55:05,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-11-20 05:55:05,219 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 16 states. [2019-11-20 05:55:05,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:55:05,532 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2019-11-20 05:55:05,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-20 05:55:05,533 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 26 [2019-11-20 05:55:05,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:55:05,533 INFO L225 Difference]: With dead ends: 47 [2019-11-20 05:55:05,534 INFO L226 Difference]: Without dead ends: 43 [2019-11-20 05:55:05,534 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2019-11-20 05:55:05,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-20 05:55:05,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2019-11-20 05:55:05,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-20 05:55:05,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-11-20 05:55:05,545 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 26 [2019-11-20 05:55:05,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:55:05,545 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-11-20 05:55:05,545 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-20 05:55:05,545 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-11-20 05:55:05,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-20 05:55:05,546 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:55:05,546 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:55:05,746 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:55:05,747 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:55:05,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:55:05,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1307941697, now seen corresponding path program 9 times [2019-11-20 05:55:05,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:55:05,747 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588267267] [2019-11-20 05:55:05,748 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:55:05,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:55:05,848 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:55:05,849 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588267267] [2019-11-20 05:55:05,849 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799818143] [2019-11-20 05:55:05,849 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f8972f5f-68a8-4f81-8a24-656a9049e5be/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:55:05,893 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-20 05:55:05,893 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 05:55:05,894 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 05:55:05,895 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:55:05,975 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:55:05,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:55:05,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2019-11-20 05:55:05,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124801693] [2019-11-20 05:55:05,975 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-20 05:55:05,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:55:05,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-20 05:55:05,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-11-20 05:55:05,976 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 16 states. [2019-11-20 05:55:06,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:55:06,175 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2019-11-20 05:55:06,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-20 05:55:06,176 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 27 [2019-11-20 05:55:06,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:55:06,177 INFO L225 Difference]: With dead ends: 51 [2019-11-20 05:55:06,177 INFO L226 Difference]: Without dead ends: 33 [2019-11-20 05:55:06,177 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2019-11-20 05:55:06,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-20 05:55:06,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2019-11-20 05:55:06,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-20 05:55:06,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2019-11-20 05:55:06,183 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 27 [2019-11-20 05:55:06,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:55:06,183 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2019-11-20 05:55:06,183 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-20 05:55:06,183 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2019-11-20 05:55:06,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-20 05:55:06,184 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:55:06,184 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:55:06,385 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:55:06,385 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:55:06,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:55:06,386 INFO L82 PathProgramCache]: Analyzing trace with hash 311885347, now seen corresponding path program 10 times [2019-11-20 05:55:06,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:55:06,386 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849115037] [2019-11-20 05:55:06,386 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:55:06,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:55:07,544 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:55:07,544 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849115037] [2019-11-20 05:55:07,544 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840549500] [2019-11-20 05:55:07,545 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f8972f5f-68a8-4f81-8a24-656a9049e5be/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:55:07,614 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 05:55:07,614 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 05:55:07,616 WARN L253 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 49 conjunts are in the unsatisfiable core [2019-11-20 05:55:07,619 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:55:07,638 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-20 05:55:07,638 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:55:07,653 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:55:07,659 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-20 05:55:07,660 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 05:55:07,667 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:55:07,667 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 05:55:07,667 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2019-11-20 05:55:07,701 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 23 treesize of output 22 [2019-11-20 05:55:07,701 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:55:07,710 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:55:07,711 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:55:07,711 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:29 [2019-11-20 05:55:07,804 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:55:07,805 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 1 case distinctions, treesize of input 34 treesize of output 72 [2019-11-20 05:55:07,805 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:55:07,837 INFO L567 ElimStorePlain]: treesize reduction 36, result has 55.6 percent of original size [2019-11-20 05:55:07,838 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 05:55:07,838 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:45 [2019-11-20 05:55:07,978 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:55:07,979 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 138 [2019-11-20 05:55:07,980 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:55:08,023 INFO L567 ElimStorePlain]: treesize reduction 72, result has 45.9 percent of original size [2019-11-20 05:55:08,024 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 05:55:08,024 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:65, output treesize:61 [2019-11-20 05:55:08,206 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:55:08,206 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 220 [2019-11-20 05:55:08,207 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:55:08,267 INFO L567 ElimStorePlain]: treesize reduction 108, result has 41.6 percent of original size [2019-11-20 05:55:08,268 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-11-20 05:55:08,268 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:77 [2019-11-20 05:55:08,736 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:55:08,736 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 88 treesize of output 243 [2019-11-20 05:55:08,737 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:55:08,807 INFO L567 ElimStorePlain]: treesize reduction 176, result has 36.5 percent of original size [2019-11-20 05:55:08,807 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-11-20 05:55:08,808 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:118, output treesize:101 [2019-11-20 05:55:09,199 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:55:09,199 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 107 treesize of output 337 [2019-11-20 05:55:09,202 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:55:09,330 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 61 [2019-11-20 05:55:09,330 INFO L567 ElimStorePlain]: treesize reduction 515, result has 20.5 percent of original size [2019-11-20 05:55:09,331 INFO L496 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-11-20 05:55:09,331 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:142, output treesize:133 [2019-11-20 05:55:09,922 WARN L191 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2019-11-20 05:55:09,922 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:55:09,923 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 134 treesize of output 451 [2019-11-20 05:55:09,925 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:55:10,117 WARN L191 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 67 [2019-11-20 05:55:10,117 INFO L567 ElimStorePlain]: treesize reduction 384, result has 26.0 percent of original size [2019-11-20 05:55:10,119 INFO L496 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-11-20 05:55:10,119 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:174, output treesize:135 [2019-11-20 05:55:10,909 WARN L191 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2019-11-20 05:55:10,909 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:55:10,910 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 131 treesize of output 575 [2019-11-20 05:55:10,914 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:55:11,118 WARN L191 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 60 [2019-11-20 05:55:11,118 INFO L567 ElimStorePlain]: treesize reduction 724, result has 13.2 percent of original size [2019-11-20 05:55:11,282 INFO L496 ElimStorePlain]: Start of recursive call 1: 10 dim-0 vars, 1 dim-2 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-11-20 05:55:11,282 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 11 variables, input treesize:179, output treesize:92 [2019-11-20 05:55:11,397 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:55:11,607 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:55:11,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:55:11,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 25] total 44 [2019-11-20 05:55:11,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79423506] [2019-11-20 05:55:11,610 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-11-20 05:55:11,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:55:11,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-11-20 05:55:11,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1757, Unknown=0, NotChecked=0, Total=1892 [2019-11-20 05:55:11,612 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 44 states. [2019-11-20 05:55:13,956 WARN L191 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2019-11-20 05:55:14,630 WARN L191 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2019-11-20 05:55:15,744 WARN L191 SmtUtils]: Spent 576.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 74 [2019-11-20 05:55:16,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:55:16,289 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2019-11-20 05:55:16,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-20 05:55:16,289 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 29 [2019-11-20 05:55:16,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:55:16,290 INFO L225 Difference]: With dead ends: 65 [2019-11-20 05:55:16,290 INFO L226 Difference]: Without dead ends: 48 [2019-11-20 05:55:16,291 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 7 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 962 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=341, Invalid=3819, Unknown=0, NotChecked=0, Total=4160 [2019-11-20 05:55:16,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-20 05:55:16,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2019-11-20 05:55:16,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-20 05:55:16,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2019-11-20 05:55:16,297 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 29 [2019-11-20 05:55:16,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:55:16,297 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2019-11-20 05:55:16,298 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-11-20 05:55:16,298 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2019-11-20 05:55:16,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-20 05:55:16,298 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:55:16,298 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:55:16,498 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:55:16,499 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:55:16,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:55:16,499 INFO L82 PathProgramCache]: Analyzing trace with hash 879440005, now seen corresponding path program 11 times [2019-11-20 05:55:16,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:55:16,499 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286548889] [2019-11-20 05:55:16,499 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:55:16,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:55:16,633 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 9 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:55:16,633 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286548889] [2019-11-20 05:55:16,634 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171877891] [2019-11-20 05:55:16,634 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f8972f5f-68a8-4f81-8a24-656a9049e5be/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:55:16,690 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-20 05:55:16,690 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 05:55:16,691 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-20 05:55:16,693 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:55:16,796 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:55:16,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:55:16,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2019-11-20 05:55:16,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512538126] [2019-11-20 05:55:16,797 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-20 05:55:16,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:55:16,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-20 05:55:16,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2019-11-20 05:55:16,797 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 19 states. [2019-11-20 05:55:17,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:55:17,141 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2019-11-20 05:55:17,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-20 05:55:17,141 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 31 [2019-11-20 05:55:17,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:55:17,142 INFO L225 Difference]: With dead ends: 55 [2019-11-20 05:55:17,142 INFO L226 Difference]: Without dead ends: 51 [2019-11-20 05:55:17,143 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=614, Unknown=0, NotChecked=0, Total=812 [2019-11-20 05:55:17,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-20 05:55:17,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2019-11-20 05:55:17,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-20 05:55:17,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2019-11-20 05:55:17,151 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 31 [2019-11-20 05:55:17,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:55:17,152 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2019-11-20 05:55:17,152 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-20 05:55:17,152 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2019-11-20 05:55:17,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-20 05:55:17,153 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:55:17,153 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:55:17,356 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:55:17,356 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:55:17,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:55:17,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1393842980, now seen corresponding path program 12 times [2019-11-20 05:55:17,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:55:17,356 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407662516] [2019-11-20 05:55:17,356 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:55:17,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:55:17,455 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:55:17,456 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407662516] [2019-11-20 05:55:17,456 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855761673] [2019-11-20 05:55:17,456 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f8972f5f-68a8-4f81-8a24-656a9049e5be/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:55:17,509 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-11-20 05:55:17,509 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 05:55:17,510 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-20 05:55:17,514 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:55:17,625 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 35 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:55:17,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:55:17,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2019-11-20 05:55:17,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280367778] [2019-11-20 05:55:17,626 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-20 05:55:17,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:55:17,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-20 05:55:17,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2019-11-20 05:55:17,627 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand 19 states. [2019-11-20 05:55:17,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:55:17,789 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2019-11-20 05:55:17,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-20 05:55:17,789 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 32 [2019-11-20 05:55:17,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:55:17,790 INFO L225 Difference]: With dead ends: 59 [2019-11-20 05:55:17,790 INFO L226 Difference]: Without dead ends: 38 [2019-11-20 05:55:17,790 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2019-11-20 05:55:17,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-20 05:55:17,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2019-11-20 05:55:17,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-20 05:55:17,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2019-11-20 05:55:17,797 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 32 [2019-11-20 05:55:17,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:55:17,797 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2019-11-20 05:55:17,797 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-20 05:55:17,798 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2019-11-20 05:55:17,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-20 05:55:17,798 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:55:17,799 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:55:18,005 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:55:18,005 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:55:18,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:55:18,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1635696442, now seen corresponding path program 13 times [2019-11-20 05:55:18,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:55:18,006 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446204112] [2019-11-20 05:55:18,006 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:55:18,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:55:18,919 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:55:18,919 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446204112] [2019-11-20 05:55:18,919 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4585631] [2019-11-20 05:55:18,919 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f8972f5f-68a8-4f81-8a24-656a9049e5be/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:55:18,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:55:18,961 WARN L253 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 57 conjunts are in the unsatisfiable core [2019-11-20 05:55:18,963 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:55:18,967 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-20 05:55:18,968 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:55:18,974 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:55:18,977 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-20 05:55:18,977 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 05:55:18,983 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:55:18,983 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 05:55:18,984 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2019-11-20 05:55:19,016 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 23 treesize of output 22 [2019-11-20 05:55:19,016 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:55:19,023 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:55:19,024 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:55:19,024 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:29 [2019-11-20 05:55:19,103 INFO L343 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2019-11-20 05:55:19,103 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 1 case distinctions, treesize of input 35 treesize of output 37 [2019-11-20 05:55:19,104 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:55:19,113 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:55:19,113 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:55:19,113 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:41 [2019-11-20 05:55:19,226 INFO L343 Elim1Store]: treesize reduction 10, result has 87.7 percent of original size [2019-11-20 05:55:19,226 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 98 [2019-11-20 05:55:19,226 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:55:19,256 INFO L567 ElimStorePlain]: treesize reduction 54, result has 45.5 percent of original size [2019-11-20 05:55:19,256 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:55:19,257 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:45 [2019-11-20 05:55:19,434 INFO L343 Elim1Store]: treesize reduction 77, result has 51.9 percent of original size [2019-11-20 05:55:19,435 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 113 [2019-11-20 05:55:19,435 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:55:19,478 INFO L567 ElimStorePlain]: treesize reduction 54, result has 51.4 percent of original size [2019-11-20 05:55:19,478 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:55:19,478 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:61, output treesize:57 [2019-11-20 05:55:19,678 INFO L343 Elim1Store]: treesize reduction 162, result has 37.0 percent of original size [2019-11-20 05:55:19,678 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 128 [2019-11-20 05:55:19,679 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:55:19,742 INFO L567 ElimStorePlain]: treesize reduction 54, result has 57.1 percent of original size [2019-11-20 05:55:19,742 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:55:19,742 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:76, output treesize:72 [2019-11-20 05:55:20,078 INFO L343 Elim1Store]: treesize reduction 112, result has 38.1 percent of original size [2019-11-20 05:55:20,079 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 87 treesize of output 153 [2019-11-20 05:55:20,091 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:55:20,155 INFO L567 ElimStorePlain]: treesize reduction 76, result has 48.6 percent of original size [2019-11-20 05:55:20,155 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 05:55:20,155 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:97, output treesize:72 [2019-11-20 05:55:21,126 WARN L191 SmtUtils]: Spent 906.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2019-11-20 05:55:21,611 WARN L191 SmtUtils]: Spent 436.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2019-11-20 05:55:21,719 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 67 [2019-11-20 05:55:21,719 INFO L343 Elim1Store]: treesize reduction 112, result has 57.7 percent of original size [2019-11-20 05:55:21,719 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 98 treesize of output 251 [2019-11-20 05:55:21,721 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:55:21,778 INFO L567 ElimStorePlain]: treesize reduction 248, result has 26.4 percent of original size [2019-11-20 05:55:21,779 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 05:55:21,779 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:108, output treesize:89 [2019-11-20 05:55:24,378 WARN L191 SmtUtils]: Spent 2.54 s on a formula simplification that was a NOOP. DAG size: 48 [2019-11-20 05:55:25,793 WARN L191 SmtUtils]: Spent 1.34 s on a formula simplification that was a NOOP. DAG size: 54 [2019-11-20 05:55:25,991 WARN L191 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 99 [2019-11-20 05:55:25,991 INFO L343 Elim1Store]: treesize reduction 112, result has 69.3 percent of original size [2019-11-20 05:55:25,991 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 115 treesize of output 367 [2019-11-20 05:55:25,994 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:55:26,078 INFO L567 ElimStorePlain]: treesize reduction 370, result has 21.3 percent of original size [2019-11-20 05:55:26,079 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-11-20 05:55:26,079 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:125, output treesize:100 [2019-11-20 05:55:29,004 WARN L191 SmtUtils]: Spent 2.87 s on a formula simplification that was a NOOP. DAG size: 55 [2019-11-20 05:55:32,786 WARN L191 SmtUtils]: Spent 3.70 s on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2019-11-20 05:55:32,975 WARN L191 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 99 [2019-11-20 05:55:32,975 INFO L343 Elim1Store]: treesize reduction 112, result has 69.3 percent of original size [2019-11-20 05:55:32,976 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 115 treesize of output 367 [2019-11-20 05:55:32,978 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:55:33,057 INFO L567 ElimStorePlain]: treesize reduction 440, result has 21.3 percent of original size [2019-11-20 05:55:33,058 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-11-20 05:55:33,058 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:125, output treesize:119 [2019-11-20 05:55:34,039 WARN L191 SmtUtils]: Spent 914.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2019-11-20 05:55:35,007 WARN L191 SmtUtils]: Spent 895.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2019-11-20 05:55:35,315 WARN L191 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 135 [2019-11-20 05:55:35,316 INFO L343 Elim1Store]: treesize reduction 112, result has 76.7 percent of original size [2019-11-20 05:55:35,316 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 145 treesize of output 500 [2019-11-20 05:55:35,319 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:55:35,445 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 58 [2019-11-20 05:55:35,445 INFO L567 ElimStorePlain]: treesize reduction 630, result has 17.1 percent of original size [2019-11-20 05:55:35,446 INFO L496 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-11-20 05:55:35,446 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:155, output treesize:130 [2019-11-20 05:55:35,535 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:55:35,619 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:55:35,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:55:35,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 49 [2019-11-20 05:55:35,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231126006] [2019-11-20 05:55:35,621 INFO L442 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-11-20 05:55:35,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:55:35,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-11-20 05:55:35,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=2195, Unknown=0, NotChecked=0, Total=2352 [2019-11-20 05:55:35,622 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 49 states. [2019-11-20 05:55:38,224 WARN L191 SmtUtils]: Spent 1.76 s on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2019-11-20 05:55:41,932 WARN L191 SmtUtils]: Spent 3.57 s on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2019-11-20 05:55:47,762 WARN L191 SmtUtils]: Spent 5.71 s on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2019-11-20 05:55:48,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:55:48,273 INFO L93 Difference]: Finished difference Result 78 states and 90 transitions. [2019-11-20 05:55:48,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-20 05:55:48,274 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 34 [2019-11-20 05:55:48,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:55:48,274 INFO L225 Difference]: With dead ends: 78 [2019-11-20 05:55:48,274 INFO L226 Difference]: Without dead ends: 58 [2019-11-20 05:55:48,276 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 863 ImplicationChecksByTransitivity, 27.2s TimeCoverageRelationStatistics Valid=232, Invalid=3074, Unknown=0, NotChecked=0, Total=3306 [2019-11-20 05:55:48,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-20 05:55:48,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2019-11-20 05:55:48,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-20 05:55:48,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2019-11-20 05:55:48,288 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 34 [2019-11-20 05:55:48,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:55:48,289 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2019-11-20 05:55:48,289 INFO L463 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-11-20 05:55:48,289 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2019-11-20 05:55:48,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-20 05:55:48,292 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:55:48,292 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:55:48,495 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:55:48,495 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:55:48,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:55:48,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1692954744, now seen corresponding path program 3 times [2019-11-20 05:55:48,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:55:48,496 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260086109] [2019-11-20 05:55:48,496 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:55:48,502 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-20 05:55:48,503 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [819299840] [2019-11-20 05:55:48,503 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f8972f5f-68a8-4f81-8a24-656a9049e5be/bin/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:55:48,583 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-20 05:55:48,583 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 05:55:48,584 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-20 05:55:48,586 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:55:48,594 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-11-20 05:55:48,594 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:55:48,599 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:55:48,599 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:55:48,599 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:20 [2019-11-20 05:55:48,632 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:55:48,636 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:55:48,636 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 51 [2019-11-20 05:55:48,636 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:55:48,654 INFO L567 ElimStorePlain]: treesize reduction 24, result has 51.0 percent of original size [2019-11-20 05:55:48,655 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 05:55:48,655 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:25 [2019-11-20 05:55:48,659 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:55:48,663 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:55:48,664 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 51 [2019-11-20 05:55:48,664 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:55:48,677 INFO L567 ElimStorePlain]: treesize reduction 24, result has 51.0 percent of original size [2019-11-20 05:55:48,677 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 05:55:48,677 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:25 [2019-11-20 05:55:48,682 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:55:48,686 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:55:48,686 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 51 [2019-11-20 05:55:48,686 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:55:48,699 INFO L567 ElimStorePlain]: treesize reduction 24, result has 51.0 percent of original size [2019-11-20 05:55:48,699 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 05:55:48,699 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:25 [2019-11-20 05:55:48,711 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:55:48,717 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:55:48,717 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 51 [2019-11-20 05:55:48,718 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:55:48,734 INFO L567 ElimStorePlain]: treesize reduction 24, result has 51.0 percent of original size [2019-11-20 05:55:48,735 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 05:55:48,735 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:50, output treesize:20 [2019-11-20 05:55:48,757 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:55:48,758 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2019-11-20 05:55:48,758 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-11-20 05:55:48,772 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:55:48,772 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:55:48,773 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:55:48,773 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:34, output treesize:16 [2019-11-20 05:55:48,797 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:55:48,819 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-20 05:55:48,819 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260086109] [2019-11-20 05:55:48,819 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-20 05:55:48,819 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819299840] [2019-11-20 05:55:48,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-20 05:55:48,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-20 05:55:48,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3471055] [2019-11-20 05:55:48,819 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 05:55:48,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:55:48,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 05:55:48,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-11-20 05:55:48,820 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 10 states. [2019-11-20 05:55:48,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:55:48,960 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2019-11-20 05:55:48,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 05:55:48,960 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2019-11-20 05:55:48,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:55:48,961 INFO L225 Difference]: With dead ends: 62 [2019-11-20 05:55:48,961 INFO L226 Difference]: Without dead ends: 58 [2019-11-20 05:55:48,961 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2019-11-20 05:55:48,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-20 05:55:48,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2019-11-20 05:55:48,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-20 05:55:48,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2019-11-20 05:55:48,969 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 34 [2019-11-20 05:55:48,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:55:48,970 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2019-11-20 05:55:48,970 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 05:55:48,970 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2019-11-20 05:55:48,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-20 05:55:48,970 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:55:48,970 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:55:49,171 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:55:49,171 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:55:49,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:55:49,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1979212484, now seen corresponding path program 4 times [2019-11-20 05:55:49,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:55:49,171 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023428569] [2019-11-20 05:55:49,171 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:55:49,177 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-20 05:55:49,177 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [462289028] [2019-11-20 05:55:49,178 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f8972f5f-68a8-4f81-8a24-656a9049e5be/bin/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:55:49,237 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 05:55:49,237 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 05:55:49,238 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 33 conjunts are in the unsatisfiable core [2019-11-20 05:55:49,239 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:55:49,243 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-20 05:55:49,243 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:55:49,248 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:55:49,248 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:55:49,248 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-11-20 05:55:49,285 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-11-20 05:55:49,286 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:55:49,290 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:55:49,290 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:55:49,290 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2019-11-20 05:55:49,312 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:55:49,312 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 1 case distinctions, treesize of input 25 treesize of output 54 [2019-11-20 05:55:49,312 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:55:49,328 INFO L567 ElimStorePlain]: treesize reduction 30, result has 48.3 percent of original size [2019-11-20 05:55:49,328 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:55:49,328 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2019-11-20 05:55:52,733 WARN L191 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2019-11-20 05:55:54,264 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:55:54,264 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 91 [2019-11-20 05:55:54,265 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:55:54,285 INFO L567 ElimStorePlain]: treesize reduction 76, result has 32.1 percent of original size [2019-11-20 05:55:54,286 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 05:55:54,286 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:61, output treesize:36 [2019-11-20 05:55:55,416 WARN L191 SmtUtils]: Spent 544.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2019-11-20 05:55:55,452 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:55:55,452 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 91 [2019-11-20 05:55:55,453 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:55:55,478 INFO L567 ElimStorePlain]: treesize reduction 76, result has 32.1 percent of original size [2019-11-20 05:55:55,478 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 05:55:55,479 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:61, output treesize:36 [2019-11-20 05:55:55,966 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:55:55,967 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 91 [2019-11-20 05:55:55,967 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:55:56,002 INFO L567 ElimStorePlain]: treesize reduction 88, result has 29.0 percent of original size [2019-11-20 05:55:56,003 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 05:55:56,003 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:61, output treesize:32 [2019-11-20 05:55:56,062 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:55:56,062 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 54 [2019-11-20 05:55:56,062 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:55:56,075 INFO L567 ElimStorePlain]: treesize reduction 27, result has 35.7 percent of original size [2019-11-20 05:55:56,076 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:55:56,076 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:43, output treesize:10 [2019-11-20 05:55:56,095 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-20 05:55:56,095 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023428569] [2019-11-20 05:55:56,095 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-20 05:55:56,095 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462289028] [2019-11-20 05:55:56,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-20 05:55:56,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-11-20 05:55:56,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354970625] [2019-11-20 05:55:56,096 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-20 05:55:56,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:55:56,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-20 05:55:56,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=192, Unknown=5, NotChecked=0, Total=240 [2019-11-20 05:55:56,096 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand 16 states. [2019-11-20 05:56:01,914 WARN L191 SmtUtils]: Spent 2.49 s on a formula simplification that was a NOOP. DAG size: 31 [2019-11-20 05:56:06,977 WARN L191 SmtUtils]: Spent 2.51 s on a formula simplification that was a NOOP. DAG size: 33 [2019-11-20 05:56:10,425 WARN L191 SmtUtils]: Spent 2.51 s on a formula simplification that was a NOOP. DAG size: 32 [2019-11-20 05:56:13,252 WARN L191 SmtUtils]: Spent 2.39 s on a formula simplification that was a NOOP. DAG size: 32 [2019-11-20 05:56:17,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:56:17,958 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2019-11-20 05:56:17,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-20 05:56:17,959 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 34 [2019-11-20 05:56:17,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:56:17,959 INFO L225 Difference]: With dead ends: 63 [2019-11-20 05:56:17,959 INFO L226 Difference]: Without dead ends: 54 [2019-11-20 05:56:17,960 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 22.6s TimeCoverageRelationStatistics Valid=101, Invalid=394, Unknown=11, NotChecked=0, Total=506 [2019-11-20 05:56:17,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-20 05:56:17,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2019-11-20 05:56:17,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-20 05:56:17,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2019-11-20 05:56:17,970 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 34 [2019-11-20 05:56:17,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:56:17,970 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2019-11-20 05:56:17,970 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-20 05:56:17,970 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2019-11-20 05:56:17,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-20 05:56:17,970 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:56:17,970 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:56:18,171 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:56:18,171 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:56:18,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:56:18,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1035254296, now seen corresponding path program 14 times [2019-11-20 05:56:18,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:56:18,171 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138452469] [2019-11-20 05:56:18,171 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:56:18,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:56:18,314 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 16 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:56:18,314 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138452469] [2019-11-20 05:56:18,314 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778043816] [2019-11-20 05:56:18,314 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f8972f5f-68a8-4f81-8a24-656a9049e5be/bin/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:56:18,367 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 05:56:18,368 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 05:56:18,368 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-20 05:56:18,372 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:56:18,506 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 25 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:56:18,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:56:18,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2019-11-20 05:56:18,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409411678] [2019-11-20 05:56:18,507 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-20 05:56:18,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:56:18,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-20 05:56:18,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2019-11-20 05:56:18,507 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand 22 states. [2019-11-20 05:56:19,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:56:19,053 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2019-11-20 05:56:19,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-20 05:56:19,054 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 36 [2019-11-20 05:56:19,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:56:19,054 INFO L225 Difference]: With dead ends: 68 [2019-11-20 05:56:19,054 INFO L226 Difference]: Without dead ends: 64 [2019-11-20 05:56:19,055 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=265, Invalid=857, Unknown=0, NotChecked=0, Total=1122 [2019-11-20 05:56:19,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-20 05:56:19,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 43. [2019-11-20 05:56:19,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-20 05:56:19,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2019-11-20 05:56:19,063 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 36 [2019-11-20 05:56:19,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:56:19,063 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2019-11-20 05:56:19,063 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-20 05:56:19,063 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2019-11-20 05:56:19,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-20 05:56:19,064 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:56:19,064 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:56:19,270 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:56:19,270 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:56:19,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:56:19,270 INFO L82 PathProgramCache]: Analyzing trace with hash -127223707, now seen corresponding path program 15 times [2019-11-20 05:56:19,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:56:19,270 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345713834] [2019-11-20 05:56:19,270 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:56:19,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:56:19,398 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 38 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:56:19,399 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345713834] [2019-11-20 05:56:19,399 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822421385] [2019-11-20 05:56:19,399 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f8972f5f-68a8-4f81-8a24-656a9049e5be/bin/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:56:19,453 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-11-20 05:56:19,453 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 05:56:19,454 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-20 05:56:19,455 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:56:19,655 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 51 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:56:19,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:56:19,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2019-11-20 05:56:19,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671041548] [2019-11-20 05:56:19,656 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-20 05:56:19,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:56:19,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-20 05:56:19,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2019-11-20 05:56:19,656 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 22 states. [2019-11-20 05:56:19,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:56:19,908 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2019-11-20 05:56:19,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-20 05:56:19,909 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 37 [2019-11-20 05:56:19,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:56:19,909 INFO L225 Difference]: With dead ends: 72 [2019-11-20 05:56:19,909 INFO L226 Difference]: Without dead ends: 46 [2019-11-20 05:56:19,910 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2019-11-20 05:56:19,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-20 05:56:19,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2019-11-20 05:56:19,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-20 05:56:19,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2019-11-20 05:56:19,918 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 37 [2019-11-20 05:56:19,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:56:19,918 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2019-11-20 05:56:19,918 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-20 05:56:19,918 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2019-11-20 05:56:19,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-20 05:56:19,918 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:56:19,918 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:56:20,119 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:56:20,119 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:56:20,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:56:20,120 INFO L82 PathProgramCache]: Analyzing trace with hash 639592647, now seen corresponding path program 16 times [2019-11-20 05:56:20,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:56:20,120 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438739393] [2019-11-20 05:56:20,120 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:56:20,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:56:20,377 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2019-11-20 05:56:21,295 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:56:21,295 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438739393] [2019-11-20 05:56:21,296 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548909045] [2019-11-20 05:56:21,296 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f8972f5f-68a8-4f81-8a24-656a9049e5be/bin/uautomizer/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:56:21,358 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 05:56:21,358 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 05:56:21,359 WARN L253 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 65 conjunts are in the unsatisfiable core [2019-11-20 05:56:21,361 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:56:21,369 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-20 05:56:21,369 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:56:21,376 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:56:21,379 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-20 05:56:21,379 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 05:56:21,392 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:56:21,392 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 05:56:21,392 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2019-11-20 05:56:21,432 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 23 treesize of output 22 [2019-11-20 05:56:21,432 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:56:21,440 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:56:21,440 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:56:21,440 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:29 [2019-11-20 05:56:21,550 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:56:21,550 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 1 case distinctions, treesize of input 34 treesize of output 72 [2019-11-20 05:56:21,550 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:56:21,582 INFO L567 ElimStorePlain]: treesize reduction 36, result has 55.6 percent of original size [2019-11-20 05:56:21,583 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 05:56:21,583 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:45 [2019-11-20 05:56:21,729 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:56:21,729 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 138 [2019-11-20 05:56:21,730 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:56:21,770 INFO L567 ElimStorePlain]: treesize reduction 72, result has 45.9 percent of original size [2019-11-20 05:56:21,771 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 05:56:21,771 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:65, output treesize:61 [2019-11-20 05:56:21,972 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:56:21,972 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 220 [2019-11-20 05:56:21,973 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:56:22,032 INFO L567 ElimStorePlain]: treesize reduction 108, result has 41.6 percent of original size [2019-11-20 05:56:22,033 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-11-20 05:56:22,033 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:77 [2019-11-20 05:56:22,261 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:56:22,261 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 67 treesize of output 318 [2019-11-20 05:56:22,262 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:56:22,340 INFO L567 ElimStorePlain]: treesize reduction 144, result has 39.2 percent of original size [2019-11-20 05:56:22,340 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-11-20 05:56:22,340 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:97, output treesize:93 [2019-11-20 05:56:22,687 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2019-11-20 05:56:22,687 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:56:22,688 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 432 [2019-11-20 05:56:22,688 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:56:22,792 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 60 [2019-11-20 05:56:22,793 INFO L567 ElimStorePlain]: treesize reduction 180, result has 37.7 percent of original size [2019-11-20 05:56:22,793 INFO L496 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-11-20 05:56:22,793 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:113, output treesize:109 [2019-11-20 05:56:28,029 WARN L191 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2019-11-20 05:56:28,029 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:56:28,029 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 110 treesize of output 447 [2019-11-20 05:56:28,032 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:56:28,240 WARN L191 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 66 [2019-11-20 05:56:28,241 INFO L567 ElimStorePlain]: treesize reduction 600, result has 17.7 percent of original size [2019-11-20 05:56:28,241 INFO L496 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-11-20 05:56:28,242 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:150, output treesize:129 [2019-11-20 05:56:28,740 WARN L191 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2019-11-20 05:56:28,740 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:56:28,741 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 125 treesize of output 573 [2019-11-20 05:56:28,743 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:56:28,948 WARN L191 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 74 [2019-11-20 05:56:28,949 INFO L567 ElimStorePlain]: treesize reduction 680, result has 18.2 percent of original size [2019-11-20 05:56:28,949 INFO L496 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-2 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-11-20 05:56:28,950 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:170, output treesize:151 [2019-11-20 05:56:29,563 WARN L191 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2019-11-20 05:56:29,564 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:56:29,564 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 142 treesize of output 717 [2019-11-20 05:56:29,567 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:56:29,737 WARN L191 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 81 [2019-11-20 05:56:29,738 INFO L567 ElimStorePlain]: treesize reduction 528, result has 24.0 percent of original size [2019-11-20 05:56:29,739 INFO L496 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 1 dim-2 vars, End of recursive call: 8 dim-0 vars, and 1 xjuncts. [2019-11-20 05:56:29,739 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 9 variables, input treesize:192, output treesize:167 [2019-11-20 05:56:30,608 WARN L191 SmtUtils]: Spent 377.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2019-11-20 05:56:30,608 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:56:30,609 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 45 case distinctions, treesize of input 153 treesize of output 875 [2019-11-20 05:56:30,614 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:56:30,831 WARN L191 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 89 [2019-11-20 05:56:30,831 INFO L567 ElimStorePlain]: treesize reduction 768, result has 19.2 percent of original size [2019-11-20 05:56:30,832 INFO L496 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 1 dim-2 vars, End of recursive call: 9 dim-0 vars, and 1 xjuncts. [2019-11-20 05:56:30,832 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 10 variables, input treesize:208, output treesize:183 [2019-11-20 05:56:32,747 WARN L191 SmtUtils]: Spent 483.00 ms on a formula simplification that was a NOOP. DAG size: 267 [2019-11-20 05:56:32,748 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:56:32,748 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 1 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 55 case distinctions, treesize of input 164 treesize of output 1049 [2019-11-20 05:56:32,753 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:56:33,136 WARN L191 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 95 [2019-11-20 05:56:33,136 INFO L567 ElimStorePlain]: treesize reduction 1200, result has 13.6 percent of original size [2019-11-20 05:56:33,137 INFO L496 ElimStorePlain]: Start of recursive call 1: 10 dim-0 vars, 1 dim-2 vars, End of recursive call: 10 dim-0 vars, and 1 xjuncts. [2019-11-20 05:56:33,137 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 11 variables, input treesize:224, output treesize:189 [2019-11-20 05:56:35,863 WARN L191 SmtUtils]: Spent 425.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2019-11-20 05:56:37,184 WARN L191 SmtUtils]: Spent 684.00 ms on a formula simplification that was a NOOP. DAG size: 315 [2019-11-20 05:56:37,185 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:56:37,185 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 1 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 66 case distinctions, treesize of input 165 treesize of output 1237 [2019-11-20 05:56:37,191 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:56:37,476 WARN L191 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 79 [2019-11-20 05:56:37,476 INFO L567 ElimStorePlain]: treesize reduction 1226, result has 10.4 percent of original size [2019-11-20 05:56:37,681 INFO L496 ElimStorePlain]: Start of recursive call 1: 14 dim-0 vars, 1 dim-2 vars, End of recursive call: 8 dim-0 vars, and 1 xjuncts. [2019-11-20 05:56:37,681 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 15 variables, input treesize:233, output treesize:114 [2019-11-20 05:56:37,813 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:56:37,944 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:56:37,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:56:37,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 35] total 63 [2019-11-20 05:56:37,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757801729] [2019-11-20 05:56:37,945 INFO L442 AbstractCegarLoop]: Interpolant automaton has 63 states [2019-11-20 05:56:37,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:56:37,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2019-11-20 05:56:37,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=3700, Unknown=0, NotChecked=0, Total=3906 [2019-11-20 05:56:37,946 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 63 states. [2019-11-20 05:56:43,570 WARN L191 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2019-11-20 05:57:01,963 WARN L191 SmtUtils]: Spent 2.32 s on a formula simplification. DAG size of input: 94 DAG size of output: 72 [2019-11-20 05:57:54,211 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 76 [2019-11-20 05:58:12,910 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 81 [2019-11-20 05:58:33,349 WARN L191 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 86 [2019-11-20 05:59:28,760 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 94 [2019-11-20 05:59:48,918 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 92 [2019-11-20 06:00:46,663 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 101 [2019-11-20 06:01:09,059 WARN L191 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 96 [2019-11-20 06:01:19,414 WARN L191 SmtUtils]: Spent 1.70 s on a formula simplification that was a NOOP. DAG size: 100 [2019-11-20 06:03:27,505 WARN L191 SmtUtils]: Spent 795.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 108 [2019-11-20 06:03:53,365 WARN L191 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 105 [2019-11-20 06:04:04,182 WARN L191 SmtUtils]: Spent 583.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 106 [2019-11-20 06:04:47,529 WARN L194 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2019-11-20 06:04:47,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-20 06:04:47,731 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 06:04:47,731 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:225) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:153) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.managedscript.ManagedScript.checkSat(ManagedScript.java:140) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:84) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:899) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:773) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:345) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:388) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:229) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:281) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:234) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1066) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:968) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:188) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:698) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:627) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:454) 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$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1461) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:654) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:205) ... 44 more [2019-11-20 06:04:47,735 INFO L168 Benchmark]: Toolchain (without parser) took 602370.25 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 400.0 MB). Free memory was 952.8 MB in the beginning and 1.0 GB in the end (delta: -89.4 MB). Peak memory consumption was 310.7 MB. Max. memory is 11.5 GB. [2019-11-20 06:04:47,736 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 06:04:47,736 INFO L168 Benchmark]: CACSL2BoogieTranslator took 455.62 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 171.4 MB). Free memory was 952.8 MB in the beginning and 1.2 GB in the end (delta: -210.8 MB). Peak memory consumption was 22.8 MB. Max. memory is 11.5 GB. [2019-11-20 06:04:47,737 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.18 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 06:04:47,737 INFO L168 Benchmark]: Boogie Preprocessor took 56.83 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 06:04:47,737 INFO L168 Benchmark]: RCFGBuilder took 500.61 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: 22.2 MB). Peak memory consumption was 22.2 MB. Max. memory is 11.5 GB. [2019-11-20 06:04:47,738 INFO L168 Benchmark]: TraceAbstraction took 601298.42 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 228.6 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 92.7 MB). Peak memory consumption was 321.3 MB. Max. memory is 11.5 GB. [2019-11-20 06:04:47,739 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 455.62 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 171.4 MB). Free memory was 952.8 MB in the beginning and 1.2 GB in the end (delta: -210.8 MB). Peak memory consumption was 22.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 52.18 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 56.83 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 500.61 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: 22.2 MB). Peak memory consumption was 22.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 601298.42 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 228.6 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 92.7 MB). Peak memory consumption was 321.3 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) 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 06:04:49,741 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 06:04:49,743 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 06:04:49,762 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 06:04:49,763 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 06:04:49,765 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 06:04:49,767 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 06:04:49,777 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 06:04:49,782 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 06:04:49,787 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 06:04:49,788 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 06:04:49,790 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 06:04:49,791 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 06:04:49,793 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 06:04:49,794 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 06:04:49,796 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 06:04:49,798 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 06:04:49,799 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 06:04:49,801 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 06:04:49,806 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 06:04:49,811 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 06:04:49,814 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 06:04:49,817 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 06:04:49,819 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 06:04:49,823 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 06:04:49,824 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 06:04:49,824 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 06:04:49,827 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 06:04:49,828 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 06:04:49,829 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 06:04:49,829 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 06:04:49,830 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 06:04:49,830 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 06:04:49,831 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 06:04:49,833 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 06:04:49,834 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 06:04:49,835 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 06:04:49,835 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 06:04:49,835 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 06:04:49,836 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 06:04:49,838 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 06:04:49,838 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_f8972f5f-68a8-4f81-8a24-656a9049e5be/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2019-11-20 06:04:49,871 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 06:04:49,883 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 06:04:49,885 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 06:04:49,885 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 06:04:49,885 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 06:04:49,886 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 06:04:49,886 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 06:04:49,887 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 06:04:49,887 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 06:04:49,887 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-20 06:04:49,887 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 06:04:49,888 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-20 06:04:49,888 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-20 06:04:49,888 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-20 06:04:49,889 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 06:04:49,889 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 06:04:49,889 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 06:04:49,889 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-20 06:04:49,890 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 06:04:49,890 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 06:04:49,890 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 06:04:49,891 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 06:04:49,892 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 06:04:49,892 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 06:04:49,893 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 06:04:49,893 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-20 06:04:49,893 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-20 06:04:49,893 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-20 06:04:49,894 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-20 06:04:49,895 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-20 06:04:49,895 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_f8972f5f-68a8-4f81-8a24-656a9049e5be/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 -> e8598617cfb64d0ef5bf661838d245a9dbabbc61 [2019-11-20 06:04:50,216 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 06:04:50,228 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 06:04:50,232 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 06:04:50,233 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 06:04:50,234 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 06:04:50,234 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_f8972f5f-68a8-4f81-8a24-656a9049e5be/bin/uautomizer/../../sv-benchmarks/c/array-fpi/s2if.c [2019-11-20 06:04:50,308 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f8972f5f-68a8-4f81-8a24-656a9049e5be/bin/uautomizer/data/f5ad5730d/cd2069c581864143b6c0beb1c4c037c8/FLAG88070a741 [2019-11-20 06:04:50,701 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 06:04:50,702 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_f8972f5f-68a8-4f81-8a24-656a9049e5be/sv-benchmarks/c/array-fpi/s2if.c [2019-11-20 06:04:50,708 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f8972f5f-68a8-4f81-8a24-656a9049e5be/bin/uautomizer/data/f5ad5730d/cd2069c581864143b6c0beb1c4c037c8/FLAG88070a741 [2019-11-20 06:04:51,081 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_f8972f5f-68a8-4f81-8a24-656a9049e5be/bin/uautomizer/data/f5ad5730d/cd2069c581864143b6c0beb1c4c037c8 [2019-11-20 06:04:51,083 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 06:04:51,084 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 06:04:51,085 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 06:04:51,085 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 06:04:51,088 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 06:04:51,089 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:04:51" (1/1) ... [2019-11-20 06:04:51,091 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@734f3800 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:04:51, skipping insertion in model container [2019-11-20 06:04:51,092 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:04:51" (1/1) ... [2019-11-20 06:04:51,099 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 06:04:51,115 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 06:04:51,356 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 06:04:51,369 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 06:04:51,404 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 06:04:51,424 INFO L192 MainTranslator]: Completed translation [2019-11-20 06:04:51,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:04:51 WrapperNode [2019-11-20 06:04:51,424 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 06:04:51,425 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 06:04:51,425 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 06:04:51,425 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 06:04:51,434 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:04:51" (1/1) ... [2019-11-20 06:04:51,506 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:04:51" (1/1) ... [2019-11-20 06:04:51,534 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 06:04:51,534 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 06:04:51,534 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 06:04:51,534 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 06:04:51,541 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:04:51" (1/1) ... [2019-11-20 06:04:51,542 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:04:51" (1/1) ... [2019-11-20 06:04:51,545 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:04:51" (1/1) ... [2019-11-20 06:04:51,546 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:04:51" (1/1) ... [2019-11-20 06:04:51,553 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:04:51" (1/1) ... [2019-11-20 06:04:51,565 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:04:51" (1/1) ... [2019-11-20 06:04:51,568 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:04:51" (1/1) ... [2019-11-20 06:04:51,570 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 06:04:51,571 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 06:04:51,571 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 06:04:51,571 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 06:04:51,572 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:04:51" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f8972f5f-68a8-4f81-8a24-656a9049e5be/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 06:04:51,629 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-20 06:04:51,629 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2019-11-20 06:04:51,630 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-20 06:04:51,630 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-20 06:04:51,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 06:04:51,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 06:04:51,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2019-11-20 06:04:51,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-20 06:04:51,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-20 06:04:51,962 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 06:04:51,962 INFO L285 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-20 06:04:51,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:04:51 BoogieIcfgContainer [2019-11-20 06:04:51,964 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 06:04:51,965 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 06:04:51,965 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 06:04:51,968 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 06:04:51,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:04:51" (1/3) ... [2019-11-20 06:04:51,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23982db0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:04:51, skipping insertion in model container [2019-11-20 06:04:51,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:04:51" (2/3) ... [2019-11-20 06:04:51,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23982db0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:04:51, skipping insertion in model container [2019-11-20 06:04:51,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:04:51" (3/3) ... [2019-11-20 06:04:51,980 INFO L109 eAbstractionObserver]: Analyzing ICFG s2if.c [2019-11-20 06:04:51,990 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 06:04:51,996 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-20 06:04:52,016 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-20 06:04:52,062 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 06:04:52,062 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-20 06:04:52,062 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 06:04:52,062 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 06:04:52,065 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 06:04:52,065 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 06:04:52,066 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 06:04:52,066 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 06:04:52,077 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-11-20 06:04:52,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-20 06:04:52,083 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 06:04:52,084 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 06:04:52,085 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 06:04:52,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 06:04:52,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1476218026, now seen corresponding path program 1 times [2019-11-20 06:04:52,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 06:04:52,103 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2025004101] [2019-11-20 06:04:52,103 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f8972f5f-68a8-4f81-8a24-656a9049e5be/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 06:04:52,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:04:52,208 INFO L255 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-20 06:04:52,213 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 06:04:52,226 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 06:04:52,226 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 06:04:52,230 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 06:04:52,232 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2025004101] [2019-11-20 06:04:52,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 06:04:52,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-20 06:04:52,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381964670] [2019-11-20 06:04:52,237 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-20 06:04:52,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 06:04:52,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-20 06:04:52,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-20 06:04:52,250 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2019-11-20 06:04:52,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 06:04:52,264 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2019-11-20 06:04:52,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-20 06:04:52,265 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2019-11-20 06:04:52,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 06:04:52,273 INFO L225 Difference]: With dead ends: 29 [2019-11-20 06:04:52,274 INFO L226 Difference]: Without dead ends: 13 [2019-11-20 06:04:52,277 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-20 06:04:52,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-11-20 06:04:52,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-11-20 06:04:52,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-20 06:04:52,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2019-11-20 06:04:52,307 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 9 [2019-11-20 06:04:52,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 06:04:52,308 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2019-11-20 06:04:52,308 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-20 06:04:52,308 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2019-11-20 06:04:52,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-20 06:04:52,309 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 06:04:52,309 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 06:04:52,511 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 06:04:52,511 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 06:04:52,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 06:04:52,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1304115419, now seen corresponding path program 1 times [2019-11-20 06:04:52,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 06:04:52,514 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [371962326] [2019-11-20 06:04:52,514 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f8972f5f-68a8-4f81-8a24-656a9049e5be/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 06:04:52,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:04:52,606 INFO L255 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-20 06:04:52,608 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 06:04:52,649 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 06:04:52,649 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 06:04:52,672 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 06:04:52,672 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [371962326] [2019-11-20 06:04:52,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 06:04:52,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-20 06:04:52,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389399584] [2019-11-20 06:04:52,675 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 06:04:52,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 06:04:52,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 06:04:52,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-20 06:04:52,676 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 4 states. [2019-11-20 06:04:52,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 06:04:52,844 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2019-11-20 06:04:52,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-20 06:04:52,845 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2019-11-20 06:04:52,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 06:04:52,846 INFO L225 Difference]: With dead ends: 23 [2019-11-20 06:04:52,846 INFO L226 Difference]: Without dead ends: 15 [2019-11-20 06:04:52,847 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-20 06:04:52,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-20 06:04:52,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2019-11-20 06:04:52,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-20 06:04:52,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2019-11-20 06:04:52,851 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9 [2019-11-20 06:04:52,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 06:04:52,851 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2019-11-20 06:04:52,851 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 06:04:52,852 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2019-11-20 06:04:52,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-20 06:04:52,857 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 06:04:52,858 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 06:04:53,073 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 06:04:53,073 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 06:04:53,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 06:04:53,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1358761923, now seen corresponding path program 1 times [2019-11-20 06:04:53,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 06:04:53,075 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [780153373] [2019-11-20 06:04:53,075 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f8972f5f-68a8-4f81-8a24-656a9049e5be/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 06:04:53,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:04:53,176 INFO L255 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 06:04:53,177 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 06:04:53,270 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 06:04:53,270 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 06:04:53,390 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 06:04:53,390 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [780153373] [2019-11-20 06:04:53,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 06:04:53,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-11-20 06:04:53,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850278422] [2019-11-20 06:04:53,392 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 06:04:53,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 06:04:53,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 06:04:53,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-11-20 06:04:53,393 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 10 states. [2019-11-20 06:04:53,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 06:04:53,890 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2019-11-20 06:04:53,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-20 06:04:53,891 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 11 [2019-11-20 06:04:53,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 06:04:53,892 INFO L225 Difference]: With dead ends: 39 [2019-11-20 06:04:53,892 INFO L226 Difference]: Without dead ends: 32 [2019-11-20 06:04:53,893 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2019-11-20 06:04:53,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-20 06:04:53,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 22. [2019-11-20 06:04:53,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-20 06:04:53,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-11-20 06:04:53,904 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 11 [2019-11-20 06:04:53,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 06:04:53,906 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-11-20 06:04:53,907 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 06:04:53,907 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-11-20 06:04:53,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-20 06:04:53,908 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 06:04:53,908 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 06:04:54,113 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 06:04:54,113 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 06:04:54,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 06:04:54,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1565637502, now seen corresponding path program 1 times [2019-11-20 06:04:54,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 06:04:54,115 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [89927220] [2019-11-20 06:04:54,115 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f8972f5f-68a8-4f81-8a24-656a9049e5be/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 06:04:54,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:04:54,231 INFO L255 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 06:04:54,233 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 06:04:54,294 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-20 06:04:54,295 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 06:04:54,323 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 06:04:54,331 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 06:04:54,332 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 06:04:54,336 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2019-11-20 06:04:54,336 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 06:04:54,351 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 06:04:54,351 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 06:04:54,352 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:28 [2019-11-20 06:04:54,395 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 06:04:54,398 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2019-11-20 06:04:54,399 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 06:04:54,435 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 06:04:54,437 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 06:04:54,437 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:39 [2019-11-20 06:04:54,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 06:04:54,592 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 06:04:54,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 06:04:54,695 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [89927220] [2019-11-20 06:04:54,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 06:04:54,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 3] imperfect sequences [] total 6 [2019-11-20 06:04:54,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210138284] [2019-11-20 06:04:54,696 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 06:04:54,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 06:04:54,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 06:04:54,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-20 06:04:54,697 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 6 states. [2019-11-20 06:04:55,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 06:04:55,041 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-11-20 06:04:55,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 06:04:55,043 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2019-11-20 06:04:55,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 06:04:55,044 INFO L225 Difference]: With dead ends: 31 [2019-11-20 06:04:55,044 INFO L226 Difference]: Without dead ends: 22 [2019-11-20 06:04:55,044 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-11-20 06:04:55,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-20 06:04:55,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-11-20 06:04:55,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-20 06:04:55,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2019-11-20 06:04:55,053 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 14 [2019-11-20 06:04:55,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 06:04:55,054 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2019-11-20 06:04:55,054 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 06:04:55,054 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2019-11-20 06:04:55,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-20 06:04:55,055 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 06:04:55,055 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 06:04:55,257 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 06:04:55,258 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 06:04:55,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 06:04:55,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1508379200, now seen corresponding path program 1 times [2019-11-20 06:04:55,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 06:04:55,259 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1725707888] [2019-11-20 06:04:55,259 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f8972f5f-68a8-4f81-8a24-656a9049e5be/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 06:04:55,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:04:55,342 INFO L255 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 06:04:55,343 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 06:04:55,361 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-20 06:04:55,361 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 06:04:55,369 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 06:04:55,369 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 06:04:55,369 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-11-20 06:04:55,414 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2019-11-20 06:04:55,415 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 06:04:55,421 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 06:04:55,422 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 06:04:55,422 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:3 [2019-11-20 06:04:55,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 06:04:55,431 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 06:04:55,498 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2019-11-20 06:04:55,527 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2019-11-20 06:04:55,528 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 06:04:55,533 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 06:04:55,534 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 06:04:55,541 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 06:04:55,542 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 06:04:55,542 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:16, output treesize:7 [2019-11-20 06:04:55,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 06:04:55,573 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1725707888] [2019-11-20 06:04:55,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 06:04:55,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2019-11-20 06:04:55,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54712889] [2019-11-20 06:04:55,574 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-20 06:04:55,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 06:04:55,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-20 06:04:55,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-20 06:04:55,575 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 9 states. [2019-11-20 06:04:55,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 06:04:55,697 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2019-11-20 06:04:55,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 06:04:55,698 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2019-11-20 06:04:55,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 06:04:55,698 INFO L225 Difference]: With dead ends: 23 [2019-11-20 06:04:55,698 INFO L226 Difference]: Without dead ends: 0 [2019-11-20 06:04:55,699 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2019-11-20 06:04:55,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-20 06:04:55,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-20 06:04:55,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-20 06:04:55,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-20 06:04:55,700 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2019-11-20 06:04:55,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 06:04:55,700 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 06:04:55,701 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-20 06:04:55,701 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-20 06:04:55,701 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-20 06:04:55,901 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 06:04:55,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-20 06:04:58,292 WARN L191 SmtUtils]: Spent 2.23 s on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2019-11-20 06:04:58,294 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-20 06:04:58,295 INFO L444 ceAbstractionStarter]: For program point L27-2(lines 27 30) no Hoare annotation was computed. [2019-11-20 06:04:58,295 INFO L440 ceAbstractionStarter]: At program point L27-3(lines 27 30) the Hoare annotation is: (let ((.cse4 (select |#memory_int| |ULTIMATE.start_main_~#sum~0.base|)) (.cse5 ((_ sign_extend 32) (_ bv0 32)))) (let ((.cse0 (= (_ bv0 32) ULTIMATE.start_main_~a~0.offset)) (.cse1 (= |ULTIMATE.start_main_~#sum~0.offset| (_ bv0 32))) (.cse2 (= (select .cse4 (bvadd |ULTIMATE.start_main_~#sum~0.offset| (_ bv4 32))) ((_ extract 63 32) .cse5))) (.cse3 (= (select .cse4 |ULTIMATE.start_main_~#sum~0.offset|) ((_ extract 31 0) .cse5)))) (or (and .cse0 (bvslt (_ bv0 32) ~N~0) .cse1 .cse2 .cse3 (= (_ bv2 32) (select (select |#memory_int| ULTIMATE.start_main_~a~0.base) ULTIMATE.start_main_~a~0.offset))) (and .cse0 (= (_ bv0 32) ULTIMATE.start_main_~i~0) .cse1 (not (bvsle ~N~0 (_ bv0 32))) .cse2 .cse3 (not (= ULTIMATE.start_main_~a~0.base |ULTIMATE.start_main_~#sum~0.base|)))))) [2019-11-20 06:04:58,295 INFO L444 ceAbstractionStarter]: For program point L27-4(lines 27 30) no Hoare annotation was computed. [2019-11-20 06:04:58,295 INFO L444 ceAbstractionStarter]: For program point L19(line 19) no Hoare annotation was computed. [2019-11-20 06:04:58,295 INFO L447 ceAbstractionStarter]: At program point L42(lines 16 43) the Hoare annotation is: true [2019-11-20 06:04:58,295 INFO L444 ceAbstractionStarter]: For program point L34(lines 34 38) no Hoare annotation was computed. [2019-11-20 06:04:58,296 INFO L444 ceAbstractionStarter]: For program point L-1(line -1) no Hoare annotation was computed. [2019-11-20 06:04:58,296 INFO L444 ceAbstractionStarter]: For program point L32-2(lines 32 39) no Hoare annotation was computed. [2019-11-20 06:04:58,296 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-20 06:04:58,296 INFO L440 ceAbstractionStarter]: At program point L32-3(lines 32 39) the Hoare annotation is: (let ((.cse0 (select |#memory_int| |ULTIMATE.start_main_~#sum~0.base|)) (.cse1 ((_ sign_extend 32) (_ bv0 32)))) (and (= (_ bv0 32) ULTIMATE.start_main_~a~0.offset) (= (_ bv0 32) ULTIMATE.start_main_~i~0) (= |ULTIMATE.start_main_~#sum~0.offset| (_ bv0 32)) (not (bvsle ~N~0 (_ bv0 32))) (= (select .cse0 (bvadd |ULTIMATE.start_main_~#sum~0.offset| (_ bv4 32))) ((_ extract 63 32) .cse1)) (= (select .cse0 |ULTIMATE.start_main_~#sum~0.offset|) ((_ extract 31 0) .cse1)) (= (_ bv2 32) (select (select |#memory_int| ULTIMATE.start_main_~a~0.base) ULTIMATE.start_main_~a~0.offset)))) [2019-11-20 06:04:58,296 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-20 06:04:58,296 INFO L444 ceAbstractionStarter]: For program point L32-4(lines 32 39) no Hoare annotation was computed. [2019-11-20 06:04:58,296 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 10) no Hoare annotation was computed. [2019-11-20 06:04:58,296 INFO L444 ceAbstractionStarter]: For program point L10(line 10) no Hoare annotation was computed. [2019-11-20 06:04:58,297 INFO L444 ceAbstractionStarter]: For program point L10-1(line 10) no Hoare annotation was computed. [2019-11-20 06:04:58,297 INFO L444 ceAbstractionStarter]: For program point L10-3(line 10) no Hoare annotation was computed. [2019-11-20 06:04:58,304 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 06:04:58,305 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 06:04:58,306 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 06:04:58,310 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 06:04:58,310 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 06:04:58,311 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 06:04:58,313 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 06:04:58,313 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 06:04:58,314 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 06:04:58,314 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 06:04:58,314 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 06:04:58,315 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 06:04:58,316 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 06:04:58,316 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 06:04:58,316 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 06:04:58,317 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 06:04:58,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 06:04:58 BoogieIcfgContainer [2019-11-20 06:04:58,319 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-20 06:04:58,320 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 06:04:58,320 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 06:04:58,320 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 06:04:58,321 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:04:51" (3/4) ... [2019-11-20 06:04:58,324 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-20 06:04:58,332 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2019-11-20 06:04:58,333 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2019-11-20 06:04:58,333 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2019-11-20 06:04:58,384 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_f8972f5f-68a8-4f81-8a24-656a9049e5be/bin/uautomizer/witness.graphml [2019-11-20 06:04:58,385 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 06:04:58,386 INFO L168 Benchmark]: Toolchain (without parser) took 7302.33 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 114.3 MB). Free memory was 961.8 MB in the beginning and 879.4 MB in the end (delta: 82.4 MB). Peak memory consumption was 196.7 MB. Max. memory is 11.5 GB. [2019-11-20 06:04:58,387 INFO L168 Benchmark]: CDTParser took 0.28 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 06:04:58,388 INFO L168 Benchmark]: CACSL2BoogieTranslator took 339.75 ms. Allocated memory is still 1.0 GB. Free memory was 961.8 MB in the beginning and 951.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-20 06:04:58,388 INFO L168 Benchmark]: Boogie Procedure Inliner took 108.86 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 114.3 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -152.7 MB). Peak memory consumption was 15.2 MB. Max. memory is 11.5 GB. [2019-11-20 06:04:58,389 INFO L168 Benchmark]: Boogie Preprocessor took 36.71 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 06:04:58,390 INFO L168 Benchmark]: RCFGBuilder took 392.72 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 20.6 MB). Peak memory consumption was 20.6 MB. Max. memory is 11.5 GB. [2019-11-20 06:04:58,390 INFO L168 Benchmark]: TraceAbstraction took 6354.64 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 886.1 MB in the end (delta: 197.1 MB). Peak memory consumption was 197.1 MB. Max. memory is 11.5 GB. [2019-11-20 06:04:58,391 INFO L168 Benchmark]: Witness Printer took 65.18 ms. Allocated memory is still 1.1 GB. Free memory was 886.1 MB in the beginning and 879.4 MB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2019-11-20 06:04:58,394 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 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 339.75 ms. Allocated memory is still 1.0 GB. Free memory was 961.8 MB in the beginning and 951.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 108.86 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 114.3 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -152.7 MB). Peak memory consumption was 15.2 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 36.71 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 392.72 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 20.6 MB). Peak memory consumption was 20.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 6354.64 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 886.1 MB in the end (delta: 197.1 MB). Peak memory consumption was 197.1 MB. Max. memory is 11.5 GB. * Witness Printer took 65.18 ms. Allocated memory is still 1.1 GB. Free memory was 886.1 MB in the beginning and 879.4 MB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 10]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 32]: Loop Invariant [2019-11-20 06:04:58,405 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 06:04:58,405 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 06:04:58,405 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 06:04:58,406 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 06:04:58,407 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 06:04:58,407 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int Derived loop invariant: (((((0bv32 == a && 0bv32 == i) && sum == 0bv32) && !~bvsle32(N, 0bv32)) && unknown-#memory_int-unknown[sum][~bvadd16(sum, 4bv32)] == ~sign_extendFrom32To64(0bv32)[63:32]) && unknown-#memory_int-unknown[sum][sum] == ~sign_extendFrom32To64(0bv32)[31:0]) && 2bv32 == unknown-#memory_int-unknown[a][a] - InvariantResult [Line: 27]: Loop Invariant [2019-11-20 06:04:58,408 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 06:04:58,408 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 06:04:58,409 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 06:04:58,409 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 06:04:58,409 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 06:04:58,411 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 06:04:58,411 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 06:04:58,411 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 06:04:58,412 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 06:04:58,412 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int Derived loop invariant: (((((0bv32 == a && ~bvslt32(0bv32, N)) && sum == 0bv32) && unknown-#memory_int-unknown[sum][~bvadd16(sum, 4bv32)] == ~sign_extendFrom32To64(0bv32)[63:32]) && unknown-#memory_int-unknown[sum][sum] == ~sign_extendFrom32To64(0bv32)[31:0]) && 2bv32 == unknown-#memory_int-unknown[a][a]) || ((((((0bv32 == a && 0bv32 == i) && sum == 0bv32) && !~bvsle32(N, 0bv32)) && unknown-#memory_int-unknown[sum][~bvadd16(sum, 4bv32)] == ~sign_extendFrom32To64(0bv32)[63:32]) && unknown-#memory_int-unknown[sum][sum] == ~sign_extendFrom32To64(0bv32)[31:0]) && !(a == sum)) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 1 error locations. Result: SAFE, OverallTime: 6.2s, OverallIterations: 5, TraceHistogramMax: 1, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.3s, HoareTripleCheckerStatistics: 50 SDtfs, 74 SDslu, 29 SDs, 0 SdLazy, 164 SolverSat, 37 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 110 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 11 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 8 NumberOfFragments, 118 HoareAnnotationTreeSize, 3 FomulaSimplifications, 64 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 97 FormulaSimplificationTreeSizeReductionInter, 2.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 57 NumberOfCodeBlocks, 57 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 104 ConstructedInterpolants, 5 QuantifiedInterpolants, 7240 SizeOfPredicates, 24 NumberOfNonLiveVariables, 186 ConjunctsInSsa, 27 ConjunctsInUnsatCore, 10 InterpolantComputations, 6 PerfectInterpolantSequences, 6/10 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...