./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/s5if.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_be180448-1754-4549-ac2c-422d1ff3b4eb/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_be180448-1754-4549-ac2c-422d1ff3b4eb/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_be180448-1754-4549-ac2c-422d1ff3b4eb/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_be180448-1754-4549-ac2c-422d1ff3b4eb/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/s5if.c -s /tmp/vcloud-vcloud-master/worker/run_dir_be180448-1754-4549-ac2c-422d1ff3b4eb/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_be180448-1754-4549-ac2c-422d1ff3b4eb/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 04a56f9ad65a098e527ed274929f036070b1f0d1 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_be180448-1754-4549-ac2c-422d1ff3b4eb/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_be180448-1754-4549-ac2c-422d1ff3b4eb/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_be180448-1754-4549-ac2c-422d1ff3b4eb/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_be180448-1754-4549-ac2c-422d1ff3b4eb/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/s5if.c -s /tmp/vcloud-vcloud-master/worker/run_dir_be180448-1754-4549-ac2c-422d1ff3b4eb/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_be180448-1754-4549-ac2c-422d1ff3b4eb/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 04a56f9ad65a098e527ed274929f036070b1f0d1 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 07:10:49,147 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 07:10:49,150 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 07:10:49,167 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 07:10:49,168 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 07:10:49,169 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 07:10:49,172 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 07:10:49,181 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 07:10:49,187 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 07:10:49,191 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 07:10:49,193 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 07:10:49,194 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 07:10:49,194 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 07:10:49,197 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 07:10:49,198 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 07:10:49,199 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 07:10:49,200 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 07:10:49,201 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 07:10:49,203 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 07:10:49,207 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 07:10:49,211 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 07:10:49,213 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 07:10:49,217 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 07:10:49,218 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 07:10:49,221 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 07:10:49,221 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 07:10:49,223 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 07:10:49,226 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 07:10:49,227 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 07:10:49,228 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 07:10:49,228 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 07:10:49,229 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 07:10:49,229 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 07:10:49,230 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 07:10:49,231 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 07:10:49,231 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 07:10:49,232 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 07:10:49,232 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 07:10:49,233 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 07:10:49,233 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 07:10:49,235 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 07:10:49,235 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_be180448-1754-4549-ac2c-422d1ff3b4eb/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-20 07:10:49,261 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 07:10:49,261 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 07:10:49,262 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 07:10:49,262 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 07:10:49,262 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 07:10:49,262 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 07:10:49,262 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 07:10:49,262 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 07:10:49,263 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 07:10:49,263 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 07:10:49,263 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-20 07:10:49,263 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 07:10:49,263 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-20 07:10:49,263 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 07:10:49,264 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 07:10:49,264 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 07:10:49,264 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-20 07:10:49,264 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 07:10:49,264 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 07:10:49,264 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 07:10:49,265 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 07:10:49,265 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 07:10:49,265 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 07:10:49,265 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 07:10:49,265 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-20 07:10:49,265 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-20 07:10:49,265 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-20 07:10:49,266 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-20 07:10:49,266 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_be180448-1754-4549-ac2c-422d1ff3b4eb/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 -> 04a56f9ad65a098e527ed274929f036070b1f0d1 [2019-11-20 07:10:49,426 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 07:10:49,436 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 07:10:49,441 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 07:10:49,447 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 07:10:49,447 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 07:10:49,448 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_be180448-1754-4549-ac2c-422d1ff3b4eb/bin/uautomizer/../../sv-benchmarks/c/array-fpi/s5if.c [2019-11-20 07:10:49,505 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_be180448-1754-4549-ac2c-422d1ff3b4eb/bin/uautomizer/data/69fd1e3d4/08431e6c9d4e4e71abe572afd053d259/FLAG5a47c5167 [2019-11-20 07:10:49,864 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 07:10:49,865 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_be180448-1754-4549-ac2c-422d1ff3b4eb/sv-benchmarks/c/array-fpi/s5if.c [2019-11-20 07:10:49,871 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_be180448-1754-4549-ac2c-422d1ff3b4eb/bin/uautomizer/data/69fd1e3d4/08431e6c9d4e4e71abe572afd053d259/FLAG5a47c5167 [2019-11-20 07:10:50,236 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_be180448-1754-4549-ac2c-422d1ff3b4eb/bin/uautomizer/data/69fd1e3d4/08431e6c9d4e4e71abe572afd053d259 [2019-11-20 07:10:50,239 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 07:10:50,240 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 07:10:50,245 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 07:10:50,245 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 07:10:50,249 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 07:10:50,250 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:10:50" (1/1) ... [2019-11-20 07:10:50,253 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a5d217d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:10:50, skipping insertion in model container [2019-11-20 07:10:50,254 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:10:50" (1/1) ... [2019-11-20 07:10:50,264 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 07:10:50,287 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 07:10:50,524 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 07:10:50,625 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 07:10:50,674 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 07:10:50,691 INFO L192 MainTranslator]: Completed translation [2019-11-20 07:10:50,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:10:50 WrapperNode [2019-11-20 07:10:50,693 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 07:10:50,693 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 07:10:50,694 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 07:10:50,694 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 07:10:50,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:10:50" (1/1) ... [2019-11-20 07:10:50,711 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:10:50" (1/1) ... [2019-11-20 07:10:50,736 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 07:10:50,737 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 07:10:50,737 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 07:10:50,737 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 07:10:50,744 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:10:50" (1/1) ... [2019-11-20 07:10:50,745 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:10:50" (1/1) ... [2019-11-20 07:10:50,746 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:10:50" (1/1) ... [2019-11-20 07:10:50,747 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:10:50" (1/1) ... [2019-11-20 07:10:50,752 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:10:50" (1/1) ... [2019-11-20 07:10:50,757 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:10:50" (1/1) ... [2019-11-20 07:10:50,758 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:10:50" (1/1) ... [2019-11-20 07:10:50,761 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 07:10:50,761 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 07:10:50,761 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 07:10:50,761 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 07:10:50,762 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:10:50" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_be180448-1754-4549-ac2c-422d1ff3b4eb/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 07:10:50,823 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-20 07:10:50,823 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-20 07:10:50,824 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-20 07:10:50,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 07:10:50,824 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 07:10:50,824 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-20 07:10:50,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-20 07:10:51,053 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 07:10:51,053 INFO L285 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-20 07:10:51,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:10:51 BoogieIcfgContainer [2019-11-20 07:10:51,055 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 07:10:51,056 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 07:10:51,056 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 07:10:51,059 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 07:10:51,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:10:50" (1/3) ... [2019-11-20 07:10:51,060 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d327b7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:10:51, skipping insertion in model container [2019-11-20 07:10:51,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:10:50" (2/3) ... [2019-11-20 07:10:51,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d327b7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:10:51, skipping insertion in model container [2019-11-20 07:10:51,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:10:51" (3/3) ... [2019-11-20 07:10:51,062 INFO L109 eAbstractionObserver]: Analyzing ICFG s5if.c [2019-11-20 07:10:51,073 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 07:10:51,079 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-20 07:10:51,092 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-20 07:10:51,116 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 07:10:51,117 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-20 07:10:51,117 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 07:10:51,117 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 07:10:51,117 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 07:10:51,117 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 07:10:51,118 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 07:10:51,118 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 07:10:51,132 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-11-20 07:10:51,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-20 07:10:51,139 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:10:51,139 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:10:51,140 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 07:10:51,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:10:51,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1476218026, now seen corresponding path program 1 times [2019-11-20 07:10:51,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 07:10:51,154 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949142357] [2019-11-20 07:10:51,154 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 07:10:51,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:10:51,295 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 07:10:51,296 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949142357] [2019-11-20 07:10:51,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 07:10:51,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-20 07:10:51,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53330325] [2019-11-20 07:10:51,304 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-20 07:10:51,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 07:10:51,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-20 07:10:51,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-20 07:10:51,318 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2019-11-20 07:10:51,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:10:51,332 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2019-11-20 07:10:51,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-20 07:10:51,334 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2019-11-20 07:10:51,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:10:51,341 INFO L225 Difference]: With dead ends: 29 [2019-11-20 07:10:51,342 INFO L226 Difference]: Without dead ends: 13 [2019-11-20 07:10:51,344 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 07:10:51,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-11-20 07:10:51,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-11-20 07:10:51,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-20 07:10:51,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2019-11-20 07:10:51,376 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 9 [2019-11-20 07:10:51,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:10:51,376 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2019-11-20 07:10:51,376 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-20 07:10:51,376 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2019-11-20 07:10:51,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-20 07:10:51,377 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:10:51,377 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:10:51,377 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 07:10:51,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:10:51,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1304115419, now seen corresponding path program 1 times [2019-11-20 07:10:51,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 07:10:51,378 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529581139] [2019-11-20 07:10:51,378 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 07:10:51,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:10:51,461 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 07:10:51,462 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529581139] [2019-11-20 07:10:51,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 07:10:51,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-20 07:10:51,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450244292] [2019-11-20 07:10:51,464 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 07:10:51,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 07:10:51,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 07:10:51,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 07:10:51,465 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 3 states. [2019-11-20 07:10:51,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:10:51,520 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2019-11-20 07:10:51,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 07:10:51,521 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-20 07:10:51,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:10:51,521 INFO L225 Difference]: With dead ends: 23 [2019-11-20 07:10:51,522 INFO L226 Difference]: Without dead ends: 15 [2019-11-20 07:10:51,523 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 07:10:51,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-20 07:10:51,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2019-11-20 07:10:51,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-20 07:10:51,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2019-11-20 07:10:51,526 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9 [2019-11-20 07:10:51,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:10:51,527 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2019-11-20 07:10:51,529 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 07:10:51,529 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2019-11-20 07:10:51,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-20 07:10:51,529 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:10:51,530 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:10:51,530 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 07:10:51,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:10:51,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1358761923, now seen corresponding path program 1 times [2019-11-20 07:10:51,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 07:10:51,531 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593072428] [2019-11-20 07:10:51,532 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 07:10:51,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:10:51,613 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 07:10:51,613 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593072428] [2019-11-20 07:10:51,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 07:10:51,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-20 07:10:51,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196615475] [2019-11-20 07:10:51,614 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 07:10:51,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 07:10:51,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 07:10:51,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-20 07:10:51,615 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 4 states. [2019-11-20 07:10:51,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:10:51,677 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2019-11-20 07:10:51,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-20 07:10:51,678 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-11-20 07:10:51,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:10:51,678 INFO L225 Difference]: With dead ends: 22 [2019-11-20 07:10:51,679 INFO L226 Difference]: Without dead ends: 18 [2019-11-20 07:10:51,679 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 07:10:51,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-20 07:10:51,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 15. [2019-11-20 07:10:51,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-20 07:10:51,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2019-11-20 07:10:51,683 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2019-11-20 07:10:51,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:10:51,683 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2019-11-20 07:10:51,684 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 07:10:51,684 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2019-11-20 07:10:51,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-20 07:10:51,684 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:10:51,685 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:10:51,685 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 07:10:51,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:10:51,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1565637502, now seen corresponding path program 1 times [2019-11-20 07:10:51,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 07:10:51,686 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659595360] [2019-11-20 07:10:51,686 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 07:10:51,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:10:52,054 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 07:10:52,055 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659595360] [2019-11-20 07:10:52,055 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622361367] [2019-11-20 07:10:52,055 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_be180448-1754-4549-ac2c-422d1ff3b4eb/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 07:10:52,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:10:52,130 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-20 07:10:52,139 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:10:52,224 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 07:10:52,225 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:10:52,246 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:10:52,258 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 07:10:52,259 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 07:10:52,279 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:10:52,280 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 07:10:52,281 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:30, output treesize:22 [2019-11-20 07:10:52,324 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 07:10:52,325 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:10:52,350 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:10:52,350 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 07:10:52,351 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2019-11-20 07:10:52,612 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:10:52,612 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 07:10:52,614 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:10:52,658 INFO L567 ElimStorePlain]: treesize reduction 24, result has 68.8 percent of original size [2019-11-20 07:10:52,659 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 07:10:52,660 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:70, output treesize:53 [2019-11-20 07:10:52,721 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 07:10:52,774 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 07:10:52,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 07:10:52,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2019-11-20 07:10:52,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391004373] [2019-11-20 07:10:52,780 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-20 07:10:52,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 07:10:52,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-20 07:10:52,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2019-11-20 07:10:52,781 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 15 states. [2019-11-20 07:10:53,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:10:53,384 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2019-11-20 07:10:53,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 07:10:53,385 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 14 [2019-11-20 07:10:53,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:10:53,388 INFO L225 Difference]: With dead ends: 33 [2019-11-20 07:10:53,388 INFO L226 Difference]: Without dead ends: 24 [2019-11-20 07:10:53,389 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2019-11-20 07:10:53,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-20 07:10:53,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2019-11-20 07:10:53,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-20 07:10:53,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2019-11-20 07:10:53,409 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 14 [2019-11-20 07:10:53,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:10:53,409 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2019-11-20 07:10:53,410 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-20 07:10:53,410 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2019-11-20 07:10:53,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-20 07:10:53,411 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:10:53,411 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:10:53,612 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 07:10:53,612 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 07:10:53,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:10:53,613 INFO L82 PathProgramCache]: Analyzing trace with hash -472130976, now seen corresponding path program 2 times [2019-11-20 07:10:53,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 07:10:53,613 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559238087] [2019-11-20 07:10:53,613 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 07:10:53,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:10:53,712 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 07:10:53,712 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559238087] [2019-11-20 07:10:53,713 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683263193] [2019-11-20 07:10:53,713 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_be180448-1754-4549-ac2c-422d1ff3b4eb/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 07:10:53,765 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 07:10:53,766 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 07:10:53,767 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 07:10:53,769 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:10:53,830 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 07:10:53,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 07:10:53,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2019-11-20 07:10:53,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432853750] [2019-11-20 07:10:53,832 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 07:10:53,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 07:10:53,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 07:10:53,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-20 07:10:53,833 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 10 states. [2019-11-20 07:10:54,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:10:54,056 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-11-20 07:10:54,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-20 07:10:54,057 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2019-11-20 07:10:54,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:10:54,058 INFO L225 Difference]: With dead ends: 31 [2019-11-20 07:10:54,058 INFO L226 Difference]: Without dead ends: 27 [2019-11-20 07:10:54,059 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 07:10:54,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-20 07:10:54,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2019-11-20 07:10:54,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-20 07:10:54,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2019-11-20 07:10:54,066 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 16 [2019-11-20 07:10:54,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:10:54,067 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2019-11-20 07:10:54,067 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 07:10:54,067 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2019-11-20 07:10:54,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-20 07:10:54,068 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:10:54,069 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:10:54,280 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 07:10:54,281 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 07:10:54,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:10:54,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1317941731, now seen corresponding path program 3 times [2019-11-20 07:10:54,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 07:10:54,282 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062397898] [2019-11-20 07:10:54,282 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 07:10:54,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:10:54,370 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 07:10:54,370 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062397898] [2019-11-20 07:10:54,370 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831576120] [2019-11-20 07:10:54,371 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_be180448-1754-4549-ac2c-422d1ff3b4eb/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 07:10:54,426 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-20 07:10:54,426 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 07:10:54,427 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 07:10:54,429 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:10:54,478 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 07:10:54,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 07:10:54,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2019-11-20 07:10:54,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819073747] [2019-11-20 07:10:54,479 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 07:10:54,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 07:10:54,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 07:10:54,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-11-20 07:10:54,480 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 10 states. [2019-11-20 07:10:54,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:10:54,618 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2019-11-20 07:10:54,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-20 07:10:54,618 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2019-11-20 07:10:54,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:10:54,620 INFO L225 Difference]: With dead ends: 35 [2019-11-20 07:10:54,620 INFO L226 Difference]: Without dead ends: 23 [2019-11-20 07:10:54,620 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 07:10:54,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-20 07:10:54,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2019-11-20 07:10:54,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-20 07:10:54,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2019-11-20 07:10:54,625 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 17 [2019-11-20 07:10:54,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:10:54,626 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2019-11-20 07:10:54,626 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 07:10:54,626 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2019-11-20 07:10:54,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-20 07:10:54,627 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:10:54,627 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:10:54,827 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 07:10:54,828 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 07:10:54,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:10:54,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1991965825, now seen corresponding path program 4 times [2019-11-20 07:10:54,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 07:10:54,829 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836938129] [2019-11-20 07:10:54,829 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 07:10:54,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:10:55,512 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 07:10:55,513 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836938129] [2019-11-20 07:10:55,513 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831625950] [2019-11-20 07:10:55,513 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_be180448-1754-4549-ac2c-422d1ff3b4eb/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 07:10:55,576 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 07:10:55,576 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 07:10:55,578 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2019-11-20 07:10:55,580 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:10:55,596 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 07:10:55,597 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:10:55,624 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:10:55,632 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 07:10:55,633 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 07:10:55,652 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:10:55,652 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 07:10:55,653 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2019-11-20 07:10:55,704 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 07:10:55,705 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:10:55,725 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:10:55,726 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 07:10:55,726 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:29 [2019-11-20 07:10:55,855 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:10:55,856 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 07:10:55,857 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:10:55,915 INFO L567 ElimStorePlain]: treesize reduction 36, result has 55.6 percent of original size [2019-11-20 07:10:55,916 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 07:10:55,916 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:45 [2019-11-20 07:10:56,282 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:10:56,283 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 07:10:56,284 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:10:56,363 INFO L567 ElimStorePlain]: treesize reduction 80, result has 46.3 percent of original size [2019-11-20 07:10:56,364 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 07:10:56,364 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:86, output treesize:69 [2019-11-20 07:10:56,670 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:10:56,671 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 07:10:56,675 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:10:56,740 INFO L567 ElimStorePlain]: treesize reduction 190, result has 28.6 percent of original size [2019-11-20 07:10:56,742 INFO L496 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-11-20 07:10:56,742 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:113, output treesize:66 [2019-11-20 07:10:56,829 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 07:10:56,893 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 07:10:56,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 07:10:56,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2019-11-20 07:10:56,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980898417] [2019-11-20 07:10:56,895 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-20 07:10:56,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 07:10:56,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-20 07:10:56,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2019-11-20 07:10:56,896 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 29 states. [2019-11-20 07:10:58,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:10:58,245 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2019-11-20 07:10:58,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-20 07:10:58,246 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 19 [2019-11-20 07:10:58,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:10:58,247 INFO L225 Difference]: With dead ends: 43 [2019-11-20 07:10:58,247 INFO L226 Difference]: Without dead ends: 32 [2019-11-20 07:10:58,249 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=206, Invalid=1434, Unknown=0, NotChecked=0, Total=1640 [2019-11-20 07:10:58,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-20 07:10:58,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2019-11-20 07:10:58,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-20 07:10:58,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-11-20 07:10:58,264 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 19 [2019-11-20 07:10:58,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:10:58,267 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-11-20 07:10:58,267 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-20 07:10:58,267 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-11-20 07:10:58,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-20 07:10:58,269 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:10:58,269 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:10:58,470 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 07:10:58,470 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 07:10:58,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:10:58,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1189058463, now seen corresponding path program 5 times [2019-11-20 07:10:58,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 07:10:58,471 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546606678] [2019-11-20 07:10:58,471 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 07:10:58,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:10:58,555 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 07:10:58,555 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546606678] [2019-11-20 07:10:58,555 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407973303] [2019-11-20 07:10:58,555 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_be180448-1754-4549-ac2c-422d1ff3b4eb/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 07:10:58,598 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-20 07:10:58,598 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 07:10:58,599 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 07:10:58,601 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:10:58,669 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 07:10:58,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 07:10:58,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2019-11-20 07:10:58,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585226343] [2019-11-20 07:10:58,670 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-20 07:10:58,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 07:10:58,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-20 07:10:58,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2019-11-20 07:10:58,671 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 13 states. [2019-11-20 07:10:58,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:10:58,923 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2019-11-20 07:10:58,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-20 07:10:58,924 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2019-11-20 07:10:58,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:10:58,925 INFO L225 Difference]: With dead ends: 39 [2019-11-20 07:10:58,925 INFO L226 Difference]: Without dead ends: 35 [2019-11-20 07:10:58,926 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2019-11-20 07:10:58,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-20 07:10:58,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2019-11-20 07:10:58,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-20 07:10:58,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2019-11-20 07:10:58,934 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 21 [2019-11-20 07:10:58,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:10:58,935 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2019-11-20 07:10:58,935 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-20 07:10:58,935 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2019-11-20 07:10:58,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-20 07:10:58,936 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:10:58,936 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:10:59,140 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 07:10:59,140 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 07:10:59,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:10:59,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1846717952, now seen corresponding path program 6 times [2019-11-20 07:10:59,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 07:10:59,141 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523229710] [2019-11-20 07:10:59,141 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 07:10:59,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:10:59,261 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 07:10:59,261 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523229710] [2019-11-20 07:10:59,262 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941695320] [2019-11-20 07:10:59,262 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_be180448-1754-4549-ac2c-422d1ff3b4eb/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 07:10:59,336 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-11-20 07:10:59,336 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 07:10:59,337 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 07:10:59,338 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:10:59,408 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 07:10:59,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 07:10:59,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2019-11-20 07:10:59,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358406422] [2019-11-20 07:10:59,409 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-20 07:10:59,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 07:10:59,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-20 07:10:59,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2019-11-20 07:10:59,410 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 13 states. [2019-11-20 07:10:59,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:10:59,590 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2019-11-20 07:10:59,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-20 07:10:59,591 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 22 [2019-11-20 07:10:59,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:10:59,592 INFO L225 Difference]: With dead ends: 43 [2019-11-20 07:10:59,592 INFO L226 Difference]: Without dead ends: 28 [2019-11-20 07:10:59,593 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 07:10:59,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-20 07:10:59,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2019-11-20 07:10:59,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-20 07:10:59,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2019-11-20 07:10:59,598 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2019-11-20 07:10:59,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:10:59,598 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2019-11-20 07:10:59,598 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-20 07:10:59,598 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2019-11-20 07:10:59,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-20 07:10:59,599 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:10:59,599 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:10:59,803 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 07:10:59,804 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 07:10:59,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:10:59,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1106368034, now seen corresponding path program 7 times [2019-11-20 07:10:59,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 07:10:59,805 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470785257] [2019-11-20 07:10:59,805 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 07:10:59,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:11:00,502 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 07:11:00,502 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470785257] [2019-11-20 07:11:00,502 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071729715] [2019-11-20 07:11:00,502 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_be180448-1754-4549-ac2c-422d1ff3b4eb/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 07:11:00,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:11:00,539 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 41 conjunts are in the unsatisfiable core [2019-11-20 07:11:00,541 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:11:00,554 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 07:11:00,555 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:11:00,564 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:11:00,571 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 07:11:00,571 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 07:11:00,578 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:11:00,579 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 07:11:00,579 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2019-11-20 07:11:00,620 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 07:11:00,621 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:11:00,636 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:11:00,637 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 07:11:00,637 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:29 [2019-11-20 07:11:00,748 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:11:00,748 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 07:11:00,749 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:11:00,783 INFO L567 ElimStorePlain]: treesize reduction 24, result has 60.0 percent of original size [2019-11-20 07:11:00,784 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 07:11:00,784 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:36 [2019-11-20 07:11:00,912 INFO L343 Elim1Store]: treesize reduction 10, result has 87.7 percent of original size [2019-11-20 07:11:00,913 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 07:11:00,914 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:11:00,972 INFO L567 ElimStorePlain]: treesize reduction 54, result has 47.1 percent of original size [2019-11-20 07:11:00,972 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 07:11:00,972 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:52, output treesize:48 [2019-11-20 07:11:01,208 INFO L343 Elim1Store]: treesize reduction 32, result has 56.2 percent of original size [2019-11-20 07:11:01,208 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 07:11:01,210 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:11:01,242 INFO L567 ElimStorePlain]: treesize reduction 20, result has 73.0 percent of original size [2019-11-20 07:11:01,242 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 07:11:01,242 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:79, output treesize:54 [2019-11-20 07:11:02,569 WARN L191 SmtUtils]: Spent 1.29 s on a formula simplification that was a NOOP. DAG size: 34 [2019-11-20 07:11:03,891 WARN L191 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 40 [2019-11-20 07:11:03,970 INFO L343 Elim1Store]: treesize reduction 32, result has 75.2 percent of original size [2019-11-20 07:11:03,971 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 80 treesize of output 171 [2019-11-20 07:11:03,972 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:11:04,019 INFO L567 ElimStorePlain]: treesize reduction 108, result has 37.6 percent of original size [2019-11-20 07:11:04,019 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 07:11:04,020 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:90, output treesize:65 [2019-11-20 07:11:08,081 WARN L191 SmtUtils]: Spent 4.02 s on a formula simplification that was a NOOP. DAG size: 41 [2019-11-20 07:11:10,097 WARN L191 SmtUtils]: Spent 1.94 s on a formula simplification that was a NOOP. DAG size: 47 [2019-11-20 07:11:10,251 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 69 [2019-11-20 07:11:10,252 INFO L343 Elim1Store]: treesize reduction 32, result has 84.1 percent of original size [2019-11-20 07:11:10,252 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 91 treesize of output 257 [2019-11-20 07:11:10,254 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:11:10,330 INFO L567 ElimStorePlain]: treesize reduction 112, result has 43.4 percent of original size [2019-11-20 07:11:10,331 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 07:11:10,331 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:101, output treesize:86 [2019-11-20 07:11:10,403 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 07:11:10,466 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 07:11:10,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 07:11:10,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 35 [2019-11-20 07:11:10,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088846480] [2019-11-20 07:11:10,467 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-20 07:11:10,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 07:11:10,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-20 07:11:10,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1082, Unknown=0, NotChecked=0, Total=1190 [2019-11-20 07:11:10,469 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 35 states. [2019-11-20 07:11:15,349 WARN L191 SmtUtils]: Spent 3.50 s on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2019-11-20 07:11:20,213 WARN L191 SmtUtils]: Spent 4.76 s on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2019-11-20 07:11:24,210 WARN L191 SmtUtils]: Spent 3.96 s on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2019-11-20 07:11:24,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:11:24,413 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2019-11-20 07:11:24,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-20 07:11:24,414 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 24 [2019-11-20 07:11:24,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:11:24,414 INFO L225 Difference]: With dead ends: 60 [2019-11-20 07:11:24,415 INFO L226 Difference]: Without dead ends: 44 [2019-11-20 07:11:24,416 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 22.7s TimeCoverageRelationStatistics Valid=248, Invalid=2302, Unknown=0, NotChecked=0, Total=2550 [2019-11-20 07:11:24,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-20 07:11:24,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 33. [2019-11-20 07:11:24,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-20 07:11:24,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2019-11-20 07:11:24,424 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 24 [2019-11-20 07:11:24,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:11:24,424 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2019-11-20 07:11:24,424 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-20 07:11:24,424 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2019-11-20 07:11:24,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-20 07:11:24,425 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:11:24,425 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:11:24,626 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 07:11:24,626 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 07:11:24,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:11:24,626 INFO L82 PathProgramCache]: Analyzing trace with hash -426309664, now seen corresponding path program 1 times [2019-11-20 07:11:24,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 07:11:24,627 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036720572] [2019-11-20 07:11:24,627 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 07:11:24,636 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-20 07:11:24,637 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [301104493] [2019-11-20 07:11:24,637 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_be180448-1754-4549-ac2c-422d1ff3b4eb/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 07:11:24,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:11:24,688 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-20 07:11:24,690 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:11:24,695 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 07:11:24,695 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:11:24,707 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:11:24,707 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 07:11:24,707 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2019-11-20 07:11:24,724 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 15 treesize of output 11 [2019-11-20 07:11:24,724 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:11:24,731 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:11:24,731 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 07:11:24,732 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2019-11-20 07:11:24,776 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:11:24,777 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 07:11:24,777 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:11:24,805 INFO L567 ElimStorePlain]: treesize reduction 30, result has 48.3 percent of original size [2019-11-20 07:11:24,806 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 07:11:24,806 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:28 [2019-11-20 07:11:24,862 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:11:24,862 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 07:11:24,863 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:11:24,885 INFO L567 ElimStorePlain]: treesize reduction 72, result has 30.1 percent of original size [2019-11-20 07:11:24,885 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 07:11:24,886 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:56, output treesize:27 [2019-11-20 07:11:24,931 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:11:24,932 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 30 treesize of output 24 [2019-11-20 07:11:24,932 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:11:24,936 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:11:24,936 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 07:11:24,937 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:33, output treesize:3 [2019-11-20 07:11:24,951 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 07:11:24,951 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036720572] [2019-11-20 07:11:24,951 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-20 07:11:24,951 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301104493] [2019-11-20 07:11:24,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-20 07:11:24,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-11-20 07:11:24,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446042383] [2019-11-20 07:11:24,952 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-20 07:11:24,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 07:11:24,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-20 07:11:24,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2019-11-20 07:11:24,953 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 11 states. [2019-11-20 07:11:25,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:11:25,237 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2019-11-20 07:11:25,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 07:11:25,239 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2019-11-20 07:11:25,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:11:25,240 INFO L225 Difference]: With dead ends: 46 [2019-11-20 07:11:25,240 INFO L226 Difference]: Without dead ends: 37 [2019-11-20 07:11:25,241 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2019-11-20 07:11:25,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-20 07:11:25,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2019-11-20 07:11:25,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-20 07:11:25,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2019-11-20 07:11:25,248 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 24 [2019-11-20 07:11:25,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:11:25,249 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2019-11-20 07:11:25,249 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-20 07:11:25,249 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2019-11-20 07:11:25,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-20 07:11:25,250 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:11:25,250 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:11:25,450 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 07:11:25,451 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 07:11:25,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:11:25,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1700299324, now seen corresponding path program 8 times [2019-11-20 07:11:25,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 07:11:25,451 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566192992] [2019-11-20 07:11:25,451 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 07:11:25,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:11:25,536 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 07:11:25,536 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566192992] [2019-11-20 07:11:25,536 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711092805] [2019-11-20 07:11:25,536 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_be180448-1754-4549-ac2c-422d1ff3b4eb/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 07:11:25,577 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 07:11:25,578 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 07:11:25,578 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 07:11:25,580 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:11:25,651 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 07:11:25,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 07:11:25,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2019-11-20 07:11:25,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000440145] [2019-11-20 07:11:25,652 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-20 07:11:25,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 07:11:25,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-20 07:11:25,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-11-20 07:11:25,652 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 16 states. [2019-11-20 07:11:25,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:11:25,916 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2019-11-20 07:11:25,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-20 07:11:25,916 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 26 [2019-11-20 07:11:25,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:11:25,917 INFO L225 Difference]: With dead ends: 47 [2019-11-20 07:11:25,917 INFO L226 Difference]: Without dead ends: 43 [2019-11-20 07:11:25,918 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2019-11-20 07:11:25,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-20 07:11:25,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2019-11-20 07:11:25,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-20 07:11:25,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2019-11-20 07:11:25,925 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 26 [2019-11-20 07:11:25,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:11:25,926 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2019-11-20 07:11:25,926 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-20 07:11:25,926 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2019-11-20 07:11:25,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-20 07:11:25,927 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:11:25,927 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:11:26,130 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 07:11:26,130 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 07:11:26,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:11:26,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1307941697, now seen corresponding path program 9 times [2019-11-20 07:11:26,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 07:11:26,131 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196736736] [2019-11-20 07:11:26,131 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 07:11:26,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:11:26,253 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 07:11:26,253 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196736736] [2019-11-20 07:11:26,253 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521800387] [2019-11-20 07:11:26,253 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_be180448-1754-4549-ac2c-422d1ff3b4eb/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 07:11:26,319 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-20 07:11:26,319 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 07:11:26,320 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 07:11:26,322 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:11:26,391 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 07:11:26,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 07:11:26,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2019-11-20 07:11:26,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791399082] [2019-11-20 07:11:26,392 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-20 07:11:26,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 07:11:26,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-20 07:11:26,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-11-20 07:11:26,393 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 16 states. [2019-11-20 07:11:26,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:11:26,608 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2019-11-20 07:11:26,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-20 07:11:26,609 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 27 [2019-11-20 07:11:26,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:11:26,609 INFO L225 Difference]: With dead ends: 51 [2019-11-20 07:11:26,609 INFO L226 Difference]: Without dead ends: 33 [2019-11-20 07:11:26,610 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 07:11:26,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-20 07:11:26,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2019-11-20 07:11:26,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-20 07:11:26,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2019-11-20 07:11:26,619 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 27 [2019-11-20 07:11:26,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:11:26,621 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2019-11-20 07:11:26,622 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-20 07:11:26,622 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2019-11-20 07:11:26,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-20 07:11:26,625 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:11:26,626 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:11:26,829 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 07:11:26,830 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 07:11:26,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:11:26,830 INFO L82 PathProgramCache]: Analyzing trace with hash 311885347, now seen corresponding path program 10 times [2019-11-20 07:11:26,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 07:11:26,831 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976227343] [2019-11-20 07:11:26,831 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 07:11:26,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:11:27,626 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 07:11:27,626 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976227343] [2019-11-20 07:11:27,626 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385147195] [2019-11-20 07:11:27,626 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_be180448-1754-4549-ac2c-422d1ff3b4eb/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 07:11:27,674 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 07:11:27,674 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 07:11:27,676 WARN L253 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 49 conjunts are in the unsatisfiable core [2019-11-20 07:11:27,678 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:11:27,692 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 07:11:27,692 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:11:27,700 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:11:27,704 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 07:11:27,704 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 07:11:27,721 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:11:27,721 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 07:11:27,721 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2019-11-20 07:11:27,760 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 07:11:27,760 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:11:27,769 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:11:27,770 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 07:11:27,770 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:29 [2019-11-20 07:11:27,929 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:11:27,930 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 07:11:27,930 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:11:27,964 INFO L567 ElimStorePlain]: treesize reduction 36, result has 55.6 percent of original size [2019-11-20 07:11:27,964 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 07:11:27,965 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:45 [2019-11-20 07:11:28,132 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:11:28,132 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 07:11:28,133 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:11:28,185 INFO L567 ElimStorePlain]: treesize reduction 72, result has 45.9 percent of original size [2019-11-20 07:11:28,186 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 07:11:28,186 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:65, output treesize:61 [2019-11-20 07:11:28,461 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2019-11-20 07:11:28,462 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:11:28,462 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 07:11:28,463 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:11:28,582 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2019-11-20 07:11:28,583 INFO L567 ElimStorePlain]: treesize reduction 108, result has 41.6 percent of original size [2019-11-20 07:11:28,584 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 07:11:28,584 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:77 [2019-11-20 07:11:29,239 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:11:29,240 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 07:11:29,241 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:11:29,269 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:11:29,270 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 07:11:29,270 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:118, output treesize:93 [2019-11-20 07:11:29,591 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:11:29,591 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 99 treesize of output 337 [2019-11-20 07:11:29,593 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:11:29,634 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:11:29,635 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 07:11:29,635 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:134, output treesize:109 [2019-11-20 07:11:30,087 WARN L191 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2019-11-20 07:11:30,088 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:11:30,088 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 07:11:30,091 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:11:30,271 WARN L191 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 69 [2019-11-20 07:11:30,272 INFO L567 ElimStorePlain]: treesize reduction 612, result has 17.6 percent of original size [2019-11-20 07:11:30,272 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 07:11:30,273 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:150, output treesize:131 [2019-11-20 07:11:30,916 WARN L191 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2019-11-20 07:11:30,916 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:11:30,917 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 120 treesize of output 572 [2019-11-20 07:11:30,921 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:11:31,200 WARN L191 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 63 [2019-11-20 07:11:31,201 INFO L567 ElimStorePlain]: treesize reduction 873, result has 11.2 percent of original size [2019-11-20 07:11:31,305 INFO L496 ElimStorePlain]: Start of recursive call 1: 10 dim-0 vars, 1 dim-2 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-11-20 07:11:31,305 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 11 variables, input treesize:168, output treesize:97 [2019-11-20 07:11:31,537 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 07:11:31,649 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 07:11:31,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 07:11:31,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 47 [2019-11-20 07:11:31,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160883920] [2019-11-20 07:11:31,651 INFO L442 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-11-20 07:11:31,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 07:11:31,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-11-20 07:11:31,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=2011, Unknown=0, NotChecked=0, Total=2162 [2019-11-20 07:11:31,653 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 47 states. [2019-11-20 07:11:33,795 WARN L191 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 69 [2019-11-20 07:11:34,026 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 74 [2019-11-20 07:11:35,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:11:35,332 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2019-11-20 07:11:35,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-20 07:11:35,332 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 29 [2019-11-20 07:11:35,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:11:35,333 INFO L225 Difference]: With dead ends: 65 [2019-11-20 07:11:35,333 INFO L226 Difference]: Without dead ends: 48 [2019-11-20 07:11:35,335 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=374, Invalid=4318, Unknown=0, NotChecked=0, Total=4692 [2019-11-20 07:11:35,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-20 07:11:35,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2019-11-20 07:11:35,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-20 07:11:35,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2019-11-20 07:11:35,345 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 29 [2019-11-20 07:11:35,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:11:35,345 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2019-11-20 07:11:35,345 INFO L463 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-11-20 07:11:35,345 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2019-11-20 07:11:35,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-20 07:11:35,346 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:11:35,346 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:11:35,547 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 07:11:35,547 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 07:11:35,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:11:35,548 INFO L82 PathProgramCache]: Analyzing trace with hash 879440005, now seen corresponding path program 11 times [2019-11-20 07:11:35,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 07:11:35,548 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175958403] [2019-11-20 07:11:35,548 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 07:11:35,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:11:35,718 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 07:11:35,718 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175958403] [2019-11-20 07:11:35,718 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828383516] [2019-11-20 07:11:35,718 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_be180448-1754-4549-ac2c-422d1ff3b4eb/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 07:11:35,792 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-20 07:11:35,792 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 07:11:35,793 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-20 07:11:35,795 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:11:35,894 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 07:11:35,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 07:11:35,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2019-11-20 07:11:35,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888810694] [2019-11-20 07:11:35,894 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-20 07:11:35,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 07:11:35,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-20 07:11:35,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2019-11-20 07:11:35,895 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 19 states. [2019-11-20 07:11:36,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:11:36,315 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2019-11-20 07:11:36,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-20 07:11:36,316 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 31 [2019-11-20 07:11:36,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:11:36,317 INFO L225 Difference]: With dead ends: 55 [2019-11-20 07:11:36,317 INFO L226 Difference]: Without dead ends: 51 [2019-11-20 07:11:36,317 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=614, Unknown=0, NotChecked=0, Total=812 [2019-11-20 07:11:36,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-20 07:11:36,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2019-11-20 07:11:36,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-20 07:11:36,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2019-11-20 07:11:36,329 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 31 [2019-11-20 07:11:36,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:11:36,329 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2019-11-20 07:11:36,330 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-20 07:11:36,330 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2019-11-20 07:11:36,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-20 07:11:36,331 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:11:36,331 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:11:36,535 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 07:11:36,536 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 07:11:36,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:11:36,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1393842980, now seen corresponding path program 12 times [2019-11-20 07:11:36,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 07:11:36,536 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156456714] [2019-11-20 07:11:36,536 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 07:11:36,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:11:36,684 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 07:11:36,685 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156456714] [2019-11-20 07:11:36,685 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115348674] [2019-11-20 07:11:36,685 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_be180448-1754-4549-ac2c-422d1ff3b4eb/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 07:11:36,771 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-11-20 07:11:36,771 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 07:11:36,772 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-20 07:11:36,774 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:11:36,881 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 07:11:36,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 07:11:36,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2019-11-20 07:11:36,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960547395] [2019-11-20 07:11:36,882 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-20 07:11:36,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 07:11:36,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-20 07:11:36,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2019-11-20 07:11:36,883 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 19 states. [2019-11-20 07:11:37,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:11:37,129 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2019-11-20 07:11:37,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-20 07:11:37,130 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 32 [2019-11-20 07:11:37,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:11:37,130 INFO L225 Difference]: With dead ends: 59 [2019-11-20 07:11:37,130 INFO L226 Difference]: Without dead ends: 38 [2019-11-20 07:11:37,131 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 07:11:37,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-20 07:11:37,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2019-11-20 07:11:37,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-20 07:11:37,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2019-11-20 07:11:37,138 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 32 [2019-11-20 07:11:37,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:11:37,138 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2019-11-20 07:11:37,138 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-20 07:11:37,139 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2019-11-20 07:11:37,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-20 07:11:37,139 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:11:37,143 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:11:37,346 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 07:11:37,347 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 07:11:37,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:11:37,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1635696442, now seen corresponding path program 13 times [2019-11-20 07:11:37,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 07:11:37,347 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995368959] [2019-11-20 07:11:37,348 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 07:11:37,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:11:38,333 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 07:11:38,334 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995368959] [2019-11-20 07:11:38,336 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584761598] [2019-11-20 07:11:38,336 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_be180448-1754-4549-ac2c-422d1ff3b4eb/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 07:11:38,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:11:38,385 WARN L253 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 57 conjunts are in the unsatisfiable core [2019-11-20 07:11:38,387 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:11:38,393 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 07:11:38,393 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:11:38,408 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:11:38,411 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 07:11:38,411 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 07:11:38,418 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:11:38,419 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 07:11:38,419 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2019-11-20 07:11:38,470 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 07:11:38,471 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:11:38,483 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:11:38,483 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 07:11:38,484 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:29 [2019-11-20 07:11:38,591 INFO L343 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2019-11-20 07:11:38,591 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 07:11:38,592 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:11:38,607 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:11:38,607 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 07:11:38,607 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:41 [2019-11-20 07:11:38,766 INFO L343 Elim1Store]: treesize reduction 10, result has 87.7 percent of original size [2019-11-20 07:11:38,766 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 07:11:38,767 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:11:38,802 INFO L567 ElimStorePlain]: treesize reduction 54, result has 45.5 percent of original size [2019-11-20 07:11:38,802 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 07:11:38,803 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:45 [2019-11-20 07:11:39,019 INFO L343 Elim1Store]: treesize reduction 32, result has 77.5 percent of original size [2019-11-20 07:11:39,019 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 48 treesize of output 140 [2019-11-20 07:11:39,020 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:11:39,087 INFO L567 ElimStorePlain]: treesize reduction 84, result has 39.1 percent of original size [2019-11-20 07:11:39,088 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 07:11:39,088 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:58, output treesize:54 [2019-11-20 07:11:39,385 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 42 [2019-11-20 07:11:39,385 INFO L343 Elim1Store]: treesize reduction 114, result has 51.7 percent of original size [2019-11-20 07:11:39,385 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 60 treesize of output 155 [2019-11-20 07:11:39,386 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:11:39,466 INFO L567 ElimStorePlain]: treesize reduction 84, result has 45.1 percent of original size [2019-11-20 07:11:39,467 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 07:11:39,467 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:73, output treesize:69 [2019-11-20 07:11:40,040 INFO L343 Elim1Store]: treesize reduction 112, result has 38.1 percent of original size [2019-11-20 07:11:40,041 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 07:11:40,042 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:11:40,112 INFO L567 ElimStorePlain]: treesize reduction 80, result has 47.4 percent of original size [2019-11-20 07:11:40,113 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 07:11:40,113 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:97, output treesize:72 [2019-11-20 07:11:41,391 WARN L191 SmtUtils]: Spent 1.19 s on a formula simplification that was a NOOP. DAG size: 40 [2019-11-20 07:11:41,958 WARN L191 SmtUtils]: Spent 504.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2019-11-20 07:11:42,103 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 67 [2019-11-20 07:11:42,103 INFO L343 Elim1Store]: treesize reduction 112, result has 57.7 percent of original size [2019-11-20 07:11:42,104 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 07:11:42,106 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:11:42,194 INFO L567 ElimStorePlain]: treesize reduction 184, result has 31.1 percent of original size [2019-11-20 07:11:42,194 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 07:11:42,194 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:108, output treesize:83 [2019-11-20 07:11:44,475 WARN L191 SmtUtils]: Spent 2.21 s on a formula simplification that was a NOOP. DAG size: 47 [2019-11-20 07:11:45,916 WARN L191 SmtUtils]: Spent 1.37 s on a formula simplification that was a NOOP. DAG size: 53 [2019-11-20 07:11:46,148 WARN L191 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 99 [2019-11-20 07:11:46,148 INFO L343 Elim1Store]: treesize reduction 112, result has 69.3 percent of original size [2019-11-20 07:11:46,149 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 109 treesize of output 365 [2019-11-20 07:11:46,151 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:11:46,263 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 51 [2019-11-20 07:11:46,263 INFO L567 ElimStorePlain]: treesize reduction 456, result has 18.6 percent of original size [2019-11-20 07:11:46,264 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 07:11:46,264 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:119, output treesize:104 [2019-11-20 07:11:47,783 WARN L191 SmtUtils]: Spent 1.44 s on a formula simplification that was a NOOP. DAG size: 55 [2019-11-20 07:11:49,388 WARN L191 SmtUtils]: Spent 1.44 s on a formula simplification that was a NOOP. DAG size: 61 [2019-11-20 07:11:49,798 WARN L191 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 135 [2019-11-20 07:11:49,798 INFO L343 Elim1Store]: treesize reduction 112, result has 76.7 percent of original size [2019-11-20 07:11:49,799 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 130 treesize of output 497 [2019-11-20 07:11:49,802 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:11:49,943 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 55 [2019-11-20 07:11:49,944 INFO L567 ElimStorePlain]: treesize reduction 430, result has 19.6 percent of original size [2019-11-20 07:11:49,944 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 07:11:49,945 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:140, output treesize:105 [2019-11-20 07:11:57,272 WARN L191 SmtUtils]: Spent 7.24 s on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2019-11-20 07:12:00,561 WARN L191 SmtUtils]: Spent 3.20 s on a formula simplification that was a NOOP. DAG size: 59 [2019-11-20 07:12:00,949 WARN L191 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 135 [2019-11-20 07:12:00,950 INFO L343 Elim1Store]: treesize reduction 112, result has 76.7 percent of original size [2019-11-20 07:12:00,950 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 120 treesize of output 495 [2019-11-20 07:12:00,953 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:12:01,090 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 56 [2019-11-20 07:12:01,090 INFO L567 ElimStorePlain]: treesize reduction 596, result has 16.2 percent of original size [2019-11-20 07:12:01,091 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 07:12:01,091 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:115 [2019-11-20 07:12:01,204 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 07:12:01,300 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 07:12:01,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 07:12:01,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25] total 51 [2019-11-20 07:12:01,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509300742] [2019-11-20 07:12:01,300 INFO L442 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-11-20 07:12:01,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 07:12:01,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-11-20 07:12:01,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=2392, Unknown=0, NotChecked=0, Total=2550 [2019-11-20 07:12:01,302 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand 51 states. [2019-11-20 07:12:04,671 WARN L191 SmtUtils]: Spent 2.22 s on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2019-11-20 07:12:04,840 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 48 [2019-11-20 07:12:08,120 WARN L191 SmtUtils]: Spent 3.14 s on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2019-11-20 07:12:10,363 WARN L191 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2019-11-20 07:12:10,655 WARN L191 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 49 [2019-11-20 07:12:15,071 WARN L191 SmtUtils]: Spent 3.78 s on a formula simplification. DAG size of input: 81 DAG size of output: 55 [2019-11-20 07:12:18,002 WARN L191 SmtUtils]: Spent 2.83 s on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2019-11-20 07:12:20,517 WARN L191 SmtUtils]: Spent 2.46 s on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2019-11-20 07:12:20,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:12:20,814 INFO L93 Difference]: Finished difference Result 84 states and 100 transitions. [2019-11-20 07:12:20,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-20 07:12:20,815 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 34 [2019-11-20 07:12:20,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:12:20,815 INFO L225 Difference]: With dead ends: 84 [2019-11-20 07:12:20,815 INFO L226 Difference]: Without dead ends: 62 [2019-11-20 07:12:20,817 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1445 ImplicationChecksByTransitivity, 39.6s TimeCoverageRelationStatistics Valid=363, Invalid=5187, Unknown=0, NotChecked=0, Total=5550 [2019-11-20 07:12:20,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-20 07:12:20,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 49. [2019-11-20 07:12:20,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-20 07:12:20,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2019-11-20 07:12:20,828 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 34 [2019-11-20 07:12:20,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:12:20,829 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2019-11-20 07:12:20,829 INFO L463 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-11-20 07:12:20,829 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2019-11-20 07:12:20,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-20 07:12:20,830 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:12:20,830 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:12:21,033 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 07:12:21,033 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 07:12:21,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:12:21,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1979212484, now seen corresponding path program 2 times [2019-11-20 07:12:21,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 07:12:21,034 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622242983] [2019-11-20 07:12:21,034 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 07:12:21,041 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-20 07:12:21,041 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2101030069] [2019-11-20 07:12:21,041 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_be180448-1754-4549-ac2c-422d1ff3b4eb/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 07:12:21,089 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 07:12:21,089 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 07:12:21,090 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 33 conjunts are in the unsatisfiable core [2019-11-20 07:12:21,092 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:12:21,129 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 07:12:21,129 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:12:21,136 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:12:21,137 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 07:12:21,137 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2019-11-20 07:12:21,169 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 07:12:21,170 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 07:12:21,170 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:12:21,179 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:12:21,180 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 07:12:21,180 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:32 [2019-11-20 07:12:21,243 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 07:12:21,244 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 07:12:21,246 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 07:12:21,247 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 07:12:21,247 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 07:12:21,248 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:12:21,259 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:12:21,259 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 07:12:21,260 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:60, output treesize:35 [2019-11-20 07:12:21,304 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 07:12:21,305 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 07:12:21,306 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 07:12:21,307 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 07:12:21,308 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 07:12:21,309 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:12:21,325 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:12:21,326 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 07:12:21,326 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:60, output treesize:35 [2019-11-20 07:12:21,375 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 07:12:21,376 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 07:12:21,377 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 07:12:21,378 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 07:12:21,379 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 07:12:21,379 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:12:21,390 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:12:21,391 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 07:12:21,391 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:60, output treesize:30 [2019-11-20 07:12:21,457 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 07:12:21,458 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:12:21,459 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 07:12:21,459 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:12:21,462 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:12:21,463 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 07:12:21,463 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:3 [2019-11-20 07:12:21,483 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 18 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-20 07:12:21,483 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622242983] [2019-11-20 07:12:21,483 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-20 07:12:21,483 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101030069] [2019-11-20 07:12:21,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-20 07:12:21,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-11-20 07:12:21,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33371855] [2019-11-20 07:12:21,484 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-20 07:12:21,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 07:12:21,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-20 07:12:21,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-11-20 07:12:21,485 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 15 states. [2019-11-20 07:12:24,236 WARN L191 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2019-11-20 07:12:26,281 WARN L191 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2019-11-20 07:12:26,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:12:26,343 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2019-11-20 07:12:26,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-20 07:12:26,344 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2019-11-20 07:12:26,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:12:26,344 INFO L225 Difference]: With dead ends: 62 [2019-11-20 07:12:26,345 INFO L226 Difference]: Without dead ends: 53 [2019-11-20 07:12:26,345 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2019-11-20 07:12:26,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-20 07:12:26,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2019-11-20 07:12:26,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-20 07:12:26,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2019-11-20 07:12:26,357 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 34 [2019-11-20 07:12:26,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:12:26,357 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2019-11-20 07:12:26,358 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-20 07:12:26,358 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2019-11-20 07:12:26,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-20 07:12:26,359 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:12:26,359 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:12:26,562 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 07:12:26,563 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 07:12:26,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:12:26,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1893861880, now seen corresponding path program 3 times [2019-11-20 07:12:26,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 07:12:26,563 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761811886] [2019-11-20 07:12:26,563 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 07:12:26,569 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-20 07:12:26,569 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [72276048] [2019-11-20 07:12:26,570 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_be180448-1754-4549-ac2c-422d1ff3b4eb/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 07:12:26,650 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-20 07:12:26,650 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 07:12:26,651 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 33 conjunts are in the unsatisfiable core [2019-11-20 07:12:26,653 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:12:26,684 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-11-20 07:12:26,684 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:12:26,690 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:12:26,690 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 07:12:26,691 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2019-11-20 07:12:26,740 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:12:26,740 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 54 [2019-11-20 07:12:26,741 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:12:26,763 INFO L567 ElimStorePlain]: treesize reduction 30, result has 49.2 percent of original size [2019-11-20 07:12:26,763 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 07:12:26,763 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:29 [2019-11-20 07:12:27,127 WARN L191 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2019-11-20 07:12:27,162 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:12:27,162 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 118 [2019-11-20 07:12:27,163 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:12:27,225 INFO L567 ElimStorePlain]: treesize reduction 66, result has 40.5 percent of original size [2019-11-20 07:12:27,226 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 07:12:27,226 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:45 [2019-11-20 07:12:35,419 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 07:12:35,421 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 07:12:35,432 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:12:35,433 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 77 [2019-11-20 07:12:35,433 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:12:35,456 INFO L567 ElimStorePlain]: treesize reduction 24, result has 60.7 percent of original size [2019-11-20 07:12:35,457 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 07:12:35,457 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:62, output treesize:37 [2019-11-20 07:12:35,972 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 07:12:35,975 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 07:12:35,990 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:12:35,991 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 77 [2019-11-20 07:12:35,991 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:12:36,028 INFO L567 ElimStorePlain]: treesize reduction 44, result has 45.7 percent of original size [2019-11-20 07:12:36,028 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 07:12:36,028 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:62, output treesize:32 [2019-11-20 07:12:36,138 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 07:12:36,156 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:12:36,156 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 26 treesize of output 35 [2019-11-20 07:12:36,157 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:12:36,177 INFO L567 ElimStorePlain]: treesize reduction 22, result has 35.3 percent of original size [2019-11-20 07:12:36,177 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 07:12:36,177 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:7 [2019-11-20 07:12:36,205 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-20 07:12:36,205 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761811886] [2019-11-20 07:12:36,205 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-20 07:12:36,205 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72276048] [2019-11-20 07:12:36,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-20 07:12:36,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-11-20 07:12:36,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540913777] [2019-11-20 07:12:36,206 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-20 07:12:36,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 07:12:36,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-20 07:12:36,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=141, Unknown=5, NotChecked=0, Total=182 [2019-11-20 07:12:36,207 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 14 states. [2019-11-20 07:12:43,854 WARN L191 SmtUtils]: Spent 4.02 s on a formula simplification that was a NOOP. DAG size: 32 [2019-11-20 07:12:48,921 WARN L191 SmtUtils]: Spent 2.53 s on a formula simplification that was a NOOP. DAG size: 33 [2019-11-20 07:12:53,375 WARN L191 SmtUtils]: Spent 4.02 s on a formula simplification that was a NOOP. DAG size: 33 [2019-11-20 07:13:03,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:13:03,656 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2019-11-20 07:13:03,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-20 07:13:03,660 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2019-11-20 07:13:03,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:13:03,661 INFO L225 Difference]: With dead ends: 64 [2019-11-20 07:13:03,661 INFO L226 Difference]: Without dead ends: 52 [2019-11-20 07:13:03,662 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 25.8s TimeCoverageRelationStatistics Valid=86, Invalid=284, Unknown=10, NotChecked=0, Total=380 [2019-11-20 07:13:03,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-20 07:13:03,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-11-20 07:13:03,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-20 07:13:03,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2019-11-20 07:13:03,694 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 34 [2019-11-20 07:13:03,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:13:03,694 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2019-11-20 07:13:03,694 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-20 07:13:03,694 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2019-11-20 07:13:03,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-20 07:13:03,700 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:13:03,700 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:13:03,902 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 07:13:03,902 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 07:13:03,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:13:03,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1035254296, now seen corresponding path program 14 times [2019-11-20 07:13:03,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 07:13:03,903 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666424287] [2019-11-20 07:13:03,903 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 07:13:03,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:13:04,026 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 07:13:04,026 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666424287] [2019-11-20 07:13:04,026 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022880556] [2019-11-20 07:13:04,026 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_be180448-1754-4549-ac2c-422d1ff3b4eb/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 07:13:04,068 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 07:13:04,068 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 07:13:04,069 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-20 07:13:04,070 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:13:04,161 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 07:13:04,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 07:13:04,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2019-11-20 07:13:04,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810257858] [2019-11-20 07:13:04,162 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-20 07:13:04,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 07:13:04,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-20 07:13:04,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2019-11-20 07:13:04,163 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand 22 states. [2019-11-20 07:13:04,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:13:04,592 INFO L93 Difference]: Finished difference Result 63 states and 70 transitions. [2019-11-20 07:13:04,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-20 07:13:04,593 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 36 [2019-11-20 07:13:04,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:13:04,594 INFO L225 Difference]: With dead ends: 63 [2019-11-20 07:13:04,594 INFO L226 Difference]: Without dead ends: 59 [2019-11-20 07:13:04,594 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 07:13:04,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-20 07:13:04,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 43. [2019-11-20 07:13:04,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-20 07:13:04,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2019-11-20 07:13:04,603 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 36 [2019-11-20 07:13:04,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:13:04,603 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2019-11-20 07:13:04,603 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-20 07:13:04,604 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2019-11-20 07:13:04,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-20 07:13:04,604 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:13:04,604 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:13:04,808 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 07:13:04,808 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 07:13:04,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:13:04,808 INFO L82 PathProgramCache]: Analyzing trace with hash -127223707, now seen corresponding path program 15 times [2019-11-20 07:13:04,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 07:13:04,809 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253098375] [2019-11-20 07:13:04,809 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 07:13:04,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:13:04,943 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 07:13:04,943 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253098375] [2019-11-20 07:13:04,943 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106342279] [2019-11-20 07:13:04,943 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_be180448-1754-4549-ac2c-422d1ff3b4eb/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 07:13:05,037 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-11-20 07:13:05,037 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 07:13:05,038 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-20 07:13:05,040 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:13:05,178 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 07:13:05,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 07:13:05,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2019-11-20 07:13:05,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954938397] [2019-11-20 07:13:05,179 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-20 07:13:05,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 07:13:05,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-20 07:13:05,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2019-11-20 07:13:05,180 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 22 states. [2019-11-20 07:13:05,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:13:05,481 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2019-11-20 07:13:05,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-20 07:13:05,482 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 37 [2019-11-20 07:13:05,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:13:05,482 INFO L225 Difference]: With dead ends: 67 [2019-11-20 07:13:05,482 INFO L226 Difference]: Without dead ends: 43 [2019-11-20 07:13:05,483 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 07:13:05,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-20 07:13:05,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2019-11-20 07:13:05,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-20 07:13:05,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2019-11-20 07:13:05,492 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 37 [2019-11-20 07:13:05,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:13:05,492 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2019-11-20 07:13:05,492 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-20 07:13:05,493 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2019-11-20 07:13:05,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-20 07:13:05,494 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:13:05,494 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:13:05,697 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 07:13:05,698 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 07:13:05,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:13:05,698 INFO L82 PathProgramCache]: Analyzing trace with hash 639592647, now seen corresponding path program 16 times [2019-11-20 07:13:05,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 07:13:05,698 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878850930] [2019-11-20 07:13:05,698 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 07:13:05,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:13:07,025 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 07:13:07,026 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878850930] [2019-11-20 07:13:07,026 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224901580] [2019-11-20 07:13:07,026 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_be180448-1754-4549-ac2c-422d1ff3b4eb/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 07:13:07,082 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 07:13:07,083 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 07:13:07,084 WARN L253 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 65 conjunts are in the unsatisfiable core [2019-11-20 07:13:07,086 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:13:07,093 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 07:13:07,094 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:13:07,101 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:13:07,112 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 07:13:07,112 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 07:13:07,120 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:13:07,121 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 07:13:07,121 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2019-11-20 07:13:07,169 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 07:13:07,169 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:13:07,179 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:13:07,179 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 07:13:07,179 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:29 [2019-11-20 07:13:07,317 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:13:07,317 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 07:13:07,318 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:13:07,349 INFO L567 ElimStorePlain]: treesize reduction 36, result has 55.6 percent of original size [2019-11-20 07:13:07,350 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 07:13:07,350 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:45 [2019-11-20 07:13:07,526 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:13:07,526 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 07:13:07,527 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:13:07,576 INFO L567 ElimStorePlain]: treesize reduction 72, result has 45.9 percent of original size [2019-11-20 07:13:07,576 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 07:13:07,576 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:65, output treesize:61 [2019-11-20 07:13:07,806 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:13:07,806 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 07:13:07,807 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:13:07,887 INFO L567 ElimStorePlain]: treesize reduction 108, result has 41.6 percent of original size [2019-11-20 07:13:07,888 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 07:13:07,888 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:77 [2019-11-20 07:13:08,177 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:13:08,177 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 07:13:08,178 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:13:08,267 INFO L567 ElimStorePlain]: treesize reduction 144, result has 39.2 percent of original size [2019-11-20 07:13:08,268 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 07:13:08,268 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:97, output treesize:93 [2019-11-20 07:13:08,633 WARN L191 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2019-11-20 07:13:08,633 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:13:08,633 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 07:13:08,634 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:13:08,745 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 60 [2019-11-20 07:13:08,746 INFO L567 ElimStorePlain]: treesize reduction 180, result has 37.7 percent of original size [2019-11-20 07:13:08,746 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 07:13:08,746 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:113, output treesize:109 [2019-11-20 07:13:16,092 WARN L191 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2019-11-20 07:13:16,092 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:13:16,093 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 07:13:16,096 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:13:16,277 WARN L191 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 66 [2019-11-20 07:13:16,278 INFO L567 ElimStorePlain]: treesize reduction 560, result has 19.2 percent of original size [2019-11-20 07:13:16,278 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 07:13:16,278 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:150, output treesize:133 [2019-11-20 07:13:16,856 WARN L191 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2019-11-20 07:13:16,857 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:13:16,857 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 129 treesize of output 573 [2019-11-20 07:13:16,859 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:13:16,994 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 74 [2019-11-20 07:13:16,994 INFO L567 ElimStorePlain]: treesize reduction 320, result has 30.6 percent of original size [2019-11-20 07:13:16,995 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 07:13:16,995 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:174, output treesize:141 [2019-11-20 07:13:17,832 WARN L191 SmtUtils]: Spent 599.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2019-11-20 07:13:18,349 WARN L191 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2019-11-20 07:13:18,350 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:13:18,350 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 132 treesize of output 715 [2019-11-20 07:13:18,353 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:13:18,509 WARN L191 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 81 [2019-11-20 07:13:18,510 INFO L567 ElimStorePlain]: treesize reduction 368, result has 29.9 percent of original size [2019-11-20 07:13:18,511 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 07:13:18,511 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 9 variables, input treesize:182, output treesize:157 [2019-11-20 07:13:19,422 WARN L191 SmtUtils]: Spent 407.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2019-11-20 07:13:19,423 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:13:19,423 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 143 treesize of output 873 [2019-11-20 07:13:19,428 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:13:19,672 WARN L191 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 88 [2019-11-20 07:13:19,673 INFO L567 ElimStorePlain]: treesize reduction 600, result has 22.4 percent of original size [2019-11-20 07:13:19,674 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 07:13:19,674 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 10 variables, input treesize:198, output treesize:173 [2019-11-20 07:13:20,916 WARN L191 SmtUtils]: Spent 574.00 ms on a formula simplification that was a NOOP. DAG size: 267 [2019-11-20 07:13:20,916 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:13:20,917 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 154 treesize of output 1047 [2019-11-20 07:13:20,922 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:13:21,324 WARN L191 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 96 [2019-11-20 07:13:21,324 INFO L567 ElimStorePlain]: treesize reduction 1200, result has 14.2 percent of original size [2019-11-20 07:13:21,325 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 07:13:21,325 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 11 variables, input treesize:214, output treesize:199 [2019-11-20 07:13:35,019 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2019-11-20 07:13:35,820 WARN L191 SmtUtils]: Spent 790.00 ms on a formula simplification that was a NOOP. DAG size: 315 [2019-11-20 07:13:35,820 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:13:35,821 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 175 treesize of output 1239 [2019-11-20 07:13:35,827 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:13:36,280 WARN L191 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 80 [2019-11-20 07:13:36,281 INFO L567 ElimStorePlain]: treesize reduction 1392, result has 9.4 percent of original size [2019-11-20 07:13:36,530 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 07:13:36,530 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 15 variables, input treesize:243, output treesize:116 [2019-11-20 07:13:36,684 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 07:13:36,805 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 07:13:36,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 07:13:36,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 35] total 65 [2019-11-20 07:13:36,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396900387] [2019-11-20 07:13:36,806 INFO L442 AbstractCegarLoop]: Interpolant automaton has 65 states [2019-11-20 07:13:36,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 07:13:36,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2019-11-20 07:13:36,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=3929, Unknown=1, NotChecked=0, Total=4160 [2019-11-20 07:13:36,808 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 65 states. [2019-11-20 07:13:57,674 WARN L191 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2019-11-20 07:14:10,652 WARN L191 SmtUtils]: Spent 733.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 74 [2019-11-20 07:14:13,399 WARN L191 SmtUtils]: Spent 673.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 84 [2019-11-20 07:14:35,294 WARN L191 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 108 DAG size of output: 90 [2019-11-20 07:14:41,175 WARN L191 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 95 [2019-11-20 07:14:51,583 WARN L191 SmtUtils]: Spent 727.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2019-11-20 07:15:03,118 WARN L191 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 97 [2019-11-20 07:15:10,356 WARN L191 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 102 [2019-11-20 07:15:27,382 WARN L191 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 113 [2019-11-20 07:15:38,878 WARN L191 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 112 [2019-11-20 07:15:45,201 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 101 [2019-11-20 07:16:09,767 WARN L191 SmtUtils]: Spent 1.62 s on a formula simplification. DAG size of input: 135 DAG size of output: 71 [2019-11-20 07:16:13,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:16:13,286 INFO L93 Difference]: Finished difference Result 88 states and 100 transitions. [2019-11-20 07:16:13,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-20 07:16:13,288 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 39 [2019-11-20 07:16:13,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:16:13,288 INFO L225 Difference]: With dead ends: 88 [2019-11-20 07:16:13,289 INFO L226 Difference]: Without dead ends: 65 [2019-11-20 07:16:13,291 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 7 SyntacticMatches, 5 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2235 ImplicationChecksByTransitivity, 66.1s TimeCoverageRelationStatistics Valid=572, Invalid=8929, Unknown=5, NotChecked=0, Total=9506 [2019-11-20 07:16:13,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-20 07:16:13,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 60. [2019-11-20 07:16:13,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-11-20 07:16:13,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2019-11-20 07:16:13,303 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 39 [2019-11-20 07:16:13,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:16:13,303 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2019-11-20 07:16:13,303 INFO L463 AbstractCegarLoop]: Interpolant automaton has 65 states. [2019-11-20 07:16:13,303 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2019-11-20 07:16:13,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-20 07:16:13,304 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:16:13,304 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:16:13,504 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 07:16:13,504 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 07:16:13,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:16:13,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1319651017, now seen corresponding path program 4 times [2019-11-20 07:16:13,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 07:16:13,505 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747018309] [2019-11-20 07:16:13,505 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 07:16:13,512 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-20 07:16:13,512 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1531478224] [2019-11-20 07:16:13,512 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_be180448-1754-4549-ac2c-422d1ff3b4eb/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 07:16:13,615 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 07:16:13,616 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 07:16:13,617 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 33 conjunts are in the unsatisfiable core [2019-11-20 07:16:13,618 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:16:13,621 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 07:16:13,621 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:16:13,626 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:16:13,626 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 07:16:13,626 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-11-20 07:16:13,667 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 15 treesize of output 11 [2019-11-20 07:16:13,668 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:16:13,674 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:16:13,674 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 07:16:13,675 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2019-11-20 07:16:13,717 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:16:13,718 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 27 treesize of output 62 [2019-11-20 07:16:13,718 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:16:13,745 INFO L567 ElimStorePlain]: treesize reduction 36, result has 51.4 percent of original size [2019-11-20 07:16:13,746 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 07:16:13,746 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:38 [2019-11-20 07:16:14,063 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:16:14,063 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 48 treesize of output 97 [2019-11-20 07:16:14,063 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:16:14,102 INFO L567 ElimStorePlain]: treesize reduction 96, result has 30.9 percent of original size [2019-11-20 07:16:14,103 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 07:16:14,103 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:68, output treesize:43 [2019-11-20 07:16:14,144 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:16:14,145 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 48 treesize of output 97 [2019-11-20 07:16:14,145 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:16:14,174 INFO L567 ElimStorePlain]: treesize reduction 80, result has 35.0 percent of original size [2019-11-20 07:16:14,175 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 07:16:14,175 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:68, output treesize:43 [2019-11-20 07:16:14,217 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:16:14,218 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 48 treesize of output 97 [2019-11-20 07:16:14,218 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:16:14,248 INFO L567 ElimStorePlain]: treesize reduction 80, result has 35.0 percent of original size [2019-11-20 07:16:14,248 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 07:16:14,248 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:68, output treesize:43 [2019-11-20 07:16:14,332 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:16:14,332 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 48 treesize of output 97 [2019-11-20 07:16:14,333 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:16:14,382 INFO L567 ElimStorePlain]: treesize reduction 48, result has 47.3 percent of original size [2019-11-20 07:16:14,382 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-20 07:16:14,383 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:68, output treesize:39 [2019-11-20 07:16:14,499 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:16:14,499 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 34 treesize of output 58 [2019-11-20 07:16:14,500 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:16:14,530 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:16:14,530 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 07:16:14,532 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 07:16:14,532 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 07:16:14,533 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:50, output treesize:85 [2019-11-20 07:16:14,632 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 07:16:14,713 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 31 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 07:16:14,713 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747018309] [2019-11-20 07:16:14,714 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-20 07:16:14,714 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531478224] [2019-11-20 07:16:14,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-20 07:16:14,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2019-11-20 07:16:14,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068488735] [2019-11-20 07:16:14,715 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-20 07:16:14,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 07:16:14,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-20 07:16:14,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2019-11-20 07:16:14,716 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand 21 states. [2019-11-20 07:16:20,683 WARN L191 SmtUtils]: Spent 705.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2019-11-20 07:16:24,141 WARN L191 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2019-11-20 07:16:25,822 WARN L191 SmtUtils]: Spent 593.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2019-11-20 07:16:26,559 WARN L191 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2019-11-20 07:16:27,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:16:27,443 INFO L93 Difference]: Finished difference Result 85 states and 93 transitions. [2019-11-20 07:16:27,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-20 07:16:27,444 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 39 [2019-11-20 07:16:27,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:16:27,444 INFO L225 Difference]: With dead ends: 85 [2019-11-20 07:16:27,444 INFO L226 Difference]: Without dead ends: 76 [2019-11-20 07:16:27,445 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=473, Invalid=1972, Unknown=5, NotChecked=0, Total=2450 [2019-11-20 07:16:27,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-11-20 07:16:27,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2019-11-20 07:16:27,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-11-20 07:16:27,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2019-11-20 07:16:27,457 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 39 [2019-11-20 07:16:27,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:16:27,458 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2019-11-20 07:16:27,458 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-20 07:16:27,458 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2019-11-20 07:16:27,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-20 07:16:27,458 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:16:27,458 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:16:27,659 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 07:16:27,659 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 07:16:27,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:16:27,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1184266071, now seen corresponding path program 17 times [2019-11-20 07:16:27,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 07:16:27,660 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571206364] [2019-11-20 07:16:27,660 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 07:16:27,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:16:27,829 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 25 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 07:16:27,830 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571206364] [2019-11-20 07:16:27,830 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433730679] [2019-11-20 07:16:27,830 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_be180448-1754-4549-ac2c-422d1ff3b4eb/bin/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 07:16:27,932 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2019-11-20 07:16:27,932 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 07:16:27,933 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-20 07:16:27,934 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:16:28,040 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 36 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 07:16:28,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 07:16:28,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2019-11-20 07:16:28,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362998281] [2019-11-20 07:16:28,051 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-20 07:16:28,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 07:16:28,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-20 07:16:28,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2019-11-20 07:16:28,052 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand 25 states. [2019-11-20 07:16:28,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:16:28,528 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2019-11-20 07:16:28,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-20 07:16:28,529 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 41 [2019-11-20 07:16:28,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:16:28,529 INFO L225 Difference]: With dead ends: 76 [2019-11-20 07:16:28,529 INFO L226 Difference]: Without dead ends: 72 [2019-11-20 07:16:28,530 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=342, Invalid=1140, Unknown=0, NotChecked=0, Total=1482 [2019-11-20 07:16:28,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-20 07:16:28,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2019-11-20 07:16:28,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-11-20 07:16:28,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2019-11-20 07:16:28,542 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 41 [2019-11-20 07:16:28,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:16:28,543 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2019-11-20 07:16:28,543 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-20 07:16:28,543 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2019-11-20 07:16:28,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-20 07:16:28,543 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:16:28,544 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:16:28,747 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 07:16:28,747 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 07:16:28,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:16:28,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1126332488, now seen corresponding path program 18 times [2019-11-20 07:16:28,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 07:16:28,748 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636515105] [2019-11-20 07:16:28,748 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 07:16:28,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:16:28,929 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 54 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 07:16:28,929 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636515105] [2019-11-20 07:16:28,929 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689356770] [2019-11-20 07:16:28,929 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_be180448-1754-4549-ac2c-422d1ff3b4eb/bin/uautomizer/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 07:16:29,013 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2019-11-20 07:16:29,014 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 07:16:29,015 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-20 07:16:29,015 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:16:29,138 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 70 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 07:16:29,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 07:16:29,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2019-11-20 07:16:29,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522911917] [2019-11-20 07:16:29,139 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-20 07:16:29,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 07:16:29,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-20 07:16:29,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2019-11-20 07:16:29,140 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand 25 states. [2019-11-20 07:16:29,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:16:29,365 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2019-11-20 07:16:29,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-20 07:16:29,366 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 42 [2019-11-20 07:16:29,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:16:29,366 INFO L225 Difference]: With dead ends: 77 [2019-11-20 07:16:29,366 INFO L226 Difference]: Without dead ends: 48 [2019-11-20 07:16:29,367 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=247, Invalid=745, Unknown=0, NotChecked=0, Total=992 [2019-11-20 07:16:29,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-20 07:16:29,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2019-11-20 07:16:29,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-20 07:16:29,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2019-11-20 07:16:29,372 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 42 [2019-11-20 07:16:29,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:16:29,372 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2019-11-20 07:16:29,373 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-20 07:16:29,373 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2019-11-20 07:16:29,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-20 07:16:29,373 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:16:29,373 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:16:29,573 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 07:16:29,574 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 07:16:29,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:16:29,574 INFO L82 PathProgramCache]: Analyzing trace with hash -70138730, now seen corresponding path program 19 times [2019-11-20 07:16:29,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 07:16:29,574 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068053609] [2019-11-20 07:16:29,574 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 07:16:29,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:16:31,262 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 07:16:31,262 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068053609] [2019-11-20 07:16:31,262 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412580453] [2019-11-20 07:16:31,262 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_be180448-1754-4549-ac2c-422d1ff3b4eb/bin/uautomizer/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 07:16:31,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:16:31,303 WARN L253 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 73 conjunts are in the unsatisfiable core [2019-11-20 07:16:31,304 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:16:31,308 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 07:16:31,309 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:16:31,316 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:16:31,319 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 07:16:31,319 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 07:16:31,325 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:16:31,326 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 07:16:31,326 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2019-11-20 07:16:31,372 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 07:16:31,372 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:16:31,380 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:16:31,381 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 07:16:31,381 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:29 [2019-11-20 07:16:31,502 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:16:31,502 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 07:16:31,503 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:16:31,527 INFO L567 ElimStorePlain]: treesize reduction 24, result has 60.0 percent of original size [2019-11-20 07:16:31,527 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 07:16:31,527 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:36 [2019-11-20 07:16:31,674 INFO L343 Elim1Store]: treesize reduction 10, result has 87.7 percent of original size [2019-11-20 07:16:31,674 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 07:16:31,675 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:16:31,708 INFO L567 ElimStorePlain]: treesize reduction 54, result has 45.5 percent of original size [2019-11-20 07:16:31,708 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 07:16:31,709 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:45 [2019-11-20 07:16:31,888 INFO L343 Elim1Store]: treesize reduction 77, result has 51.9 percent of original size [2019-11-20 07:16:31,888 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 07:16:31,888 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:16:31,928 INFO L567 ElimStorePlain]: treesize reduction 54, result has 51.4 percent of original size [2019-11-20 07:16:31,928 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 07:16:31,928 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:61, output treesize:57 [2019-11-20 07:16:32,150 INFO L343 Elim1Store]: treesize reduction 66, result has 69.3 percent of original size [2019-11-20 07:16:32,151 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 57 treesize of output 182 [2019-11-20 07:16:32,151 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:16:32,206 INFO L567 ElimStorePlain]: treesize reduction 114, result has 35.6 percent of original size [2019-11-20 07:16:32,206 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 07:16:32,206 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:67, output treesize:63 [2019-11-20 07:16:32,470 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 57 [2019-11-20 07:16:32,471 INFO L343 Elim1Store]: treesize reduction 112, result has 62.7 percent of original size [2019-11-20 07:16:32,471 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 66 treesize of output 224 [2019-11-20 07:16:32,472 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:16:32,540 INFO L567 ElimStorePlain]: treesize reduction 144, result has 33.3 percent of original size [2019-11-20 07:16:32,541 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 07:16:32,541 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:76, output treesize:72 [2019-11-20 07:16:32,890 WARN L191 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 67 [2019-11-20 07:16:32,890 INFO L343 Elim1Store]: treesize reduction 170, result has 57.2 percent of original size [2019-11-20 07:16:32,891 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 21 case distinctions, treesize of input 75 treesize of output 266 [2019-11-20 07:16:32,891 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:16:32,984 INFO L567 ElimStorePlain]: treesize reduction 174, result has 32.6 percent of original size [2019-11-20 07:16:32,984 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 07:16:32,984 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:88, output treesize:84 [2019-11-20 07:16:33,449 INFO L343 Elim1Store]: treesize reduction 240, result has 28.8 percent of original size [2019-11-20 07:16:33,449 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 105 treesize of output 205 [2019-11-20 07:16:33,450 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:16:33,503 INFO L567 ElimStorePlain]: treesize reduction 56, result has 61.6 percent of original size [2019-11-20 07:16:33,503 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 07:16:33,503 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:115, output treesize:90 [2019-11-20 07:16:33,803 INFO L343 Elim1Store]: treesize reduction 240, result has 28.8 percent of original size [2019-11-20 07:16:33,804 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 105 treesize of output 205 [2019-11-20 07:16:33,805 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:16:33,861 INFO L567 ElimStorePlain]: treesize reduction 168, result has 36.4 percent of original size [2019-11-20 07:16:33,862 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 07:16:33,862 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:115, output treesize:96 [2019-11-20 07:16:34,582 WARN L191 SmtUtils]: Spent 638.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2019-11-20 07:16:34,814 INFO L343 Elim1Store]: treesize reduction 240, result has 28.8 percent of original size [2019-11-20 07:16:34,815 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 105 treesize of output 205 [2019-11-20 07:16:34,816 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:16:34,872 INFO L567 ElimStorePlain]: treesize reduction 162, result has 37.2 percent of original size [2019-11-20 07:16:34,872 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 07:16:34,873 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:115, output treesize:96 [2019-11-20 07:16:35,563 WARN L191 SmtUtils]: Spent 606.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2019-11-20 07:16:36,246 WARN L191 SmtUtils]: Spent 587.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2019-11-20 07:16:36,442 WARN L191 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 89 [2019-11-20 07:16:36,443 INFO L343 Elim1Store]: treesize reduction 240, result has 46.5 percent of original size [2019-11-20 07:16:36,443 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 122 treesize of output 333 [2019-11-20 07:16:36,445 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:16:36,516 INFO L567 ElimStorePlain]: treesize reduction 202, result has 35.5 percent of original size [2019-11-20 07:16:36,517 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 07:16:36,517 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:111 [2019-11-20 07:16:36,995 WARN L191 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 89 [2019-11-20 07:16:36,995 INFO L343 Elim1Store]: treesize reduction 240, result has 46.5 percent of original size [2019-11-20 07:16:36,996 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 126 treesize of output 333 [2019-11-20 07:16:36,997 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:16:37,082 INFO L567 ElimStorePlain]: treesize reduction 254, result has 30.4 percent of original size [2019-11-20 07:16:37,083 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 07:16:37,083 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:136, output treesize:111 [2019-11-20 07:16:37,616 WARN L191 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 89 [2019-11-20 07:16:37,616 INFO L343 Elim1Store]: treesize reduction 240, result has 46.5 percent of original size [2019-11-20 07:16:37,616 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 126 treesize of output 333 [2019-11-20 07:16:37,618 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:16:37,697 INFO L567 ElimStorePlain]: treesize reduction 160, result has 38.7 percent of original size [2019-11-20 07:16:37,697 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 07:16:37,697 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:136, output treesize:101 [2019-11-20 07:16:38,096 INFO L343 Elim1Store]: treesize reduction 240, result has 28.8 percent of original size [2019-11-20 07:16:38,097 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 105 treesize of output 205 [2019-11-20 07:16:38,098 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:16:38,163 INFO L567 ElimStorePlain]: treesize reduction 164, result has 37.9 percent of original size [2019-11-20 07:16:38,164 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 07:16:38,164 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:115, output treesize:100 [2019-11-20 07:16:38,302 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 07:16:38,414 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 07:16:38,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 07:16:38,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 33] total 67 [2019-11-20 07:16:38,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821048770] [2019-11-20 07:16:38,415 INFO L442 AbstractCegarLoop]: Interpolant automaton has 67 states [2019-11-20 07:16:38,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 07:16:38,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2019-11-20 07:16:38,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=4214, Unknown=0, NotChecked=0, Total=4422 [2019-11-20 07:16:38,417 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand 67 states. [2019-11-20 07:16:42,327 WARN L191 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2019-11-20 07:16:43,764 WARN L191 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2019-11-20 07:16:45,215 WARN L191 SmtUtils]: Spent 1.37 s on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2019-11-20 07:16:45,757 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2019-11-20 07:16:46,786 WARN L191 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2019-11-20 07:16:47,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:16:47,609 INFO L93 Difference]: Finished difference Result 106 states and 122 transitions. [2019-11-20 07:16:47,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-11-20 07:16:47,609 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 44 [2019-11-20 07:16:47,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:16:47,610 INFO L225 Difference]: With dead ends: 106 [2019-11-20 07:16:47,610 INFO L226 Difference]: Without dead ends: 78 [2019-11-20 07:16:47,613 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 14 SyntacticMatches, 6 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2599 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=479, Invalid=9223, Unknown=0, NotChecked=0, Total=9702 [2019-11-20 07:16:47,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-11-20 07:16:47,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 65. [2019-11-20 07:16:47,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-20 07:16:47,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2019-11-20 07:16:47,624 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 44 [2019-11-20 07:16:47,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:16:47,624 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2019-11-20 07:16:47,624 INFO L463 AbstractCegarLoop]: Interpolant automaton has 67 states. [2019-11-20 07:16:47,624 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2019-11-20 07:16:47,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-20 07:16:47,624 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:16:47,624 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:16:47,825 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 07:16:47,825 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 07:16:47,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:16:47,825 INFO L82 PathProgramCache]: Analyzing trace with hash 609919640, now seen corresponding path program 5 times [2019-11-20 07:16:47,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 07:16:47,826 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342410120] [2019-11-20 07:16:47,826 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 07:16:47,832 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-20 07:16:47,832 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1201465646] [2019-11-20 07:16:47,833 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_be180448-1754-4549-ac2c-422d1ff3b4eb/bin/uautomizer/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 07:16:47,978 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2019-11-20 07:16:47,978 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 07:16:47,980 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 44 conjunts are in the unsatisfiable core [2019-11-20 07:16:47,981 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:16:47,986 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 07:16:47,986 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:16:48,011 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:16:48,012 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 07:16:48,012 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-11-20 07:16:48,064 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 15 treesize of output 11 [2019-11-20 07:16:48,064 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:16:48,072 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:16:48,072 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 07:16:48,072 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2019-11-20 07:16:48,109 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 07:16:48,109 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 07:16:48,110 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:16:48,120 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:16:48,121 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 07:16:48,121 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:31 [2019-11-20 07:16:48,175 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 07:16:48,177 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 07:16:48,178 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 07:16:48,178 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 07:16:48,179 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:16:48,189 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:16:48,190 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 07:16:48,190 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:34 [2019-11-20 07:16:48,218 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 07:16:48,219 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 07:16:48,221 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 07:16:48,221 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 07:16:48,221 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:16:48,231 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:16:48,232 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 07:16:48,232 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:34 [2019-11-20 07:16:48,261 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 07:16:48,262 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 07:16:48,263 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 07:16:48,263 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 07:16:48,264 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:16:48,283 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:16:48,284 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 07:16:48,284 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:34 [2019-11-20 07:16:48,336 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 07:16:48,338 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 07:16:48,339 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 07:16:48,340 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 07:16:48,340 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:16:48,354 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:16:48,355 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 07:16:48,355 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:34 [2019-11-20 07:16:48,392 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 07:16:48,393 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 07:16:48,394 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 07:16:48,399 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 07:16:48,399 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:16:48,410 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:16:48,411 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 07:16:48,411 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:59, output treesize:30 [2019-11-20 07:16:48,466 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 07:16:48,467 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:16:48,467 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 07:16:48,468 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:16:48,471 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:16:48,471 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 07:16:48,471 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:3 [2019-11-20 07:16:48,497 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 28 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-20 07:16:48,497 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342410120] [2019-11-20 07:16:48,497 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-20 07:16:48,497 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201465646] [2019-11-20 07:16:48,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-20 07:16:48,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-11-20 07:16:48,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711237934] [2019-11-20 07:16:48,498 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-20 07:16:48,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 07:16:48,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-20 07:16:48,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2019-11-20 07:16:48,498 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand 19 states. [2019-11-20 07:16:50,877 WARN L191 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2019-11-20 07:16:52,922 WARN L191 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2019-11-20 07:16:53,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:16:53,012 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2019-11-20 07:16:53,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-20 07:16:53,013 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 44 [2019-11-20 07:16:53,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:16:53,013 INFO L225 Difference]: With dead ends: 78 [2019-11-20 07:16:53,013 INFO L226 Difference]: Without dead ends: 69 [2019-11-20 07:16:53,013 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2019-11-20 07:16:53,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-11-20 07:16:53,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2019-11-20 07:16:53,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-20 07:16:53,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 75 transitions. [2019-11-20 07:16:53,025 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 75 transitions. Word has length 44 [2019-11-20 07:16:53,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:16:53,025 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 75 transitions. [2019-11-20 07:16:53,025 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-20 07:16:53,025 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 75 transitions. [2019-11-20 07:16:53,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-20 07:16:53,026 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:16:53,026 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:16:53,226 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 07:16:53,227 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 07:16:53,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:16:53,227 INFO L82 PathProgramCache]: Analyzing trace with hash 188026708, now seen corresponding path program 6 times [2019-11-20 07:16:53,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 07:16:53,228 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775440800] [2019-11-20 07:16:53,228 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 07:16:53,234 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-20 07:16:53,234 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1960106456] [2019-11-20 07:16:53,234 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_be180448-1754-4549-ac2c-422d1ff3b4eb/bin/uautomizer/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 07:16:53,374 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2019-11-20 07:16:53,375 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 07:16:53,377 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 45 conjunts are in the unsatisfiable core [2019-11-20 07:16:53,379 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:16:53,391 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 07:16:53,391 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:16:53,399 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:16:53,400 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 07:16:53,400 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:20 [2019-11-20 07:16:53,447 INFO L343 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2019-11-20 07:16:53,447 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2019-11-20 07:16:53,447 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:16:53,457 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:16:53,457 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 07:16:53,457 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2019-11-20 07:16:53,502 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 07:16:53,503 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 07:16:53,505 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 07:16:53,505 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 42 [2019-11-20 07:16:53,506 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:16:53,529 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:16:53,529 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 07:16:53,529 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:47 [2019-11-20 07:16:53,678 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 07:16:53,680 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 07:16:53,681 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 07:16:53,689 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 07:16:53,711 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:16:53,711 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 115 [2019-11-20 07:16:53,712 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:16:53,761 INFO L567 ElimStorePlain]: treesize reduction 100, result has 35.5 percent of original size [2019-11-20 07:16:53,762 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 07:16:53,762 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:80, output treesize:55 [2019-11-20 07:16:53,806 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 07:16:53,808 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 07:16:53,810 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 07:16:53,813 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 07:16:53,830 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:16:53,831 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 115 [2019-11-20 07:16:53,832 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:16:53,884 INFO L567 ElimStorePlain]: treesize reduction 83, result has 39.9 percent of original size [2019-11-20 07:16:53,884 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 07:16:53,885 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:80, output treesize:55 [2019-11-20 07:16:53,943 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 07:16:53,946 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 07:16:53,947 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 07:16:53,950 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 07:16:53,968 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:16:53,968 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 115 [2019-11-20 07:16:53,969 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:16:54,018 INFO L567 ElimStorePlain]: treesize reduction 83, result has 39.9 percent of original size [2019-11-20 07:16:54,018 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 07:16:54,019 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:80, output treesize:55 [2019-11-20 07:16:54,073 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 07:16:54,076 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 07:16:54,077 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 07:16:54,080 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 07:16:54,102 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:16:54,103 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 115 [2019-11-20 07:16:54,104 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:16:54,152 INFO L567 ElimStorePlain]: treesize reduction 82, result has 40.1 percent of original size [2019-11-20 07:16:54,152 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 07:16:54,152 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:80, output treesize:50 [2019-11-20 07:16:54,228 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 07:16:54,230 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 07:16:54,232 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 07:16:54,253 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:16:54,253 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 53 [2019-11-20 07:16:54,254 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:16:54,284 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:16:54,284 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 07:16:54,285 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 07:16:54,285 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 07:16:54,286 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 07:16:54,287 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 07:16:54,287 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 07:16:54,288 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 07:16:54,290 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 07:16:54,290 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:52, output treesize:169 [2019-11-20 07:16:54,367 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 07:16:54,498 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 31 proven. 72 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-20 07:16:54,498 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775440800] [2019-11-20 07:16:54,498 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-20 07:16:54,498 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960106456] [2019-11-20 07:16:54,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-20 07:16:54,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2019-11-20 07:16:54,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838843269] [2019-11-20 07:16:54,499 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-20 07:16:54,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 07:16:54,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-20 07:16:54,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2019-11-20 07:16:54,499 INFO L87 Difference]: Start difference. First operand 68 states and 75 transitions. Second operand 22 states. [2019-11-20 07:16:55,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:16:55,492 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2019-11-20 07:16:55,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-20 07:16:55,493 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 44 [2019-11-20 07:16:55,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:16:55,493 INFO L225 Difference]: With dead ends: 87 [2019-11-20 07:16:55,493 INFO L226 Difference]: Without dead ends: 83 [2019-11-20 07:16:55,494 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=185, Invalid=1147, Unknown=0, NotChecked=0, Total=1332 [2019-11-20 07:16:55,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-20 07:16:55,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2019-11-20 07:16:55,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-20 07:16:55,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 75 transitions. [2019-11-20 07:16:55,507 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 75 transitions. Word has length 44 [2019-11-20 07:16:55,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:16:55,507 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 75 transitions. [2019-11-20 07:16:55,507 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-20 07:16:55,507 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 75 transitions. [2019-11-20 07:16:55,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-20 07:16:55,508 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:16:55,508 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:16:55,710 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 07:16:55,711 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 07:16:55,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:16:55,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1319780852, now seen corresponding path program 20 times [2019-11-20 07:16:55,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 07:16:55,711 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296528149] [2019-11-20 07:16:55,711 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 07:16:55,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:16:55,899 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 36 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 07:16:55,899 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296528149] [2019-11-20 07:16:55,900 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823105796] [2019-11-20 07:16:55,900 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_be180448-1754-4549-ac2c-422d1ff3b4eb/bin/uautomizer/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 07:16:55,942 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 07:16:55,942 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 07:16:55,943 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-20 07:16:55,944 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:16:56,105 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 49 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 07:16:56,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 07:16:56,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2019-11-20 07:16:56,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712822382] [2019-11-20 07:16:56,106 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-20 07:16:56,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 07:16:56,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-20 07:16:56,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2019-11-20 07:16:56,106 INFO L87 Difference]: Start difference. First operand 68 states and 75 transitions. Second operand 28 states. [2019-11-20 07:16:56,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:16:56,841 INFO L93 Difference]: Finished difference Result 87 states and 97 transitions. [2019-11-20 07:16:56,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-20 07:16:56,841 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 46 [2019-11-20 07:16:56,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:16:56,842 INFO L225 Difference]: With dead ends: 87 [2019-11-20 07:16:56,842 INFO L226 Difference]: Without dead ends: 83 [2019-11-20 07:16:56,842 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=429, Invalid=1463, Unknown=0, NotChecked=0, Total=1892 [2019-11-20 07:16:56,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-20 07:16:56,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 53. [2019-11-20 07:16:56,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-20 07:16:56,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2019-11-20 07:16:56,853 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 46 [2019-11-20 07:16:56,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:16:56,853 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2019-11-20 07:16:56,853 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-20 07:16:56,853 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2019-11-20 07:16:56,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-20 07:16:56,854 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:16:56,854 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:16:57,054 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 07:16:57,055 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 07:16:57,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:16:57,055 INFO L82 PathProgramCache]: Analyzing trace with hash -609786487, now seen corresponding path program 21 times [2019-11-20 07:16:57,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 07:16:57,055 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273434167] [2019-11-20 07:16:57,055 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 07:16:57,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:16:57,232 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 73 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 07:16:57,232 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273434167] [2019-11-20 07:16:57,232 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024927167] [2019-11-20 07:16:57,232 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_be180448-1754-4549-ac2c-422d1ff3b4eb/bin/uautomizer/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 07:16:57,361 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-20 07:16:57,361 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 07:16:57,362 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-20 07:16:57,363 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:16:57,518 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 92 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 07:16:57,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 07:16:57,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2019-11-20 07:16:57,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454389988] [2019-11-20 07:16:57,519 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-20 07:16:57,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 07:16:57,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-20 07:16:57,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2019-11-20 07:16:57,520 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 28 states. [2019-11-20 07:16:57,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:16:57,776 INFO L93 Difference]: Finished difference Result 83 states and 93 transitions. [2019-11-20 07:16:57,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-20 07:16:57,776 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 47 [2019-11-20 07:16:57,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:16:57,776 INFO L225 Difference]: With dead ends: 83 [2019-11-20 07:16:57,777 INFO L226 Difference]: Without dead ends: 53 [2019-11-20 07:16:57,777 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=309, Invalid=951, Unknown=0, NotChecked=0, Total=1260 [2019-11-20 07:16:57,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-20 07:16:57,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2019-11-20 07:16:57,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-20 07:16:57,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2019-11-20 07:16:57,788 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 47 [2019-11-20 07:16:57,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:16:57,789 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2019-11-20 07:16:57,789 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-20 07:16:57,789 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2019-11-20 07:16:57,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-20 07:16:57,789 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:16:57,790 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:16:57,995 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 07:16:57,996 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 07:16:57,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:16:57,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1295219861, now seen corresponding path program 22 times [2019-11-20 07:16:57,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 07:16:57,996 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133579171] [2019-11-20 07:16:57,996 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 07:16:58,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:16:59,659 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 07:16:59,659 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133579171] [2019-11-20 07:16:59,659 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115410265] [2019-11-20 07:16:59,659 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_be180448-1754-4549-ac2c-422d1ff3b4eb/bin/uautomizer/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 07:16:59,727 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 07:16:59,727 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 07:16:59,729 WARN L253 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 81 conjunts are in the unsatisfiable core [2019-11-20 07:16:59,730 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:16:59,735 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 07:16:59,736 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:16:59,743 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:16:59,746 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 07:16:59,746 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 07:16:59,753 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:16:59,753 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 07:16:59,753 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2019-11-20 07:16:59,817 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 07:16:59,818 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:16:59,832 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:16:59,832 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 07:16:59,832 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:29 [2019-11-20 07:16:59,978 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:16:59,978 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 07:16:59,979 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:17:00,010 INFO L567 ElimStorePlain]: treesize reduction 36, result has 55.6 percent of original size [2019-11-20 07:17:00,010 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 07:17:00,011 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:45 [2019-11-20 07:17:00,223 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:17:00,224 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 07:17:00,224 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:17:00,281 INFO L567 ElimStorePlain]: treesize reduction 72, result has 45.9 percent of original size [2019-11-20 07:17:00,282 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 07:17:00,282 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:65, output treesize:61 [2019-11-20 07:17:00,522 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:17:00,522 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 07:17:00,523 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:17:00,588 INFO L567 ElimStorePlain]: treesize reduction 108, result has 41.6 percent of original size [2019-11-20 07:17:00,589 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 07:17:00,589 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:77 [2019-11-20 07:17:00,885 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:17:00,885 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 07:17:00,886 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:17:00,971 INFO L567 ElimStorePlain]: treesize reduction 144, result has 39.2 percent of original size [2019-11-20 07:17:00,972 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 07:17:00,972 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:97, output treesize:93 [2019-11-20 07:17:01,408 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2019-11-20 07:17:01,408 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:17:01,408 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 07:17:01,409 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:17:01,523 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 60 [2019-11-20 07:17:01,524 INFO L567 ElimStorePlain]: treesize reduction 180, result has 37.7 percent of original size [2019-11-20 07:17:01,524 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 07:17:01,524 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:113, output treesize:109 [2019-11-20 07:17:02,498 WARN L191 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2019-11-20 07:17:02,500 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:17:02,500 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 21 case distinctions, treesize of input 89 treesize of output 562 [2019-11-20 07:17:02,501 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:17:02,639 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 67 [2019-11-20 07:17:02,640 INFO L567 ElimStorePlain]: treesize reduction 216, result has 36.7 percent of original size [2019-11-20 07:17:02,640 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 07:17:02,640 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:129, output treesize:125 [2019-11-20 07:17:12,713 WARN L191 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2019-11-20 07:17:12,713 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:17:12,713 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 28 case distinctions, treesize of input 100 treesize of output 708 [2019-11-20 07:17:12,715 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:17:12,903 WARN L191 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 74 [2019-11-20 07:17:12,903 INFO L567 ElimStorePlain]: treesize reduction 252, result has 35.9 percent of original size [2019-11-20 07:17:12,904 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 07:17:12,904 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:145, output treesize:141 [2019-11-20 07:18:38,901 WARN L194 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2019-11-20 07:18:38,902 FATAL L310 FreeRefinementEngine]: Exception during interpolant generation: SMTLIBException [2019-11-20 07:18:39,102 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 07:18:39,103 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.getOrConstructPredicate(PredicateUnifier.java:305) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:576) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:440) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:201) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:291) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:177) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:297) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:180) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:463) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:333) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:123) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) 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) ... 42 more [2019-11-20 07:18:39,107 INFO L168 Benchmark]: Toolchain (without parser) took 468866.94 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 231.2 MB). Free memory was 944.7 MB in the beginning and 986.6 MB in the end (delta: -41.9 MB). Peak memory consumption was 189.3 MB. Max. memory is 11.5 GB. [2019-11-20 07:18:39,107 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 07:18:39,107 INFO L168 Benchmark]: CACSL2BoogieTranslator took 448.21 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 145.2 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -191.5 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. [2019-11-20 07:18:39,107 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.97 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 07:18:39,107 INFO L168 Benchmark]: Boogie Preprocessor took 24.16 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 07:18:39,108 INFO L168 Benchmark]: RCFGBuilder took 293.80 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 23.6 MB). Peak memory consumption was 23.6 MB. Max. memory is 11.5 GB. [2019-11-20 07:18:39,108 INFO L168 Benchmark]: TraceAbstraction took 468049.98 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 86.0 MB). Free memory was 1.1 GB in the beginning and 986.6 MB in the end (delta: 126.0 MB). Peak memory consumption was 211.9 MB. Max. memory is 11.5 GB. [2019-11-20 07:18:39,109 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 448.21 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 145.2 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -191.5 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 42.97 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 24.16 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 293.80 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 23.6 MB). Peak memory consumption was 23.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 468049.98 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 86.0 MB). Free memory was 1.1 GB in the beginning and 986.6 MB in the end (delta: 126.0 MB). Peak memory consumption was 211.9 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 07:18:41,031 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 07:18:41,034 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 07:18:41,047 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 07:18:41,049 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 07:18:41,051 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 07:18:41,054 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 07:18:41,064 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 07:18:41,067 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 07:18:41,068 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 07:18:41,069 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 07:18:41,070 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 07:18:41,071 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 07:18:41,072 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 07:18:41,073 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 07:18:41,074 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 07:18:41,075 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 07:18:41,076 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 07:18:41,078 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 07:18:41,081 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 07:18:41,083 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 07:18:41,084 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 07:18:41,086 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 07:18:41,087 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 07:18:41,091 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 07:18:41,091 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 07:18:41,092 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 07:18:41,093 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 07:18:41,094 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 07:18:41,095 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 07:18:41,095 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 07:18:41,096 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 07:18:41,097 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 07:18:41,098 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 07:18:41,100 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 07:18:41,100 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 07:18:41,101 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 07:18:41,101 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 07:18:41,102 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 07:18:41,103 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 07:18:41,104 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 07:18:41,105 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_be180448-1754-4549-ac2c-422d1ff3b4eb/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2019-11-20 07:18:41,122 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 07:18:41,122 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 07:18:41,124 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 07:18:41,124 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 07:18:41,125 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 07:18:41,125 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 07:18:41,125 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 07:18:41,126 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 07:18:41,126 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 07:18:41,126 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-20 07:18:41,127 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 07:18:41,127 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-20 07:18:41,127 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-20 07:18:41,128 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-20 07:18:41,128 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 07:18:41,128 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 07:18:41,129 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 07:18:41,129 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-20 07:18:41,129 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 07:18:41,130 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 07:18:41,130 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 07:18:41,130 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 07:18:41,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 07:18:41,131 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 07:18:41,132 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 07:18:41,132 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-20 07:18:41,132 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-20 07:18:41,133 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-20 07:18:41,133 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-20 07:18:41,133 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-20 07:18:41,133 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_be180448-1754-4549-ac2c-422d1ff3b4eb/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 -> 04a56f9ad65a098e527ed274929f036070b1f0d1 [2019-11-20 07:18:41,436 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 07:18:41,452 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 07:18:41,458 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 07:18:41,460 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 07:18:41,461 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 07:18:41,463 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_be180448-1754-4549-ac2c-422d1ff3b4eb/bin/uautomizer/../../sv-benchmarks/c/array-fpi/s5if.c [2019-11-20 07:18:41,535 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_be180448-1754-4549-ac2c-422d1ff3b4eb/bin/uautomizer/data/07306f986/044261b7a44c4ba2ac85a3edb4fd1549/FLAGad89f645e [2019-11-20 07:18:41,958 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 07:18:41,959 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_be180448-1754-4549-ac2c-422d1ff3b4eb/sv-benchmarks/c/array-fpi/s5if.c [2019-11-20 07:18:41,966 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_be180448-1754-4549-ac2c-422d1ff3b4eb/bin/uautomizer/data/07306f986/044261b7a44c4ba2ac85a3edb4fd1549/FLAGad89f645e [2019-11-20 07:18:42,345 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_be180448-1754-4549-ac2c-422d1ff3b4eb/bin/uautomizer/data/07306f986/044261b7a44c4ba2ac85a3edb4fd1549 [2019-11-20 07:18:42,349 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 07:18:42,351 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 07:18:42,353 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 07:18:42,354 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 07:18:42,359 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 07:18:42,360 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:18:42" (1/1) ... [2019-11-20 07:18:42,363 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e1407a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:18:42, skipping insertion in model container [2019-11-20 07:18:42,363 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:18:42" (1/1) ... [2019-11-20 07:18:42,372 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 07:18:42,395 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 07:18:42,567 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 07:18:42,578 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 07:18:42,601 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 07:18:42,622 INFO L192 MainTranslator]: Completed translation [2019-11-20 07:18:42,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:18:42 WrapperNode [2019-11-20 07:18:42,623 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 07:18:42,623 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 07:18:42,624 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 07:18:42,624 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 07:18:42,632 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:18:42" (1/1) ... [2019-11-20 07:18:42,643 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:18:42" (1/1) ... [2019-11-20 07:18:42,740 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 07:18:42,741 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 07:18:42,742 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 07:18:42,742 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 07:18:42,751 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:18:42" (1/1) ... [2019-11-20 07:18:42,752 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:18:42" (1/1) ... [2019-11-20 07:18:42,759 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:18:42" (1/1) ... [2019-11-20 07:18:42,760 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:18:42" (1/1) ... [2019-11-20 07:18:42,780 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:18:42" (1/1) ... [2019-11-20 07:18:42,785 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:18:42" (1/1) ... [2019-11-20 07:18:42,787 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:18:42" (1/1) ... [2019-11-20 07:18:42,791 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 07:18:42,796 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 07:18:42,796 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 07:18:42,796 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 07:18:42,798 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:18:42" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_be180448-1754-4549-ac2c-422d1ff3b4eb/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 07:18:42,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-20 07:18:42,890 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2019-11-20 07:18:42,891 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-20 07:18:42,892 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-20 07:18:42,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 07:18:42,892 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 07:18:42,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2019-11-20 07:18:42,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-20 07:18:42,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-20 07:18:43,256 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 07:18:43,257 INFO L285 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-20 07:18:43,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:18:43 BoogieIcfgContainer [2019-11-20 07:18:43,258 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 07:18:43,259 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 07:18:43,259 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 07:18:43,263 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 07:18:43,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:18:42" (1/3) ... [2019-11-20 07:18:43,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a0d660a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:18:43, skipping insertion in model container [2019-11-20 07:18:43,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:18:42" (2/3) ... [2019-11-20 07:18:43,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a0d660a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:18:43, skipping insertion in model container [2019-11-20 07:18:43,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:18:43" (3/3) ... [2019-11-20 07:18:43,267 INFO L109 eAbstractionObserver]: Analyzing ICFG s5if.c [2019-11-20 07:18:43,278 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 07:18:43,285 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-20 07:18:43,298 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-20 07:18:43,323 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 07:18:43,324 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-20 07:18:43,324 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 07:18:43,324 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 07:18:43,324 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 07:18:43,324 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 07:18:43,325 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 07:18:43,325 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 07:18:43,338 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-11-20 07:18:43,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-20 07:18:43,344 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:18:43,345 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:18:43,345 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 07:18:43,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:18:43,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1476218026, now seen corresponding path program 1 times [2019-11-20 07:18:43,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 07:18:43,369 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1956257610] [2019-11-20 07:18:43,369 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_be180448-1754-4549-ac2c-422d1ff3b4eb/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 07:18:43,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:18:43,479 INFO L255 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-20 07:18:43,483 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:18:43,494 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 07:18:43,494 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 07:18:43,498 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 07:18:43,499 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1956257610] [2019-11-20 07:18:43,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 07:18:43,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-20 07:18:43,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694059154] [2019-11-20 07:18:43,505 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-20 07:18:43,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 07:18:43,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-20 07:18:43,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-20 07:18:43,519 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2019-11-20 07:18:43,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:18:43,536 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2019-11-20 07:18:43,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-20 07:18:43,538 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2019-11-20 07:18:43,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:18:43,548 INFO L225 Difference]: With dead ends: 29 [2019-11-20 07:18:43,548 INFO L226 Difference]: Without dead ends: 13 [2019-11-20 07:18:43,551 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 07:18:43,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-11-20 07:18:43,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-11-20 07:18:43,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-20 07:18:43,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2019-11-20 07:18:43,586 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 9 [2019-11-20 07:18:43,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:18:43,586 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2019-11-20 07:18:43,587 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-20 07:18:43,587 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2019-11-20 07:18:43,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-20 07:18:43,587 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:18:43,588 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:18:43,790 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 07:18:43,791 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 07:18:43,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:18:43,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1304115419, now seen corresponding path program 1 times [2019-11-20 07:18:43,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 07:18:43,792 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1409602661] [2019-11-20 07:18:43,792 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_be180448-1754-4549-ac2c-422d1ff3b4eb/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 07:18:43,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:18:43,882 INFO L255 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-20 07:18:43,883 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:18:43,909 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 07:18:43,909 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 07:18:43,928 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 07:18:43,929 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1409602661] [2019-11-20 07:18:43,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 07:18:43,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-20 07:18:43,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436545185] [2019-11-20 07:18:43,931 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 07:18:43,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 07:18:43,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 07:18:43,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-20 07:18:43,932 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 4 states. [2019-11-20 07:18:44,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:18:44,065 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2019-11-20 07:18:44,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-20 07:18:44,066 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2019-11-20 07:18:44,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:18:44,067 INFO L225 Difference]: With dead ends: 23 [2019-11-20 07:18:44,067 INFO L226 Difference]: Without dead ends: 15 [2019-11-20 07:18:44,068 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 07:18:44,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-20 07:18:44,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2019-11-20 07:18:44,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-20 07:18:44,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2019-11-20 07:18:44,073 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9 [2019-11-20 07:18:44,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:18:44,073 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2019-11-20 07:18:44,073 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 07:18:44,073 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2019-11-20 07:18:44,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-20 07:18:44,074 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:18:44,074 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:18:44,277 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 07:18:44,277 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 07:18:44,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:18:44,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1358761923, now seen corresponding path program 1 times [2019-11-20 07:18:44,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 07:18:44,279 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1417331548] [2019-11-20 07:18:44,279 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_be180448-1754-4549-ac2c-422d1ff3b4eb/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 07:18:44,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:18:44,402 INFO L255 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 07:18:44,403 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:18:44,482 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 07:18:44,482 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 07:18:44,621 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 07:18:44,622 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1417331548] [2019-11-20 07:18:44,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 07:18:44,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-11-20 07:18:44,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864456266] [2019-11-20 07:18:44,623 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 07:18:44,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 07:18:44,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 07:18:44,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-11-20 07:18:44,624 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 10 states. [2019-11-20 07:18:45,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:18:45,388 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2019-11-20 07:18:45,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-20 07:18:45,389 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 11 [2019-11-20 07:18:45,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:18:45,390 INFO L225 Difference]: With dead ends: 39 [2019-11-20 07:18:45,391 INFO L226 Difference]: Without dead ends: 32 [2019-11-20 07:18:45,391 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 07:18:45,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-20 07:18:45,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 22. [2019-11-20 07:18:45,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-20 07:18:45,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-11-20 07:18:45,399 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 11 [2019-11-20 07:18:45,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:18:45,400 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-11-20 07:18:45,400 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 07:18:45,400 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-11-20 07:18:45,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-20 07:18:45,401 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:18:45,401 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:18:45,613 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 07:18:45,613 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 07:18:45,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:18:45,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1565637502, now seen corresponding path program 1 times [2019-11-20 07:18:45,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 07:18:45,614 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [193282246] [2019-11-20 07:18:45,615 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_be180448-1754-4549-ac2c-422d1ff3b4eb/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 07:18:45,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:18:45,759 INFO L255 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 07:18:45,761 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:18:45,815 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 07:18:45,816 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:18:45,835 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:18:45,843 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 07:18:45,844 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 07:18:45,847 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 07:18:45,848 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 07:18:45,860 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:18:45,861 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 07:18:45,861 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:28 [2019-11-20 07:18:45,909 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 07:18:45,911 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 07:18:45,912 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:18:45,946 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:18:45,947 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 07:18:45,948 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:39 [2019-11-20 07:18:46,080 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 07:18:46,080 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 07:18:46,216 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 07:18:46,217 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [193282246] [2019-11-20 07:18:46,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 07:18:46,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 3] imperfect sequences [] total 6 [2019-11-20 07:18:46,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440813764] [2019-11-20 07:18:46,218 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 07:18:46,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 07:18:46,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 07:18:46,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-20 07:18:46,219 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 6 states. [2019-11-20 07:18:46,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:18:46,602 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-11-20 07:18:46,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 07:18:46,620 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2019-11-20 07:18:46,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:18:46,621 INFO L225 Difference]: With dead ends: 31 [2019-11-20 07:18:46,621 INFO L226 Difference]: Without dead ends: 22 [2019-11-20 07:18:46,622 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 07:18:46,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-20 07:18:46,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-11-20 07:18:46,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-20 07:18:46,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2019-11-20 07:18:46,640 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 14 [2019-11-20 07:18:46,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:18:46,642 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2019-11-20 07:18:46,642 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 07:18:46,643 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2019-11-20 07:18:46,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-20 07:18:46,644 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:18:46,644 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:18:46,844 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 07:18:46,845 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 07:18:46,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:18:46,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1508379200, now seen corresponding path program 1 times [2019-11-20 07:18:46,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 07:18:46,846 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1475466791] [2019-11-20 07:18:46,846 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_be180448-1754-4549-ac2c-422d1ff3b4eb/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 07:18:46,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:18:46,928 INFO L255 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 07:18:46,930 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:18:46,951 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 07:18:46,952 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:18:46,957 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:18:46,958 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 07:18:46,958 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-11-20 07:18:46,999 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 07:18:47,000 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:18:47,013 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:18:47,013 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 07:18:47,013 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:5 [2019-11-20 07:18:47,023 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 07:18:47,023 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 07:18:47,064 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 07:18:47,092 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 07:18:47,093 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 07:18:47,098 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:18:47,099 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 07:18:47,102 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:18:47,103 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 07:18:47,103 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:16, output treesize:7 [2019-11-20 07:18:47,124 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 07:18:47,124 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1475466791] [2019-11-20 07:18:47,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 07:18:47,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2019-11-20 07:18:47,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635131761] [2019-11-20 07:18:47,125 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-20 07:18:47,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 07:18:47,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-20 07:18:47,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-20 07:18:47,126 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 9 states. [2019-11-20 07:18:47,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:18:47,247 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2019-11-20 07:18:47,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 07:18:47,247 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2019-11-20 07:18:47,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:18:47,248 INFO L225 Difference]: With dead ends: 23 [2019-11-20 07:18:47,248 INFO L226 Difference]: Without dead ends: 0 [2019-11-20 07:18:47,252 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2019-11-20 07:18:47,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-20 07:18:47,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-20 07:18:47,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-20 07:18:47,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-20 07:18:47,253 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2019-11-20 07:18:47,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:18:47,253 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 07:18:47,253 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-20 07:18:47,254 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-20 07:18:47,254 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-20 07:18:47,454 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 07:18:47,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-20 07:18:47,864 WARN L191 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2019-11-20 07:18:47,867 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-20 07:18:47,868 INFO L444 ceAbstractionStarter]: For program point L27-2(lines 27 30) no Hoare annotation was computed. [2019-11-20 07:18:47,868 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 (= (_ 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|))) (and .cse0 (bvslt (_ bv0 32) ~N~0) .cse1 .cse2 (= (_ bv5 32) (select (select |#memory_int| ULTIMATE.start_main_~a~0.base) ULTIMATE.start_main_~a~0.offset)) .cse3)))) [2019-11-20 07:18:47,868 INFO L444 ceAbstractionStarter]: For program point L27-4(lines 27 30) no Hoare annotation was computed. [2019-11-20 07:18:47,868 INFO L444 ceAbstractionStarter]: For program point L19(line 19) no Hoare annotation was computed. [2019-11-20 07:18:47,869 INFO L447 ceAbstractionStarter]: At program point L42(lines 16 43) the Hoare annotation is: true [2019-11-20 07:18:47,869 INFO L444 ceAbstractionStarter]: For program point L34(lines 34 38) no Hoare annotation was computed. [2019-11-20 07:18:47,869 INFO L444 ceAbstractionStarter]: For program point L-1(line -1) no Hoare annotation was computed. [2019-11-20 07:18:47,869 INFO L444 ceAbstractionStarter]: For program point L32-2(lines 32 39) no Hoare annotation was computed. [2019-11-20 07:18:47,869 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-20 07:18:47,869 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)) (= (_ bv5 32) (select (select |#memory_int| ULTIMATE.start_main_~a~0.base) ULTIMATE.start_main_~a~0.offset)) (= (select .cse0 |ULTIMATE.start_main_~#sum~0.offset|) ((_ extract 31 0) .cse1)))) [2019-11-20 07:18:47,870 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-20 07:18:47,870 INFO L444 ceAbstractionStarter]: For program point L32-4(lines 32 39) no Hoare annotation was computed. [2019-11-20 07:18:47,871 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 10) no Hoare annotation was computed. [2019-11-20 07:18:47,871 INFO L444 ceAbstractionStarter]: For program point L10(line 10) no Hoare annotation was computed. [2019-11-20 07:18:47,871 INFO L444 ceAbstractionStarter]: For program point L10-1(line 10) no Hoare annotation was computed. [2019-11-20 07:18:47,872 INFO L444 ceAbstractionStarter]: For program point L10-3(line 10) no Hoare annotation was computed. [2019-11-20 07:18:47,882 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 07:18:47,883 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 07:18:47,883 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 07:18:47,890 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 07:18:47,890 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 07:18:47,890 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 07:18:47,901 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 07:18:47,901 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 07:18:47,901 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 07:18:47,902 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 07:18:47,902 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 07:18:47,911 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 07:18:47,912 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 07:18:47,912 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 07:18:47,913 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 07:18:47,914 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 07:18:47,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 07:18:47 BoogieIcfgContainer [2019-11-20 07:18:47,919 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-20 07:18:47,920 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 07:18:47,920 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 07:18:47,920 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 07:18:47,921 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:18:43" (3/4) ... [2019-11-20 07:18:47,925 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-20 07:18:47,936 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2019-11-20 07:18:47,936 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2019-11-20 07:18:47,937 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2019-11-20 07:18:47,984 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_be180448-1754-4549-ac2c-422d1ff3b4eb/bin/uautomizer/witness.graphml [2019-11-20 07:18:47,985 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 07:18:47,986 INFO L168 Benchmark]: Toolchain (without parser) took 5635.27 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 143.1 MB). Free memory was 955.1 MB in the beginning and 918.9 MB in the end (delta: 36.2 MB). Peak memory consumption was 179.3 MB. Max. memory is 11.5 GB. [2019-11-20 07:18:47,986 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 1.0 GB. Free memory is still 981.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 07:18:47,987 INFO L168 Benchmark]: CACSL2BoogieTranslator took 269.46 ms. Allocated memory is still 1.0 GB. Free memory was 955.1 MB in the beginning and 944.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-20 07:18:47,995 INFO L168 Benchmark]: Boogie Procedure Inliner took 117.76 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 143.1 MB). Free memory was 944.3 MB in the beginning and 1.1 GB in the end (delta: -188.7 MB). Peak memory consumption was 15.4 MB. Max. memory is 11.5 GB. [2019-11-20 07:18:47,995 INFO L168 Benchmark]: Boogie Preprocessor took 49.63 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 07:18:47,996 INFO L168 Benchmark]: RCFGBuilder took 462.31 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 11.5 GB. [2019-11-20 07:18:47,996 INFO L168 Benchmark]: TraceAbstraction took 4660.69 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 918.9 MB in the end (delta: 194.9 MB). Peak memory consumption was 194.9 MB. Max. memory is 11.5 GB. [2019-11-20 07:18:47,996 INFO L168 Benchmark]: Witness Printer took 64.67 ms. Allocated memory is still 1.2 GB. Free memory is still 918.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 07:18:47,999 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 1.0 GB. Free memory is still 981.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 269.46 ms. Allocated memory is still 1.0 GB. Free memory was 955.1 MB in the beginning and 944.3 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 117.76 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 143.1 MB). Free memory was 944.3 MB in the beginning and 1.1 GB in the end (delta: -188.7 MB). Peak memory consumption was 15.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 49.63 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 462.31 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4660.69 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 918.9 MB in the end (delta: 194.9 MB). Peak memory consumption was 194.9 MB. Max. memory is 11.5 GB. * Witness Printer took 64.67 ms. Allocated memory is still 1.2 GB. Free memory is still 918.9 MB. There was no memory consumed. 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 07:18:48,006 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 07:18:48,006 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 07:18:48,006 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 07:18:48,012 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 07:18:48,012 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 07:18:48,012 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]) && 5bv32 == unknown-#memory_int-unknown[a][a]) && unknown-#memory_int-unknown[sum][sum] == ~sign_extendFrom32To64(0bv32)[31:0] - InvariantResult [Line: 27]: Loop Invariant [2019-11-20 07:18:48,014 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 07:18:48,014 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 07:18:48,014 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 07:18:48,014 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 07:18:48,015 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 07:18:48,016 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 07:18:48,016 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 07:18:48,016 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 07:18:48,016 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 07:18:48,016 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]) && !(a == sum)) || (((((0bv32 == a && ~bvslt32(0bv32, N)) && sum == 0bv32) && unknown-#memory_int-unknown[sum][~bvadd16(sum, 4bv32)] == ~sign_extendFrom32To64(0bv32)[63:32]) && 5bv32 == unknown-#memory_int-unknown[a][a]) && unknown-#memory_int-unknown[sum][sum] == ~sign_extendFrom32To64(0bv32)[31:0]) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 1 error locations. Result: SAFE, OverallTime: 4.5s, OverallIterations: 5, TraceHistogramMax: 1, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, HoareTripleCheckerStatistics: 50 SDtfs, 74 SDslu, 29 SDs, 0 SdLazy, 164 SolverSat, 37 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 110 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 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, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 57 NumberOfCodeBlocks, 57 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 104 ConstructedInterpolants, 5 QuantifiedInterpolants, 7188 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...