./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 f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_5d162747-1751-4ece-a827-3daa4c2b903e/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_5d162747-1751-4ece-a827-3daa4c2b903e/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_5d162747-1751-4ece-a827-3daa4c2b903e/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_5d162747-1751-4ece-a827-3daa4c2b903e/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/s5if.c -s /tmp/vcloud-vcloud-master/worker/run_dir_5d162747-1751-4ece-a827-3daa4c2b903e/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_5d162747-1751-4ece-a827-3daa4c2b903e/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_5d162747-1751-4ece-a827-3daa4c2b903e/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_5d162747-1751-4ece-a827-3daa4c2b903e/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_5d162747-1751-4ece-a827-3daa4c2b903e/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_5d162747-1751-4ece-a827-3daa4c2b903e/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/s5if.c -s /tmp/vcloud-vcloud-master/worker/run_dir_5d162747-1751-4ece-a827-3daa4c2b903e/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_5d162747-1751-4ece-a827-3daa4c2b903e/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: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 17:22:02,538 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 17:22:02,540 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 17:22:02,547 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 17:22:02,547 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 17:22:02,548 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 17:22:02,549 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 17:22:02,550 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 17:22:02,551 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 17:22:02,552 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 17:22:02,553 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 17:22:02,553 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 17:22:02,554 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 17:22:02,554 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 17:22:02,555 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 17:22:02,556 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 17:22:02,556 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 17:22:02,557 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 17:22:02,558 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 17:22:02,560 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 17:22:02,561 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 17:22:02,562 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 17:22:02,562 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 17:22:02,563 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 17:22:02,565 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 17:22:02,565 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 17:22:02,565 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 17:22:02,565 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 17:22:02,566 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 17:22:02,566 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 17:22:02,566 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 17:22:02,567 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 17:22:02,567 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 17:22:02,567 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 17:22:02,568 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 17:22:02,568 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 17:22:02,569 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 17:22:02,569 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 17:22:02,569 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 17:22:02,569 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 17:22:02,570 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 17:22:02,570 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_5d162747-1751-4ece-a827-3daa4c2b903e/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-07 17:22:02,580 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 17:22:02,580 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 17:22:02,581 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 17:22:02,581 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 17:22:02,581 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 17:22:02,581 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 17:22:02,581 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 17:22:02,582 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 17:22:02,582 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 17:22:02,582 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 17:22:02,582 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 17:22:02,582 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 17:22:02,582 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 17:22:02,582 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 17:22:02,582 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 17:22:02,582 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 17:22:02,583 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 17:22:02,583 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 17:22:02,583 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 17:22:02,583 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 17:22:02,583 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 17:22:02,583 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 17:22:02,583 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 17:22:02,584 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 17:22:02,584 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 17:22:02,584 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 17:22:02,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 17:22:02,584 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 17:22:02,584 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 17:22:02,584 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_5d162747-1751-4ece-a827-3daa4c2b903e/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 [2019-12-07 17:22:02,683 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 17:22:02,690 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 17:22:02,693 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 17:22:02,694 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 17:22:02,694 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 17:22:02,694 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_5d162747-1751-4ece-a827-3daa4c2b903e/bin/uautomizer/../../sv-benchmarks/c/array-fpi/s5if.c [2019-12-07 17:22:02,732 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5d162747-1751-4ece-a827-3daa4c2b903e/bin/uautomizer/data/28b7138a0/64f84505856646098dd8677db47adf8c/FLAG5264bbf5c [2019-12-07 17:22:03,055 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 17:22:03,056 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_5d162747-1751-4ece-a827-3daa4c2b903e/sv-benchmarks/c/array-fpi/s5if.c [2019-12-07 17:22:03,059 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5d162747-1751-4ece-a827-3daa4c2b903e/bin/uautomizer/data/28b7138a0/64f84505856646098dd8677db47adf8c/FLAG5264bbf5c [2019-12-07 17:22:03,068 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_5d162747-1751-4ece-a827-3daa4c2b903e/bin/uautomizer/data/28b7138a0/64f84505856646098dd8677db47adf8c [2019-12-07 17:22:03,070 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 17:22:03,071 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 17:22:03,071 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 17:22:03,071 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 17:22:03,074 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 17:22:03,074 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 05:22:03" (1/1) ... [2019-12-07 17:22:03,076 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17b32c79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:22:03, skipping insertion in model container [2019-12-07 17:22:03,076 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 05:22:03" (1/1) ... [2019-12-07 17:22:03,081 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 17:22:03,091 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 17:22:03,198 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 17:22:03,236 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 17:22:03,249 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 17:22:03,259 INFO L208 MainTranslator]: Completed translation [2019-12-07 17:22:03,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:22:03 WrapperNode [2019-12-07 17:22:03,260 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 17:22:03,260 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 17:22:03,260 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 17:22:03,260 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 17:22:03,266 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:22:03" (1/1) ... [2019-12-07 17:22:03,271 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:22:03" (1/1) ... [2019-12-07 17:22:03,284 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 17:22:03,284 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 17:22:03,284 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 17:22:03,284 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 17:22:03,290 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:22:03" (1/1) ... [2019-12-07 17:22:03,290 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:22:03" (1/1) ... [2019-12-07 17:22:03,292 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:22:03" (1/1) ... [2019-12-07 17:22:03,292 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:22:03" (1/1) ... [2019-12-07 17:22:03,295 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:22:03" (1/1) ... [2019-12-07 17:22:03,298 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:22:03" (1/1) ... [2019-12-07 17:22:03,299 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:22:03" (1/1) ... [2019-12-07 17:22:03,301 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 17:22:03,301 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 17:22:03,301 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 17:22:03,301 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 17:22:03,302 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:22:03" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5d162747-1751-4ece-a827-3daa4c2b903e/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 [2019-12-07 17:22:03,340 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-07 17:22:03,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 17:22:03,340 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-12-07 17:22:03,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 17:22:03,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 17:22:03,340 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-07 17:22:03,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 17:22:03,468 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 17:22:03,468 INFO L287 CfgBuilder]: Removed 8 assume(true) statements. [2019-12-07 17:22:03,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 05:22:03 BoogieIcfgContainer [2019-12-07 17:22:03,469 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 17:22:03,470 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 17:22:03,470 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 17:22:03,472 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 17:22:03,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 05:22:03" (1/3) ... [2019-12-07 17:22:03,472 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32c0518a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 05:22:03, skipping insertion in model container [2019-12-07 17:22:03,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:22:03" (2/3) ... [2019-12-07 17:22:03,473 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32c0518a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 05:22:03, skipping insertion in model container [2019-12-07 17:22:03,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 05:22:03" (3/3) ... [2019-12-07 17:22:03,474 INFO L109 eAbstractionObserver]: Analyzing ICFG s5if.c [2019-12-07 17:22:03,480 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 17:22:03,484 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 17:22:03,491 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 17:22:03,505 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 17:22:03,505 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 17:22:03,505 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 17:22:03,505 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 17:22:03,505 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 17:22:03,505 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 17:22:03,506 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 17:22:03,506 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 17:22:03,514 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-12-07 17:22:03,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-07 17:22:03,518 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:22:03,519 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:22:03,519 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:22:03,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:22:03,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1476218026, now seen corresponding path program 1 times [2019-12-07 17:22:03,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:22:03,529 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659589715] [2019-12-07 17:22:03,529 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:22:03,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:22:03,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:22:03,616 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659589715] [2019-12-07 17:22:03,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 17:22:03,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 17:22:03,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230358944] [2019-12-07 17:22:03,620 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-12-07 17:22:03,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:22:03,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-12-07 17:22:03,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 17:22:03,630 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2019-12-07 17:22:03,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:22:03,641 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2019-12-07 17:22:03,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-12-07 17:22:03,642 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2019-12-07 17:22:03,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:22:03,647 INFO L225 Difference]: With dead ends: 29 [2019-12-07 17:22:03,647 INFO L226 Difference]: Without dead ends: 13 [2019-12-07 17:22:03,649 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 [2019-12-07 17:22:03,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-12-07 17:22:03,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-12-07 17:22:03,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-12-07 17:22:03,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2019-12-07 17:22:03,670 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 9 [2019-12-07 17:22:03,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:22:03,670 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2019-12-07 17:22:03,670 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-12-07 17:22:03,670 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2019-12-07 17:22:03,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-07 17:22:03,671 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:22:03,671 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:22:03,671 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:22:03,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:22:03,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1304115419, now seen corresponding path program 1 times [2019-12-07 17:22:03,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:22:03,671 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571283545] [2019-12-07 17:22:03,672 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:22:03,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:22:03,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:22:03,713 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571283545] [2019-12-07 17:22:03,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 17:22:03,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 17:22:03,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465311504] [2019-12-07 17:22:03,714 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 17:22:03,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:22:03,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 17:22:03,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 17:22:03,715 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 3 states. [2019-12-07 17:22:03,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:22:03,739 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2019-12-07 17:22:03,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 17:22:03,739 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-12-07 17:22:03,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:22:03,740 INFO L225 Difference]: With dead ends: 23 [2019-12-07 17:22:03,740 INFO L226 Difference]: Without dead ends: 15 [2019-12-07 17:22:03,740 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 [2019-12-07 17:22:03,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-12-07 17:22:03,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2019-12-07 17:22:03,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-12-07 17:22:03,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2019-12-07 17:22:03,743 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9 [2019-12-07 17:22:03,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:22:03,743 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2019-12-07 17:22:03,743 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 17:22:03,743 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2019-12-07 17:22:03,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-07 17:22:03,743 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:22:03,744 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:22:03,744 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:22:03,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:22:03,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1358761923, now seen corresponding path program 1 times [2019-12-07 17:22:03,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:22:03,744 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764561070] [2019-12-07 17:22:03,744 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:22:03,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:22:03,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 17:22:03,779 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764561070] [2019-12-07 17:22:03,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 17:22:03,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 17:22:03,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242067709] [2019-12-07 17:22:03,779 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 17:22:03,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:22:03,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 17:22:03,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 17:22:03,780 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 4 states. [2019-12-07 17:22:03,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:22:03,807 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2019-12-07 17:22:03,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 17:22:03,807 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-12-07 17:22:03,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:22:03,808 INFO L225 Difference]: With dead ends: 22 [2019-12-07 17:22:03,808 INFO L226 Difference]: Without dead ends: 18 [2019-12-07 17:22:03,808 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 [2019-12-07 17:22:03,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-12-07 17:22:03,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 15. [2019-12-07 17:22:03,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-12-07 17:22:03,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2019-12-07 17:22:03,810 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2019-12-07 17:22:03,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:22:03,811 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2019-12-07 17:22:03,811 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 17:22:03,811 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2019-12-07 17:22:03,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-07 17:22:03,811 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:22:03,811 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:22:03,811 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:22:03,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:22:03,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1565637502, now seen corresponding path program 1 times [2019-12-07 17:22:03,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:22:03,812 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781317117] [2019-12-07 17:22:03,812 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:22:03,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:22:03,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:22:03,959 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781317117] [2019-12-07 17:22:03,959 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11543804] [2019-12-07 17:22:03,960 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5d162747-1751-4ece-a827-3daa4c2b903e/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 [2019-12-07 17:22:03,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:22:03,995 INFO L264 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 24 conjunts are in the unsatisfiable core [2019-12-07 17:22:04,000 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:22:04,040 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 [2019-12-07 17:22:04,040 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:22:04,052 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:22:04,058 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 [2019-12-07 17:22:04,059 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 17:22:04,067 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:22:04,068 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:22:04,068 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:30, output treesize:22 [2019-12-07 17:22:04,091 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 [2019-12-07 17:22:04,092 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:22:04,102 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:22:04,102 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:22:04,103 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2019-12-07 17:22:04,242 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:22:04,243 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 [2019-12-07 17:22:04,244 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:22:04,266 INFO L614 ElimStorePlain]: treesize reduction 24, result has 68.8 percent of original size [2019-12-07 17:22:04,267 INFO L534 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. [2019-12-07 17:22:04,267 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:70, output treesize:53 [2019-12-07 17:22:04,296 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 17:22:04,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:22:04,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:22:04,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2019-12-07 17:22:04,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757132642] [2019-12-07 17:22:04,315 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-07 17:22:04,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:22:04,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-07 17:22:04,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2019-12-07 17:22:04,316 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 15 states. [2019-12-07 17:22:04,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:22:04,598 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2019-12-07 17:22:04,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 17:22:04,599 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 14 [2019-12-07 17:22:04,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:22:04,601 INFO L225 Difference]: With dead ends: 33 [2019-12-07 17:22:04,601 INFO L226 Difference]: Without dead ends: 24 [2019-12-07 17:22:04,602 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2019-12-07 17:22:04,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-12-07 17:22:04,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2019-12-07 17:22:04,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-12-07 17:22:04,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2019-12-07 17:22:04,606 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 14 [2019-12-07 17:22:04,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:22:04,606 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2019-12-07 17:22:04,606 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-07 17:22:04,606 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2019-12-07 17:22:04,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-07 17:22:04,606 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:22:04,607 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:22:04,807 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:22:04,808 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:22:04,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:22:04,809 INFO L82 PathProgramCache]: Analyzing trace with hash -472130976, now seen corresponding path program 2 times [2019-12-07 17:22:04,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:22:04,810 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838002466] [2019-12-07 17:22:04,810 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:22:04,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:22:04,886 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:22:04,886 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838002466] [2019-12-07 17:22:04,886 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840663998] [2019-12-07 17:22:04,886 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5d162747-1751-4ece-a827-3daa4c2b903e/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 [2019-12-07 17:22:04,914 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 17:22:04,915 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 17:22:04,915 INFO L264 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 17:22:04,916 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:22:04,940 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:22:04,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:22:04,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2019-12-07 17:22:04,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859759199] [2019-12-07 17:22:04,941 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 17:22:04,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:22:04,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 17:22:04,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-12-07 17:22:04,942 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 10 states. [2019-12-07 17:22:05,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:22:05,038 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-12-07 17:22:05,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 17:22:05,038 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2019-12-07 17:22:05,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:22:05,039 INFO L225 Difference]: With dead ends: 31 [2019-12-07 17:22:05,039 INFO L226 Difference]: Without dead ends: 27 [2019-12-07 17:22:05,040 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2019-12-07 17:22:05,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-12-07 17:22:05,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2019-12-07 17:22:05,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-12-07 17:22:05,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2019-12-07 17:22:05,044 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 16 [2019-12-07 17:22:05,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:22:05,044 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2019-12-07 17:22:05,044 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 17:22:05,044 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2019-12-07 17:22:05,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-07 17:22:05,045 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:22:05,045 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:22:05,245 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:22:05,246 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:22:05,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:22:05,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1317941731, now seen corresponding path program 3 times [2019-12-07 17:22:05,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:22:05,248 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238005558] [2019-12-07 17:22:05,248 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:22:05,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:22:05,315 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:22:05,315 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238005558] [2019-12-07 17:22:05,316 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110406500] [2019-12-07 17:22:05,316 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5d162747-1751-4ece-a827-3daa4c2b903e/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 [2019-12-07 17:22:05,343 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-07 17:22:05,344 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 17:22:05,344 INFO L264 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 17:22:05,345 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:22:05,366 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:22:05,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:22:05,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2019-12-07 17:22:05,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150648218] [2019-12-07 17:22:05,367 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 17:22:05,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:22:05,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 17:22:05,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-12-07 17:22:05,367 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 10 states. [2019-12-07 17:22:05,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:22:05,452 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2019-12-07 17:22:05,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 17:22:05,453 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2019-12-07 17:22:05,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:22:05,453 INFO L225 Difference]: With dead ends: 35 [2019-12-07 17:22:05,453 INFO L226 Difference]: Without dead ends: 23 [2019-12-07 17:22:05,454 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-12-07 17:22:05,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-12-07 17:22:05,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2019-12-07 17:22:05,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-12-07 17:22:05,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2019-12-07 17:22:05,456 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 17 [2019-12-07 17:22:05,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:22:05,457 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2019-12-07 17:22:05,457 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 17:22:05,457 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2019-12-07 17:22:05,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-07 17:22:05,457 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:22:05,457 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:22:05,658 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:22:05,659 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:22:05,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:22:05,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1991965825, now seen corresponding path program 4 times [2019-12-07 17:22:05,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:22:05,660 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366835027] [2019-12-07 17:22:05,660 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:22:05,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:22:05,997 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:22:05,997 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366835027] [2019-12-07 17:22:05,998 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182531022] [2019-12-07 17:22:05,998 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5d162747-1751-4ece-a827-3daa4c2b903e/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 [2019-12-07 17:22:06,023 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 17:22:06,023 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 17:22:06,024 INFO L264 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2019-12-07 17:22:06,025 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:22:06,031 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 [2019-12-07 17:22:06,031 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:22:06,036 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:22:06,038 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 [2019-12-07 17:22:06,038 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 17:22:06,043 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:22:06,043 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:22:06,043 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2019-12-07 17:22:06,062 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 [2019-12-07 17:22:06,062 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:22:06,069 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:22:06,069 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:22:06,069 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:29 [2019-12-07 17:22:06,141 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:22:06,141 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 [2019-12-07 17:22:06,142 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:22:06,165 INFO L614 ElimStorePlain]: treesize reduction 36, result has 55.6 percent of original size [2019-12-07 17:22:06,165 INFO L534 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. [2019-12-07 17:22:06,166 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:45 [2019-12-07 17:22:06,468 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:22:06,468 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 [2019-12-07 17:22:06,469 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:22:06,503 INFO L614 ElimStorePlain]: treesize reduction 80, result has 46.3 percent of original size [2019-12-07 17:22:06,504 INFO L534 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. [2019-12-07 17:22:06,504 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:86, output treesize:69 [2019-12-07 17:22:06,703 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:22:06,703 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 [2019-12-07 17:22:06,706 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:22:06,762 INFO L614 ElimStorePlain]: treesize reduction 190, result has 28.6 percent of original size [2019-12-07 17:22:06,763 INFO L534 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. [2019-12-07 17:22:06,763 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:113, output treesize:66 [2019-12-07 17:22:06,813 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 17:22:06,844 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:22:06,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:22:06,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2019-12-07 17:22:06,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835593319] [2019-12-07 17:22:06,845 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-12-07 17:22:06,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:22:06,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-12-07 17:22:06,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2019-12-07 17:22:06,846 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 29 states. [2019-12-07 17:22:07,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:22:07,980 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2019-12-07 17:22:07,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-07 17:22:07,981 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 19 [2019-12-07 17:22:07,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:22:07,981 INFO L225 Difference]: With dead ends: 43 [2019-12-07 17:22:07,981 INFO L226 Difference]: Without dead ends: 32 [2019-12-07 17:22:07,982 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=206, Invalid=1434, Unknown=0, NotChecked=0, Total=1640 [2019-12-07 17:22:07,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-12-07 17:22:07,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2019-12-07 17:22:07,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-07 17:22:07,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-12-07 17:22:07,986 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 19 [2019-12-07 17:22:07,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:22:07,986 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-12-07 17:22:07,986 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-12-07 17:22:07,986 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-12-07 17:22:07,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-12-07 17:22:07,987 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:22:07,987 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:22:08,187 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:22:08,188 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:22:08,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:22:08,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1189058463, now seen corresponding path program 5 times [2019-12-07 17:22:08,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:22:08,190 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760707383] [2019-12-07 17:22:08,190 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:22:08,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:22:08,235 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:22:08,235 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760707383] [2019-12-07 17:22:08,236 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697192787] [2019-12-07 17:22:08,236 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5d162747-1751-4ece-a827-3daa4c2b903e/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 [2019-12-07 17:22:08,265 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-07 17:22:08,265 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 17:22:08,266 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 17:22:08,266 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:22:08,297 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:22:08,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:22:08,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2019-12-07 17:22:08,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797766087] [2019-12-07 17:22:08,298 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-07 17:22:08,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:22:08,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-07 17:22:08,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2019-12-07 17:22:08,298 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 13 states. [2019-12-07 17:22:08,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:22:08,423 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2019-12-07 17:22:08,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-07 17:22:08,423 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2019-12-07 17:22:08,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:22:08,424 INFO L225 Difference]: With dead ends: 39 [2019-12-07 17:22:08,424 INFO L226 Difference]: Without dead ends: 35 [2019-12-07 17:22:08,424 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2019-12-07 17:22:08,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-12-07 17:22:08,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2019-12-07 17:22:08,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-12-07 17:22:08,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2019-12-07 17:22:08,428 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 21 [2019-12-07 17:22:08,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:22:08,428 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2019-12-07 17:22:08,428 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-07 17:22:08,428 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2019-12-07 17:22:08,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-12-07 17:22:08,429 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:22:08,429 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:22:08,629 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:22:08,630 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:22:08,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:22:08,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1846717952, now seen corresponding path program 6 times [2019-12-07 17:22:08,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:22:08,631 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175229693] [2019-12-07 17:22:08,631 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:22:08,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:22:08,710 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:22:08,710 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175229693] [2019-12-07 17:22:08,710 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896545648] [2019-12-07 17:22:08,710 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5d162747-1751-4ece-a827-3daa4c2b903e/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 [2019-12-07 17:22:08,737 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-07 17:22:08,737 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 17:22:08,737 INFO L264 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 17:22:08,738 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:22:08,768 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:22:08,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:22:08,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2019-12-07 17:22:08,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469301491] [2019-12-07 17:22:08,769 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-07 17:22:08,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:22:08,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-07 17:22:08,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2019-12-07 17:22:08,769 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 13 states. [2019-12-07 17:22:08,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:22:08,840 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2019-12-07 17:22:08,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-07 17:22:08,840 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 22 [2019-12-07 17:22:08,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:22:08,841 INFO L225 Difference]: With dead ends: 43 [2019-12-07 17:22:08,841 INFO L226 Difference]: Without dead ends: 28 [2019-12-07 17:22:08,841 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-07 17:22:08,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-12-07 17:22:08,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2019-12-07 17:22:08,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-12-07 17:22:08,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2019-12-07 17:22:08,844 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2019-12-07 17:22:08,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:22:08,844 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2019-12-07 17:22:08,844 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-07 17:22:08,844 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2019-12-07 17:22:08,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-12-07 17:22:08,845 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:22:08,845 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:22:09,045 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:22:09,047 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:22:09,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:22:09,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1106368034, now seen corresponding path program 7 times [2019-12-07 17:22:09,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:22:09,048 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533623159] [2019-12-07 17:22:09,049 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:22:09,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:22:09,501 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2019-12-07 17:22:09,907 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:22:09,908 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533623159] [2019-12-07 17:22:09,909 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41285704] [2019-12-07 17:22:09,909 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5d162747-1751-4ece-a827-3daa4c2b903e/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 [2019-12-07 17:22:09,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:22:09,946 INFO L264 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 41 conjunts are in the unsatisfiable core [2019-12-07 17:22:09,948 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:22:09,953 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 [2019-12-07 17:22:09,953 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:22:09,959 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:22:09,961 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 [2019-12-07 17:22:09,962 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 17:22:09,967 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:22:09,967 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:22:09,967 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2019-12-07 17:22:09,995 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 [2019-12-07 17:22:09,995 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:22:10,001 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:22:10,002 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:22:10,002 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:29 [2019-12-07 17:22:10,065 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:22:10,066 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 [2019-12-07 17:22:10,066 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:22:10,085 INFO L614 ElimStorePlain]: treesize reduction 24, result has 60.0 percent of original size [2019-12-07 17:22:10,085 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:22:10,086 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:36 [2019-12-07 17:22:10,376 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2019-12-07 17:22:10,377 INFO L343 Elim1Store]: treesize reduction 10, result has 87.7 percent of original size [2019-12-07 17:22:10,377 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 [2019-12-07 17:22:10,379 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:22:10,474 INFO L614 ElimStorePlain]: treesize reduction 54, result has 47.1 percent of original size [2019-12-07 17:22:10,475 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:22:10,475 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:52, output treesize:48 [2019-12-07 17:22:11,163 INFO L343 Elim1Store]: treesize reduction 32, result has 56.2 percent of original size [2019-12-07 17:22:11,163 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 [2019-12-07 17:22:11,164 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:22:11,185 INFO L614 ElimStorePlain]: treesize reduction 20, result has 73.0 percent of original size [2019-12-07 17:22:11,185 INFO L534 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. [2019-12-07 17:22:11,185 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:79, output treesize:54 [2019-12-07 17:22:13,002 WARN L192 SmtUtils]: Spent 1.78 s on a formula simplification that was a NOOP. DAG size: 34 [2019-12-07 17:22:13,714 WARN L192 SmtUtils]: Spent 678.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2019-12-07 17:22:13,765 INFO L343 Elim1Store]: treesize reduction 32, result has 75.2 percent of original size [2019-12-07 17:22:13,765 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 [2019-12-07 17:22:13,766 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:22:13,797 INFO L614 ElimStorePlain]: treesize reduction 108, result has 37.6 percent of original size [2019-12-07 17:22:13,797 INFO L534 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. [2019-12-07 17:22:13,797 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:90, output treesize:65 [2019-12-07 17:22:16,316 WARN L192 SmtUtils]: Spent 2.48 s on a formula simplification that was a NOOP. DAG size: 41 [2019-12-07 17:22:18,237 WARN L192 SmtUtils]: Spent 1.86 s on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2019-12-07 17:22:18,288 INFO L343 Elim1Store]: treesize reduction 32, result has 75.2 percent of original size [2019-12-07 17:22:18,288 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 [2019-12-07 17:22:18,289 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:22:18,324 INFO L614 ElimStorePlain]: treesize reduction 114, result has 36.3 percent of original size [2019-12-07 17:22:18,325 INFO L534 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. [2019-12-07 17:22:18,325 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:90, output treesize:65 [2019-12-07 17:22:18,383 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 17:22:18,421 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:22:18,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:22:18,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 35 [2019-12-07 17:22:18,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718061616] [2019-12-07 17:22:18,421 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-12-07 17:22:18,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:22:18,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-12-07 17:22:18,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1082, Unknown=0, NotChecked=0, Total=1190 [2019-12-07 17:22:18,422 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 35 states. [2019-12-07 17:22:22,337 WARN L192 SmtUtils]: Spent 2.96 s on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2019-12-07 17:22:25,639 WARN L192 SmtUtils]: Spent 3.21 s on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2019-12-07 17:22:27,459 WARN L192 SmtUtils]: Spent 1.78 s on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2019-12-07 17:22:27,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:22:27,600 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2019-12-07 17:22:27,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-07 17:22:27,600 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 24 [2019-12-07 17:22:27,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:22:27,600 INFO L225 Difference]: With dead ends: 60 [2019-12-07 17:22:27,601 INFO L226 Difference]: Without dead ends: 44 [2019-12-07 17:22:27,601 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=248, Invalid=2302, Unknown=0, NotChecked=0, Total=2550 [2019-12-07 17:22:27,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-12-07 17:22:27,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 33. [2019-12-07 17:22:27,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-12-07 17:22:27,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2019-12-07 17:22:27,606 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 24 [2019-12-07 17:22:27,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:22:27,606 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2019-12-07 17:22:27,606 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-12-07 17:22:27,606 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2019-12-07 17:22:27,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-12-07 17:22:27,606 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:22:27,606 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:22:27,807 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:22:27,808 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:22:27,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:22:27,809 INFO L82 PathProgramCache]: Analyzing trace with hash -426309664, now seen corresponding path program 1 times [2019-12-07 17:22:27,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:22:27,809 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977757110] [2019-12-07 17:22:27,809 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:22:27,817 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 17:22:27,817 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1825689516] [2019-12-07 17:22:27,818 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5d162747-1751-4ece-a827-3daa4c2b903e/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 [2019-12-07 17:22:27,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:22:27,847 INFO L264 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2019-12-07 17:22:27,848 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:22:27,851 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 [2019-12-07 17:22:27,852 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:22:27,854 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:22:27,854 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:22:27,854 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2019-12-07 17:22:27,864 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 [2019-12-07 17:22:27,864 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:22:27,869 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:22:27,869 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:22:27,869 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2019-12-07 17:22:27,893 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:22:27,894 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 [2019-12-07 17:22:27,894 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:22:27,907 INFO L614 ElimStorePlain]: treesize reduction 30, result has 48.3 percent of original size [2019-12-07 17:22:27,907 INFO L534 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. [2019-12-07 17:22:27,907 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:28 [2019-12-07 17:22:27,947 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:22:27,948 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 [2019-12-07 17:22:27,948 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:22:27,963 INFO L614 ElimStorePlain]: treesize reduction 72, result has 30.1 percent of original size [2019-12-07 17:22:27,963 INFO L534 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. [2019-12-07 17:22:27,963 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:56, output treesize:27 [2019-12-07 17:22:27,993 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:22:27,994 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 [2019-12-07 17:22:27,994 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:22:27,996 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:22:27,996 INFO L534 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:22:27,997 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:33, output treesize:3 [2019-12-07 17:22:28,006 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 17:22:28,006 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977757110] [2019-12-07 17:22:28,006 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 17:22:28,006 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825689516] [2019-12-07 17:22:28,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 17:22:28,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-12-07 17:22:28,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949172097] [2019-12-07 17:22:28,007 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-07 17:22:28,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:22:28,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-07 17:22:28,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2019-12-07 17:22:28,007 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 11 states. [2019-12-07 17:22:28,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:22:28,168 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2019-12-07 17:22:28,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 17:22:28,169 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2019-12-07 17:22:28,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:22:28,169 INFO L225 Difference]: With dead ends: 46 [2019-12-07 17:22:28,169 INFO L226 Difference]: Without dead ends: 37 [2019-12-07 17:22:28,169 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2019-12-07 17:22:28,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-12-07 17:22:28,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2019-12-07 17:22:28,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-07 17:22:28,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2019-12-07 17:22:28,174 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 24 [2019-12-07 17:22:28,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:22:28,174 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2019-12-07 17:22:28,174 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-07 17:22:28,174 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2019-12-07 17:22:28,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-12-07 17:22:28,175 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:22:28,175 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:22:28,375 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:22:28,376 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:22:28,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:22:28,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1700299324, now seen corresponding path program 8 times [2019-12-07 17:22:28,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:22:28,377 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349240490] [2019-12-07 17:22:28,377 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:22:28,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:22:28,450 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:22:28,450 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349240490] [2019-12-07 17:22:28,450 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517967792] [2019-12-07 17:22:28,450 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5d162747-1751-4ece-a827-3daa4c2b903e/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 [2019-12-07 17:22:28,476 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 17:22:28,476 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 17:22:28,477 INFO L264 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-07 17:22:28,478 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:22:28,520 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:22:28,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:22:28,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2019-12-07 17:22:28,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212699118] [2019-12-07 17:22:28,520 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-07 17:22:28,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:22:28,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-07 17:22:28,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-07 17:22:28,521 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 16 states. [2019-12-07 17:22:28,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:22:28,685 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2019-12-07 17:22:28,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-07 17:22:28,685 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 26 [2019-12-07 17:22:28,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:22:28,686 INFO L225 Difference]: With dead ends: 47 [2019-12-07 17:22:28,686 INFO L226 Difference]: Without dead ends: 43 [2019-12-07 17:22:28,687 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 [2019-12-07 17:22:28,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-12-07 17:22:28,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2019-12-07 17:22:28,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-12-07 17:22:28,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2019-12-07 17:22:28,691 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 26 [2019-12-07 17:22:28,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:22:28,692 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2019-12-07 17:22:28,692 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-07 17:22:28,692 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2019-12-07 17:22:28,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-12-07 17:22:28,692 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:22:28,693 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:22:28,893 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:22:28,893 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:22:28,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:22:28,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1307941697, now seen corresponding path program 9 times [2019-12-07 17:22:28,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:22:28,894 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764238300] [2019-12-07 17:22:28,894 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:22:28,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:22:28,948 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:22:28,948 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764238300] [2019-12-07 17:22:28,948 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31970919] [2019-12-07 17:22:28,948 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5d162747-1751-4ece-a827-3daa4c2b903e/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 [2019-12-07 17:22:28,977 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-07 17:22:28,977 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 17:22:28,978 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-07 17:22:28,979 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:22:29,019 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:22:29,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:22:29,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2019-12-07 17:22:29,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891804300] [2019-12-07 17:22:29,020 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-07 17:22:29,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:22:29,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-07 17:22:29,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-12-07 17:22:29,021 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 16 states. [2019-12-07 17:22:29,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:22:29,124 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2019-12-07 17:22:29,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-07 17:22:29,125 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 27 [2019-12-07 17:22:29,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:22:29,125 INFO L225 Difference]: With dead ends: 51 [2019-12-07 17:22:29,125 INFO L226 Difference]: Without dead ends: 33 [2019-12-07 17:22:29,126 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2019-12-07 17:22:29,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-12-07 17:22:29,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2019-12-07 17:22:29,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-07 17:22:29,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2019-12-07 17:22:29,130 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 27 [2019-12-07 17:22:29,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:22:29,130 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2019-12-07 17:22:29,130 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-07 17:22:29,130 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2019-12-07 17:22:29,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-12-07 17:22:29,130 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:22:29,131 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:22:29,331 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:22:29,331 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:22:29,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:22:29,331 INFO L82 PathProgramCache]: Analyzing trace with hash 311885347, now seen corresponding path program 10 times [2019-12-07 17:22:29,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:22:29,332 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428560886] [2019-12-07 17:22:29,332 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:22:29,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:22:29,854 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:22:29,854 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428560886] [2019-12-07 17:22:29,854 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083113607] [2019-12-07 17:22:29,854 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5d162747-1751-4ece-a827-3daa4c2b903e/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 [2019-12-07 17:22:29,883 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 17:22:29,883 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 17:22:29,884 WARN L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 49 conjunts are in the unsatisfiable core [2019-12-07 17:22:29,886 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:22:29,890 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 [2019-12-07 17:22:29,890 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:22:29,896 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:22:29,898 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 [2019-12-07 17:22:29,898 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 17:22:29,902 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:22:29,903 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:22:29,903 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2019-12-07 17:22:29,930 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 [2019-12-07 17:22:29,930 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:22:29,935 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:22:29,936 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:22:29,936 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:29 [2019-12-07 17:22:30,020 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:22:30,020 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 [2019-12-07 17:22:30,021 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:22:30,041 INFO L614 ElimStorePlain]: treesize reduction 36, result has 55.6 percent of original size [2019-12-07 17:22:30,042 INFO L534 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. [2019-12-07 17:22:30,042 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:45 [2019-12-07 17:22:30,158 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:22:30,158 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 [2019-12-07 17:22:30,159 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:22:30,192 INFO L614 ElimStorePlain]: treesize reduction 72, result has 45.9 percent of original size [2019-12-07 17:22:30,193 INFO L534 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. [2019-12-07 17:22:30,193 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:65, output treesize:61 [2019-12-07 17:22:30,348 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:22:30,348 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 [2019-12-07 17:22:30,349 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:22:30,397 INFO L614 ElimStorePlain]: treesize reduction 108, result has 41.6 percent of original size [2019-12-07 17:22:30,397 INFO L534 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. [2019-12-07 17:22:30,397 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:77 [2019-12-07 17:22:30,841 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:22:30,842 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 [2019-12-07 17:22:30,842 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:22:30,863 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:22:30,864 INFO L534 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. [2019-12-07 17:22:30,864 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:118, output treesize:93 [2019-12-07 17:22:31,134 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:22:31,134 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 [2019-12-07 17:22:31,135 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:22:31,206 INFO L614 ElimStorePlain]: treesize reduction 224, result has 34.7 percent of original size [2019-12-07 17:22:31,207 INFO L534 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. [2019-12-07 17:22:31,207 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:134, output treesize:119 [2019-12-07 17:22:31,632 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:22:31,633 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 120 treesize of output 449 [2019-12-07 17:22:31,635 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:22:31,736 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 69 [2019-12-07 17:22:31,736 INFO L614 ElimStorePlain]: treesize reduction 468, result has 21.9 percent of original size [2019-12-07 17:22:31,737 INFO L534 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. [2019-12-07 17:22:31,737 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:160, output treesize:131 [2019-12-07 17:22:32,237 WARN L192 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2019-12-07 17:22:32,238 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:22:32,238 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 [2019-12-07 17:22:32,241 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:22:32,361 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 66 [2019-12-07 17:22:32,361 INFO L614 ElimStorePlain]: treesize reduction 713, result has 14.3 percent of original size [2019-12-07 17:22:32,413 INFO L534 ElimStorePlain]: Start of recursive call 1: 10 dim-0 vars, 1 dim-2 vars, End of recursive call: 8 dim-0 vars, and 1 xjuncts. [2019-12-07 17:22:32,413 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 11 variables, input treesize:168, output treesize:109 [2019-12-07 17:22:32,592 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 17:22:32,658 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:22:32,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:22:32,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 47 [2019-12-07 17:22:32,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632276537] [2019-12-07 17:22:32,658 INFO L442 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-12-07 17:22:32,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:22:32,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-12-07 17:22:32,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=2011, Unknown=0, NotChecked=0, Total=2162 [2019-12-07 17:22:32,659 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 47 states. [2019-12-07 17:22:35,322 WARN L192 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 70 [2019-12-07 17:22:36,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:22:36,249 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2019-12-07 17:22:36,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-07 17:22:36,250 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 29 [2019-12-07 17:22:36,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:22:36,250 INFO L225 Difference]: With dead ends: 65 [2019-12-07 17:22:36,250 INFO L226 Difference]: Without dead ends: 48 [2019-12-07 17:22:36,252 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=374, Invalid=4318, Unknown=0, NotChecked=0, Total=4692 [2019-12-07 17:22:36,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-12-07 17:22:36,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2019-12-07 17:22:36,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-12-07 17:22:36,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2019-12-07 17:22:36,259 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 29 [2019-12-07 17:22:36,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:22:36,259 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2019-12-07 17:22:36,260 INFO L463 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-12-07 17:22:36,260 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2019-12-07 17:22:36,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-12-07 17:22:36,260 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:22:36,260 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:22:36,461 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:22:36,462 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:22:36,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:22:36,463 INFO L82 PathProgramCache]: Analyzing trace with hash 879440005, now seen corresponding path program 11 times [2019-12-07 17:22:36,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:22:36,463 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001687131] [2019-12-07 17:22:36,463 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:22:36,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:22:36,561 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 9 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:22:36,562 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001687131] [2019-12-07 17:22:36,562 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709066603] [2019-12-07 17:22:36,562 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5d162747-1751-4ece-a827-3daa4c2b903e/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 [2019-12-07 17:22:36,619 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-12-07 17:22:36,619 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 17:22:36,620 INFO L264 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-07 17:22:36,621 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:22:36,670 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:22:36,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:22:36,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2019-12-07 17:22:36,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920139581] [2019-12-07 17:22:36,671 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-07 17:22:36,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:22:36,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-07 17:22:36,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2019-12-07 17:22:36,671 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 19 states. [2019-12-07 17:22:36,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:22:36,903 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2019-12-07 17:22:36,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-07 17:22:36,903 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 31 [2019-12-07 17:22:36,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:22:36,904 INFO L225 Difference]: With dead ends: 55 [2019-12-07 17:22:36,904 INFO L226 Difference]: Without dead ends: 51 [2019-12-07 17:22:36,904 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=614, Unknown=0, NotChecked=0, Total=812 [2019-12-07 17:22:36,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-12-07 17:22:36,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2019-12-07 17:22:36,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-12-07 17:22:36,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2019-12-07 17:22:36,909 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 31 [2019-12-07 17:22:36,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:22:36,910 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2019-12-07 17:22:36,910 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-07 17:22:36,910 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2019-12-07 17:22:36,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-12-07 17:22:36,910 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:22:36,910 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:22:37,111 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:22:37,112 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:22:37,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:22:37,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1393842980, now seen corresponding path program 12 times [2019-12-07 17:22:37,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:22:37,113 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049727232] [2019-12-07 17:22:37,113 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:22:37,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:22:37,206 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:22:37,206 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049727232] [2019-12-07 17:22:37,206 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139232835] [2019-12-07 17:22:37,206 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5d162747-1751-4ece-a827-3daa4c2b903e/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 [2019-12-07 17:22:37,249 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-12-07 17:22:37,250 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 17:22:37,250 INFO L264 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-07 17:22:37,251 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:22:37,310 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 35 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:22:37,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:22:37,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2019-12-07 17:22:37,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199315926] [2019-12-07 17:22:37,311 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-07 17:22:37,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:22:37,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-07 17:22:37,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2019-12-07 17:22:37,311 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 19 states. [2019-12-07 17:22:37,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:22:37,450 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2019-12-07 17:22:37,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-07 17:22:37,450 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 32 [2019-12-07 17:22:37,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:22:37,450 INFO L225 Difference]: With dead ends: 59 [2019-12-07 17:22:37,451 INFO L226 Difference]: Without dead ends: 38 [2019-12-07 17:22:37,451 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2019-12-07 17:22:37,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-12-07 17:22:37,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2019-12-07 17:22:37,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-12-07 17:22:37,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2019-12-07 17:22:37,454 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 32 [2019-12-07 17:22:37,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:22:37,455 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2019-12-07 17:22:37,455 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-07 17:22:37,455 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2019-12-07 17:22:37,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-12-07 17:22:37,455 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:22:37,455 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:22:37,656 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:22:37,656 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:22:37,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:22:37,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1635696442, now seen corresponding path program 13 times [2019-12-07 17:22:37,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:22:37,657 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852663069] [2019-12-07 17:22:37,658 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:22:37,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:22:38,481 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:22:38,481 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852663069] [2019-12-07 17:22:38,481 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065594703] [2019-12-07 17:22:38,481 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5d162747-1751-4ece-a827-3daa4c2b903e/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 [2019-12-07 17:22:38,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:22:38,507 WARN L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 57 conjunts are in the unsatisfiable core [2019-12-07 17:22:38,509 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:22:38,513 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 [2019-12-07 17:22:38,513 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:22:38,524 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:22:38,526 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 [2019-12-07 17:22:38,526 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 17:22:38,531 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:22:38,531 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:22:38,531 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2019-12-07 17:22:38,561 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 [2019-12-07 17:22:38,561 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:22:38,567 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:22:38,568 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:22:38,568 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:29 [2019-12-07 17:22:38,639 INFO L343 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2019-12-07 17:22:38,640 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 [2019-12-07 17:22:38,640 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:22:38,648 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:22:38,648 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:22:38,648 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:41 [2019-12-07 17:22:38,754 INFO L343 Elim1Store]: treesize reduction 10, result has 87.7 percent of original size [2019-12-07 17:22:38,754 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 [2019-12-07 17:22:38,754 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:22:38,779 INFO L614 ElimStorePlain]: treesize reduction 54, result has 45.5 percent of original size [2019-12-07 17:22:38,780 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:22:38,780 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:45 [2019-12-07 17:22:38,909 INFO L343 Elim1Store]: treesize reduction 32, result has 77.5 percent of original size [2019-12-07 17:22:38,909 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 [2019-12-07 17:22:38,910 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:22:38,959 INFO L614 ElimStorePlain]: treesize reduction 84, result has 39.1 percent of original size [2019-12-07 17:22:38,959 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:22:38,959 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:58, output treesize:54 [2019-12-07 17:22:39,112 INFO L343 Elim1Store]: treesize reduction 114, result has 51.7 percent of original size [2019-12-07 17:22:39,113 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 [2019-12-07 17:22:39,113 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:22:39,152 INFO L614 ElimStorePlain]: treesize reduction 84, result has 45.1 percent of original size [2019-12-07 17:22:39,152 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:22:39,152 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:73, output treesize:69 [2019-12-07 17:22:39,415 INFO L343 Elim1Store]: treesize reduction 112, result has 38.1 percent of original size [2019-12-07 17:22:39,415 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 [2019-12-07 17:22:39,416 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:22:39,429 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:22:39,429 INFO L534 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. [2019-12-07 17:22:39,429 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:97, output treesize:72 [2019-12-07 17:22:40,334 WARN L192 SmtUtils]: Spent 859.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2019-12-07 17:22:40,821 WARN L192 SmtUtils]: Spent 427.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2019-12-07 17:22:40,908 INFO L343 Elim1Store]: treesize reduction 112, result has 57.7 percent of original size [2019-12-07 17:22:40,908 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 [2019-12-07 17:22:40,910 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:22:40,955 INFO L614 ElimStorePlain]: treesize reduction 210, result has 30.7 percent of original size [2019-12-07 17:22:40,956 INFO L534 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. [2019-12-07 17:22:40,956 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:108, output treesize:93 [2019-12-07 17:22:41,779 WARN L192 SmtUtils]: Spent 746.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2019-12-07 17:22:42,621 WARN L192 SmtUtils]: Spent 756.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2019-12-07 17:22:42,783 WARN L192 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 99 [2019-12-07 17:22:42,783 INFO L343 Elim1Store]: treesize reduction 112, result has 69.3 percent of original size [2019-12-07 17:22:42,784 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 119 treesize of output 367 [2019-12-07 17:22:42,785 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:22:42,856 INFO L614 ElimStorePlain]: treesize reduction 314, result has 24.2 percent of original size [2019-12-07 17:22:42,856 INFO L534 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. [2019-12-07 17:22:42,856 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:129, output treesize:100 [2019-12-07 17:22:45,710 WARN L192 SmtUtils]: Spent 2.79 s on a formula simplification that was a NOOP. DAG size: 55 [2019-12-07 17:22:48,378 WARN L192 SmtUtils]: Spent 2.59 s on a formula simplification that was a NOOP. DAG size: 61 [2019-12-07 17:22:48,647 WARN L192 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 135 [2019-12-07 17:22:48,648 INFO L343 Elim1Store]: treesize reduction 112, result has 76.7 percent of original size [2019-12-07 17:22:48,648 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 497 [2019-12-07 17:22:48,650 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:22:48,726 INFO L614 ElimStorePlain]: treesize reduction 488, result has 17.7 percent of original size [2019-12-07 17:22:48,726 INFO L534 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. [2019-12-07 17:22:48,727 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:136, output treesize:105 [2019-12-07 17:22:51,516 WARN L192 SmtUtils]: Spent 2.71 s on a formula simplification that was a NOOP. DAG size: 59 [2019-12-07 17:22:54,672 WARN L192 SmtUtils]: Spent 3.08 s on a formula simplification that was a NOOP. DAG size: 65 [2019-12-07 17:22:55,071 WARN L192 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 175 [2019-12-07 17:22:55,072 INFO L343 Elim1Store]: treesize reduction 112, result has 81.7 percent of original size [2019-12-07 17:22:55,072 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 131 treesize of output 641 [2019-12-07 17:22:55,075 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:22:55,193 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 61 [2019-12-07 17:22:55,194 INFO L614 ElimStorePlain]: treesize reduction 940, result has 11.8 percent of original size [2019-12-07 17:22:55,194 INFO L534 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. [2019-12-07 17:22:55,195 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:141, output treesize:126 [2019-12-07 17:22:55,334 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 17:22:55,389 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:22:55,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:22:55,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25] total 51 [2019-12-07 17:22:55,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036172627] [2019-12-07 17:22:55,390 INFO L442 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-12-07 17:22:55,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:22:55,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-12-07 17:22:55,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=2392, Unknown=0, NotChecked=0, Total=2550 [2019-12-07 17:22:55,391 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand 51 states. [2019-12-07 17:22:56,686 WARN L192 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2019-12-07 17:22:58,960 WARN L192 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2019-12-07 17:23:01,492 WARN L192 SmtUtils]: Spent 2.48 s on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2019-12-07 17:23:04,335 WARN L192 SmtUtils]: Spent 2.72 s on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2019-12-07 17:23:04,677 WARN L192 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2019-12-07 17:23:05,173 WARN L192 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2019-12-07 17:23:08,748 WARN L192 SmtUtils]: Spent 3.51 s on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2019-12-07 17:23:14,650 WARN L192 SmtUtils]: Spent 5.74 s on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2019-12-07 17:23:19,992 WARN L192 SmtUtils]: Spent 5.24 s on a formula simplification. DAG size of input: 79 DAG size of output: 64 [2019-12-07 17:23:24,742 WARN L192 SmtUtils]: Spent 4.67 s on a formula simplification. DAG size of input: 82 DAG size of output: 68 [2019-12-07 17:23:25,664 WARN L192 SmtUtils]: Spent 812.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2019-12-07 17:23:26,642 WARN L192 SmtUtils]: Spent 913.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2019-12-07 17:23:26,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:23:26,909 INFO L93 Difference]: Finished difference Result 84 states and 100 transitions. [2019-12-07 17:23:26,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-12-07 17:23:26,910 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 34 [2019-12-07 17:23:26,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:23:26,910 INFO L225 Difference]: With dead ends: 84 [2019-12-07 17:23:26,910 INFO L226 Difference]: Without dead ends: 62 [2019-12-07 17:23:26,912 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1445 ImplicationChecksByTransitivity, 46.2s TimeCoverageRelationStatistics Valid=363, Invalid=5187, Unknown=0, NotChecked=0, Total=5550 [2019-12-07 17:23:26,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-12-07 17:23:26,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 49. [2019-12-07 17:23:26,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-12-07 17:23:26,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2019-12-07 17:23:26,917 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 34 [2019-12-07 17:23:26,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:23:26,918 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2019-12-07 17:23:26,918 INFO L463 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-12-07 17:23:26,918 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2019-12-07 17:23:26,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-12-07 17:23:26,918 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:23:26,918 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:23:27,119 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:23:27,119 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:23:27,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:23:27,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1979212484, now seen corresponding path program 2 times [2019-12-07 17:23:27,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:23:27,120 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799211611] [2019-12-07 17:23:27,120 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:23:27,129 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 17:23:27,129 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [421552870] [2019-12-07 17:23:27,129 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5d162747-1751-4ece-a827-3daa4c2b903e/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 [2019-12-07 17:23:27,204 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 17:23:27,205 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 17:23:27,207 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 33 conjunts are in the unsatisfiable core [2019-12-07 17:23:27,209 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:23:27,296 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 [2019-12-07 17:23:27,297 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:23:27,311 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:23:27,311 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:23:27,311 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2019-12-07 17:23:27,391 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:23:27,392 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 [2019-12-07 17:23:27,392 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:23:27,410 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:23:27,411 INFO L534 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. [2019-12-07 17:23:27,411 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:32 [2019-12-07 17:23:27,472 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:23:27,473 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:23:27,473 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:23:27,474 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:23:27,475 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 [2019-12-07 17:23:27,475 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:23:27,482 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:23:27,482 INFO L534 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. [2019-12-07 17:23:27,482 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:60, output treesize:35 [2019-12-07 17:23:27,514 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:23:27,515 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:23:27,516 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:23:27,516 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:23:27,517 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 [2019-12-07 17:23:27,517 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:23:27,525 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:23:27,525 INFO L534 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. [2019-12-07 17:23:27,525 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:60, output treesize:35 [2019-12-07 17:23:27,560 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:23:27,561 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:23:27,562 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:23:27,563 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:23:27,563 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 [2019-12-07 17:23:27,563 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:23:27,571 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:23:27,571 INFO L534 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. [2019-12-07 17:23:27,571 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:60, output treesize:30 [2019-12-07 17:23:27,618 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:23:27,619 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:23:27,619 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 [2019-12-07 17:23:27,619 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:23:27,622 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:23:27,622 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:23:27,622 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:3 [2019-12-07 17:23:27,636 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 18 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 17:23:27,636 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799211611] [2019-12-07 17:23:27,637 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 17:23:27,637 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421552870] [2019-12-07 17:23:27,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 17:23:27,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-12-07 17:23:27,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577362139] [2019-12-07 17:23:27,637 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-07 17:23:27,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:23:27,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-07 17:23:27,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-12-07 17:23:27,638 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 15 states. [2019-12-07 17:23:28,523 WARN L192 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2019-12-07 17:23:30,199 WARN L192 SmtUtils]: Spent 1.66 s on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2019-12-07 17:23:30,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:23:30,247 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2019-12-07 17:23:30,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-07 17:23:30,247 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2019-12-07 17:23:30,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:23:30,248 INFO L225 Difference]: With dead ends: 62 [2019-12-07 17:23:30,248 INFO L226 Difference]: Without dead ends: 53 [2019-12-07 17:23:30,248 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2019-12-07 17:23:30,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-12-07 17:23:30,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2019-12-07 17:23:30,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-12-07 17:23:30,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2019-12-07 17:23:30,254 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 34 [2019-12-07 17:23:30,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:23:30,254 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2019-12-07 17:23:30,254 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-07 17:23:30,254 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2019-12-07 17:23:30,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-12-07 17:23:30,255 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:23:30,255 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:23:30,455 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:23:30,455 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:23:30,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:23:30,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1893861880, now seen corresponding path program 3 times [2019-12-07 17:23:30,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:23:30,456 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275618720] [2019-12-07 17:23:30,456 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:23:30,464 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 17:23:30,464 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1744387699] [2019-12-07 17:23:30,464 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5d162747-1751-4ece-a827-3daa4c2b903e/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 [2019-12-07 17:23:30,519 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-12-07 17:23:30,519 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 17:23:30,520 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 33 conjunts are in the unsatisfiable core [2019-12-07 17:23:30,522 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:23:30,539 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 [2019-12-07 17:23:30,539 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:23:30,543 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:23:30,543 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:23:30,544 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2019-12-07 17:23:30,565 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:23:30,565 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 [2019-12-07 17:23:30,565 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:23:30,579 INFO L614 ElimStorePlain]: treesize reduction 30, result has 49.2 percent of original size [2019-12-07 17:23:30,580 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:23:30,580 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:29 [2019-12-07 17:23:30,703 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:23:30,703 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 [2019-12-07 17:23:30,704 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:23:30,728 INFO L614 ElimStorePlain]: treesize reduction 66, result has 40.5 percent of original size [2019-12-07 17:23:30,729 INFO L534 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. [2019-12-07 17:23:30,729 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:45 [2019-12-07 17:23:38,447 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:23:38,448 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:23:38,455 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:23:38,456 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 [2019-12-07 17:23:38,456 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:23:38,471 INFO L614 ElimStorePlain]: treesize reduction 24, result has 60.7 percent of original size [2019-12-07 17:23:38,471 INFO L534 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. [2019-12-07 17:23:38,472 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:62, output treesize:37 [2019-12-07 17:23:38,855 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:23:38,856 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:23:38,864 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:23:38,864 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 [2019-12-07 17:23:38,864 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:23:38,889 INFO L614 ElimStorePlain]: treesize reduction 44, result has 45.7 percent of original size [2019-12-07 17:23:38,890 INFO L534 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. [2019-12-07 17:23:38,890 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:62, output treesize:32 [2019-12-07 17:23:38,942 INFO L172 IndexEqualityManager]: detected equality via solver [2019-12-07 17:23:38,949 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:23:38,949 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 [2019-12-07 17:23:38,950 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:23:38,957 INFO L614 ElimStorePlain]: treesize reduction 22, result has 35.3 percent of original size [2019-12-07 17:23:38,957 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:23:38,957 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:7 [2019-12-07 17:23:38,972 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-12-07 17:23:38,973 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275618720] [2019-12-07 17:23:38,973 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 17:23:38,973 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744387699] [2019-12-07 17:23:38,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 17:23:38,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-12-07 17:23:38,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988251890] [2019-12-07 17:23:38,973 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-07 17:23:38,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:23:38,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-07 17:23:38,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=141, Unknown=5, NotChecked=0, Total=182 [2019-12-07 17:23:38,974 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 14 states. [2019-12-07 17:23:47,577 WARN L192 SmtUtils]: Spent 3.87 s on a formula simplification that was a NOOP. DAG size: 32 [2019-12-07 17:23:50,828 WARN L192 SmtUtils]: Spent 2.30 s on a formula simplification that was a NOOP. DAG size: 33 [2019-12-07 17:23:53,394 WARN L192 SmtUtils]: Spent 2.19 s on a formula simplification that was a NOOP. DAG size: 33 [2019-12-07 17:23:53,828 WARN L192 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2019-12-07 17:24:03,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:24:03,909 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2019-12-07 17:24:03,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-07 17:24:03,912 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2019-12-07 17:24:03,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:24:03,912 INFO L225 Difference]: With dead ends: 64 [2019-12-07 17:24:03,912 INFO L226 Difference]: Without dead ends: 52 [2019-12-07 17:24:03,913 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 22.6s TimeCoverageRelationStatistics Valid=86, Invalid=283, Unknown=11, NotChecked=0, Total=380 [2019-12-07 17:24:03,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-12-07 17:24:03,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-12-07 17:24:03,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-12-07 17:24:03,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2019-12-07 17:24:03,919 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 34 [2019-12-07 17:24:03,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:24:03,919 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2019-12-07 17:24:03,919 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-07 17:24:03,919 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2019-12-07 17:24:03,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-12-07 17:24:03,919 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:24:03,919 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:24:04,120 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:24:04,120 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:24:04,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:24:04,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1035254296, now seen corresponding path program 14 times [2019-12-07 17:24:04,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:24:04,120 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609271122] [2019-12-07 17:24:04,120 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:24:04,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:24:04,198 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 16 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:24:04,198 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609271122] [2019-12-07 17:24:04,198 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778841540] [2019-12-07 17:24:04,198 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5d162747-1751-4ece-a827-3daa4c2b903e/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 [2019-12-07 17:24:04,224 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 17:24:04,224 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 17:24:04,225 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-07 17:24:04,226 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:24:04,285 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 25 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:24:04,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:24:04,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2019-12-07 17:24:04,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305927766] [2019-12-07 17:24:04,286 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-07 17:24:04,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:24:04,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-07 17:24:04,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2019-12-07 17:24:04,287 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand 22 states. [2019-12-07 17:24:04,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:24:04,569 INFO L93 Difference]: Finished difference Result 63 states and 70 transitions. [2019-12-07 17:24:04,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-07 17:24:04,569 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 36 [2019-12-07 17:24:04,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:24:04,569 INFO L225 Difference]: With dead ends: 63 [2019-12-07 17:24:04,570 INFO L226 Difference]: Without dead ends: 59 [2019-12-07 17:24:04,570 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=265, Invalid=857, Unknown=0, NotChecked=0, Total=1122 [2019-12-07 17:24:04,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-12-07 17:24:04,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 43. [2019-12-07 17:24:04,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-12-07 17:24:04,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2019-12-07 17:24:04,575 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 36 [2019-12-07 17:24:04,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:24:04,575 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2019-12-07 17:24:04,575 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-12-07 17:24:04,575 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2019-12-07 17:24:04,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-12-07 17:24:04,575 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:24:04,576 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:24:04,776 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:24:04,776 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:24:04,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:24:04,777 INFO L82 PathProgramCache]: Analyzing trace with hash -127223707, now seen corresponding path program 15 times [2019-12-07 17:24:04,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:24:04,777 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131144334] [2019-12-07 17:24:04,777 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:24:04,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:24:04,882 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 38 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:24:04,882 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131144334] [2019-12-07 17:24:04,882 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552109260] [2019-12-07 17:24:04,882 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5d162747-1751-4ece-a827-3daa4c2b903e/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 [2019-12-07 17:24:04,938 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-12-07 17:24:04,938 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 17:24:04,939 INFO L264 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-07 17:24:04,940 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:24:05,009 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 51 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:24:05,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:24:05,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2019-12-07 17:24:05,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851249538] [2019-12-07 17:24:05,010 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-07 17:24:05,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:24:05,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-07 17:24:05,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2019-12-07 17:24:05,010 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 22 states. [2019-12-07 17:24:05,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:24:05,151 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2019-12-07 17:24:05,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-07 17:24:05,152 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 37 [2019-12-07 17:24:05,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:24:05,152 INFO L225 Difference]: With dead ends: 67 [2019-12-07 17:24:05,152 INFO L226 Difference]: Without dead ends: 43 [2019-12-07 17:24:05,153 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2019-12-07 17:24:05,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-12-07 17:24:05,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2019-12-07 17:24:05,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-12-07 17:24:05,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2019-12-07 17:24:05,157 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 37 [2019-12-07 17:24:05,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:24:05,157 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2019-12-07 17:24:05,158 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-12-07 17:24:05,158 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2019-12-07 17:24:05,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-12-07 17:24:05,158 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:24:05,158 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:24:05,358 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:24:05,359 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:24:05,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:24:05,359 INFO L82 PathProgramCache]: Analyzing trace with hash 639592647, now seen corresponding path program 16 times [2019-12-07 17:24:05,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:24:05,360 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874052503] [2019-12-07 17:24:05,360 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:24:05,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:24:06,232 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:24:06,232 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874052503] [2019-12-07 17:24:06,232 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132265642] [2019-12-07 17:24:06,232 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5d162747-1751-4ece-a827-3daa4c2b903e/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 [2019-12-07 17:24:06,272 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 17:24:06,272 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 17:24:06,273 WARN L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 65 conjunts are in the unsatisfiable core [2019-12-07 17:24:06,275 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:24:06,278 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 [2019-12-07 17:24:06,279 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:24:06,284 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:24:06,286 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 [2019-12-07 17:24:06,286 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 17:24:06,291 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:24:06,291 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:24:06,291 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2019-12-07 17:24:06,324 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 [2019-12-07 17:24:06,324 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:24:06,331 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:24:06,331 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:24:06,331 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:29 [2019-12-07 17:24:06,424 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:24:06,424 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 [2019-12-07 17:24:06,425 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:24:06,446 INFO L614 ElimStorePlain]: treesize reduction 36, result has 55.6 percent of original size [2019-12-07 17:24:06,446 INFO L534 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. [2019-12-07 17:24:06,446 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:45 [2019-12-07 17:24:06,607 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:24:06,608 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 [2019-12-07 17:24:06,608 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:24:06,641 INFO L614 ElimStorePlain]: treesize reduction 72, result has 45.9 percent of original size [2019-12-07 17:24:06,642 INFO L534 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. [2019-12-07 17:24:06,642 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:65, output treesize:61 [2019-12-07 17:24:06,828 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:24:06,829 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 [2019-12-07 17:24:06,829 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:24:06,877 INFO L614 ElimStorePlain]: treesize reduction 108, result has 41.6 percent of original size [2019-12-07 17:24:06,877 INFO L534 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. [2019-12-07 17:24:06,878 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:77 [2019-12-07 17:24:07,103 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:24:07,103 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 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 [2019-12-07 17:24:07,104 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:24:07,166 INFO L614 ElimStorePlain]: treesize reduction 144, result has 39.2 percent of original size [2019-12-07 17:24:07,166 INFO L534 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. [2019-12-07 17:24:07,167 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:97, output treesize:93 [2019-12-07 17:24:07,473 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2019-12-07 17:24:07,473 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:24:07,474 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 [2019-12-07 17:24:07,474 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:24:07,562 INFO L614 ElimStorePlain]: treesize reduction 180, result has 37.7 percent of original size [2019-12-07 17:24:07,563 INFO L534 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. [2019-12-07 17:24:07,563 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:113, output treesize:109 [2019-12-07 17:24:13,188 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:24:13,188 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 [2019-12-07 17:24:13,190 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:24:13,291 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 66 [2019-12-07 17:24:13,292 INFO L614 ElimStorePlain]: treesize reduction 560, result has 19.2 percent of original size [2019-12-07 17:24:13,293 INFO L534 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. [2019-12-07 17:24:13,293 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:150, output treesize:133 [2019-12-07 17:24:13,832 WARN L192 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2019-12-07 17:24:13,833 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:24:13,833 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 [2019-12-07 17:24:13,835 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:24:13,936 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 74 [2019-12-07 17:24:13,936 INFO L614 ElimStorePlain]: treesize reduction 320, result has 30.6 percent of original size [2019-12-07 17:24:13,937 INFO L534 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. [2019-12-07 17:24:13,937 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:174, output treesize:141 [2019-12-07 17:24:14,702 WARN L192 SmtUtils]: Spent 539.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2019-12-07 17:24:15,073 WARN L192 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2019-12-07 17:24:15,073 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:24:15,074 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 [2019-12-07 17:24:15,076 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:24:15,190 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 81 [2019-12-07 17:24:15,190 INFO L614 ElimStorePlain]: treesize reduction 368, result has 29.9 percent of original size [2019-12-07 17:24:15,191 INFO L534 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. [2019-12-07 17:24:15,191 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 9 variables, input treesize:182, output treesize:157 [2019-12-07 17:24:15,984 WARN L192 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2019-12-07 17:24:15,984 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:24:15,984 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 [2019-12-07 17:24:15,987 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:24:16,139 WARN L192 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 88 [2019-12-07 17:24:16,140 INFO L614 ElimStorePlain]: treesize reduction 600, result has 22.4 percent of original size [2019-12-07 17:24:16,140 INFO L534 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. [2019-12-07 17:24:16,140 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 10 variables, input treesize:198, output treesize:173 [2019-12-07 17:24:17,284 WARN L192 SmtUtils]: Spent 467.00 ms on a formula simplification that was a NOOP. DAG size: 267 [2019-12-07 17:24:17,285 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:24:17,285 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 [2019-12-07 17:24:17,290 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:24:17,517 WARN L192 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 96 [2019-12-07 17:24:17,518 INFO L614 ElimStorePlain]: treesize reduction 1200, result has 14.2 percent of original size [2019-12-07 17:24:17,518 INFO L534 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. [2019-12-07 17:24:17,518 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 11 variables, input treesize:214, output treesize:199 [2019-12-07 17:24:29,551 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2019-12-07 17:24:30,210 WARN L192 SmtUtils]: Spent 645.00 ms on a formula simplification that was a NOOP. DAG size: 315 [2019-12-07 17:24:30,210 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:24:30,210 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 [2019-12-07 17:24:30,216 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:24:30,454 WARN L192 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 80 [2019-12-07 17:24:30,455 INFO L614 ElimStorePlain]: treesize reduction 1392, result has 9.4 percent of original size [2019-12-07 17:24:30,625 INFO L534 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. [2019-12-07 17:24:30,625 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 15 variables, input treesize:243, output treesize:116 [2019-12-07 17:24:30,771 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 17:24:30,883 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:24:30,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:24:30,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 35] total 65 [2019-12-07 17:24:30,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735988261] [2019-12-07 17:24:30,883 INFO L442 AbstractCegarLoop]: Interpolant automaton has 65 states [2019-12-07 17:24:30,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:24:30,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2019-12-07 17:24:30,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=3930, Unknown=0, NotChecked=0, Total=4160 [2019-12-07 17:24:30,885 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 65 states. [2019-12-07 17:24:50,619 WARN L192 SmtUtils]: Spent 546.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2019-12-07 17:25:06,340 WARN L192 SmtUtils]: Spent 633.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 74 [2019-12-07 17:25:09,946 WARN L192 SmtUtils]: Spent 1.68 s on a formula simplification. DAG size of input: 99 DAG size of output: 84 [2019-12-07 17:25:11,194 WARN L192 SmtUtils]: Spent 645.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 89 [2019-12-07 17:25:27,839 WARN L192 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 108 DAG size of output: 90 [2019-12-07 17:25:34,022 WARN L192 SmtUtils]: Spent 849.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 95 [2019-12-07 17:25:46,115 WARN L192 SmtUtils]: Spent 630.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2019-12-07 17:26:08,293 WARN L192 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 110 [2019-12-07 17:26:26,334 WARN L192 SmtUtils]: Spent 781.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 113 [2019-12-07 17:26:50,244 WARN L192 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 112 [2019-12-07 17:27:04,217 WARN L192 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 119 [2019-12-07 17:27:18,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:27:18,048 INFO L93 Difference]: Finished difference Result 88 states and 100 transitions. [2019-12-07 17:27:18,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-12-07 17:27:18,048 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 39 [2019-12-07 17:27:18,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:27:18,049 INFO L225 Difference]: With dead ends: 88 [2019-12-07 17:27:18,049 INFO L226 Difference]: Without dead ends: 65 [2019-12-07 17:27:18,051 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 7 SyntacticMatches, 5 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2234 ImplicationChecksByTransitivity, 60.7s TimeCoverageRelationStatistics Valid=570, Invalid=8934, Unknown=2, NotChecked=0, Total=9506 [2019-12-07 17:27:18,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-12-07 17:27:18,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 60. [2019-12-07 17:27:18,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-12-07 17:27:18,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2019-12-07 17:27:18,059 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 39 [2019-12-07 17:27:18,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:27:18,059 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2019-12-07 17:27:18,059 INFO L463 AbstractCegarLoop]: Interpolant automaton has 65 states. [2019-12-07 17:27:18,059 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2019-12-07 17:27:18,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-12-07 17:27:18,060 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:27:18,060 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:27:18,260 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:27:18,260 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:27:18,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:27:18,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1319651017, now seen corresponding path program 4 times [2019-12-07 17:27:18,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:27:18,261 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234354083] [2019-12-07 17:27:18,261 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:27:18,268 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 17:27:18,268 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [331054351] [2019-12-07 17:27:18,268 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5d162747-1751-4ece-a827-3daa4c2b903e/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 [2019-12-07 17:27:18,320 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 17:27:18,320 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 17:27:18,321 INFO L264 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 33 conjunts are in the unsatisfiable core [2019-12-07 17:27:18,322 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:27:18,325 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 [2019-12-07 17:27:18,325 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:27:18,328 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:27:18,328 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:27:18,328 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-12-07 17:27:18,357 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 [2019-12-07 17:27:18,357 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:27:18,362 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:27:18,362 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:27:18,362 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2019-12-07 17:27:18,799 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:27:18,799 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 [2019-12-07 17:27:18,800 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:27:18,818 INFO L614 ElimStorePlain]: treesize reduction 36, result has 51.4 percent of original size [2019-12-07 17:27:18,818 INFO L534 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. [2019-12-07 17:27:18,818 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:38 [2019-12-07 17:27:19,116 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:27:19,116 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 [2019-12-07 17:27:19,116 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:27:19,137 INFO L614 ElimStorePlain]: treesize reduction 96, result has 30.9 percent of original size [2019-12-07 17:27:19,137 INFO L534 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. [2019-12-07 17:27:19,138 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:68, output treesize:43 [2019-12-07 17:27:19,173 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:27:19,173 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 [2019-12-07 17:27:19,173 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:27:19,195 INFO L614 ElimStorePlain]: treesize reduction 80, result has 35.0 percent of original size [2019-12-07 17:27:19,195 INFO L534 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. [2019-12-07 17:27:19,195 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:68, output treesize:43 [2019-12-07 17:27:19,231 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:27:19,232 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 [2019-12-07 17:27:19,232 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:27:19,255 INFO L614 ElimStorePlain]: treesize reduction 80, result has 35.0 percent of original size [2019-12-07 17:27:19,255 INFO L534 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. [2019-12-07 17:27:19,255 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:68, output treesize:43 [2019-12-07 17:27:19,291 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:27:19,292 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 [2019-12-07 17:27:19,292 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:27:19,313 INFO L614 ElimStorePlain]: treesize reduction 48, result has 47.3 percent of original size [2019-12-07 17:27:19,313 INFO L534 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. [2019-12-07 17:27:19,313 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:68, output treesize:39 [2019-12-07 17:27:19,367 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:27:19,368 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 [2019-12-07 17:27:19,368 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:27:19,380 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:27:19,380 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 17:27:19,381 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 17:27:19,382 INFO L534 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:27:19,382 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:50, output treesize:85 [2019-12-07 17:27:19,425 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 17:27:19,463 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 31 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:27:19,463 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234354083] [2019-12-07 17:27:19,463 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 17:27:19,463 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331054351] [2019-12-07 17:27:19,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 17:27:19,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2019-12-07 17:27:19,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733046600] [2019-12-07 17:27:19,464 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-12-07 17:27:19,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:27:19,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-12-07 17:27:19,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2019-12-07 17:27:19,464 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand 21 states. [2019-12-07 17:27:25,350 WARN L192 SmtUtils]: Spent 635.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2019-12-07 17:27:28,259 WARN L192 SmtUtils]: Spent 552.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2019-12-07 17:27:29,411 WARN L192 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2019-12-07 17:27:30,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:27:30,129 INFO L93 Difference]: Finished difference Result 85 states and 93 transitions. [2019-12-07 17:27:30,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-07 17:27:30,129 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 39 [2019-12-07 17:27:30,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:27:30,129 INFO L225 Difference]: With dead ends: 85 [2019-12-07 17:27:30,130 INFO L226 Difference]: Without dead ends: 76 [2019-12-07 17:27:30,130 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=472, Invalid=1973, Unknown=5, NotChecked=0, Total=2450 [2019-12-07 17:27:30,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-12-07 17:27:30,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2019-12-07 17:27:30,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-12-07 17:27:30,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2019-12-07 17:27:30,140 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 39 [2019-12-07 17:27:30,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:27:30,141 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2019-12-07 17:27:30,141 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-12-07 17:27:30,141 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2019-12-07 17:27:30,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-12-07 17:27:30,141 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:27:30,141 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:27:30,341 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:27:30,342 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:27:30,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:27:30,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1184266071, now seen corresponding path program 17 times [2019-12-07 17:27:30,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:27:30,343 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590914417] [2019-12-07 17:27:30,343 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:27:30,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:27:30,447 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 25 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:27:30,448 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590914417] [2019-12-07 17:27:30,448 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861727110] [2019-12-07 17:27:30,448 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5d162747-1751-4ece-a827-3daa4c2b903e/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 [2019-12-07 17:27:30,534 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2019-12-07 17:27:30,534 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 17:27:30,535 INFO L264 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-07 17:27:30,536 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:27:30,610 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 36 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:27:30,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:27:30,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2019-12-07 17:27:30,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701975689] [2019-12-07 17:27:30,611 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-12-07 17:27:30,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:27:30,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-12-07 17:27:30,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2019-12-07 17:27:30,611 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand 25 states. [2019-12-07 17:27:30,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:27:30,951 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2019-12-07 17:27:30,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-07 17:27:30,951 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 41 [2019-12-07 17:27:30,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:27:30,952 INFO L225 Difference]: With dead ends: 76 [2019-12-07 17:27:30,952 INFO L226 Difference]: Without dead ends: 72 [2019-12-07 17:27:30,952 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=342, Invalid=1140, Unknown=0, NotChecked=0, Total=1482 [2019-12-07 17:27:30,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-12-07 17:27:30,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2019-12-07 17:27:30,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-12-07 17:27:30,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2019-12-07 17:27:30,965 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 41 [2019-12-07 17:27:30,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:27:30,966 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2019-12-07 17:27:30,966 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-12-07 17:27:30,966 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2019-12-07 17:27:30,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-12-07 17:27:30,966 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:27:30,966 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:27:31,167 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:27:31,167 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:27:31,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:27:31,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1126332488, now seen corresponding path program 18 times [2019-12-07 17:27:31,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:27:31,168 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855963455] [2019-12-07 17:27:31,168 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:27:31,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:27:31,276 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 54 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:27:31,276 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855963455] [2019-12-07 17:27:31,276 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207643323] [2019-12-07 17:27:31,276 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5d162747-1751-4ece-a827-3daa4c2b903e/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 [2019-12-07 17:27:31,349 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2019-12-07 17:27:31,349 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 17:27:31,350 INFO L264 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-07 17:27:31,351 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:27:31,440 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 70 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:27:31,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:27:31,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2019-12-07 17:27:31,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137697745] [2019-12-07 17:27:31,440 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-12-07 17:27:31,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:27:31,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-12-07 17:27:31,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2019-12-07 17:27:31,441 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand 25 states. [2019-12-07 17:27:31,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:27:31,607 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2019-12-07 17:27:31,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-07 17:27:31,607 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 42 [2019-12-07 17:27:31,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:27:31,607 INFO L225 Difference]: With dead ends: 77 [2019-12-07 17:27:31,607 INFO L226 Difference]: Without dead ends: 48 [2019-12-07 17:27:31,608 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=247, Invalid=745, Unknown=0, NotChecked=0, Total=992 [2019-12-07 17:27:31,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-12-07 17:27:31,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2019-12-07 17:27:31,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-12-07 17:27:31,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2019-12-07 17:27:31,613 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 42 [2019-12-07 17:27:31,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:27:31,613 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2019-12-07 17:27:31,613 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-12-07 17:27:31,613 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2019-12-07 17:27:31,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-07 17:27:31,613 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:27:31,613 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:27:31,814 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:27:31,814 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:27:31,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:27:31,814 INFO L82 PathProgramCache]: Analyzing trace with hash -70138730, now seen corresponding path program 19 times [2019-12-07 17:27:31,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:27:31,814 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524707334] [2019-12-07 17:27:31,814 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:27:31,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:27:32,897 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2019-12-07 17:27:33,225 WARN L192 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2019-12-07 17:27:33,745 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:27:33,746 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524707334] [2019-12-07 17:27:33,746 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637888808] [2019-12-07 17:27:33,746 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5d162747-1751-4ece-a827-3daa4c2b903e/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 [2019-12-07 17:27:33,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:27:33,776 WARN L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 73 conjunts are in the unsatisfiable core [2019-12-07 17:27:33,777 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:27:33,780 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 [2019-12-07 17:27:33,780 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:27:33,786 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:27:33,789 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 [2019-12-07 17:27:33,789 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 17:27:33,794 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:27:33,794 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:27:33,795 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2019-12-07 17:27:33,835 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 [2019-12-07 17:27:33,836 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:27:33,842 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:27:33,842 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:27:33,842 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:29 [2019-12-07 17:27:33,943 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:27:33,943 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 [2019-12-07 17:27:33,944 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:27:33,963 INFO L614 ElimStorePlain]: treesize reduction 24, result has 60.0 percent of original size [2019-12-07 17:27:33,963 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:27:33,964 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:36 [2019-12-07 17:27:34,082 INFO L343 Elim1Store]: treesize reduction 10, result has 87.7 percent of original size [2019-12-07 17:27:34,082 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 [2019-12-07 17:27:34,083 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:27:34,107 INFO L614 ElimStorePlain]: treesize reduction 54, result has 45.5 percent of original size [2019-12-07 17:27:34,108 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:27:34,108 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:45 [2019-12-07 17:27:34,248 INFO L343 Elim1Store]: treesize reduction 77, result has 51.9 percent of original size [2019-12-07 17:27:34,248 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 [2019-12-07 17:27:34,249 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:27:34,277 INFO L614 ElimStorePlain]: treesize reduction 54, result has 51.4 percent of original size [2019-12-07 17:27:34,277 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:27:34,277 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:61, output treesize:57 [2019-12-07 17:27:34,465 INFO L343 Elim1Store]: treesize reduction 66, result has 69.3 percent of original size [2019-12-07 17:27:34,465 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 [2019-12-07 17:27:34,466 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:27:34,509 INFO L614 ElimStorePlain]: treesize reduction 114, result has 35.6 percent of original size [2019-12-07 17:27:34,509 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:27:34,509 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:67, output treesize:63 [2019-12-07 17:27:35,082 WARN L192 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 57 [2019-12-07 17:27:35,084 INFO L343 Elim1Store]: treesize reduction 112, result has 62.7 percent of original size [2019-12-07 17:27:35,084 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 [2019-12-07 17:27:35,086 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:27:35,322 WARN L192 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 41 [2019-12-07 17:27:35,323 INFO L614 ElimStorePlain]: treesize reduction 144, result has 33.3 percent of original size [2019-12-07 17:27:35,324 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:27:35,324 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:76, output treesize:72 [2019-12-07 17:27:36,027 WARN L192 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 67 [2019-12-07 17:27:36,027 INFO L343 Elim1Store]: treesize reduction 170, result has 57.2 percent of original size [2019-12-07 17:27:36,027 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 [2019-12-07 17:27:36,028 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:27:36,094 INFO L614 ElimStorePlain]: treesize reduction 174, result has 32.6 percent of original size [2019-12-07 17:27:36,094 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:27:36,095 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:88, output treesize:84 [2019-12-07 17:27:36,854 WARN L192 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2019-12-07 17:27:37,270 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2019-12-07 17:27:37,657 WARN L192 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 53 [2019-12-07 17:27:37,658 INFO L343 Elim1Store]: treesize reduction 240, result has 28.8 percent of original size [2019-12-07 17:27:37,659 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 [2019-12-07 17:27:37,662 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:27:37,913 WARN L192 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2019-12-07 17:27:37,914 INFO L614 ElimStorePlain]: treesize reduction 56, result has 61.6 percent of original size [2019-12-07 17:27:37,915 INFO L534 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. [2019-12-07 17:27:37,916 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:115, output treesize:90 [2019-12-07 17:27:38,282 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2019-12-07 17:27:38,658 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 53 [2019-12-07 17:27:38,658 INFO L343 Elim1Store]: treesize reduction 240, result has 28.8 percent of original size [2019-12-07 17:27:38,659 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 [2019-12-07 17:27:38,660 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:27:38,701 INFO L614 ElimStorePlain]: treesize reduction 168, result has 36.4 percent of original size [2019-12-07 17:27:38,702 INFO L534 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. [2019-12-07 17:27:38,702 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:115, output treesize:96 [2019-12-07 17:27:38,957 INFO L343 Elim1Store]: treesize reduction 240, result has 28.8 percent of original size [2019-12-07 17:27:38,957 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 [2019-12-07 17:27:38,958 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:27:39,001 INFO L614 ElimStorePlain]: treesize reduction 162, result has 37.2 percent of original size [2019-12-07 17:27:39,001 INFO L534 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. [2019-12-07 17:27:39,001 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:115, output treesize:96 [2019-12-07 17:27:39,700 WARN L192 SmtUtils]: Spent 623.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2019-12-07 17:27:40,305 WARN L192 SmtUtils]: Spent 525.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2019-12-07 17:27:40,456 WARN L192 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 89 [2019-12-07 17:27:40,456 INFO L343 Elim1Store]: treesize reduction 240, result has 46.5 percent of original size [2019-12-07 17:27:40,457 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 [2019-12-07 17:27:40,458 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:27:40,511 INFO L614 ElimStorePlain]: treesize reduction 202, result has 35.5 percent of original size [2019-12-07 17:27:40,511 INFO L534 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. [2019-12-07 17:27:40,512 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:111 [2019-12-07 17:27:40,926 WARN L192 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 89 [2019-12-07 17:27:40,926 INFO L343 Elim1Store]: treesize reduction 240, result has 46.5 percent of original size [2019-12-07 17:27:40,926 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 [2019-12-07 17:27:40,928 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:27:41,002 INFO L614 ElimStorePlain]: treesize reduction 254, result has 30.4 percent of original size [2019-12-07 17:27:41,002 INFO L534 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. [2019-12-07 17:27:41,002 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:136, output treesize:111 [2019-12-07 17:27:41,357 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2019-12-07 17:27:42,142 WARN L192 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 89 [2019-12-07 17:27:42,143 INFO L343 Elim1Store]: treesize reduction 240, result has 46.5 percent of original size [2019-12-07 17:27:42,143 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 [2019-12-07 17:27:42,146 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:27:42,316 WARN L192 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 55 [2019-12-07 17:27:42,317 INFO L614 ElimStorePlain]: treesize reduction 160, result has 38.7 percent of original size [2019-12-07 17:27:42,317 INFO L534 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. [2019-12-07 17:27:42,318 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:136, output treesize:101 [2019-12-07 17:27:42,698 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2019-12-07 17:27:43,137 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 53 [2019-12-07 17:27:43,137 INFO L343 Elim1Store]: treesize reduction 240, result has 28.8 percent of original size [2019-12-07 17:27:43,138 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 [2019-12-07 17:27:43,139 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:27:43,188 INFO L614 ElimStorePlain]: treesize reduction 164, result has 37.9 percent of original size [2019-12-07 17:27:43,189 INFO L534 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. [2019-12-07 17:27:43,189 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:115, output treesize:100 [2019-12-07 17:27:43,306 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 17:27:43,386 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:27:43,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:27:43,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 33] total 67 [2019-12-07 17:27:43,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86306237] [2019-12-07 17:27:43,387 INFO L442 AbstractCegarLoop]: Interpolant automaton has 67 states [2019-12-07 17:27:43,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:27:43,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2019-12-07 17:27:43,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=4214, Unknown=0, NotChecked=0, Total=4422 [2019-12-07 17:27:43,388 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand 67 states. [2019-12-07 17:27:45,137 WARN L192 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2019-12-07 17:27:45,565 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2019-12-07 17:27:45,839 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2019-12-07 17:27:47,219 WARN L192 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2019-12-07 17:27:48,491 WARN L192 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2019-12-07 17:27:49,848 WARN L192 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2019-12-07 17:27:51,505 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2019-12-07 17:27:52,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:27:52,756 INFO L93 Difference]: Finished difference Result 106 states and 122 transitions. [2019-12-07 17:27:52,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-12-07 17:27:52,757 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 44 [2019-12-07 17:27:52,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:27:52,758 INFO L225 Difference]: With dead ends: 106 [2019-12-07 17:27:52,759 INFO L226 Difference]: Without dead ends: 78 [2019-12-07 17:27:52,763 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 14 SyntacticMatches, 6 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2599 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=479, Invalid=9223, Unknown=0, NotChecked=0, Total=9702 [2019-12-07 17:27:52,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-12-07 17:27:52,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 65. [2019-12-07 17:27:52,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-12-07 17:27:52,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2019-12-07 17:27:52,783 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 44 [2019-12-07 17:27:52,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:27:52,783 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2019-12-07 17:27:52,783 INFO L463 AbstractCegarLoop]: Interpolant automaton has 67 states. [2019-12-07 17:27:52,783 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2019-12-07 17:27:52,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-07 17:27:52,783 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:27:52,784 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:27:52,984 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:27:52,984 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:27:52,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:27:52,985 INFO L82 PathProgramCache]: Analyzing trace with hash 609919640, now seen corresponding path program 5 times [2019-12-07 17:27:52,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:27:52,986 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021632442] [2019-12-07 17:27:52,986 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:27:53,001 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 17:27:53,001 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1930250589] [2019-12-07 17:27:53,002 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5d162747-1751-4ece-a827-3daa4c2b903e/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 [2019-12-07 17:27:53,121 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2019-12-07 17:27:53,121 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 17:27:53,123 INFO L264 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 44 conjunts are in the unsatisfiable core [2019-12-07 17:27:53,124 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:27:53,127 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 [2019-12-07 17:27:53,127 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:27:53,130 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:27:53,130 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:27:53,131 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-12-07 17:27:53,168 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 [2019-12-07 17:27:53,168 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:27:53,173 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:27:53,173 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:27:53,174 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2019-12-07 17:27:53,199 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:27:53,199 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 [2019-12-07 17:27:53,199 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:27:53,206 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:27:53,207 INFO L534 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. [2019-12-07 17:27:53,207 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:31 [2019-12-07 17:27:53,252 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:27:53,252 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:27:53,253 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:27:53,254 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 [2019-12-07 17:27:53,254 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:27:53,263 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:27:53,263 INFO L534 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. [2019-12-07 17:27:53,263 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:34 [2019-12-07 17:27:53,289 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:27:53,290 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:27:53,291 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:27:53,291 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 [2019-12-07 17:27:53,292 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:27:53,299 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:27:53,300 INFO L534 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. [2019-12-07 17:27:53,300 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:34 [2019-12-07 17:27:53,324 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:27:53,325 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:27:53,326 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:27:53,326 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 [2019-12-07 17:27:53,326 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:27:53,334 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:27:53,334 INFO L534 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. [2019-12-07 17:27:53,334 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:34 [2019-12-07 17:27:53,360 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:27:53,361 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:27:53,362 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:27:53,362 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 [2019-12-07 17:27:53,362 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:27:53,370 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:27:53,371 INFO L534 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. [2019-12-07 17:27:53,371 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:34 [2019-12-07 17:27:53,398 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:27:53,399 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:27:53,400 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:27:53,401 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 [2019-12-07 17:27:53,401 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:27:53,410 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:27:53,410 INFO L534 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. [2019-12-07 17:27:53,410 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:59, output treesize:30 [2019-12-07 17:27:53,458 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:27:53,458 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:27:53,458 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 [2019-12-07 17:27:53,459 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:27:53,461 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:27:53,461 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:27:53,461 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:3 [2019-12-07 17:27:53,483 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 28 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 17:27:53,484 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021632442] [2019-12-07 17:27:53,484 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 17:27:53,484 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930250589] [2019-12-07 17:27:53,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 17:27:53,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-12-07 17:27:53,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561664249] [2019-12-07 17:27:53,484 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-07 17:27:53,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:27:53,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-07 17:27:53,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2019-12-07 17:27:53,485 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand 19 states. [2019-12-07 17:27:55,807 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2019-12-07 17:27:56,050 WARN L192 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 29 [2019-12-07 17:27:56,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:27:56,117 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2019-12-07 17:27:56,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-07 17:27:56,117 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 44 [2019-12-07 17:27:56,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:27:56,118 INFO L225 Difference]: With dead ends: 78 [2019-12-07 17:27:56,118 INFO L226 Difference]: Without dead ends: 69 [2019-12-07 17:27:56,118 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2019-12-07 17:27:56,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-12-07 17:27:56,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2019-12-07 17:27:56,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-12-07 17:27:56,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 75 transitions. [2019-12-07 17:27:56,127 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 75 transitions. Word has length 44 [2019-12-07 17:27:56,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:27:56,127 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 75 transitions. [2019-12-07 17:27:56,127 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-07 17:27:56,127 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 75 transitions. [2019-12-07 17:27:56,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-07 17:27:56,128 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:27:56,128 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:27:56,328 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:27:56,328 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:27:56,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:27:56,329 INFO L82 PathProgramCache]: Analyzing trace with hash 188026708, now seen corresponding path program 6 times [2019-12-07 17:27:56,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:27:56,329 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926902434] [2019-12-07 17:27:56,330 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:27:56,336 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 17:27:56,336 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [606693675] [2019-12-07 17:27:56,336 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5d162747-1751-4ece-a827-3daa4c2b903e/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 [2019-12-07 17:27:56,407 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2019-12-07 17:27:56,407 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 17:27:56,408 INFO L264 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 45 conjunts are in the unsatisfiable core [2019-12-07 17:27:56,409 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:27:56,416 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 [2019-12-07 17:27:56,416 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:27:56,421 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:27:56,421 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:27:56,421 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:20 [2019-12-07 17:27:56,442 INFO L343 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2019-12-07 17:27:56,442 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 [2019-12-07 17:27:56,442 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:27:56,447 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:27:56,447 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:27:56,447 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2019-12-07 17:27:56,469 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:27:56,470 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:27:56,471 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:27:56,471 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 [2019-12-07 17:27:56,471 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:27:56,480 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:27:56,480 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:27:56,481 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:47 [2019-12-07 17:27:56,560 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:27:56,561 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:27:56,562 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:27:56,564 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:27:56,574 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:27:56,574 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 [2019-12-07 17:27:56,574 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:27:56,599 INFO L614 ElimStorePlain]: treesize reduction 100, result has 35.5 percent of original size [2019-12-07 17:27:56,599 INFO L534 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. [2019-12-07 17:27:56,599 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:80, output treesize:55 [2019-12-07 17:27:56,625 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:27:56,627 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:27:56,627 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:27:56,629 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:27:56,639 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:27:56,639 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 [2019-12-07 17:27:56,640 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:27:56,665 INFO L614 ElimStorePlain]: treesize reduction 83, result has 39.9 percent of original size [2019-12-07 17:27:56,665 INFO L534 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. [2019-12-07 17:27:56,666 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:80, output treesize:55 [2019-12-07 17:27:56,695 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:27:56,697 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:27:56,697 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:27:56,699 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:27:56,710 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:27:56,710 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 [2019-12-07 17:27:56,710 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:27:56,737 INFO L614 ElimStorePlain]: treesize reduction 83, result has 39.9 percent of original size [2019-12-07 17:27:56,737 INFO L534 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. [2019-12-07 17:27:56,738 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:80, output treesize:55 [2019-12-07 17:27:56,769 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:27:56,771 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:27:56,772 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:27:56,774 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:27:56,784 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:27:56,784 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 [2019-12-07 17:27:56,785 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:27:56,810 INFO L614 ElimStorePlain]: treesize reduction 82, result has 40.1 percent of original size [2019-12-07 17:27:56,810 INFO L534 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. [2019-12-07 17:27:56,810 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:80, output treesize:50 [2019-12-07 17:27:56,850 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:27:56,851 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:27:56,852 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:27:56,863 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:27:56,863 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 [2019-12-07 17:27:56,863 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:27:56,876 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:27:56,876 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 17:27:56,876 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 17:27:56,877 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 17:27:56,877 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 17:27:56,878 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 17:27:56,878 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 17:27:56,878 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 17:27:56,879 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:27:56,879 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:52, output treesize:169 [2019-12-07 17:27:56,921 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-12-07 17:27:57,014 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 31 proven. 72 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-12-07 17:27:57,014 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926902434] [2019-12-07 17:27:57,014 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 17:27:57,014 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606693675] [2019-12-07 17:27:57,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 17:27:57,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2019-12-07 17:27:57,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6726886] [2019-12-07 17:27:57,014 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-07 17:27:57,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:27:57,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-07 17:27:57,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2019-12-07 17:27:57,015 INFO L87 Difference]: Start difference. First operand 68 states and 75 transitions. Second operand 22 states. [2019-12-07 17:27:58,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:27:58,050 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2019-12-07 17:27:58,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-07 17:27:58,051 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 44 [2019-12-07 17:27:58,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:27:58,052 INFO L225 Difference]: With dead ends: 87 [2019-12-07 17:27:58,052 INFO L226 Difference]: Without dead ends: 83 [2019-12-07 17:27:58,052 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=185, Invalid=1147, Unknown=0, NotChecked=0, Total=1332 [2019-12-07 17:27:58,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-12-07 17:27:58,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2019-12-07 17:27:58,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-12-07 17:27:58,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 75 transitions. [2019-12-07 17:27:58,067 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 75 transitions. Word has length 44 [2019-12-07 17:27:58,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:27:58,068 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 75 transitions. [2019-12-07 17:27:58,068 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-12-07 17:27:58,068 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 75 transitions. [2019-12-07 17:27:58,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-12-07 17:27:58,068 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:27:58,068 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:27:58,269 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:27:58,269 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:27:58,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:27:58,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1319780852, now seen corresponding path program 20 times [2019-12-07 17:27:58,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:27:58,270 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951454729] [2019-12-07 17:27:58,271 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:27:58,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:27:58,388 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 36 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:27:58,388 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951454729] [2019-12-07 17:27:58,388 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289558048] [2019-12-07 17:27:58,388 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5d162747-1751-4ece-a827-3daa4c2b903e/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 [2019-12-07 17:27:58,416 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 17:27:58,416 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 17:27:58,417 INFO L264 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 18 conjunts are in the unsatisfiable core [2019-12-07 17:27:58,417 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:27:58,508 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 49 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:27:58,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:27:58,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2019-12-07 17:27:58,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375342761] [2019-12-07 17:27:58,508 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-12-07 17:27:58,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:27:58,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-12-07 17:27:58,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2019-12-07 17:27:58,509 INFO L87 Difference]: Start difference. First operand 68 states and 75 transitions. Second operand 28 states. [2019-12-07 17:27:59,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:27:59,023 INFO L93 Difference]: Finished difference Result 87 states and 97 transitions. [2019-12-07 17:27:59,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-07 17:27:59,024 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 46 [2019-12-07 17:27:59,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:27:59,024 INFO L225 Difference]: With dead ends: 87 [2019-12-07 17:27:59,024 INFO L226 Difference]: Without dead ends: 83 [2019-12-07 17:27:59,024 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=429, Invalid=1463, Unknown=0, NotChecked=0, Total=1892 [2019-12-07 17:27:59,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-12-07 17:27:59,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 53. [2019-12-07 17:27:59,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-12-07 17:27:59,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2019-12-07 17:27:59,032 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 46 [2019-12-07 17:27:59,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:27:59,033 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2019-12-07 17:27:59,033 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-12-07 17:27:59,033 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2019-12-07 17:27:59,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-12-07 17:27:59,033 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:27:59,033 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:27:59,233 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:27:59,234 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:27:59,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:27:59,234 INFO L82 PathProgramCache]: Analyzing trace with hash -609786487, now seen corresponding path program 21 times [2019-12-07 17:27:59,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:27:59,235 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109879816] [2019-12-07 17:27:59,235 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:27:59,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:27:59,375 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 73 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:27:59,376 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109879816] [2019-12-07 17:27:59,376 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359179515] [2019-12-07 17:27:59,376 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5d162747-1751-4ece-a827-3daa4c2b903e/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 [2019-12-07 17:27:59,486 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-12-07 17:27:59,486 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 17:27:59,487 INFO L264 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 18 conjunts are in the unsatisfiable core [2019-12-07 17:27:59,488 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:27:59,601 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 92 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:27:59,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:27:59,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2019-12-07 17:27:59,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295225838] [2019-12-07 17:27:59,602 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-12-07 17:27:59,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:27:59,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-12-07 17:27:59,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2019-12-07 17:27:59,602 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 28 states. [2019-12-07 17:27:59,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:27:59,787 INFO L93 Difference]: Finished difference Result 83 states and 93 transitions. [2019-12-07 17:27:59,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-07 17:27:59,787 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 47 [2019-12-07 17:27:59,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:27:59,787 INFO L225 Difference]: With dead ends: 83 [2019-12-07 17:27:59,787 INFO L226 Difference]: Without dead ends: 53 [2019-12-07 17:27:59,788 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=309, Invalid=951, Unknown=0, NotChecked=0, Total=1260 [2019-12-07 17:27:59,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-12-07 17:27:59,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2019-12-07 17:27:59,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-12-07 17:27:59,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2019-12-07 17:27:59,795 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 47 [2019-12-07 17:27:59,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:27:59,795 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2019-12-07 17:27:59,795 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-12-07 17:27:59,795 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2019-12-07 17:27:59,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-12-07 17:27:59,795 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:27:59,796 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:27:59,996 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:27:59,996 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:27:59,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:27:59,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1295219861, now seen corresponding path program 22 times [2019-12-07 17:27:59,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:27:59,997 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50562953] [2019-12-07 17:27:59,998 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:28:00,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:28:01,611 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:28:01,612 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50562953] [2019-12-07 17:28:01,612 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343630799] [2019-12-07 17:28:01,612 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5d162747-1751-4ece-a827-3daa4c2b903e/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 [2019-12-07 17:28:01,661 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 17:28:01,661 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 17:28:01,663 WARN L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 81 conjunts are in the unsatisfiable core [2019-12-07 17:28:01,664 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:28:01,668 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 [2019-12-07 17:28:01,668 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:28:01,673 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:28:01,675 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 [2019-12-07 17:28:01,675 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 17:28:01,680 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:28:01,680 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:28:01,680 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2019-12-07 17:28:01,720 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 [2019-12-07 17:28:01,721 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:28:01,726 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:28:01,727 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:28:01,727 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:29 [2019-12-07 17:28:01,862 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:28:01,862 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 [2019-12-07 17:28:01,862 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:28:01,899 INFO L614 ElimStorePlain]: treesize reduction 36, result has 55.6 percent of original size [2019-12-07 17:28:01,900 INFO L534 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. [2019-12-07 17:28:01,900 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:45 [2019-12-07 17:28:02,369 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:28:02,369 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 [2019-12-07 17:28:02,370 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:28:02,416 INFO L614 ElimStorePlain]: treesize reduction 72, result has 45.9 percent of original size [2019-12-07 17:28:02,417 INFO L534 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. [2019-12-07 17:28:02,417 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:65, output treesize:61 [2019-12-07 17:28:03,076 WARN L192 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2019-12-07 17:28:03,077 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:28:03,078 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 [2019-12-07 17:28:03,079 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:28:03,237 WARN L192 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2019-12-07 17:28:03,238 INFO L614 ElimStorePlain]: treesize reduction 108, result has 41.6 percent of original size [2019-12-07 17:28:03,239 INFO L534 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. [2019-12-07 17:28:03,239 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:77 [2019-12-07 17:28:03,599 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:28:03,599 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 [2019-12-07 17:28:03,599 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:28:03,668 INFO L614 ElimStorePlain]: treesize reduction 144, result has 39.2 percent of original size [2019-12-07 17:28:03,669 INFO L534 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. [2019-12-07 17:28:03,669 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:97, output treesize:93 [2019-12-07 17:28:04,032 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2019-12-07 17:28:04,033 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:28:04,033 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 [2019-12-07 17:28:04,034 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:28:04,121 INFO L614 ElimStorePlain]: treesize reduction 180, result has 37.7 percent of original size [2019-12-07 17:28:04,122 INFO L534 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. [2019-12-07 17:28:04,122 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:113, output treesize:109 [2019-12-07 17:28:04,995 WARN L192 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2019-12-07 17:28:04,995 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:28:04,995 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 [2019-12-07 17:28:04,997 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:28:05,106 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 67 [2019-12-07 17:28:05,106 INFO L614 ElimStorePlain]: treesize reduction 216, result has 36.7 percent of original size [2019-12-07 17:28:05,107 INFO L534 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. [2019-12-07 17:28:05,107 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:129, output treesize:125 [2019-12-07 17:28:14,196 WARN L192 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2019-12-07 17:28:14,196 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:28:14,197 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 [2019-12-07 17:28:14,198 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:28:14,335 WARN L192 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 74 [2019-12-07 17:28:14,335 INFO L614 ElimStorePlain]: treesize reduction 252, result has 35.9 percent of original size [2019-12-07 17:28:14,336 INFO L534 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. [2019-12-07 17:28:14,336 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:145, output treesize:141 [2019-12-07 17:29:30,543 WARN L194 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2019-12-07 17:29:30,544 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") [2019-12-07 17:29:30,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 17:29:30,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2019-12-07 17:29:30,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080201816] [2019-12-07 17:29:30,544 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-12-07 17:29:30,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:29:30,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-12-07 17:29:30,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=2846, Unknown=0, NotChecked=0, Total=3080 [2019-12-07 17:29:30,545 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand 40 states. [2019-12-07 17:29:30,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-12-07 17:29:30,745 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:29:30,747 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@77fd82c3 at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.managedscript.ManagedScript.lock(ManagedScript.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:354) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:202) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:127) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ProtectiveHoareTripleChecker.checkInternal(ProtectiveHoareTripleChecker.java:60) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.EfficientHoareTripleChecker.checkInternal(EfficientHoareTripleChecker.java:62) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:359) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:234) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1066) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:968) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:188) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:698) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:627) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:454) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:139) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:126) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-12-07 17:29:30,754 INFO L168 Benchmark]: Toolchain (without parser) took 447683.10 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.7 MB). Free memory was 945.1 MB in the beginning and 910.1 MB in the end (delta: 35.0 MB). Peak memory consumption was 169.7 MB. Max. memory is 11.5 GB. [2019-12-07 17:29:30,755 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 961.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 17:29:30,755 INFO L168 Benchmark]: CACSL2BoogieTranslator took 188.79 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 98.0 MB). Free memory was 945.1 MB in the beginning and 1.1 GB in the end (delta: -146.6 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. [2019-12-07 17:29:30,756 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.60 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 17:29:30,756 INFO L168 Benchmark]: Boogie Preprocessor took 16.83 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 17:29:30,757 INFO L168 Benchmark]: RCFGBuilder took 168.19 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.9 MB). Peak memory consumption was 21.9 MB. Max. memory is 11.5 GB. [2019-12-07 17:29:30,757 INFO L168 Benchmark]: TraceAbstraction took 447282.47 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 36.7 MB). Free memory was 1.1 GB in the beginning and 910.1 MB in the end (delta: 159.7 MB). Peak memory consumption was 196.4 MB. Max. memory is 11.5 GB. [2019-12-07 17:29:30,760 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 961.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 188.79 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 98.0 MB). Free memory was 945.1 MB in the beginning and 1.1 GB in the end (delta: -146.6 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 23.60 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.83 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 168.19 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.9 MB). Peak memory consumption was 21.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 447282.47 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 36.7 MB). Free memory was 1.1 GB in the beginning and 910.1 MB in the end (delta: 159.7 MB). Peak memory consumption was 196.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@77fd82c3 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@77fd82c3: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.managedscript.ManagedScript.lock(ManagedScript.java:83) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.25-f470102 [2019-12-07 17:29:31,833 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 17:29:31,834 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 17:29:31,842 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 17:29:31,842 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 17:29:31,843 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 17:29:31,844 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 17:29:31,845 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 17:29:31,846 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 17:29:31,847 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 17:29:31,848 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 17:29:31,848 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 17:29:31,849 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 17:29:31,849 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 17:29:31,850 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 17:29:31,851 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 17:29:31,851 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 17:29:31,852 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 17:29:31,854 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 17:29:31,855 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 17:29:31,856 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 17:29:31,857 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 17:29:31,858 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 17:29:31,858 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 17:29:31,860 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 17:29:31,860 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 17:29:31,861 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 17:29:31,861 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 17:29:31,862 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 17:29:31,862 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 17:29:31,862 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 17:29:31,863 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 17:29:31,863 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 17:29:31,864 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 17:29:31,865 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 17:29:31,865 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 17:29:31,865 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 17:29:31,865 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 17:29:31,866 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 17:29:31,866 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 17:29:31,867 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 17:29:31,867 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_5d162747-1751-4ece-a827-3daa4c2b903e/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2019-12-07 17:29:31,877 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 17:29:31,877 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 17:29:31,878 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 17:29:31,878 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 17:29:31,878 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 17:29:31,879 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 17:29:31,879 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 17:29:31,879 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 17:29:31,879 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 17:29:31,879 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 17:29:31,879 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 17:29:31,879 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 17:29:31,880 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-12-07 17:29:31,880 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-12-07 17:29:31,880 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 17:29:31,880 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 17:29:31,880 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 17:29:31,880 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 17:29:31,881 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 17:29:31,881 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 17:29:31,881 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 17:29:31,881 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 17:29:31,881 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 17:29:31,881 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 17:29:31,881 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 17:29:31,882 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 17:29:31,882 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-12-07 17:29:31,882 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-12-07 17:29:31,882 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 17:29:31,882 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 17:29:31,882 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 17:29:31,882 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_5d162747-1751-4ece-a827-3daa4c2b903e/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 [2019-12-07 17:29:32,058 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 17:29:32,065 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 17:29:32,068 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 17:29:32,069 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 17:29:32,069 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 17:29:32,069 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_5d162747-1751-4ece-a827-3daa4c2b903e/bin/uautomizer/../../sv-benchmarks/c/array-fpi/s5if.c [2019-12-07 17:29:32,108 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5d162747-1751-4ece-a827-3daa4c2b903e/bin/uautomizer/data/961986203/daaeaab84c474f8c8876a706cb3a8d27/FLAG3c2f63868 [2019-12-07 17:29:32,425 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 17:29:32,426 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_5d162747-1751-4ece-a827-3daa4c2b903e/sv-benchmarks/c/array-fpi/s5if.c [2019-12-07 17:29:32,430 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5d162747-1751-4ece-a827-3daa4c2b903e/bin/uautomizer/data/961986203/daaeaab84c474f8c8876a706cb3a8d27/FLAG3c2f63868 [2019-12-07 17:29:32,439 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_5d162747-1751-4ece-a827-3daa4c2b903e/bin/uautomizer/data/961986203/daaeaab84c474f8c8876a706cb3a8d27 [2019-12-07 17:29:32,442 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 17:29:32,443 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 17:29:32,444 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 17:29:32,444 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 17:29:32,447 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 17:29:32,447 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 05:29:32" (1/1) ... [2019-12-07 17:29:32,450 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bb84b85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:29:32, skipping insertion in model container [2019-12-07 17:29:32,450 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 05:29:32" (1/1) ... [2019-12-07 17:29:32,456 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 17:29:32,468 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 17:29:32,588 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 17:29:32,595 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 17:29:32,609 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 17:29:32,650 INFO L208 MainTranslator]: Completed translation [2019-12-07 17:29:32,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:29:32 WrapperNode [2019-12-07 17:29:32,650 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 17:29:32,651 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 17:29:32,651 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 17:29:32,651 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 17:29:32,657 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:29:32" (1/1) ... [2019-12-07 17:29:32,663 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:29:32" (1/1) ... [2019-12-07 17:29:32,676 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 17:29:32,676 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 17:29:32,676 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 17:29:32,676 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 17:29:32,682 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:29:32" (1/1) ... [2019-12-07 17:29:32,682 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:29:32" (1/1) ... [2019-12-07 17:29:32,684 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:29:32" (1/1) ... [2019-12-07 17:29:32,684 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:29:32" (1/1) ... [2019-12-07 17:29:32,689 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:29:32" (1/1) ... [2019-12-07 17:29:32,692 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:29:32" (1/1) ... [2019-12-07 17:29:32,693 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:29:32" (1/1) ... [2019-12-07 17:29:32,695 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 17:29:32,695 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 17:29:32,695 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 17:29:32,696 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 17:29:32,696 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:29:32" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5d162747-1751-4ece-a827-3daa4c2b903e/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 [2019-12-07 17:29:32,736 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-07 17:29:32,736 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2019-12-07 17:29:32,736 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-12-07 17:29:32,736 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-12-07 17:29:32,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 17:29:32,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 17:29:32,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2019-12-07 17:29:32,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 17:29:32,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-12-07 17:29:32,914 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 17:29:32,915 INFO L287 CfgBuilder]: Removed 8 assume(true) statements. [2019-12-07 17:29:32,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 05:29:32 BoogieIcfgContainer [2019-12-07 17:29:32,915 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 17:29:32,916 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 17:29:32,916 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 17:29:32,918 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 17:29:32,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 05:29:32" (1/3) ... [2019-12-07 17:29:32,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@396cd227 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 05:29:32, skipping insertion in model container [2019-12-07 17:29:32,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:29:32" (2/3) ... [2019-12-07 17:29:32,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@396cd227 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 05:29:32, skipping insertion in model container [2019-12-07 17:29:32,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 05:29:32" (3/3) ... [2019-12-07 17:29:32,920 INFO L109 eAbstractionObserver]: Analyzing ICFG s5if.c [2019-12-07 17:29:32,926 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 17:29:32,930 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 17:29:32,937 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 17:29:32,951 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 17:29:32,951 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 17:29:32,951 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 17:29:32,951 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 17:29:32,951 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 17:29:32,951 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 17:29:32,951 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 17:29:32,952 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 17:29:32,960 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-12-07 17:29:32,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-07 17:29:32,963 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:29:32,964 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:29:32,964 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:29:32,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:29:32,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1476218026, now seen corresponding path program 1 times [2019-12-07 17:29:32,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-12-07 17:29:32,977 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1371802497] [2019-12-07 17:29:32,978 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5d162747-1751-4ece-a827-3daa4c2b903e/bin/uautomizer/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2019-12-07 17:29:33,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:29:33,024 INFO L264 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 1 conjunts are in the unsatisfiable core [2019-12-07 17:29:33,027 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:29:33,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:29:33,036 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 17:29:33,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:29:33,039 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1371802497] [2019-12-07 17:29:33,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-12-07 17:29:33,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-12-07 17:29:33,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748883104] [2019-12-07 17:29:33,042 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-12-07 17:29:33,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-12-07 17:29:33,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-12-07 17:29:33,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 17:29:33,053 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2019-12-07 17:29:33,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:29:33,063 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2019-12-07 17:29:33,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-12-07 17:29:33,064 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2019-12-07 17:29:33,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:29:33,070 INFO L225 Difference]: With dead ends: 29 [2019-12-07 17:29:33,070 INFO L226 Difference]: Without dead ends: 13 [2019-12-07 17:29:33,072 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 [2019-12-07 17:29:33,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-12-07 17:29:33,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-12-07 17:29:33,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-12-07 17:29:33,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2019-12-07 17:29:33,094 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 9 [2019-12-07 17:29:33,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:29:33,094 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2019-12-07 17:29:33,094 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-12-07 17:29:33,094 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2019-12-07 17:29:33,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-07 17:29:33,094 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:29:33,094 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:29:33,295 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2019-12-07 17:29:33,296 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:29:33,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:29:33,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1304115419, now seen corresponding path program 1 times [2019-12-07 17:29:33,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-12-07 17:29:33,298 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1359211812] [2019-12-07 17:29:33,299 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5d162747-1751-4ece-a827-3daa4c2b903e/bin/uautomizer/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2019-12-07 17:29:33,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:29:33,404 INFO L264 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 17:29:33,405 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:29:33,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:29:33,435 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 17:29:33,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:29:33,449 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1359211812] [2019-12-07 17:29:33,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-12-07 17:29:33,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-12-07 17:29:33,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638784007] [2019-12-07 17:29:33,451 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 17:29:33,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-12-07 17:29:33,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 17:29:33,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 17:29:33,452 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 4 states. [2019-12-07 17:29:33,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:29:33,585 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2019-12-07 17:29:33,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 17:29:33,586 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2019-12-07 17:29:33,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:29:33,587 INFO L225 Difference]: With dead ends: 23 [2019-12-07 17:29:33,587 INFO L226 Difference]: Without dead ends: 15 [2019-12-07 17:29:33,588 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 [2019-12-07 17:29:33,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-12-07 17:29:33,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2019-12-07 17:29:33,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-12-07 17:29:33,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2019-12-07 17:29:33,592 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9 [2019-12-07 17:29:33,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:29:33,592 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2019-12-07 17:29:33,592 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 17:29:33,592 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2019-12-07 17:29:33,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-07 17:29:33,593 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:29:33,593 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:29:33,794 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2019-12-07 17:29:33,794 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:29:33,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:29:33,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1358761923, now seen corresponding path program 1 times [2019-12-07 17:29:33,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-12-07 17:29:33,798 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1359907030] [2019-12-07 17:29:33,798 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5d162747-1751-4ece-a827-3daa4c2b903e/bin/uautomizer/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2019-12-07 17:29:33,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:29:33,870 INFO L264 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-07 17:29:33,871 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:29:33,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:29:33,923 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 17:29:33,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:29:33,983 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1359907030] [2019-12-07 17:29:33,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:29:33,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-12-07 17:29:33,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223860797] [2019-12-07 17:29:33,984 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 17:29:33,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-12-07 17:29:33,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 17:29:33,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-12-07 17:29:33,985 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 10 states. [2019-12-07 17:29:34,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:29:34,337 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2019-12-07 17:29:34,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 17:29:34,338 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 11 [2019-12-07 17:29:34,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:29:34,339 INFO L225 Difference]: With dead ends: 34 [2019-12-07 17:29:34,339 INFO L226 Difference]: Without dead ends: 27 [2019-12-07 17:29:34,339 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2019-12-07 17:29:34,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-12-07 17:29:34,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2019-12-07 17:29:34,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-12-07 17:29:34,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-12-07 17:29:34,343 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 11 [2019-12-07 17:29:34,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:29:34,343 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-12-07 17:29:34,343 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 17:29:34,344 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-12-07 17:29:34,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-07 17:29:34,344 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:29:34,344 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:29:34,545 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2019-12-07 17:29:34,545 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:29:34,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:29:34,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1565637502, now seen corresponding path program 1 times [2019-12-07 17:29:34,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-12-07 17:29:34,547 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1871722952] [2019-12-07 17:29:34,547 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5d162747-1751-4ece-a827-3daa4c2b903e/bin/uautomizer/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2019-12-07 17:29:34,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:29:34,623 INFO L264 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-07 17:29:34,624 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:29:34,655 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 [2019-12-07 17:29:34,656 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:29:34,675 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:29:34,680 INFO L172 IndexEqualityManager]: detected equality via solver [2019-12-07 17:29:34,691 INFO L343 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2019-12-07 17:29:34,692 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 1 case distinctions, treesize of input 20 treesize of output 21 [2019-12-07 17:29:34,692 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 17:29:34,709 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:29:34,709 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:29:34,709 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:39, output treesize:35 [2019-12-07 17:29:34,740 INFO L343 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2019-12-07 17:29:34,740 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 36 treesize of output 38 [2019-12-07 17:29:34,741 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:29:34,763 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:29:34,764 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:29:34,764 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:46 [2019-12-07 17:29:34,953 INFO L343 Elim1Store]: treesize reduction 37, result has 26.0 percent of original size [2019-12-07 17:29:34,953 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 84 treesize of output 49 [2019-12-07 17:29:34,955 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:29:34,974 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:29:34,975 INFO L534 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. [2019-12-07 17:29:34,976 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:64 [2019-12-07 17:29:35,023 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 17:29:35,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:29:35,053 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 17:29:37,968 WARN L192 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 36 [2019-12-07 17:29:37,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:29:37,981 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1871722952] [2019-12-07 17:29:37,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:29:37,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2019-12-07 17:29:37,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361703670] [2019-12-07 17:29:37,982 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-07 17:29:37,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-12-07 17:29:37,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-07 17:29:37,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2019-12-07 17:29:37,983 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 16 states. [2019-12-07 17:29:41,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:29:41,706 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2019-12-07 17:29:41,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-07 17:29:41,707 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 14 [2019-12-07 17:29:41,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:29:41,707 INFO L225 Difference]: With dead ends: 33 [2019-12-07 17:29:41,708 INFO L226 Difference]: Without dead ends: 27 [2019-12-07 17:29:41,708 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2019-12-07 17:29:41,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-12-07 17:29:41,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2019-12-07 17:29:41,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-12-07 17:29:41,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2019-12-07 17:29:41,711 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2019-12-07 17:29:41,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:29:41,712 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2019-12-07 17:29:41,712 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-07 17:29:41,712 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2019-12-07 17:29:41,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-07 17:29:41,712 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:29:41,712 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:29:41,913 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2019-12-07 17:29:41,914 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:29:41,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:29:41,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1508379200, now seen corresponding path program 1 times [2019-12-07 17:29:41,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-12-07 17:29:41,916 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1116366589] [2019-12-07 17:29:41,916 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5d162747-1751-4ece-a827-3daa4c2b903e/bin/uautomizer/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2019-12-07 17:29:41,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:29:41,987 INFO L264 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-07 17:29:41,988 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:29:41,994 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 [2019-12-07 17:29:41,994 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:29:41,996 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:29:41,996 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:29:41,996 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2019-12-07 17:29:42,011 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-12-07 17:29:42,011 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:29:42,013 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:29:42,013 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:29:42,013 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:5 [2019-12-07 17:29:42,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:29:42,020 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 17:29:42,038 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 [2019-12-07 17:29:42,041 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 [2019-12-07 17:29:42,041 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 17:29:42,043 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:29:42,043 INFO L534 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:29:42,044 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:29:42,045 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 17:29:42,045 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:16, output treesize:7 [2019-12-07 17:29:42,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:29:42,055 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1116366589] [2019-12-07 17:29:42,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:29:42,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2019-12-07 17:29:42,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876791283] [2019-12-07 17:29:42,056 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 17:29:42,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-12-07 17:29:42,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 17:29:42,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-12-07 17:29:42,056 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 8 states. [2019-12-07 17:29:42,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:29:42,405 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-12-07 17:29:42,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 17:29:42,415 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2019-12-07 17:29:42,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:29:42,416 INFO L225 Difference]: With dead ends: 31 [2019-12-07 17:29:42,416 INFO L226 Difference]: Without dead ends: 19 [2019-12-07 17:29:42,416 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-12-07 17:29:42,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-12-07 17:29:42,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2019-12-07 17:29:42,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-12-07 17:29:42,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2019-12-07 17:29:42,419 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 14 [2019-12-07 17:29:42,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:29:42,419 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2019-12-07 17:29:42,419 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 17:29:42,419 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2019-12-07 17:29:42,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-07 17:29:42,420 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:29:42,420 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:29:42,621 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2019-12-07 17:29:42,622 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:29:42,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:29:42,623 INFO L82 PathProgramCache]: Analyzing trace with hash -472130976, now seen corresponding path program 2 times [2019-12-07 17:29:42,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-12-07 17:29:42,624 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [746846083] [2019-12-07 17:29:42,624 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5d162747-1751-4ece-a827-3daa4c2b903e/bin/uautomizer/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2019-12-07 17:29:42,703 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 17:29:42,704 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 17:29:42,707 INFO L264 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-07 17:29:42,708 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:29:42,829 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:29:42,829 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 17:29:43,040 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:29:43,040 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [746846083] [2019-12-07 17:29:43,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:29:43,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2019-12-07 17:29:43,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523835608] [2019-12-07 17:29:43,041 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-07 17:29:43,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-12-07 17:29:43,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-07 17:29:43,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-12-07 17:29:43,042 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 16 states. [2019-12-07 17:29:43,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:29:43,580 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2019-12-07 17:29:43,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-07 17:29:43,581 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2019-12-07 17:29:43,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:29:43,582 INFO L225 Difference]: With dead ends: 42 [2019-12-07 17:29:43,582 INFO L226 Difference]: Without dead ends: 35 [2019-12-07 17:29:43,582 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2019-12-07 17:29:43,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-12-07 17:29:43,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2019-12-07 17:29:43,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-07 17:29:43,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2019-12-07 17:29:43,586 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 16 [2019-12-07 17:29:43,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:29:43,586 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2019-12-07 17:29:43,586 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-07 17:29:43,586 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2019-12-07 17:29:43,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-07 17:29:43,587 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:29:43,587 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:29:43,787 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2019-12-07 17:29:43,789 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:29:43,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:29:43,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1991965825, now seen corresponding path program 3 times [2019-12-07 17:29:43,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-12-07 17:29:43,791 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [793841989] [2019-12-07 17:29:43,791 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5d162747-1751-4ece-a827-3daa4c2b903e/bin/uautomizer/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2019-12-07 17:29:43,891 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-07 17:29:43,891 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 17:29:43,895 WARN L262 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 26 conjunts are in the unsatisfiable core [2019-12-07 17:29:43,896 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:29:43,903 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 [2019-12-07 17:29:43,904 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:29:43,923 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:29:43,928 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:29:43,929 INFO L172 IndexEqualityManager]: detected equality via solver [2019-12-07 17:29:43,929 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 20 treesize of output 21 [2019-12-07 17:29:43,930 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 17:29:43,945 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:29:43,945 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:29:43,946 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:45, output treesize:41 [2019-12-07 17:29:43,972 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:29:43,973 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 [2019-12-07 17:29:43,973 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:29:44,011 INFO L614 ElimStorePlain]: treesize reduction 4, result has 92.3 percent of original size [2019-12-07 17:29:44,011 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:29:44,012 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:56, output treesize:48 [2019-12-07 17:29:44,070 INFO L172 IndexEqualityManager]: detected equality via solver [2019-12-07 17:29:44,071 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:29:44,092 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:29:44,093 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 4 case distinctions, treesize of input 45 treesize of output 76 [2019-12-07 17:29:44,093 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:29:44,147 INFO L614 ElimStorePlain]: treesize reduction 36, result has 61.7 percent of original size [2019-12-07 17:29:44,147 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:29:44,148 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:66, output treesize:58 [2019-12-07 17:29:44,377 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:29:44,378 INFO L172 IndexEqualityManager]: detected equality via solver [2019-12-07 17:29:44,379 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:29:44,379 INFO L172 IndexEqualityManager]: detected equality via solver [2019-12-07 17:29:44,646 WARN L192 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2019-12-07 17:29:44,646 INFO L343 Elim1Store]: treesize reduction 32, result has 74.8 percent of original size [2019-12-07 17:29:44,647 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 13 case distinctions, treesize of input 116 treesize of output 146 [2019-12-07 17:29:44,649 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:29:44,705 INFO L614 ElimStorePlain]: treesize reduction 83, result has 47.5 percent of original size [2019-12-07 17:29:44,705 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:29:44,706 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:132, output treesize:75 [2019-12-07 17:29:44,821 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:29:44,821 INFO L172 IndexEqualityManager]: detected equality via solver [2019-12-07 17:29:44,871 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:29:44,872 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 8 case distinctions, treesize of input 109 treesize of output 137 [2019-12-07 17:29:44,873 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:29:44,940 INFO L614 ElimStorePlain]: treesize reduction 120, result has 43.7 percent of original size [2019-12-07 17:29:44,940 INFO L534 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. [2019-12-07 17:29:44,941 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:119, output treesize:93 [2019-12-07 17:29:45,002 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 17:29:45,050 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:29:45,050 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 17:29:48,049 WARN L192 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2019-12-07 17:29:49,118 WARN L192 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2019-12-07 17:29:49,133 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:29:49,133 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [793841989] [2019-12-07 17:29:49,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:29:49,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2019-12-07 17:29:49,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229758147] [2019-12-07 17:29:49,134 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-12-07 17:29:49,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-12-07 17:29:49,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-12-07 17:29:49,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2019-12-07 17:29:49,135 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 26 states. [2019-12-07 17:29:52,490 WARN L192 SmtUtils]: Spent 1.51 s on a formula simplification. DAG size of input: 145 DAG size of output: 81 [2019-12-07 17:29:55,820 WARN L192 SmtUtils]: Spent 2.44 s on a formula simplification that was a NOOP. DAG size: 119 [2019-12-07 17:29:58,223 WARN L192 SmtUtils]: Spent 1.92 s on a formula simplification. DAG size of input: 84 DAG size of output: 56 [2019-12-07 17:30:10,154 WARN L192 SmtUtils]: Spent 7.11 s on a formula simplification. DAG size of input: 149 DAG size of output: 60 [2019-12-07 17:30:24,810 WARN L192 SmtUtils]: Spent 11.67 s on a formula simplification. DAG size of input: 153 DAG size of output: 64 [2019-12-07 17:30:24,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:30:24,874 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2019-12-07 17:30:24,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-07 17:30:24,876 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 19 [2019-12-07 17:30:24,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:30:24,876 INFO L225 Difference]: With dead ends: 37 [2019-12-07 17:30:24,876 INFO L226 Difference]: Without dead ends: 31 [2019-12-07 17:30:24,877 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 36.2s TimeCoverageRelationStatistics Valid=156, Invalid=834, Unknown=2, NotChecked=0, Total=992 [2019-12-07 17:30:24,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-12-07 17:30:24,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-12-07 17:30:24,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-07 17:30:24,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2019-12-07 17:30:24,880 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 19 [2019-12-07 17:30:24,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:30:24,880 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2019-12-07 17:30:24,880 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-12-07 17:30:24,881 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2019-12-07 17:30:24,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-07 17:30:24,881 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:30:24,881 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:30:25,081 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2019-12-07 17:30:25,082 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:30:25,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:30:25,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1934707523, now seen corresponding path program 1 times [2019-12-07 17:30:25,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-12-07 17:30:25,083 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [103573019] [2019-12-07 17:30:25,083 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5d162747-1751-4ece-a827-3daa4c2b903e/bin/uautomizer/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2019-12-07 17:30:25,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:30:25,188 INFO L264 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-07 17:30:25,189 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:30:25,193 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 [2019-12-07 17:30:25,194 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:30:25,199 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:30:25,199 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:30:25,199 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-12-07 17:30:25,216 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-12-07 17:30:25,217 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:30:25,223 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:30:25,223 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:30:25,224 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2019-12-07 17:30:25,255 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:30:25,273 INFO L343 Elim1Store]: treesize reduction 37, result has 26.0 percent of original size [2019-12-07 17:30:25,273 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 3 case distinctions, treesize of input 76 treesize of output 54 [2019-12-07 17:30:25,274 INFO L534 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-12-07 17:30:25,311 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:30:25,311 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-12-07 17:30:25,311 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:86, output treesize:66 [2019-12-07 17:30:29,406 WARN L192 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 37 [2019-12-07 17:30:31,489 WARN L192 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 37 [2019-12-07 17:30:31,497 INFO L343 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2019-12-07 17:30:31,498 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 27 [2019-12-07 17:30:31,498 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:30:31,502 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:30:31,503 INFO L534 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:30:31,503 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:57, output treesize:3 [2019-12-07 17:30:31,521 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:30:31,522 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 17:30:34,297 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [103573019] [2019-12-07 17:30:34,297 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: incompatible size [2019-12-07 17:30:34,297 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [865538913] [2019-12-07 17:30:34,297 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5d162747-1751-4ece-a827-3daa4c2b903e/bin/uautomizer/cvc4 Starting monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-12-07 17:30:34,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:30:34,502 INFO L264 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-07 17:30:34,503 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:30:34,504 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@41ad5984 [2019-12-07 17:30:34,504 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671441640] [2019-12-07 17:30:34,505 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5d162747-1751-4ece-a827-3daa4c2b903e/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 [2019-12-07 17:30:34,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:30:34,570 INFO L264 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-07 17:30:34,571 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:30:34,572 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@41ad5984 [2019-12-07 17:30:34,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2019-12-07 17:30:34,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2019-12-07 17:30:34,572 ERROR L206 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2019-12-07 17:30:34,572 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 17:30:35,176 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3,10 cvc4 --incremental --print-success --lang smt --rewrite-divk,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:30:35,190 WARN L229 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2019-12-07 17:30:35,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 05:30:35 BoogieIcfgContainer [2019-12-07 17:30:35,190 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 17:30:35,191 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 17:30:35,191 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 17:30:35,191 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 17:30:35,191 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 05:29:32" (3/4) ... [2019-12-07 17:30:35,193 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-12-07 17:30:35,193 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 17:30:35,194 INFO L168 Benchmark]: Toolchain (without parser) took 62751.62 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 276.8 MB). Free memory was 952.4 MB in the beginning and 1.2 GB in the end (delta: -207.5 MB). Peak memory consumption was 69.4 MB. Max. memory is 11.5 GB. [2019-12-07 17:30:35,194 INFO L168 Benchmark]: CDTParser took 0.13 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. [2019-12-07 17:30:35,195 INFO L168 Benchmark]: CACSL2BoogieTranslator took 207.05 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 143.1 MB). Free memory was 952.4 MB in the beginning and 1.1 GB in the end (delta: -185.1 MB). Peak memory consumption was 20.9 MB. Max. memory is 11.5 GB. [2019-12-07 17:30:35,195 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.90 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. [2019-12-07 17:30:35,195 INFO L168 Benchmark]: Boogie Preprocessor took 19.18 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: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. [2019-12-07 17:30:35,195 INFO L168 Benchmark]: RCFGBuilder took 220.15 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: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. [2019-12-07 17:30:35,196 INFO L168 Benchmark]: TraceAbstraction took 62274.39 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 133.7 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -47.1 MB). Peak memory consumption was 86.5 MB. Max. memory is 11.5 GB. [2019-12-07 17:30:35,196 INFO L168 Benchmark]: Witness Printer took 2.61 ms. Allocated memory is still 1.3 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 17:30:35,197 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 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 207.05 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 143.1 MB). Free memory was 952.4 MB in the beginning and 1.1 GB in the end (delta: -185.1 MB). Peak memory consumption was 20.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 24.90 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 19.18 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: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 220.15 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: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 62274.39 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 133.7 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -47.1 MB). Peak memory consumption was 86.5 MB. Max. memory is 11.5 GB. * Witness Printer took 2.61 ms. Allocated memory is still 1.3 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 10]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L14] int N; [L18] N = __VERIFIER_nondet_int() [L19] COND FALSE !(N <= 0) [L22] int i; [L23] long long sum[1]; [L24] int *a = malloc(sizeof(int)*N); [L26] sum[0] = 0 [L27] i=0 [L27] COND TRUE i