./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/s1if.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 678e0110 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_a91dab41-7999-4d9e-bdec-59f879816e69/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_a91dab41-7999-4d9e-bdec-59f879816e69/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a91dab41-7999-4d9e-bdec-59f879816e69/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a91dab41-7999-4d9e-bdec-59f879816e69/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/s1if.c -s /tmp/vcloud-vcloud-master/worker/run_dir_a91dab41-7999-4d9e-bdec-59f879816e69/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a91dab41-7999-4d9e-bdec-59f879816e69/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 13fdc940912285336197da9ffc7154669004c425 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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_a91dab41-7999-4d9e-bdec-59f879816e69/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_a91dab41-7999-4d9e-bdec-59f879816e69/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a91dab41-7999-4d9e-bdec-59f879816e69/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a91dab41-7999-4d9e-bdec-59f879816e69/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/s1if.c -s /tmp/vcloud-vcloud-master/worker/run_dir_a91dab41-7999-4d9e-bdec-59f879816e69/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a91dab41-7999-4d9e-bdec-59f879816e69/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 13fdc940912285336197da9ffc7154669004c425 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: AssertionError: incompatible size --- Real Ultimate output --- This is Ultimate 0.1.24-678e011 [2019-11-19 22:53:07,352 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-19 22:53:07,354 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-19 22:53:07,371 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-19 22:53:07,372 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-19 22:53:07,373 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-19 22:53:07,376 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-19 22:53:07,387 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-19 22:53:07,391 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-19 22:53:07,392 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-19 22:53:07,393 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-19 22:53:07,394 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-19 22:53:07,395 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-19 22:53:07,396 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-19 22:53:07,397 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-19 22:53:07,398 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-19 22:53:07,399 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-19 22:53:07,402 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-19 22:53:07,406 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-19 22:53:07,412 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-19 22:53:07,418 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-19 22:53:07,421 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-19 22:53:07,425 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-19 22:53:07,426 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-19 22:53:07,430 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-19 22:53:07,430 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-19 22:53:07,431 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-19 22:53:07,433 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-19 22:53:07,433 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-19 22:53:07,434 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-19 22:53:07,434 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-19 22:53:07,435 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-19 22:53:07,436 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-19 22:53:07,437 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-19 22:53:07,438 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-19 22:53:07,438 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-19 22:53:07,439 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-19 22:53:07,439 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-19 22:53:07,439 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-19 22:53:07,441 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-19 22:53:07,442 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-19 22:53:07,443 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a91dab41-7999-4d9e-bdec-59f879816e69/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-19 22:53:07,475 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-19 22:53:07,475 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-19 22:53:07,476 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-19 22:53:07,477 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-19 22:53:07,477 INFO L138 SettingsManager]: * Use SBE=true [2019-11-19 22:53:07,477 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-19 22:53:07,477 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-19 22:53:07,478 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-19 22:53:07,478 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-19 22:53:07,478 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-19 22:53:07,478 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-19 22:53:07,478 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-19 22:53:07,479 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-19 22:53:07,479 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-19 22:53:07,479 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-19 22:53:07,479 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-19 22:53:07,479 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-19 22:53:07,480 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-19 22:53:07,480 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-19 22:53:07,480 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-19 22:53:07,480 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-19 22:53:07,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-19 22:53:07,481 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-19 22:53:07,481 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-19 22:53:07,481 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-19 22:53:07,482 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-19 22:53:07,482 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-19 22:53:07,482 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-19 22:53:07,482 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_a91dab41-7999-4d9e-bdec-59f879816e69/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 -> 13fdc940912285336197da9ffc7154669004c425 [2019-11-19 22:53:07,715 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-19 22:53:07,733 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-19 22:53:07,736 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-19 22:53:07,738 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-19 22:53:07,738 INFO L275 PluginConnector]: CDTParser initialized [2019-11-19 22:53:07,740 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a91dab41-7999-4d9e-bdec-59f879816e69/bin/uautomizer/../../sv-benchmarks/c/array-fpi/s1if.c [2019-11-19 22:53:07,814 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a91dab41-7999-4d9e-bdec-59f879816e69/bin/uautomizer/data/bfbbfcb4b/1b9c3a72abd341d7b507029764d19eba/FLAG563d0d1e9 [2019-11-19 22:53:08,215 INFO L306 CDTParser]: Found 1 translation units. [2019-11-19 22:53:08,216 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a91dab41-7999-4d9e-bdec-59f879816e69/sv-benchmarks/c/array-fpi/s1if.c [2019-11-19 22:53:08,221 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a91dab41-7999-4d9e-bdec-59f879816e69/bin/uautomizer/data/bfbbfcb4b/1b9c3a72abd341d7b507029764d19eba/FLAG563d0d1e9 [2019-11-19 22:53:08,625 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a91dab41-7999-4d9e-bdec-59f879816e69/bin/uautomizer/data/bfbbfcb4b/1b9c3a72abd341d7b507029764d19eba [2019-11-19 22:53:08,628 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-19 22:53:08,630 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-19 22:53:08,631 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-19 22:53:08,631 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-19 22:53:08,635 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-19 22:53:08,636 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 10:53:08" (1/1) ... [2019-11-19 22:53:08,639 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38878cb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:53:08, skipping insertion in model container [2019-11-19 22:53:08,639 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 10:53:08" (1/1) ... [2019-11-19 22:53:08,647 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-19 22:53:08,666 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-19 22:53:08,857 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 22:53:08,969 INFO L188 MainTranslator]: Completed pre-run [2019-11-19 22:53:08,993 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 22:53:09,011 INFO L192 MainTranslator]: Completed translation [2019-11-19 22:53:09,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:53:09 WrapperNode [2019-11-19 22:53:09,011 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-19 22:53:09,012 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-19 22:53:09,013 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-19 22:53:09,013 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-19 22:53:09,023 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:53:09" (1/1) ... [2019-11-19 22:53:09,032 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:53:09" (1/1) ... [2019-11-19 22:53:09,056 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-19 22:53:09,057 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-19 22:53:09,057 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-19 22:53:09,057 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-19 22:53:09,068 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:53:09" (1/1) ... [2019-11-19 22:53:09,069 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:53:09" (1/1) ... [2019-11-19 22:53:09,071 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:53:09" (1/1) ... [2019-11-19 22:53:09,071 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:53:09" (1/1) ... [2019-11-19 22:53:09,078 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:53:09" (1/1) ... [2019-11-19 22:53:09,083 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:53:09" (1/1) ... [2019-11-19 22:53:09,085 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:53:09" (1/1) ... [2019-11-19 22:53:09,087 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-19 22:53:09,088 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-19 22:53:09,088 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-19 22:53:09,088 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-19 22:53:09,090 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:53:09" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a91dab41-7999-4d9e-bdec-59f879816e69/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-19 22:53:09,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-19 22:53:09,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-19 22:53:09,163 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-19 22:53:09,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-19 22:53:09,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-19 22:53:09,163 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-19 22:53:09,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-19 22:53:09,454 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-19 22:53:09,454 INFO L285 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-19 22:53:09,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 10:53:09 BoogieIcfgContainer [2019-11-19 22:53:09,456 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-19 22:53:09,457 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-19 22:53:09,457 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-19 22:53:09,460 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-19 22:53:09,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 10:53:08" (1/3) ... [2019-11-19 22:53:09,470 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55673fb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 10:53:09, skipping insertion in model container [2019-11-19 22:53:09,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:53:09" (2/3) ... [2019-11-19 22:53:09,471 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55673fb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 10:53:09, skipping insertion in model container [2019-11-19 22:53:09,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 10:53:09" (3/3) ... [2019-11-19 22:53:09,473 INFO L109 eAbstractionObserver]: Analyzing ICFG s1if.c [2019-11-19 22:53:09,497 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-19 22:53:09,503 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-19 22:53:09,544 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-19 22:53:09,589 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-19 22:53:09,591 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-19 22:53:09,592 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-19 22:53:09,592 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-19 22:53:09,592 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-19 22:53:09,592 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-19 22:53:09,593 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-19 22:53:09,593 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-19 22:53:09,612 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-11-19 22:53:09,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-19 22:53:09,621 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:53:09,622 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:53:09,622 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:53:09,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:53:09,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1476218026, now seen corresponding path program 1 times [2019-11-19 22:53:09,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:53:09,640 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060394305] [2019-11-19 22:53:09,640 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:53:09,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:53:09,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:53:09,838 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060394305] [2019-11-19 22:53:09,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 22:53:09,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-19 22:53:09,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313936736] [2019-11-19 22:53:09,848 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-19 22:53:09,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:53:09,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-19 22:53:09,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-19 22:53:09,864 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2019-11-19 22:53:09,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:53:09,880 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2019-11-19 22:53:09,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-19 22:53:09,882 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2019-11-19 22:53:09,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:53:09,891 INFO L225 Difference]: With dead ends: 29 [2019-11-19 22:53:09,891 INFO L226 Difference]: Without dead ends: 13 [2019-11-19 22:53:09,894 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-19 22:53:09,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-11-19 22:53:09,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-11-19 22:53:09,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-19 22:53:09,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2019-11-19 22:53:09,932 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 9 [2019-11-19 22:53:09,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:53:09,933 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2019-11-19 22:53:09,933 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-19 22:53:09,933 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2019-11-19 22:53:09,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-19 22:53:09,934 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:53:09,934 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:53:09,934 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:53:09,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:53:09,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1304115419, now seen corresponding path program 1 times [2019-11-19 22:53:09,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:53:09,935 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540503737] [2019-11-19 22:53:09,936 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:53:09,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:53:10,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:53:10,018 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540503737] [2019-11-19 22:53:10,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 22:53:10,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-19 22:53:10,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686257557] [2019-11-19 22:53:10,020 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-19 22:53:10,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:53:10,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-19 22:53:10,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-19 22:53:10,022 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 3 states. [2019-11-19 22:53:10,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:53:10,083 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2019-11-19 22:53:10,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-19 22:53:10,084 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-19 22:53:10,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:53:10,085 INFO L225 Difference]: With dead ends: 23 [2019-11-19 22:53:10,085 INFO L226 Difference]: Without dead ends: 15 [2019-11-19 22:53:10,086 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-19 22:53:10,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-19 22:53:10,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2019-11-19 22:53:10,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-19 22:53:10,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2019-11-19 22:53:10,091 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9 [2019-11-19 22:53:10,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:53:10,091 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2019-11-19 22:53:10,091 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-19 22:53:10,091 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2019-11-19 22:53:10,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-19 22:53:10,092 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:53:10,092 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:53:10,093 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:53:10,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:53:10,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1358761923, now seen corresponding path program 1 times [2019-11-19 22:53:10,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:53:10,094 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285243480] [2019-11-19 22:53:10,095 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:53:10,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:53:10,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-19 22:53:10,170 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285243480] [2019-11-19 22:53:10,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 22:53:10,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-19 22:53:10,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887639237] [2019-11-19 22:53:10,172 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-19 22:53:10,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:53:10,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-19 22:53:10,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-19 22:53:10,173 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 4 states. [2019-11-19 22:53:10,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:53:10,230 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2019-11-19 22:53:10,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-19 22:53:10,231 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-11-19 22:53:10,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:53:10,232 INFO L225 Difference]: With dead ends: 22 [2019-11-19 22:53:10,232 INFO L226 Difference]: Without dead ends: 18 [2019-11-19 22:53:10,233 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-19 22:53:10,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-19 22:53:10,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 15. [2019-11-19 22:53:10,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-19 22:53:10,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2019-11-19 22:53:10,238 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2019-11-19 22:53:10,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:53:10,238 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2019-11-19 22:53:10,238 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-19 22:53:10,238 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2019-11-19 22:53:10,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-19 22:53:10,239 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:53:10,239 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:53:10,240 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:53:10,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:53:10,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1565637502, now seen corresponding path program 1 times [2019-11-19 22:53:10,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:53:10,241 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252104262] [2019-11-19 22:53:10,241 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:53:10,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:53:10,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:53:10,736 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252104262] [2019-11-19 22:53:10,736 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480487746] [2019-11-19 22:53:10,736 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a91dab41-7999-4d9e-bdec-59f879816e69/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:53:10,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:53:10,818 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-19 22:53:10,827 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:53:10,911 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-19 22:53:10,912 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:53:10,928 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:53:10,937 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-19 22:53:10,937 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-19 22:53:10,949 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:53:10,949 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:53:10,950 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:30, output treesize:22 [2019-11-19 22:53:11,000 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2019-11-19 22:53:11,001 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:53:11,024 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:53:11,024 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:53:11,025 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2019-11-19 22:53:11,307 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:53:11,308 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 57 [2019-11-19 22:53:11,309 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:53:11,361 INFO L567 ElimStorePlain]: treesize reduction 24, result has 68.8 percent of original size [2019-11-19 22:53:11,363 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-11-19 22:53:11,364 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:70, output treesize:53 [2019-11-19 22:53:11,443 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:53:11,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:53:11,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:53:11,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2019-11-19 22:53:11,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253182788] [2019-11-19 22:53:11,491 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-19 22:53:11,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:53:11,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-19 22:53:11,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2019-11-19 22:53:11,493 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 16 states. [2019-11-19 22:53:12,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:53:12,225 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2019-11-19 22:53:12,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-19 22:53:12,229 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 14 [2019-11-19 22:53:12,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:53:12,232 INFO L225 Difference]: With dead ends: 33 [2019-11-19 22:53:12,232 INFO L226 Difference]: Without dead ends: 24 [2019-11-19 22:53:12,233 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2019-11-19 22:53:12,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-19 22:53:12,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2019-11-19 22:53:12,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-19 22:53:12,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2019-11-19 22:53:12,248 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 14 [2019-11-19 22:53:12,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:53:12,250 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2019-11-19 22:53:12,250 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-19 22:53:12,251 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2019-11-19 22:53:12,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-19 22:53:12,252 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:53:12,254 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:53:12,458 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:53:12,461 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:53:12,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:53:12,461 INFO L82 PathProgramCache]: Analyzing trace with hash -472130976, now seen corresponding path program 2 times [2019-11-19 22:53:12,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:53:12,462 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848593777] [2019-11-19 22:53:12,462 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:53:12,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:53:12,589 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:53:12,590 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848593777] [2019-11-19 22:53:12,590 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343660398] [2019-11-19 22:53:12,590 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a91dab41-7999-4d9e-bdec-59f879816e69/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:53:12,651 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-19 22:53:12,652 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:53:12,653 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-19 22:53:12,655 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:53:12,719 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:53:12,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:53:12,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2019-11-19 22:53:12,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772423819] [2019-11-19 22:53:12,720 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-19 22:53:12,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:53:12,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-19 22:53:12,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-19 22:53:12,721 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 10 states. [2019-11-19 22:53:12,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:53:12,933 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-11-19 22:53:12,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-19 22:53:12,934 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2019-11-19 22:53:12,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:53:12,935 INFO L225 Difference]: With dead ends: 31 [2019-11-19 22:53:12,935 INFO L226 Difference]: Without dead ends: 27 [2019-11-19 22:53:12,936 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2019-11-19 22:53:12,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-19 22:53:12,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2019-11-19 22:53:12,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-19 22:53:12,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2019-11-19 22:53:12,950 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 16 [2019-11-19 22:53:12,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:53:12,951 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2019-11-19 22:53:12,951 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-19 22:53:12,951 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2019-11-19 22:53:12,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-19 22:53:12,952 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:53:12,952 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:53:13,159 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:53:13,159 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:53:13,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:53:13,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1317941731, now seen corresponding path program 3 times [2019-11-19 22:53:13,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:53:13,161 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367134659] [2019-11-19 22:53:13,161 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:53:13,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:53:13,265 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:53:13,266 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367134659] [2019-11-19 22:53:13,266 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960680960] [2019-11-19 22:53:13,266 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a91dab41-7999-4d9e-bdec-59f879816e69/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:53:13,340 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-19 22:53:13,341 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:53:13,342 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-19 22:53:13,343 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:53:13,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:53:13,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:53:13,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2019-11-19 22:53:13,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265336164] [2019-11-19 22:53:13,396 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-19 22:53:13,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:53:13,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-19 22:53:13,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-11-19 22:53:13,397 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 10 states. [2019-11-19 22:53:13,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:53:13,544 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2019-11-19 22:53:13,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-19 22:53:13,547 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2019-11-19 22:53:13,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:53:13,548 INFO L225 Difference]: With dead ends: 35 [2019-11-19 22:53:13,548 INFO L226 Difference]: Without dead ends: 23 [2019-11-19 22:53:13,549 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-19 22:53:13,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-19 22:53:13,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2019-11-19 22:53:13,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-19 22:53:13,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2019-11-19 22:53:13,554 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 17 [2019-11-19 22:53:13,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:53:13,555 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2019-11-19 22:53:13,555 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-19 22:53:13,555 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2019-11-19 22:53:13,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-19 22:53:13,556 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:53:13,556 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:53:13,760 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:53:13,761 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:53:13,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:53:13,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1991965825, now seen corresponding path program 4 times [2019-11-19 22:53:13,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:53:13,761 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611448093] [2019-11-19 22:53:13,762 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:53:13,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:53:14,219 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:53:14,220 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611448093] [2019-11-19 22:53:14,220 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253272629] [2019-11-19 22:53:14,220 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a91dab41-7999-4d9e-bdec-59f879816e69/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:53:14,291 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-19 22:53:14,291 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:53:14,293 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2019-11-19 22:53:14,295 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:53:14,309 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-19 22:53:14,310 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:53:14,326 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:53:14,331 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-19 22:53:14,331 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-19 22:53:14,340 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:53:14,340 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:53:14,340 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2019-11-19 22:53:14,373 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2019-11-19 22:53:14,374 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:53:14,384 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:53:14,384 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:53:14,385 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:29 [2019-11-19 22:53:14,481 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:53:14,482 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 72 [2019-11-19 22:53:14,483 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:53:14,523 INFO L567 ElimStorePlain]: treesize reduction 36, result has 55.6 percent of original size [2019-11-19 22:53:14,524 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 22:53:14,524 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:45 [2019-11-19 22:53:14,810 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:53:14,810 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 103 [2019-11-19 22:53:14,812 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:53:14,884 INFO L567 ElimStorePlain]: treesize reduction 80, result has 46.3 percent of original size [2019-11-19 22:53:14,885 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-19 22:53:14,885 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:86, output treesize:69 [2019-11-19 22:53:15,145 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:53:15,146 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 85 treesize of output 165 [2019-11-19 22:53:15,150 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:53:15,259 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 38 [2019-11-19 22:53:15,261 INFO L567 ElimStorePlain]: treesize reduction 190, result has 28.6 percent of original size [2019-11-19 22:53:15,262 INFO L496 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-11-19 22:53:15,262 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:113, output treesize:66 [2019-11-19 22:53:15,341 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:53:15,388 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:53:15,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:53:15,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2019-11-19 22:53:15,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477001808] [2019-11-19 22:53:15,390 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-19 22:53:15,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:53:15,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-19 22:53:15,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2019-11-19 22:53:15,392 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 27 states. [2019-11-19 22:53:16,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:53:16,549 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2019-11-19 22:53:16,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-19 22:53:16,551 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 19 [2019-11-19 22:53:16,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:53:16,551 INFO L225 Difference]: With dead ends: 43 [2019-11-19 22:53:16,552 INFO L226 Difference]: Without dead ends: 32 [2019-11-19 22:53:16,553 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=173, Invalid=1233, Unknown=0, NotChecked=0, Total=1406 [2019-11-19 22:53:16,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-19 22:53:16,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2019-11-19 22:53:16,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-19 22:53:16,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-11-19 22:53:16,566 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 19 [2019-11-19 22:53:16,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:53:16,570 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-11-19 22:53:16,570 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-19 22:53:16,570 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-11-19 22:53:16,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-19 22:53:16,572 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:53:16,572 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:53:16,775 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:53:16,776 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:53:16,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:53:16,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1189058463, now seen corresponding path program 5 times [2019-11-19 22:53:16,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:53:16,776 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809938010] [2019-11-19 22:53:16,777 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:53:16,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:53:16,868 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:53:16,868 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809938010] [2019-11-19 22:53:16,868 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225534143] [2019-11-19 22:53:16,868 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a91dab41-7999-4d9e-bdec-59f879816e69/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:53:16,910 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-19 22:53:16,910 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:53:16,911 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-19 22:53:16,914 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:53:16,953 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:53:16,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:53:16,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2019-11-19 22:53:16,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686146706] [2019-11-19 22:53:16,954 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-19 22:53:16,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:53:16,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-19 22:53:16,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2019-11-19 22:53:16,955 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 13 states. [2019-11-19 22:53:17,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:53:17,165 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2019-11-19 22:53:17,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-19 22:53:17,166 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2019-11-19 22:53:17,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:53:17,167 INFO L225 Difference]: With dead ends: 39 [2019-11-19 22:53:17,167 INFO L226 Difference]: Without dead ends: 35 [2019-11-19 22:53:17,168 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2019-11-19 22:53:17,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-19 22:53:17,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2019-11-19 22:53:17,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-19 22:53:17,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2019-11-19 22:53:17,175 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 21 [2019-11-19 22:53:17,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:53:17,175 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2019-11-19 22:53:17,175 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-19 22:53:17,175 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2019-11-19 22:53:17,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-19 22:53:17,176 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:53:17,176 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:53:17,376 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:53:17,376 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:53:17,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:53:17,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1846717952, now seen corresponding path program 6 times [2019-11-19 22:53:17,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:53:17,377 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275683131] [2019-11-19 22:53:17,377 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:53:17,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:53:17,472 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:53:17,472 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275683131] [2019-11-19 22:53:17,472 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028649060] [2019-11-19 22:53:17,472 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a91dab41-7999-4d9e-bdec-59f879816e69/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:53:17,524 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-11-19 22:53:17,524 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:53:17,525 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-19 22:53:17,527 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:53:17,578 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:53:17,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:53:17,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2019-11-19 22:53:17,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829782743] [2019-11-19 22:53:17,580 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-19 22:53:17,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:53:17,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-19 22:53:17,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2019-11-19 22:53:17,581 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 13 states. [2019-11-19 22:53:17,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:53:17,771 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2019-11-19 22:53:17,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-19 22:53:17,772 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 22 [2019-11-19 22:53:17,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:53:17,773 INFO L225 Difference]: With dead ends: 43 [2019-11-19 22:53:17,773 INFO L226 Difference]: Without dead ends: 28 [2019-11-19 22:53:17,774 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-11-19 22:53:17,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-19 22:53:17,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2019-11-19 22:53:17,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-19 22:53:17,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2019-11-19 22:53:17,779 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2019-11-19 22:53:17,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:53:17,780 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2019-11-19 22:53:17,780 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-19 22:53:17,780 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2019-11-19 22:53:17,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-19 22:53:17,785 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:53:17,785 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:53:17,985 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:53:17,986 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:53:17,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:53:17,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1106368034, now seen corresponding path program 7 times [2019-11-19 22:53:17,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:53:17,987 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610202371] [2019-11-19 22:53:17,987 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:53:18,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:53:18,609 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:53:18,610 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610202371] [2019-11-19 22:53:18,610 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276003812] [2019-11-19 22:53:18,610 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a91dab41-7999-4d9e-bdec-59f879816e69/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:53:18,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:53:18,675 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 41 conjunts are in the unsatisfiable core [2019-11-19 22:53:18,680 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:53:18,688 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-19 22:53:18,689 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:53:18,700 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:53:18,709 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-19 22:53:18,709 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-19 22:53:18,719 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:53:18,720 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:53:18,720 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2019-11-19 22:53:18,766 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2019-11-19 22:53:18,767 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:53:18,782 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:53:18,782 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:53:18,782 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:29 [2019-11-19 22:53:18,902 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:53:18,903 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 56 [2019-11-19 22:53:18,903 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:53:18,948 INFO L567 ElimStorePlain]: treesize reduction 24, result has 60.0 percent of original size [2019-11-19 22:53:18,948 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:53:18,948 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:36 [2019-11-19 22:53:19,145 INFO L343 Elim1Store]: treesize reduction 10, result has 87.7 percent of original size [2019-11-19 22:53:19,146 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 98 [2019-11-19 22:53:19,147 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:53:19,214 INFO L567 ElimStorePlain]: treesize reduction 54, result has 47.1 percent of original size [2019-11-19 22:53:19,214 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:53:19,215 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:52, output treesize:48 [2019-11-19 22:53:19,467 INFO L343 Elim1Store]: treesize reduction 32, result has 56.2 percent of original size [2019-11-19 22:53:19,468 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 101 [2019-11-19 22:53:19,471 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:53:19,506 INFO L567 ElimStorePlain]: treesize reduction 58, result has 50.0 percent of original size [2019-11-19 22:53:19,507 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 22:53:19,507 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:79, output treesize:58 [2019-11-19 22:53:20,168 WARN L191 SmtUtils]: Spent 624.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2019-11-19 22:53:20,878 WARN L191 SmtUtils]: Spent 637.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2019-11-19 22:53:20,950 INFO L343 Elim1Store]: treesize reduction 32, result has 75.2 percent of original size [2019-11-19 22:53:20,950 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 84 treesize of output 171 [2019-11-19 22:53:20,952 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:53:20,998 INFO L567 ElimStorePlain]: treesize reduction 88, result has 42.5 percent of original size [2019-11-19 22:53:20,998 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-19 22:53:20,998 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:94, output treesize:65 [2019-11-19 22:53:23,770 WARN L191 SmtUtils]: Spent 2.73 s on a formula simplification that was a NOOP. DAG size: 40 [2019-11-19 22:53:27,860 WARN L191 SmtUtils]: Spent 4.04 s on a formula simplification that was a NOOP. DAG size: 46 [2019-11-19 22:53:27,991 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 69 [2019-11-19 22:53:27,992 INFO L343 Elim1Store]: treesize reduction 32, result has 84.1 percent of original size [2019-11-19 22:53:27,992 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 91 treesize of output 257 [2019-11-19 22:53:27,994 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:53:28,040 INFO L567 ElimStorePlain]: treesize reduction 112, result has 43.4 percent of original size [2019-11-19 22:53:28,041 INFO L496 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-11-19 22:53:28,041 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:101, output treesize:86 [2019-11-19 22:53:28,109 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:53:28,180 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:53:28,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:53:28,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2019-11-19 22:53:28,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608008417] [2019-11-19 22:53:28,181 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-19 22:53:28,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:53:28,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-19 22:53:28,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2019-11-19 22:53:28,183 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 33 states. [2019-11-19 22:53:31,992 WARN L191 SmtUtils]: Spent 3.48 s on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2019-11-19 22:53:32,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:53:32,419 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2019-11-19 22:53:32,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-19 22:53:32,421 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 24 [2019-11-19 22:53:32,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:53:32,422 INFO L225 Difference]: With dead ends: 56 [2019-11-19 22:53:32,422 INFO L226 Difference]: Without dead ends: 42 [2019-11-19 22:53:32,423 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=163, Invalid=1397, Unknown=0, NotChecked=0, Total=1560 [2019-11-19 22:53:32,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-19 22:53:32,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2019-11-19 22:53:32,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-19 22:53:32,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2019-11-19 22:53:32,432 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 24 [2019-11-19 22:53:32,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:53:32,432 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2019-11-19 22:53:32,432 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-19 22:53:32,433 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2019-11-19 22:53:32,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-19 22:53:32,434 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:53:32,434 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:53:32,637 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:53:32,637 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:53:32,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:53:32,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1049109732, now seen corresponding path program 1 times [2019-11-19 22:53:32,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:53:32,638 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059037705] [2019-11-19 22:53:32,638 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:53:32,648 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 22:53:32,651 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1606408715] [2019-11-19 22:53:32,651 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a91dab41-7999-4d9e-bdec-59f879816e69/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:53:32,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:53:32,711 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-19 22:53:32,713 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:53:32,720 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-19 22:53:32,721 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:53:32,725 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:53:32,725 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:53:32,725 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2019-11-19 22:53:32,751 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-11-19 22:53:32,752 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:53:32,757 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:53:32,758 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:53:32,758 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2019-11-19 22:53:32,788 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:53:32,789 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 47 [2019-11-19 22:53:32,789 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:53:32,802 INFO L567 ElimStorePlain]: treesize reduction 22, result has 43.6 percent of original size [2019-11-19 22:53:32,802 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:53:32,802 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:17 [2019-11-19 22:53:32,835 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:53:32,835 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 47 [2019-11-19 22:53:32,836 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:53:32,852 INFO L567 ElimStorePlain]: treesize reduction 28, result has 37.8 percent of original size [2019-11-19 22:53:32,852 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:53:32,853 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:13 [2019-11-19 22:53:32,890 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2019-11-19 22:53:32,891 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:53:32,892 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:53:32,893 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:53:32,893 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2019-11-19 22:53:32,905 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:53:32,905 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059037705] [2019-11-19 22:53:32,905 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 22:53:32,906 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606408715] [2019-11-19 22:53:32,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-19 22:53:32,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-11-19 22:53:32,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033634892] [2019-11-19 22:53:32,906 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-19 22:53:32,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:53:32,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-19 22:53:32,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-11-19 22:53:32,907 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand 11 states. [2019-11-19 22:53:33,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:53:33,091 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2019-11-19 22:53:33,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-19 22:53:33,091 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2019-11-19 22:53:33,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:53:33,092 INFO L225 Difference]: With dead ends: 47 [2019-11-19 22:53:33,092 INFO L226 Difference]: Without dead ends: 40 [2019-11-19 22:53:33,093 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2019-11-19 22:53:33,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-19 22:53:33,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2019-11-19 22:53:33,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-19 22:53:33,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2019-11-19 22:53:33,101 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 24 [2019-11-19 22:53:33,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:53:33,101 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2019-11-19 22:53:33,101 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-19 22:53:33,102 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2019-11-19 22:53:33,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-19 22:53:33,103 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:53:33,103 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:53:33,303 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:53:33,304 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:53:33,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:53:33,304 INFO L82 PathProgramCache]: Analyzing trace with hash -426309664, now seen corresponding path program 2 times [2019-11-19 22:53:33,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:53:33,305 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843723613] [2019-11-19 22:53:33,305 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:53:33,313 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 22:53:33,314 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2093161537] [2019-11-19 22:53:33,314 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a91dab41-7999-4d9e-bdec-59f879816e69/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:53:33,382 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-19 22:53:33,383 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:53:33,384 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-19 22:53:33,386 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:53:33,412 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-11-19 22:53:33,412 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:53:33,425 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:53:33,426 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:53:33,426 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2019-11-19 22:53:33,464 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:53:33,465 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2019-11-19 22:53:33,466 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:53:33,476 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:53:33,477 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 22:53:33,477 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:32 [2019-11-19 22:53:33,534 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:53:33,535 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:53:33,537 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:53:33,538 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:53:33,539 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 47 [2019-11-19 22:53:33,540 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:53:33,553 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:53:33,553 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 22:53:33,554 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:60, output treesize:30 [2019-11-19 22:53:33,610 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:53:33,611 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:53:33,612 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2019-11-19 22:53:33,612 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:53:33,629 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:53:33,630 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:53:33,630 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:3 [2019-11-19 22:53:33,649 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-19 22:53:33,650 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843723613] [2019-11-19 22:53:33,650 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 22:53:33,650 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093161537] [2019-11-19 22:53:33,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-19 22:53:33,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-11-19 22:53:33,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243212310] [2019-11-19 22:53:33,651 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-19 22:53:33,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:53:33,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-19 22:53:33,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2019-11-19 22:53:33,651 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 11 states. [2019-11-19 22:53:34,349 WARN L191 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2019-11-19 22:53:34,977 WARN L191 SmtUtils]: Spent 614.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2019-11-19 22:53:35,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:53:35,035 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2019-11-19 22:53:35,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-19 22:53:35,036 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2019-11-19 22:53:35,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:53:35,036 INFO L225 Difference]: With dead ends: 49 [2019-11-19 22:53:35,037 INFO L226 Difference]: Without dead ends: 39 [2019-11-19 22:53:35,037 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2019-11-19 22:53:35,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-19 22:53:35,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-11-19 22:53:35,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-19 22:53:35,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2019-11-19 22:53:35,046 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 24 [2019-11-19 22:53:35,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:53:35,047 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2019-11-19 22:53:35,047 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-19 22:53:35,047 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2019-11-19 22:53:35,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-19 22:53:35,048 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:53:35,048 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:53:35,254 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:53:35,254 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:53:35,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:53:35,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1700299324, now seen corresponding path program 8 times [2019-11-19 22:53:35,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:53:35,255 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609405986] [2019-11-19 22:53:35,255 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:53:35,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:53:35,369 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:53:35,369 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609405986] [2019-11-19 22:53:35,369 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189289673] [2019-11-19 22:53:35,369 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a91dab41-7999-4d9e-bdec-59f879816e69/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:53:35,422 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-19 22:53:35,422 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:53:35,423 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-19 22:53:35,425 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:53:35,533 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:53:35,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:53:35,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2019-11-19 22:53:35,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602049683] [2019-11-19 22:53:35,534 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-19 22:53:35,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:53:35,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-19 22:53:35,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-11-19 22:53:35,535 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 16 states. [2019-11-19 22:53:35,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:53:35,983 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2019-11-19 22:53:35,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-19 22:53:35,984 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 26 [2019-11-19 22:53:35,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:53:35,985 INFO L225 Difference]: With dead ends: 47 [2019-11-19 22:53:35,985 INFO L226 Difference]: Without dead ends: 43 [2019-11-19 22:53:35,985 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2019-11-19 22:53:35,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-19 22:53:35,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2019-11-19 22:53:35,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-19 22:53:35,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-11-19 22:53:35,999 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 26 [2019-11-19 22:53:36,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:53:36,000 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-11-19 22:53:36,000 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-19 22:53:36,000 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-11-19 22:53:36,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-19 22:53:36,001 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:53:36,001 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:53:36,207 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:53:36,208 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:53:36,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:53:36,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1307941697, now seen corresponding path program 9 times [2019-11-19 22:53:36,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:53:36,209 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033261199] [2019-11-19 22:53:36,209 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:53:36,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:53:36,346 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:53:36,347 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033261199] [2019-11-19 22:53:36,347 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846501304] [2019-11-19 22:53:36,347 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a91dab41-7999-4d9e-bdec-59f879816e69/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:53:36,421 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-19 22:53:36,421 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:53:36,422 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-19 22:53:36,424 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:53:36,511 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:53:36,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:53:36,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2019-11-19 22:53:36,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700940989] [2019-11-19 22:53:36,513 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-19 22:53:36,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:53:36,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-19 22:53:36,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-11-19 22:53:36,514 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 16 states. [2019-11-19 22:53:36,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:53:36,717 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2019-11-19 22:53:36,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-19 22:53:36,718 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 27 [2019-11-19 22:53:36,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:53:36,719 INFO L225 Difference]: With dead ends: 51 [2019-11-19 22:53:36,719 INFO L226 Difference]: Without dead ends: 33 [2019-11-19 22:53:36,720 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2019-11-19 22:53:36,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-19 22:53:36,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2019-11-19 22:53:36,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-19 22:53:36,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2019-11-19 22:53:36,727 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 27 [2019-11-19 22:53:36,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:53:36,727 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2019-11-19 22:53:36,727 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-19 22:53:36,727 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2019-11-19 22:53:36,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-19 22:53:36,728 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:53:36,729 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:53:36,929 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:53:36,930 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:53:36,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:53:36,930 INFO L82 PathProgramCache]: Analyzing trace with hash 311885347, now seen corresponding path program 10 times [2019-11-19 22:53:36,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:53:36,931 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356990789] [2019-11-19 22:53:36,931 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:53:36,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:53:38,119 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:53:38,119 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356990789] [2019-11-19 22:53:38,120 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987573995] [2019-11-19 22:53:38,120 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a91dab41-7999-4d9e-bdec-59f879816e69/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:53:38,192 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-19 22:53:38,192 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:53:38,194 WARN L253 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 49 conjunts are in the unsatisfiable core [2019-11-19 22:53:38,197 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:53:38,212 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-19 22:53:38,213 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:53:38,221 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:53:38,228 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-19 22:53:38,229 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-19 22:53:38,236 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:53:38,237 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:53:38,237 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:23, output treesize:15 [2019-11-19 22:53:38,279 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2019-11-19 22:53:38,279 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:53:38,287 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:53:38,288 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 22:53:38,288 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:26 [2019-11-19 22:53:38,343 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:53:38,343 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 72 [2019-11-19 22:53:38,344 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:53:38,369 INFO L567 ElimStorePlain]: treesize reduction 36, result has 50.7 percent of original size [2019-11-19 22:53:38,370 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-19 22:53:38,370 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:37 [2019-11-19 22:53:38,439 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:53:38,440 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 72 [2019-11-19 22:53:38,440 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:53:38,472 INFO L567 ElimStorePlain]: treesize reduction 36, result has 50.7 percent of original size [2019-11-19 22:53:38,473 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-19 22:53:38,473 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:37 [2019-11-19 22:53:38,525 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:53:38,525 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 72 [2019-11-19 22:53:38,526 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:53:38,550 INFO L567 ElimStorePlain]: treesize reduction 36, result has 50.7 percent of original size [2019-11-19 22:53:38,551 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-19 22:53:38,551 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:37 [2019-11-19 22:53:38,695 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:53:38,696 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 57 [2019-11-19 22:53:38,697 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:53:38,727 INFO L567 ElimStorePlain]: treesize reduction 24, result has 62.5 percent of original size [2019-11-19 22:53:38,727 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 22:53:38,727 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:65, output treesize:40 [2019-11-19 22:53:38,876 INFO L343 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2019-11-19 22:53:38,877 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 56 treesize of output 42 [2019-11-19 22:53:38,877 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:53:38,891 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:53:38,891 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:53:38,892 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:66, output treesize:47 [2019-11-19 22:53:39,062 INFO L343 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2019-11-19 22:53:39,062 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 74 treesize of output 59 [2019-11-19 22:53:39,063 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:53:39,077 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:53:39,077 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:53:39,078 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:84, output treesize:73 [2019-11-19 22:53:39,303 INFO L343 Elim1Store]: treesize reduction 32, result has 56.2 percent of original size [2019-11-19 22:53:39,304 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 84 treesize of output 104 [2019-11-19 22:53:39,305 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:53:39,357 INFO L567 ElimStorePlain]: treesize reduction 80, result has 50.3 percent of original size [2019-11-19 22:53:39,357 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-19 22:53:39,358 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:97, output treesize:81 [2019-11-19 22:53:39,598 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:53:39,651 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-19 22:53:39,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:53:39,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 38 [2019-11-19 22:53:39,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033372984] [2019-11-19 22:53:39,652 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-11-19 22:53:39,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:53:39,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-11-19 22:53:39,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1307, Unknown=0, NotChecked=0, Total=1406 [2019-11-19 22:53:39,654 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 38 states. [2019-11-19 22:53:43,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:53:43,038 INFO L93 Difference]: Finished difference Result 89 states and 103 transitions. [2019-11-19 22:53:43,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2019-11-19 22:53:43,039 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 29 [2019-11-19 22:53:43,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:53:43,039 INFO L225 Difference]: With dead ends: 89 [2019-11-19 22:53:43,040 INFO L226 Difference]: Without dead ends: 83 [2019-11-19 22:53:43,041 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 10 SyntacticMatches, 8 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1041 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=358, Invalid=4198, Unknown=0, NotChecked=0, Total=4556 [2019-11-19 22:53:43,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-19 22:53:43,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 55. [2019-11-19 22:53:43,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-19 22:53:43,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2019-11-19 22:53:43,053 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 29 [2019-11-19 22:53:43,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:53:43,053 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2019-11-19 22:53:43,053 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-11-19 22:53:43,053 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2019-11-19 22:53:43,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-19 22:53:43,054 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:53:43,054 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:53:43,257 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:53:43,258 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:53:43,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:53:43,258 INFO L82 PathProgramCache]: Analyzing trace with hash 369143649, now seen corresponding path program 3 times [2019-11-19 22:53:43,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:53:43,258 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124988901] [2019-11-19 22:53:43,258 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:53:43,265 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 22:53:43,265 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1769023108] [2019-11-19 22:53:43,265 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a91dab41-7999-4d9e-bdec-59f879816e69/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:53:43,341 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-19 22:53:43,341 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:53:43,343 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-19 22:53:43,344 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:53:43,399 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-11-19 22:53:43,399 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:53:43,414 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:53:43,414 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 22:53:43,415 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:23 [2019-11-19 22:53:43,478 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:53:43,490 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:53:43,490 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 51 [2019-11-19 22:53:43,491 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:53:43,519 INFO L567 ElimStorePlain]: treesize reduction 24, result has 52.0 percent of original size [2019-11-19 22:53:43,520 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 22:53:43,520 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:26 [2019-11-19 22:53:43,553 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:53:43,564 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:53:43,565 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 51 [2019-11-19 22:53:43,565 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:53:43,585 INFO L567 ElimStorePlain]: treesize reduction 24, result has 52.0 percent of original size [2019-11-19 22:53:43,585 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 22:53:43,586 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:26 [2019-11-19 22:53:43,630 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:53:43,636 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:53:43,636 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 51 [2019-11-19 22:53:43,637 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:53:43,666 INFO L567 ElimStorePlain]: treesize reduction 32, result has 44.8 percent of original size [2019-11-19 22:53:43,667 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 22:53:43,667 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:51, output treesize:21 [2019-11-19 22:53:43,735 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:53:43,735 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2019-11-19 22:53:43,736 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-11-19 22:53:43,754 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:53:43,754 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:53:43,756 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:53:43,756 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:32, output treesize:28 [2019-11-19 22:53:43,803 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:53:43,869 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 9 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:53:43,869 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124988901] [2019-11-19 22:53:43,869 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 22:53:43,869 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769023108] [2019-11-19 22:53:43,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-19 22:53:43,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-11-19 22:53:43,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254861013] [2019-11-19 22:53:43,870 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-19 22:53:43,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:53:43,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-19 22:53:43,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2019-11-19 22:53:43,871 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand 15 states. [2019-11-19 22:53:44,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:53:44,318 INFO L93 Difference]: Finished difference Result 69 states and 80 transitions. [2019-11-19 22:53:44,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-19 22:53:44,319 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 29 [2019-11-19 22:53:44,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:53:44,320 INFO L225 Difference]: With dead ends: 69 [2019-11-19 22:53:44,320 INFO L226 Difference]: Without dead ends: 65 [2019-11-19 22:53:44,321 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=153, Invalid=353, Unknown=0, NotChecked=0, Total=506 [2019-11-19 22:53:44,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-19 22:53:44,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 59. [2019-11-19 22:53:44,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-19 22:53:44,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2019-11-19 22:53:44,334 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 29 [2019-11-19 22:53:44,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:53:44,335 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2019-11-19 22:53:44,335 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-19 22:53:44,335 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2019-11-19 22:53:44,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-19 22:53:44,336 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:53:44,336 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:53:44,540 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:53:44,540 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:53:44,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:53:44,540 INFO L82 PathProgramCache]: Analyzing trace with hash -967978331, now seen corresponding path program 4 times [2019-11-19 22:53:44,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:53:44,541 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887989817] [2019-11-19 22:53:44,541 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:53:44,546 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 22:53:44,547 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1192070293] [2019-11-19 22:53:44,547 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a91dab41-7999-4d9e-bdec-59f879816e69/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:53:44,595 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-19 22:53:44,595 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:53:44,596 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-19 22:53:44,598 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:53:44,602 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-11-19 22:53:44,603 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:53:44,604 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:53:44,605 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:53:44,605 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-11-19 22:53:44,623 INFO L343 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2019-11-19 22:53:44,623 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2019-11-19 22:53:44,624 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:53:44,628 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:53:44,629 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:53:44,629 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:24 [2019-11-19 22:53:44,670 INFO L343 Elim1Store]: treesize reduction 96, result has 20.7 percent of original size [2019-11-19 22:53:44,671 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 40 treesize of output 42 [2019-11-19 22:53:44,671 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:53:44,678 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:53:44,679 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:53:44,679 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:36 [2019-11-19 22:53:44,744 INFO L343 Elim1Store]: treesize reduction 171, result has 17.8 percent of original size [2019-11-19 22:53:44,745 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 57 [2019-11-19 22:53:44,745 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:53:44,756 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:53:44,756 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:53:44,756 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:51 [2019-11-19 22:53:44,931 INFO L343 Elim1Store]: treesize reduction 105, result has 39.3 percent of original size [2019-11-19 22:53:44,931 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 59 treesize of output 83 [2019-11-19 22:53:44,932 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:53:44,955 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:53:44,956 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:53:44,956 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:53:44,957 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:53:44,957 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:53:44,960 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:53:44,961 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:53:44,962 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:53:44,964 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:53:44,965 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:53:44,966 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:53:44,966 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:53:44,969 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:53:44,973 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:53:44,974 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:53:44,975 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:53:44,978 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 6 xjuncts. [2019-11-19 22:53:44,979 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:67, output treesize:465 [2019-11-19 22:53:45,041 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-19 22:53:45,171 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:53:45,172 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887989817] [2019-11-19 22:53:45,172 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 22:53:45,172 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192070293] [2019-11-19 22:53:45,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-19 22:53:45,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-11-19 22:53:45,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635639449] [2019-11-19 22:53:45,173 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-19 22:53:45,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:53:45,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-19 22:53:45,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2019-11-19 22:53:45,174 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand 18 states. [2019-11-19 22:53:45,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:53:45,710 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2019-11-19 22:53:45,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-19 22:53:45,711 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 29 [2019-11-19 22:53:45,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:53:45,712 INFO L225 Difference]: With dead ends: 67 [2019-11-19 22:53:45,712 INFO L226 Difference]: Without dead ends: 63 [2019-11-19 22:53:45,713 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2019-11-19 22:53:45,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-11-19 22:53:45,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 50. [2019-11-19 22:53:45,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-19 22:53:45,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2019-11-19 22:53:45,735 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 29 [2019-11-19 22:53:45,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:53:45,736 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2019-11-19 22:53:45,736 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-19 22:53:45,736 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2019-11-19 22:53:45,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-19 22:53:45,739 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:53:45,739 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:53:45,943 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:53:45,943 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:53:45,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:53:45,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1393842980, now seen corresponding path program 11 times [2019-11-19 22:53:45,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:53:45,944 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828361179] [2019-11-19 22:53:45,944 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:53:45,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:53:46,102 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:53:46,102 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828361179] [2019-11-19 22:53:46,102 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429647964] [2019-11-19 22:53:46,102 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a91dab41-7999-4d9e-bdec-59f879816e69/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:53:46,168 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-19 22:53:46,168 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:53:46,169 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-19 22:53:46,171 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:53:46,288 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 35 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:53:46,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:53:46,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2019-11-19 22:53:46,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620067343] [2019-11-19 22:53:46,289 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-19 22:53:46,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:53:46,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-19 22:53:46,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2019-11-19 22:53:46,292 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand 19 states. [2019-11-19 22:53:46,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:53:46,532 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2019-11-19 22:53:46,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-19 22:53:46,532 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 32 [2019-11-19 22:53:46,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:53:46,533 INFO L225 Difference]: With dead ends: 73 [2019-11-19 22:53:46,533 INFO L226 Difference]: Without dead ends: 38 [2019-11-19 22:53:46,534 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2019-11-19 22:53:46,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-19 22:53:46,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2019-11-19 22:53:46,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-19 22:53:46,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2019-11-19 22:53:46,544 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 32 [2019-11-19 22:53:46,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:53:46,546 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2019-11-19 22:53:46,546 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-19 22:53:46,546 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2019-11-19 22:53:46,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-19 22:53:46,549 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:53:46,549 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:53:46,753 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:53:46,753 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:53:46,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:53:46,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1635696442, now seen corresponding path program 12 times [2019-11-19 22:53:46,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:53:46,754 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643808148] [2019-11-19 22:53:46,754 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:53:46,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:53:47,678 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:53:47,678 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643808148] [2019-11-19 22:53:47,678 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14884842] [2019-11-19 22:53:47,678 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a91dab41-7999-4d9e-bdec-59f879816e69/bin/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:53:47,739 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-11-19 22:53:47,739 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:53:47,740 WARN L253 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 56 conjunts are in the unsatisfiable core [2019-11-19 22:53:47,743 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:53:47,751 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-19 22:53:47,752 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:53:47,759 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:53:47,759 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:53:47,759 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2019-11-19 22:53:47,801 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:53:47,805 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2019-11-19 22:53:47,805 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:53:47,814 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:53:47,814 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:53:47,814 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:30 [2019-11-19 22:53:47,907 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:53:47,921 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:53:47,921 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 56 [2019-11-19 22:53:47,921 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:53:47,949 INFO L567 ElimStorePlain]: treesize reduction 24, result has 60.7 percent of original size [2019-11-19 22:53:47,950 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:53:47,950 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:37 [2019-11-19 22:53:48,114 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:53:48,162 INFO L343 Elim1Store]: treesize reduction 10, result has 87.7 percent of original size [2019-11-19 22:53:48,163 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 98 [2019-11-19 22:53:48,163 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:53:48,202 INFO L567 ElimStorePlain]: treesize reduction 54, result has 46.0 percent of original size [2019-11-19 22:53:48,202 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:53:48,202 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:46 [2019-11-19 22:53:48,310 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:53:48,378 INFO L343 Elim1Store]: treesize reduction 77, result has 51.9 percent of original size [2019-11-19 22:53:48,378 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 113 [2019-11-19 22:53:48,379 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:53:48,422 INFO L567 ElimStorePlain]: treesize reduction 54, result has 51.8 percent of original size [2019-11-19 22:53:48,423 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:53:48,423 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:62, output treesize:58 [2019-11-19 22:53:48,556 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:53:48,652 INFO L343 Elim1Store]: treesize reduction 66, result has 69.3 percent of original size [2019-11-19 22:53:48,653 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 182 [2019-11-19 22:53:48,653 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:53:48,714 INFO L567 ElimStorePlain]: treesize reduction 114, result has 37.0 percent of original size [2019-11-19 22:53:48,714 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:53:48,714 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:71, output treesize:67 [2019-11-19 22:53:49,044 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:53:49,101 INFO L343 Elim1Store]: treesize reduction 112, result has 38.1 percent of original size [2019-11-19 22:53:49,102 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 87 treesize of output 153 [2019-11-19 22:53:49,103 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:53:49,168 INFO L567 ElimStorePlain]: treesize reduction 16, result has 82.0 percent of original size [2019-11-19 22:53:49,168 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 22:53:49,168 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:98, output treesize:73 [2019-11-19 22:53:51,249 WARN L191 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 42 [2019-11-19 22:53:51,949 WARN L191 SmtUtils]: Spent 625.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2019-11-19 22:53:51,965 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:53:52,171 WARN L191 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 67 [2019-11-19 22:53:52,172 INFO L343 Elim1Store]: treesize reduction 112, result has 57.7 percent of original size [2019-11-19 22:53:52,172 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 98 treesize of output 251 [2019-11-19 22:53:52,174 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:53:52,301 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 47 [2019-11-19 22:53:52,302 INFO L567 ElimStorePlain]: treesize reduction 296, result has 24.1 percent of original size [2019-11-19 22:53:52,303 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-19 22:53:52,303 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:109, output treesize:94 [2019-11-19 22:53:53,618 WARN L191 SmtUtils]: Spent 1.17 s on a formula simplification that was a NOOP. DAG size: 50 [2019-11-19 22:53:54,645 WARN L191 SmtUtils]: Spent 947.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2019-11-19 22:53:54,656 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:53:54,899 WARN L191 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 99 [2019-11-19 22:53:54,899 INFO L343 Elim1Store]: treesize reduction 112, result has 69.3 percent of original size [2019-11-19 22:53:54,900 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 [2019-11-19 22:53:54,902 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:53:54,999 INFO L567 ElimStorePlain]: treesize reduction 360, result has 22.6 percent of original size [2019-11-19 22:53:55,000 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-11-19 22:53:55,000 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:130, output treesize:105 [2019-11-19 22:53:57,356 WARN L191 SmtUtils]: Spent 2.18 s on a formula simplification that was a NOOP. DAG size: 56 [2019-11-19 22:53:59,523 WARN L191 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 62 [2019-11-19 22:53:59,537 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:53:59,946 WARN L191 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 135 [2019-11-19 22:53:59,947 INFO L343 Elim1Store]: treesize reduction 112, result has 76.7 percent of original size [2019-11-19 22:53:59,947 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 130 treesize of output 497 [2019-11-19 22:53:59,952 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:54:00,116 WARN L191 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 57 [2019-11-19 22:54:00,116 INFO L567 ElimStorePlain]: treesize reduction 634, result has 16.5 percent of original size [2019-11-19 22:54:00,117 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-11-19 22:54:00,118 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:141, output treesize:125 [2019-11-19 22:54:02,835 WARN L191 SmtUtils]: Spent 2.61 s on a formula simplification that was a NOOP. DAG size: 61 [2019-11-19 22:54:04,660 WARN L191 SmtUtils]: Spent 1.69 s on a formula simplification that was a NOOP. DAG size: 67 [2019-11-19 22:54:04,677 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:54:05,377 WARN L191 SmtUtils]: Spent 696.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 175 [2019-11-19 22:54:05,377 INFO L343 Elim1Store]: treesize reduction 112, result has 81.7 percent of original size [2019-11-19 22:54:05,377 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 150 treesize of output 644 [2019-11-19 22:54:05,381 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:54:05,571 WARN L191 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 61 [2019-11-19 22:54:05,571 INFO L567 ElimStorePlain]: treesize reduction 530, result has 18.1 percent of original size [2019-11-19 22:54:05,572 INFO L496 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-2 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-11-19 22:54:05,572 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:161, output treesize:117 [2019-11-19 22:54:05,684 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:54:05,803 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:54:05,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:54:05,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 49 [2019-11-19 22:54:05,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522902045] [2019-11-19 22:54:05,804 INFO L442 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-11-19 22:54:05,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:54:05,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-11-19 22:54:05,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=2195, Unknown=0, NotChecked=0, Total=2352 [2019-11-19 22:54:05,806 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 49 states. [2019-11-19 22:54:08,323 WARN L191 SmtUtils]: Spent 1.83 s on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2019-11-19 22:54:09,828 WARN L191 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2019-11-19 22:54:14,357 WARN L191 SmtUtils]: Spent 4.40 s on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2019-11-19 22:54:20,334 WARN L191 SmtUtils]: Spent 5.86 s on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2019-11-19 22:54:20,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:54:20,758 INFO L93 Difference]: Finished difference Result 78 states and 90 transitions. [2019-11-19 22:54:20,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-19 22:54:20,758 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 34 [2019-11-19 22:54:20,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:54:20,759 INFO L225 Difference]: With dead ends: 78 [2019-11-19 22:54:20,759 INFO L226 Difference]: Without dead ends: 58 [2019-11-19 22:54:20,761 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 863 ImplicationChecksByTransitivity, 29.8s TimeCoverageRelationStatistics Valid=232, Invalid=3074, Unknown=0, NotChecked=0, Total=3306 [2019-11-19 22:54:20,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-19 22:54:20,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2019-11-19 22:54:20,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-19 22:54:20,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2019-11-19 22:54:20,772 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 34 [2019-11-19 22:54:20,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:54:20,773 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2019-11-19 22:54:20,773 INFO L463 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-11-19 22:54:20,773 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2019-11-19 22:54:20,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-19 22:54:20,774 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:54:20,774 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:54:20,977 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:54:20,978 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:54:20,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:54:20,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1692954744, now seen corresponding path program 5 times [2019-11-19 22:54:20,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:54:20,978 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461387280] [2019-11-19 22:54:20,978 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:54:20,985 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 22:54:20,985 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [157003903] [2019-11-19 22:54:20,985 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a91dab41-7999-4d9e-bdec-59f879816e69/bin/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:54:21,097 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-19 22:54:21,098 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:54:21,100 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 37 conjunts are in the unsatisfiable core [2019-11-19 22:54:21,102 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:54:21,114 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-19 22:54:21,114 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:54:21,120 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:54:21,120 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:54:21,120 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-11-19 22:54:21,178 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-11-19 22:54:21,178 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:54:21,186 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:54:21,186 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:54:21,186 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2019-11-19 22:54:21,237 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:54:21,238 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2019-11-19 22:54:21,239 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:54:21,246 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:54:21,247 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:54:21,247 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:20 [2019-11-19 22:54:21,268 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:54:21,269 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2019-11-19 22:54:21,269 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:54:21,277 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:54:21,277 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:54:21,277 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:20 [2019-11-19 22:54:21,305 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:54:21,305 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2019-11-19 22:54:21,306 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:54:21,313 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:54:21,314 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:54:21,314 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:20 [2019-11-19 22:54:21,337 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:54:21,338 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2019-11-19 22:54:21,338 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:54:21,346 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:54:21,346 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:54:21,346 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:16 [2019-11-19 22:54:21,389 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-11-19 22:54:21,389 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:54:21,391 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:54:21,392 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:54:21,392 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2019-11-19 22:54:21,416 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:54:21,416 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461387280] [2019-11-19 22:54:21,416 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 22:54:21,417 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157003903] [2019-11-19 22:54:21,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-19 22:54:21,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-11-19 22:54:21,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057821159] [2019-11-19 22:54:21,418 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-19 22:54:21,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:54:21,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-19 22:54:21,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2019-11-19 22:54:21,418 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 15 states. [2019-11-19 22:54:21,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:54:21,687 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2019-11-19 22:54:21,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-19 22:54:21,687 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2019-11-19 22:54:21,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:54:21,688 INFO L225 Difference]: With dead ends: 63 [2019-11-19 22:54:21,688 INFO L226 Difference]: Without dead ends: 56 [2019-11-19 22:54:21,688 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2019-11-19 22:54:21,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-19 22:54:21,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2019-11-19 22:54:21,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-19 22:54:21,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2019-11-19 22:54:21,698 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 34 [2019-11-19 22:54:21,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:54:21,698 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2019-11-19 22:54:21,698 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-19 22:54:21,698 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2019-11-19 22:54:21,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-19 22:54:21,699 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:54:21,699 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:54:21,901 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:54:21,901 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:54:21,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:54:21,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1979212484, now seen corresponding path program 6 times [2019-11-19 22:54:21,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:54:21,901 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276258164] [2019-11-19 22:54:21,901 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:54:21,907 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 22:54:21,908 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1969345137] [2019-11-19 22:54:21,908 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a91dab41-7999-4d9e-bdec-59f879816e69/bin/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:54:21,982 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-11-19 22:54:21,982 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:54:21,983 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-19 22:54:21,984 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:54:22,029 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-11-19 22:54:22,029 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:54:22,035 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:54:22,036 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:54:22,036 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:20 [2019-11-19 22:54:22,074 INFO L343 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2019-11-19 22:54:22,074 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2019-11-19 22:54:22,075 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:54:22,083 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:54:22,083 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:54:22,084 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2019-11-19 22:54:22,780 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:54:22,799 INFO L343 Elim1Store]: treesize reduction 17, result has 66.7 percent of original size [2019-11-19 22:54:22,799 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 49 treesize of output 83 [2019-11-19 22:54:22,800 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:54:22,824 INFO L567 ElimStorePlain]: treesize reduction 66, result has 37.7 percent of original size [2019-11-19 22:54:22,824 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 22:54:22,825 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:65, output treesize:40 [2019-11-19 22:54:22,860 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:54:22,892 INFO L343 Elim1Store]: treesize reduction 17, result has 66.7 percent of original size [2019-11-19 22:54:22,893 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 49 treesize of output 83 [2019-11-19 22:54:22,894 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:54:22,919 INFO L567 ElimStorePlain]: treesize reduction 57, result has 41.2 percent of original size [2019-11-19 22:54:22,920 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 22:54:22,920 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:65, output treesize:40 [2019-11-19 22:54:22,950 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:54:22,971 INFO L343 Elim1Store]: treesize reduction 17, result has 66.7 percent of original size [2019-11-19 22:54:22,971 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 49 treesize of output 83 [2019-11-19 22:54:22,972 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:54:22,997 INFO L567 ElimStorePlain]: treesize reduction 58, result has 40.8 percent of original size [2019-11-19 22:54:22,997 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 22:54:22,998 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:65, output treesize:35 [2019-11-19 22:54:23,063 INFO L343 Elim1Store]: treesize reduction 17, result has 66.7 percent of original size [2019-11-19 22:54:23,063 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 35 treesize of output 43 [2019-11-19 22:54:23,064 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:54:23,077 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:54:23,078 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:54:23,078 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:54:23,078 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:54:23,079 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:54:23,079 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:46, output treesize:74 [2019-11-19 22:54:23,125 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:54:23,169 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:54:23,169 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276258164] [2019-11-19 22:54:23,169 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 22:54:23,170 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969345137] [2019-11-19 22:54:23,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-19 22:54:23,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-11-19 22:54:23,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299166181] [2019-11-19 22:54:23,170 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-19 22:54:23,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:54:23,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-19 22:54:23,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2019-11-19 22:54:23,171 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand 19 states. [2019-11-19 22:54:25,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:54:25,872 INFO L93 Difference]: Finished difference Result 79 states and 87 transitions. [2019-11-19 22:54:25,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-19 22:54:25,876 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 34 [2019-11-19 22:54:25,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:54:25,877 INFO L225 Difference]: With dead ends: 79 [2019-11-19 22:54:25,877 INFO L226 Difference]: Without dead ends: 69 [2019-11-19 22:54:25,878 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=394, Invalid=1862, Unknown=0, NotChecked=0, Total=2256 [2019-11-19 22:54:25,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-11-19 22:54:25,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60. [2019-11-19 22:54:25,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-11-19 22:54:25,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2019-11-19 22:54:25,891 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 34 [2019-11-19 22:54:25,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:54:25,891 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2019-11-19 22:54:25,891 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-19 22:54:25,891 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2019-11-19 22:54:25,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-19 22:54:25,892 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:54:25,892 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:54:26,096 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:54:26,096 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:54:26,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:54:26,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1035254296, now seen corresponding path program 13 times [2019-11-19 22:54:26,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:54:26,097 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346574840] [2019-11-19 22:54:26,097 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:54:26,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:54:26,254 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 16 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:54:26,254 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346574840] [2019-11-19 22:54:26,254 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982484070] [2019-11-19 22:54:26,254 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a91dab41-7999-4d9e-bdec-59f879816e69/bin/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:54:26,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:54:26,295 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-19 22:54:26,296 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:54:26,451 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 25 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:54:26,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:54:26,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2019-11-19 22:54:26,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026470166] [2019-11-19 22:54:26,452 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-19 22:54:26,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:54:26,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-19 22:54:26,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2019-11-19 22:54:26,453 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand 22 states. [2019-11-19 22:54:27,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:54:27,016 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2019-11-19 22:54:27,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-19 22:54:27,018 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 36 [2019-11-19 22:54:27,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:54:27,019 INFO L225 Difference]: With dead ends: 68 [2019-11-19 22:54:27,019 INFO L226 Difference]: Without dead ends: 64 [2019-11-19 22:54:27,020 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=265, Invalid=857, Unknown=0, NotChecked=0, Total=1122 [2019-11-19 22:54:27,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-19 22:54:27,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2019-11-19 22:54:27,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-19 22:54:27,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2019-11-19 22:54:27,029 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 36 [2019-11-19 22:54:27,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:54:27,029 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2019-11-19 22:54:27,029 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-19 22:54:27,029 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2019-11-19 22:54:27,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-19 22:54:27,029 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:54:27,030 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:54:27,230 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:54:27,230 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:54:27,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:54:27,230 INFO L82 PathProgramCache]: Analyzing trace with hash -127223707, now seen corresponding path program 14 times [2019-11-19 22:54:27,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:54:27,231 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927096279] [2019-11-19 22:54:27,231 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:54:27,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:54:27,404 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 38 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:54:27,405 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927096279] [2019-11-19 22:54:27,405 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877044553] [2019-11-19 22:54:27,405 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a91dab41-7999-4d9e-bdec-59f879816e69/bin/uautomizer/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:54:27,464 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-19 22:54:27,464 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:54:27,465 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-19 22:54:27,466 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:54:27,567 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 51 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:54:27,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:54:27,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2019-11-19 22:54:27,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148808712] [2019-11-19 22:54:27,568 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-19 22:54:27,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:54:27,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-19 22:54:27,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2019-11-19 22:54:27,568 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand 22 states. [2019-11-19 22:54:27,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:54:27,782 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2019-11-19 22:54:27,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-19 22:54:27,782 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 37 [2019-11-19 22:54:27,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:54:27,783 INFO L225 Difference]: With dead ends: 69 [2019-11-19 22:54:27,783 INFO L226 Difference]: Without dead ends: 43 [2019-11-19 22:54:27,784 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2019-11-19 22:54:27,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-19 22:54:27,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2019-11-19 22:54:27,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-19 22:54:27,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2019-11-19 22:54:27,790 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 37 [2019-11-19 22:54:27,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:54:27,790 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2019-11-19 22:54:27,790 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-19 22:54:27,790 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2019-11-19 22:54:27,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-19 22:54:27,791 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:54:27,791 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:54:27,991 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:54:27,991 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:54:27,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:54:27,992 INFO L82 PathProgramCache]: Analyzing trace with hash 639592647, now seen corresponding path program 15 times [2019-11-19 22:54:27,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:54:27,992 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002067804] [2019-11-19 22:54:27,992 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:54:28,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:54:29,065 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:54:29,065 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002067804] [2019-11-19 22:54:29,065 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255585345] [2019-11-19 22:54:29,065 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a91dab41-7999-4d9e-bdec-59f879816e69/bin/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:54:29,139 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-11-19 22:54:29,139 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:54:29,141 WARN L253 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 64 conjunts are in the unsatisfiable core [2019-11-19 22:54:29,142 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:54:29,146 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-19 22:54:29,146 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:54:29,152 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:54:29,153 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:54:29,153 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:16 [2019-11-19 22:54:29,198 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:54:29,199 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2019-11-19 22:54:29,199 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:54:29,207 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:54:29,208 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 22:54:29,208 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:27 [2019-11-19 22:54:29,262 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:54:29,278 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:54:29,278 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 72 [2019-11-19 22:54:29,279 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:54:29,311 INFO L567 ElimStorePlain]: treesize reduction 36, result has 51.4 percent of original size [2019-11-19 22:54:29,311 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-19 22:54:29,312 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:38 [2019-11-19 22:54:29,371 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:54:29,387 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:54:29,388 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 72 [2019-11-19 22:54:29,388 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:54:29,423 INFO L567 ElimStorePlain]: treesize reduction 36, result has 51.4 percent of original size [2019-11-19 22:54:29,424 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-19 22:54:29,424 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:38 [2019-11-19 22:54:29,481 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:54:29,500 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:54:29,501 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 72 [2019-11-19 22:54:29,501 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:54:29,524 INFO L567 ElimStorePlain]: treesize reduction 36, result has 51.4 percent of original size [2019-11-19 22:54:29,524 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-19 22:54:29,525 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:38 [2019-11-19 22:54:29,571 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:54:29,581 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:54:29,581 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 72 [2019-11-19 22:54:29,581 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:54:29,604 INFO L567 ElimStorePlain]: treesize reduction 36, result has 51.4 percent of original size [2019-11-19 22:54:29,604 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-19 22:54:29,604 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:38 [2019-11-19 22:54:29,653 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:54:29,666 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:54:29,666 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 72 [2019-11-19 22:54:29,667 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:54:29,694 INFO L567 ElimStorePlain]: treesize reduction 36, result has 51.4 percent of original size [2019-11-19 22:54:29,695 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-19 22:54:29,695 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:38 [2019-11-19 22:54:29,903 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:54:29,909 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:54:29,909 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 57 [2019-11-19 22:54:29,909 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:54:29,921 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:54:29,921 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 22:54:29,922 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:41 [2019-11-19 22:54:30,115 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:54:30,120 INFO L343 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2019-11-19 22:54:30,120 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 56 treesize of output 42 [2019-11-19 22:54:30,120 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:54:30,146 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:54:30,146 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:54:30,146 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:67, output treesize:42 [2019-11-19 22:54:30,354 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:54:30,372 INFO L343 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2019-11-19 22:54:30,373 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 60 treesize of output 75 [2019-11-19 22:54:30,373 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:54:30,387 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:54:30,387 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:54:30,387 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:71, output treesize:46 [2019-11-19 22:54:30,601 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:54:30,630 INFO L343 Elim1Store]: treesize reduction 32, result has 56.2 percent of original size [2019-11-19 22:54:30,631 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 101 [2019-11-19 22:54:30,631 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:54:30,667 INFO L567 ElimStorePlain]: treesize reduction 40, result has 57.9 percent of original size [2019-11-19 22:54:30,668 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:54:30,668 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:80, output treesize:55 [2019-11-19 22:54:30,921 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:54:30,975 INFO L343 Elim1Store]: treesize reduction 49, result has 63.2 percent of original size [2019-11-19 22:54:30,976 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 81 treesize of output 159 [2019-11-19 22:54:30,977 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:54:31,038 INFO L567 ElimStorePlain]: treesize reduction 112, result has 40.7 percent of original size [2019-11-19 22:54:31,038 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:54:31,039 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:92, output treesize:77 [2019-11-19 22:54:31,329 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:54:31,385 INFO L343 Elim1Store]: treesize reduction 112, result has 38.1 percent of original size [2019-11-19 22:54:31,385 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 95 treesize of output 155 [2019-11-19 22:54:31,386 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:54:31,442 INFO L567 ElimStorePlain]: treesize reduction 120, result has 41.7 percent of original size [2019-11-19 22:54:31,443 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-19 22:54:31,443 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:109, output treesize:86 [2019-11-19 22:54:31,774 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:54:31,851 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 6 proven. 51 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-19 22:54:31,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:54:31,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 25] total 53 [2019-11-19 22:54:31,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807864478] [2019-11-19 22:54:31,852 INFO L442 AbstractCegarLoop]: Interpolant automaton has 53 states [2019-11-19 22:54:31,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:54:31,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2019-11-19 22:54:31,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=2624, Unknown=0, NotChecked=0, Total=2756 [2019-11-19 22:54:31,854 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 53 states. [2019-11-19 22:54:38,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:54:38,955 INFO L93 Difference]: Finished difference Result 115 states and 133 transitions. [2019-11-19 22:54:38,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2019-11-19 22:54:38,955 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 39 [2019-11-19 22:54:38,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:54:38,956 INFO L225 Difference]: With dead ends: 115 [2019-11-19 22:54:38,956 INFO L226 Difference]: Without dead ends: 109 [2019-11-19 22:54:38,959 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 12 SyntacticMatches, 10 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1926 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=439, Invalid=8117, Unknown=0, NotChecked=0, Total=8556 [2019-11-19 22:54:38,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-11-19 22:54:38,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 77. [2019-11-19 22:54:38,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-19 22:54:38,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 88 transitions. [2019-11-19 22:54:38,972 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 88 transitions. Word has length 39 [2019-11-19 22:54:38,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:54:38,972 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 88 transitions. [2019-11-19 22:54:38,972 INFO L463 AbstractCegarLoop]: Interpolant automaton has 53 states. [2019-11-19 22:54:38,972 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 88 transitions. [2019-11-19 22:54:38,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-19 22:54:38,973 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:54:38,973 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:54:39,175 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:54:39,176 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:54:39,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:54:39,176 INFO L82 PathProgramCache]: Analyzing trace with hash 696850949, now seen corresponding path program 7 times [2019-11-19 22:54:39,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:54:39,176 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244069915] [2019-11-19 22:54:39,176 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:54:39,183 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 22:54:39,184 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1544341463] [2019-11-19 22:54:39,184 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a91dab41-7999-4d9e-bdec-59f879816e69/bin/uautomizer/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:54:39,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:54:39,250 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 38 conjunts are in the unsatisfiable core [2019-11-19 22:54:39,252 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:54:39,256 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-19 22:54:39,257 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:54:39,262 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:54:39,262 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:54:39,263 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2019-11-19 22:54:39,344 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-11-19 22:54:39,345 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:54:39,350 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:54:39,350 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:54:39,351 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2019-11-19 22:54:39,392 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:54:39,392 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 47 [2019-11-19 22:54:39,392 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:54:39,412 INFO L567 ElimStorePlain]: treesize reduction 22, result has 43.6 percent of original size [2019-11-19 22:54:39,412 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:54:39,412 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:17 [2019-11-19 22:54:39,443 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:54:39,443 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 47 [2019-11-19 22:54:39,444 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:54:39,458 INFO L567 ElimStorePlain]: treesize reduction 22, result has 43.6 percent of original size [2019-11-19 22:54:39,458 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:54:39,458 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:17 [2019-11-19 22:54:39,481 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:54:39,482 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 47 [2019-11-19 22:54:39,482 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:54:39,493 INFO L567 ElimStorePlain]: treesize reduction 22, result has 43.6 percent of original size [2019-11-19 22:54:39,493 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:54:39,493 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:17 [2019-11-19 22:54:39,515 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:54:39,516 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 47 [2019-11-19 22:54:39,516 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:54:39,527 INFO L567 ElimStorePlain]: treesize reduction 28, result has 37.8 percent of original size [2019-11-19 22:54:39,528 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:54:39,528 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:17 [2019-11-19 22:54:39,564 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:54:39,564 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 47 [2019-11-19 22:54:39,565 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:54:39,576 INFO L567 ElimStorePlain]: treesize reduction 22, result has 43.6 percent of original size [2019-11-19 22:54:39,576 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:54:39,576 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:13 [2019-11-19 22:54:39,612 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2019-11-19 22:54:39,613 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:54:39,614 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:54:39,614 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:54:39,615 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2019-11-19 22:54:39,634 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 11 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:54:39,635 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244069915] [2019-11-19 22:54:39,635 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 22:54:39,635 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544341463] [2019-11-19 22:54:39,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-19 22:54:39,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2019-11-19 22:54:39,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636219018] [2019-11-19 22:54:39,636 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-19 22:54:39,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:54:39,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-19 22:54:39,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2019-11-19 22:54:39,637 INFO L87 Difference]: Start difference. First operand 77 states and 88 transitions. Second operand 17 states. [2019-11-19 22:54:39,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:54:39,953 INFO L93 Difference]: Finished difference Result 90 states and 104 transitions. [2019-11-19 22:54:39,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-19 22:54:39,954 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 39 [2019-11-19 22:54:39,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:54:39,954 INFO L225 Difference]: With dead ends: 90 [2019-11-19 22:54:39,954 INFO L226 Difference]: Without dead ends: 83 [2019-11-19 22:54:39,955 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2019-11-19 22:54:39,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-19 22:54:39,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2019-11-19 22:54:39,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-11-19 22:54:39,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2019-11-19 22:54:39,965 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 39 [2019-11-19 22:54:39,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:54:39,965 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2019-11-19 22:54:39,965 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-19 22:54:39,965 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2019-11-19 22:54:39,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-19 22:54:39,966 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:54:39,966 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:54:40,166 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:54:40,166 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:54:40,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:54:40,166 INFO L82 PathProgramCache]: Analyzing trace with hash 897758085, now seen corresponding path program 8 times [2019-11-19 22:54:40,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:54:40,167 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300597878] [2019-11-19 22:54:40,167 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:54:40,171 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 22:54:40,171 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1668964214] [2019-11-19 22:54:40,172 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a91dab41-7999-4d9e-bdec-59f879816e69/bin/uautomizer/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:54:40,218 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-19 22:54:40,218 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:54:40,220 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 35 conjunts are in the unsatisfiable core [2019-11-19 22:54:40,221 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:54:40,261 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-11-19 22:54:40,262 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:54:40,269 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:54:40,270 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:54:40,270 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2019-11-19 22:54:40,304 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:54:40,304 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2019-11-19 22:54:40,305 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:54:40,314 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:54:40,315 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:54:40,315 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2019-11-19 22:54:40,364 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:54:40,366 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:54:40,367 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:54:40,367 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 36 treesize of output 38 [2019-11-19 22:54:40,368 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:54:40,381 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:54:40,381 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-19 22:54:40,382 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:52, output treesize:48 [2019-11-19 22:54:41,010 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:54:41,011 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:54:41,012 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:54:41,013 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:54:41,014 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:54:41,015 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:54:41,016 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:54:41,017 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 61 [2019-11-19 22:54:41,018 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:54:41,034 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:54:41,035 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-19 22:54:41,035 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:76, output treesize:51 [2019-11-19 22:54:41,102 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:54:41,103 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:54:41,104 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:54:41,105 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:54:41,106 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:54:41,107 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:54:41,108 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:54:41,109 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 61 [2019-11-19 22:54:41,110 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:54:41,124 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:54:41,124 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-19 22:54:41,125 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:76, output treesize:51 [2019-11-19 22:54:41,184 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:54:41,185 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:54:41,186 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:54:41,187 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:54:41,188 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:54:41,189 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:54:41,190 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:54:41,191 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 61 [2019-11-19 22:54:41,192 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:54:41,208 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:54:41,208 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-19 22:54:41,208 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:76, output treesize:46 [2019-11-19 22:54:41,351 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:54:41,353 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:54:41,354 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:54:41,355 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:54:41,355 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 13 [2019-11-19 22:54:41,356 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:54:41,366 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:54:41,366 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:54:41,367 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:41, output treesize:3 [2019-11-19 22:54:41,412 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 30 proven. 50 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-19 22:54:41,412 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300597878] [2019-11-19 22:54:41,412 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 22:54:41,412 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668964214] [2019-11-19 22:54:41,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-19 22:54:41,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2019-11-19 22:54:41,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589880140] [2019-11-19 22:54:41,413 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-19 22:54:41,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:54:41,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-19 22:54:41,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=230, Unknown=1, NotChecked=0, Total=272 [2019-11-19 22:54:41,414 INFO L87 Difference]: Start difference. First operand 81 states and 91 transitions. Second operand 17 states. [2019-11-19 22:54:43,084 WARN L191 SmtUtils]: Spent 528.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2019-11-19 22:54:43,869 WARN L191 SmtUtils]: Spent 667.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2019-11-19 22:54:44,595 WARN L191 SmtUtils]: Spent 706.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2019-11-19 22:54:44,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:54:44,722 INFO L93 Difference]: Finished difference Result 94 states and 105 transitions. [2019-11-19 22:54:44,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-19 22:54:44,722 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 39 [2019-11-19 22:54:44,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:54:44,723 INFO L225 Difference]: With dead ends: 94 [2019-11-19 22:54:44,723 INFO L226 Difference]: Without dead ends: 81 [2019-11-19 22:54:44,723 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=73, Invalid=388, Unknown=1, NotChecked=0, Total=462 [2019-11-19 22:54:44,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-11-19 22:54:44,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2019-11-19 22:54:44,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-11-19 22:54:44,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2019-11-19 22:54:44,735 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 39 [2019-11-19 22:54:44,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:54:44,735 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2019-11-19 22:54:44,735 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-19 22:54:44,735 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2019-11-19 22:54:44,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-19 22:54:44,735 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:54:44,735 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:54:44,936 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:54:44,936 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:54:44,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:54:44,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1062294473, now seen corresponding path program 9 times [2019-11-19 22:54:44,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:54:44,936 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096517181] [2019-11-19 22:54:44,937 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:54:44,940 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 22:54:44,940 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [203338812] [2019-11-19 22:54:44,941 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a91dab41-7999-4d9e-bdec-59f879816e69/bin/uautomizer/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:54:45,032 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-11-19 22:54:45,032 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:54:45,033 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 35 conjunts are in the unsatisfiable core [2019-11-19 22:54:45,034 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:54:45,056 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-11-19 22:54:45,056 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:54:45,061 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:54:45,061 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:54:45,061 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2019-11-19 22:54:45,078 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:54:45,078 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2019-11-19 22:54:45,079 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:54:45,085 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:54:45,085 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:54:45,085 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:25 [2019-11-19 22:54:45,112 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:54:45,113 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:54:45,114 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:54:45,115 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:54:45,115 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 1 case distinctions, treesize of input 34 treesize of output 36 [2019-11-19 22:54:45,116 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:54:45,126 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:54:45,127 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-19 22:54:45,127 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:48, output treesize:44 [2019-11-19 22:54:45,146 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:54:45,147 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:54:45,148 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:54:45,177 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:54:45,178 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 146 [2019-11-19 22:54:45,178 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:54:45,222 INFO L567 ElimStorePlain]: treesize reduction 96, result has 36.4 percent of original size [2019-11-19 22:54:45,222 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-19 22:54:45,222 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:55 [2019-11-19 22:54:49,306 WARN L191 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 38 [2019-11-19 22:54:49,325 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:54:49,326 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:54:49,328 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:54:49,397 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:54:49,398 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 56 treesize of output 240 [2019-11-19 22:54:49,399 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:54:49,511 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2019-11-19 22:54:49,511 INFO L567 ElimStorePlain]: treesize reduction 132, result has 35.0 percent of original size [2019-11-19 22:54:49,512 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-11-19 22:54:49,512 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:75, output treesize:71 [2019-11-19 22:54:51,587 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:54:51,589 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:54:51,591 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:54:51,659 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:54:51,660 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 56 treesize of output 240 [2019-11-19 22:54:51,660 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:54:51,723 INFO L567 ElimStorePlain]: treesize reduction 132, result has 35.0 percent of original size [2019-11-19 22:54:51,724 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-11-19 22:54:51,724 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:75, output treesize:71 [2019-11-19 22:55:03,834 WARN L191 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 37 [2019-11-19 22:55:05,874 WARN L191 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 39 [2019-11-19 22:55:05,882 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:55:05,883 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:55:05,884 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:55:05,885 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:55:05,886 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:55:05,887 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:55:05,889 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:55:05,890 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 22:55:05,890 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-19 22:55:05,897 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:55:05,898 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 44 treesize of output 31 [2019-11-19 22:55:05,898 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:55:05,911 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:55:05,911 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:55:05,912 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:63, output treesize:10 [2019-11-19 22:55:05,935 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-11-19 22:55:05,935 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096517181] [2019-11-19 22:55:05,935 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 22:55:05,935 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203338812] [2019-11-19 22:55:05,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-19 22:55:05,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-11-19 22:55:05,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247149019] [2019-11-19 22:55:05,936 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-19 22:55:05,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:55:05,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-19 22:55:05,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=115, Unknown=5, NotChecked=0, Total=156 [2019-11-19 22:55:05,937 INFO L87 Difference]: Start difference. First operand 81 states and 88 transitions. Second operand 13 states. [2019-11-19 22:55:14,079 WARN L191 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 41 [2019-11-19 22:55:22,157 WARN L191 SmtUtils]: Spent 4.03 s on a formula simplification that was a NOOP. DAG size: 44 [2019-11-19 22:55:26,247 WARN L191 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2019-11-19 22:55:26,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:55:26,287 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2019-11-19 22:55:26,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-19 22:55:26,287 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2019-11-19 22:55:26,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:55:26,288 INFO L225 Difference]: With dead ends: 90 [2019-11-19 22:55:26,288 INFO L226 Difference]: Without dead ends: 48 [2019-11-19 22:55:26,288 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 38.5s TimeCoverageRelationStatistics Valid=69, Invalid=194, Unknown=9, NotChecked=0, Total=272 [2019-11-19 22:55:26,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-19 22:55:26,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2019-11-19 22:55:26,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-19 22:55:26,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2019-11-19 22:55:26,296 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 39 [2019-11-19 22:55:26,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:55:26,296 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2019-11-19 22:55:26,296 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-19 22:55:26,296 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2019-11-19 22:55:26,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-19 22:55:26,297 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:55:26,297 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:55:26,501 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:55:26,501 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:55:26,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:55:26,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1126332488, now seen corresponding path program 16 times [2019-11-19 22:55:26,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:55:26,502 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244095064] [2019-11-19 22:55:26,502 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:55:26,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:55:26,657 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 54 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:55:26,657 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244095064] [2019-11-19 22:55:26,657 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973164536] [2019-11-19 22:55:26,657 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a91dab41-7999-4d9e-bdec-59f879816e69/bin/uautomizer/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:55:26,720 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-19 22:55:26,720 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:55:26,721 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-19 22:55:26,722 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:55:26,863 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 70 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:55:26,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:55:26,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2019-11-19 22:55:26,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21367601] [2019-11-19 22:55:26,864 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-19 22:55:26,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:55:26,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-19 22:55:26,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2019-11-19 22:55:26,865 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 25 states. [2019-11-19 22:55:27,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:55:27,099 INFO L93 Difference]: Finished difference Result 75 states and 80 transitions. [2019-11-19 22:55:27,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-19 22:55:27,100 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 42 [2019-11-19 22:55:27,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:55:27,100 INFO L225 Difference]: With dead ends: 75 [2019-11-19 22:55:27,100 INFO L226 Difference]: Without dead ends: 48 [2019-11-19 22:55:27,101 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=247, Invalid=745, Unknown=0, NotChecked=0, Total=992 [2019-11-19 22:55:27,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-19 22:55:27,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2019-11-19 22:55:27,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-19 22:55:27,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2019-11-19 22:55:27,110 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 42 [2019-11-19 22:55:27,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:55:27,110 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2019-11-19 22:55:27,111 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-19 22:55:27,111 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2019-11-19 22:55:27,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-19 22:55:27,111 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:55:27,111 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:55:27,311 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:55:27,312 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:55:27,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:55:27,312 INFO L82 PathProgramCache]: Analyzing trace with hash -70138730, now seen corresponding path program 17 times [2019-11-19 22:55:27,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:55:27,313 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468096297] [2019-11-19 22:55:27,313 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:55:27,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:55:28,603 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:55:28,603 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468096297] [2019-11-19 22:55:28,603 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253909832] [2019-11-19 22:55:28,603 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a91dab41-7999-4d9e-bdec-59f879816e69/bin/uautomizer/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:55:28,729 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2019-11-19 22:55:28,729 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:55:28,731 WARN L253 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 73 conjunts are in the unsatisfiable core [2019-11-19 22:55:28,733 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:55:28,737 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-19 22:55:28,738 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:55:28,746 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:55:28,753 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-19 22:55:28,753 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-19 22:55:28,772 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:55:28,773 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:55:28,773 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2019-11-19 22:55:28,862 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2019-11-19 22:55:28,863 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:55:28,875 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:55:28,876 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:55:28,876 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:29 [2019-11-19 22:55:29,052 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:55:29,052 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 72 [2019-11-19 22:55:29,053 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:55:29,099 INFO L567 ElimStorePlain]: treesize reduction 36, result has 55.6 percent of original size [2019-11-19 22:55:29,100 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 22:55:29,100 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:45 [2019-11-19 22:55:29,361 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:55:29,361 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 138 [2019-11-19 22:55:29,362 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:55:29,442 INFO L567 ElimStorePlain]: treesize reduction 72, result has 45.9 percent of original size [2019-11-19 22:55:29,443 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-19 22:55:29,443 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:65, output treesize:61 [2019-11-19 22:55:29,810 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:55:29,810 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 220 [2019-11-19 22:55:29,811 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:55:29,905 INFO L567 ElimStorePlain]: treesize reduction 108, result has 41.6 percent of original size [2019-11-19 22:55:29,906 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-11-19 22:55:29,906 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:77 [2019-11-19 22:55:30,220 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:55:30,221 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 67 treesize of output 318 [2019-11-19 22:55:30,222 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:55:30,315 INFO L567 ElimStorePlain]: treesize reduction 144, result has 39.2 percent of original size [2019-11-19 22:55:30,316 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-11-19 22:55:30,316 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:97, output treesize:93 [2019-11-19 22:55:30,744 WARN L191 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2019-11-19 22:55:30,745 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:55:30,745 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 432 [2019-11-19 22:55:30,746 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:55:30,872 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 59 [2019-11-19 22:55:30,872 INFO L567 ElimStorePlain]: treesize reduction 180, result has 37.7 percent of original size [2019-11-19 22:55:30,873 INFO L496 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-11-19 22:55:30,873 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:113, output treesize:109 [2019-11-19 22:55:31,937 WARN L191 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2019-11-19 22:55:31,937 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:55:31,938 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 89 treesize of output 562 [2019-11-19 22:55:31,939 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:55:32,090 WARN L191 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 66 [2019-11-19 22:55:32,090 INFO L567 ElimStorePlain]: treesize reduction 216, result has 36.7 percent of original size [2019-11-19 22:55:32,091 INFO L496 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-11-19 22:55:32,091 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:129, output treesize:125 [2019-11-19 22:55:43,508 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2019-11-19 22:56:07,492 WARN L191 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2019-11-19 22:56:55,443 WARN L191 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2019-11-19 22:56:55,444 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:56:55,444 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 121 treesize of output 573 [2019-11-19 22:56:55,447 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:56:55,650 WARN L191 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 72 [2019-11-19 22:56:55,650 INFO L567 ElimStorePlain]: treesize reduction 576, result has 19.7 percent of original size [2019-11-19 22:56:55,651 INFO L496 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-2 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-11-19 22:56:55,651 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:166, output treesize:141 [2019-11-19 22:56:56,495 WARN L191 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2019-11-19 22:56:56,495 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:56:56,496 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 132 treesize of output 715 [2019-11-19 22:56:56,499 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:56:56,773 WARN L191 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 80 [2019-11-19 22:56:56,773 INFO L567 ElimStorePlain]: treesize reduction 672, result has 18.9 percent of original size [2019-11-19 22:56:56,774 INFO L496 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 1 dim-2 vars, End of recursive call: 8 dim-0 vars, and 1 xjuncts. [2019-11-19 22:56:56,774 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 9 variables, input treesize:182, output treesize:157 [2019-11-19 22:56:57,164 WARN L191 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2019-11-19 22:56:58,036 WARN L191 SmtUtils]: Spent 487.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2019-11-19 22:56:58,037 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:56:58,037 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 45 case distinctions, treesize of input 143 treesize of output 873 [2019-11-19 22:56:58,043 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:56:58,300 WARN L191 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 87 [2019-11-19 22:56:58,300 INFO L567 ElimStorePlain]: treesize reduction 600, result has 22.4 percent of original size [2019-11-19 22:56:58,301 INFO L496 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 1 dim-2 vars, End of recursive call: 9 dim-0 vars, and 1 xjuncts. [2019-11-19 22:56:58,301 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 10 variables, input treesize:198, output treesize:173 [2019-11-19 22:56:59,682 WARN L191 SmtUtils]: Spent 686.00 ms on a formula simplification that was a NOOP. DAG size: 267 [2019-11-19 22:56:59,682 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:56:59,683 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 1 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 55 case distinctions, treesize of input 154 treesize of output 1047 [2019-11-19 22:56:59,688 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:57:00,085 WARN L191 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 93 [2019-11-19 22:57:00,085 INFO L567 ElimStorePlain]: treesize reduction 864, result has 17.9 percent of original size [2019-11-19 22:57:00,087 INFO L496 ElimStorePlain]: Start of recursive call 1: 10 dim-0 vars, 1 dim-2 vars, End of recursive call: 10 dim-0 vars, and 1 xjuncts. [2019-11-19 22:57:00,087 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 11 variables, input treesize:214, output treesize:189 [2019-11-19 22:57:01,127 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2019-11-19 22:57:02,115 WARN L191 SmtUtils]: Spent 976.00 ms on a formula simplification that was a NOOP. DAG size: 315 [2019-11-19 22:57:02,116 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:57:02,116 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 1 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 66 case distinctions, treesize of input 165 treesize of output 1237 [2019-11-19 22:57:02,124 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:57:02,518 WARN L191 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 101 [2019-11-19 22:57:02,518 INFO L567 ElimStorePlain]: treesize reduction 960, result has 17.6 percent of original size [2019-11-19 22:57:02,519 INFO L496 ElimStorePlain]: Start of recursive call 1: 11 dim-0 vars, 1 dim-2 vars, End of recursive call: 11 dim-0 vars, and 1 xjuncts. [2019-11-19 22:57:02,519 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 12 variables, input treesize:230, output treesize:205 [2019-11-19 22:57:02,855 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2019-11-19 22:57:06,482 WARN L191 SmtUtils]: Spent 461.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2019-11-19 22:57:07,755 WARN L191 SmtUtils]: Spent 1.26 s on a formula simplification that was a NOOP. DAG size: 367 [2019-11-19 22:57:07,756 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:57:07,757 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 1 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 78 case distinctions, treesize of input 176 treesize of output 1443 [2019-11-19 22:57:07,765 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:57:08,350 WARN L191 SmtUtils]: Spent 584.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 109 [2019-11-19 22:57:08,351 INFO L567 ElimStorePlain]: treesize reduction 1680, result has 12.1 percent of original size [2019-11-19 22:57:08,352 INFO L496 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 1 dim-2 vars, End of recursive call: 12 dim-0 vars, and 1 xjuncts. [2019-11-19 22:57:08,352 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 13 variables, input treesize:246, output treesize:231 [2019-11-19 22:57:09,099 WARN L191 SmtUtils]: Spent 488.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2019-11-19 23:02:49,126 WARN L194 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2019-11-19 23:02:49,127 FATAL L310 FreeRefinementEngine]: Exception during interpolant generation: SMTLIBException [2019-11-19 23:02:49,327 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:02:49,328 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:225) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:153) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.managedscript.ManagedScript.checkSat(ManagedScript.java:140) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:84) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:934) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:773) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:345) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:305) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:576) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:440) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:201) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:291) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:177) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:297) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:180) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:463) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:333) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:123) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1461) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:654) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:205) ... 42 more [2019-11-19 23:02:49,332 INFO L168 Benchmark]: Toolchain (without parser) took 580703.33 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 368.6 MB). Free memory was 939.3 MB in the beginning and 785.3 MB in the end (delta: 154.0 MB). Peak memory consumption was 522.6 MB. Max. memory is 11.5 GB. [2019-11-19 23:02:49,333 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 1.0 GB. Free memory is still 966.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 23:02:49,333 INFO L168 Benchmark]: CACSL2BoogieTranslator took 381.22 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 128.5 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -183.2 MB). Peak memory consumption was 20.4 MB. Max. memory is 11.5 GB. [2019-11-19 23:02:49,333 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.68 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: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 11.5 GB. [2019-11-19 23:02:49,334 INFO L168 Benchmark]: Boogie Preprocessor took 31.03 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 23:02:49,334 INFO L168 Benchmark]: RCFGBuilder took 367.88 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: 20.8 MB). Peak memory consumption was 20.8 MB. Max. memory is 11.5 GB. [2019-11-19 23:02:49,334 INFO L168 Benchmark]: TraceAbstraction took 579874.72 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 240.1 MB). Free memory was 1.1 GB in the beginning and 785.3 MB in the end (delta: 312.8 MB). Peak memory consumption was 552.9 MB. Max. memory is 11.5 GB. [2019-11-19 23:02:49,336 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 1.0 GB. Free memory is still 966.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 381.22 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 128.5 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -183.2 MB). Peak memory consumption was 20.4 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 43.68 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: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 31.03 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 367.88 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: 20.8 MB). Peak memory consumption was 20.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 579874.72 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 240.1 MB). Free memory was 1.1 GB in the beginning and 785.3 MB in the end (delta: 312.8 MB). Peak memory consumption was 552.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.24-678e011 [2019-11-19 23:02:51,410 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-19 23:02:51,412 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-19 23:02:51,426 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-19 23:02:51,426 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-19 23:02:51,428 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-19 23:02:51,429 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-19 23:02:51,432 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-19 23:02:51,434 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-19 23:02:51,435 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-19 23:02:51,436 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-19 23:02:51,438 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-19 23:02:51,438 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-19 23:02:51,440 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-19 23:02:51,441 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-19 23:02:51,442 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-19 23:02:51,443 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-19 23:02:51,444 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-19 23:02:51,447 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-19 23:02:51,449 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-19 23:02:51,451 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-19 23:02:51,453 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-19 23:02:51,454 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-19 23:02:51,455 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-19 23:02:51,459 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-19 23:02:51,459 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-19 23:02:51,460 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-19 23:02:51,461 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-19 23:02:51,462 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-19 23:02:51,463 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-19 23:02:51,464 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-19 23:02:51,465 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-19 23:02:51,466 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-19 23:02:51,467 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-19 23:02:51,468 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-19 23:02:51,469 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-19 23:02:51,470 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-19 23:02:51,471 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-19 23:02:51,471 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-19 23:02:51,472 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-19 23:02:51,473 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-19 23:02:51,481 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a91dab41-7999-4d9e-bdec-59f879816e69/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2019-11-19 23:02:51,503 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-19 23:02:51,503 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-19 23:02:51,505 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-19 23:02:51,505 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-19 23:02:51,505 INFO L138 SettingsManager]: * Use SBE=true [2019-11-19 23:02:51,506 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-19 23:02:51,506 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-19 23:02:51,506 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-19 23:02:51,507 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-19 23:02:51,507 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-19 23:02:51,507 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-19 23:02:51,508 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-19 23:02:51,508 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-19 23:02:51,508 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-19 23:02:51,508 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-19 23:02:51,509 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-19 23:02:51,509 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-19 23:02:51,509 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-19 23:02:51,510 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-19 23:02:51,510 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-19 23:02:51,510 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-19 23:02:51,511 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-19 23:02:51,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-19 23:02:51,511 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-19 23:02:51,512 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-19 23:02:51,512 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-19 23:02:51,512 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-19 23:02:51,513 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-19 23:02:51,513 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-19 23:02:51,513 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-19 23:02:51,514 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_a91dab41-7999-4d9e-bdec-59f879816e69/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 -> 13fdc940912285336197da9ffc7154669004c425 [2019-11-19 23:02:51,897 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-19 23:02:51,924 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-19 23:02:51,929 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-19 23:02:51,932 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-19 23:02:51,933 INFO L275 PluginConnector]: CDTParser initialized [2019-11-19 23:02:51,934 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a91dab41-7999-4d9e-bdec-59f879816e69/bin/uautomizer/../../sv-benchmarks/c/array-fpi/s1if.c [2019-11-19 23:02:52,010 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a91dab41-7999-4d9e-bdec-59f879816e69/bin/uautomizer/data/0f719751c/1ba1ff7970ea490f9951e543e94fc393/FLAG4d18c20c8 [2019-11-19 23:02:52,495 INFO L306 CDTParser]: Found 1 translation units. [2019-11-19 23:02:52,496 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a91dab41-7999-4d9e-bdec-59f879816e69/sv-benchmarks/c/array-fpi/s1if.c [2019-11-19 23:02:52,503 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a91dab41-7999-4d9e-bdec-59f879816e69/bin/uautomizer/data/0f719751c/1ba1ff7970ea490f9951e543e94fc393/FLAG4d18c20c8 [2019-11-19 23:02:52,833 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a91dab41-7999-4d9e-bdec-59f879816e69/bin/uautomizer/data/0f719751c/1ba1ff7970ea490f9951e543e94fc393 [2019-11-19 23:02:52,839 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-19 23:02:52,841 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-19 23:02:52,842 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-19 23:02:52,843 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-19 23:02:52,847 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-19 23:02:52,848 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 11:02:52" (1/1) ... [2019-11-19 23:02:52,851 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57ba63b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:02:52, skipping insertion in model container [2019-11-19 23:02:52,852 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 11:02:52" (1/1) ... [2019-11-19 23:02:52,861 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-19 23:02:52,884 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-19 23:02:53,105 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 23:02:53,121 INFO L188 MainTranslator]: Completed pre-run [2019-11-19 23:02:53,166 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 23:02:53,185 INFO L192 MainTranslator]: Completed translation [2019-11-19 23:02:53,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:02:53 WrapperNode [2019-11-19 23:02:53,186 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-19 23:02:53,187 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-19 23:02:53,187 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-19 23:02:53,187 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-19 23:02:53,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:02:53" (1/1) ... [2019-11-19 23:02:53,317 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:02:53" (1/1) ... [2019-11-19 23:02:53,338 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-19 23:02:53,339 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-19 23:02:53,339 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-19 23:02:53,339 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-19 23:02:53,347 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:02:53" (1/1) ... [2019-11-19 23:02:53,348 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:02:53" (1/1) ... [2019-11-19 23:02:53,351 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:02:53" (1/1) ... [2019-11-19 23:02:53,352 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:02:53" (1/1) ... [2019-11-19 23:02:53,360 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:02:53" (1/1) ... [2019-11-19 23:02:53,365 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:02:53" (1/1) ... [2019-11-19 23:02:53,367 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:02:53" (1/1) ... [2019-11-19 23:02:53,370 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-19 23:02:53,371 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-19 23:02:53,371 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-19 23:02:53,371 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-19 23:02:53,372 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:02:53" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a91dab41-7999-4d9e-bdec-59f879816e69/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-19 23:02:53,438 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-19 23:02:53,438 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-19 23:02:53,439 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-19 23:02:53,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-19 23:02:53,439 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-19 23:02:53,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-19 23:02:53,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-19 23:02:53,753 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-19 23:02:53,754 INFO L285 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-19 23:02:53,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 11:02:53 BoogieIcfgContainer [2019-11-19 23:02:53,755 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-19 23:02:53,756 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-19 23:02:53,757 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-19 23:02:53,760 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-19 23:02:53,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 11:02:52" (1/3) ... [2019-11-19 23:02:53,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ce59b1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 11:02:53, skipping insertion in model container [2019-11-19 23:02:53,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:02:53" (2/3) ... [2019-11-19 23:02:53,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ce59b1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 11:02:53, skipping insertion in model container [2019-11-19 23:02:53,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 11:02:53" (3/3) ... [2019-11-19 23:02:53,764 INFO L109 eAbstractionObserver]: Analyzing ICFG s1if.c [2019-11-19 23:02:53,775 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-19 23:02:53,782 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-19 23:02:53,794 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-19 23:02:53,828 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-19 23:02:53,828 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-19 23:02:53,828 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-19 23:02:53,829 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-19 23:02:53,829 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-19 23:02:53,829 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-19 23:02:53,830 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-19 23:02:53,830 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-19 23:02:53,845 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-11-19 23:02:53,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-19 23:02:53,852 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:02:53,854 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:02:53,854 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:02:53,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:02:53,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1476218026, now seen corresponding path program 1 times [2019-11-19 23:02:53,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:02:53,874 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1652207018] [2019-11-19 23:02:53,875 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a91dab41-7999-4d9e-bdec-59f879816e69/bin/uautomizer/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:02:53,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:02:53,978 INFO L255 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-19 23:02:53,984 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:02:53,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:02:53,997 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:02:54,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:02:54,002 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1652207018] [2019-11-19 23:02:54,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:02:54,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-19 23:02:54,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385366460] [2019-11-19 23:02:54,010 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-19 23:02:54,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:02:54,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-19 23:02:54,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-19 23:02:54,029 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2019-11-19 23:02:54,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:02:54,048 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2019-11-19 23:02:54,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-19 23:02:54,050 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2019-11-19 23:02:54,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:02:54,061 INFO L225 Difference]: With dead ends: 29 [2019-11-19 23:02:54,061 INFO L226 Difference]: Without dead ends: 13 [2019-11-19 23:02:54,065 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-19 23:02:54,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-11-19 23:02:54,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-11-19 23:02:54,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-19 23:02:54,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2019-11-19 23:02:54,102 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 9 [2019-11-19 23:02:54,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:02:54,103 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2019-11-19 23:02:54,103 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-19 23:02:54,103 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2019-11-19 23:02:54,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-19 23:02:54,104 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:02:54,104 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:02:54,306 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:02:54,306 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:02:54,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:02:54,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1304115419, now seen corresponding path program 1 times [2019-11-19 23:02:54,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:02:54,308 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [18316298] [2019-11-19 23:02:54,308 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a91dab41-7999-4d9e-bdec-59f879816e69/bin/uautomizer/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:02:54,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:02:54,423 INFO L255 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-19 23:02:54,425 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:02:54,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:02:54,462 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:02:54,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:02:54,484 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [18316298] [2019-11-19 23:02:54,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:02:54,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-19 23:02:54,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143698833] [2019-11-19 23:02:54,488 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-19 23:02:54,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:02:54,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-19 23:02:54,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-19 23:02:54,490 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 4 states. [2019-11-19 23:02:54,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:02:54,607 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2019-11-19 23:02:54,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-19 23:02:54,608 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2019-11-19 23:02:54,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:02:54,609 INFO L225 Difference]: With dead ends: 23 [2019-11-19 23:02:54,609 INFO L226 Difference]: Without dead ends: 15 [2019-11-19 23:02:54,610 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-19 23:02:54,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-19 23:02:54,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2019-11-19 23:02:54,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-19 23:02:54,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2019-11-19 23:02:54,615 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9 [2019-11-19 23:02:54,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:02:54,615 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2019-11-19 23:02:54,616 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-19 23:02:54,616 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2019-11-19 23:02:54,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-19 23:02:54,617 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:02:54,617 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:02:54,817 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:02:54,818 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:02:54,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:02:54,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1358761923, now seen corresponding path program 1 times [2019-11-19 23:02:54,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:02:54,819 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1940324657] [2019-11-19 23:02:54,819 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a91dab41-7999-4d9e-bdec-59f879816e69/bin/uautomizer/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:02:54,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:02:54,923 INFO L255 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-19 23:02:54,925 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:02:55,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:02:55,032 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:02:55,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:02:55,173 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1940324657] [2019-11-19 23:02:55,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:02:55,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-11-19 23:02:55,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117337325] [2019-11-19 23:02:55,174 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-19 23:02:55,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:02:55,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-19 23:02:55,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-11-19 23:02:55,175 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 10 states. [2019-11-19 23:02:55,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:02:55,603 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2019-11-19 23:02:55,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-19 23:02:55,604 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 11 [2019-11-19 23:02:55,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:02:55,605 INFO L225 Difference]: With dead ends: 39 [2019-11-19 23:02:55,605 INFO L226 Difference]: Without dead ends: 32 [2019-11-19 23:02:55,606 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2019-11-19 23:02:55,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-19 23:02:55,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 22. [2019-11-19 23:02:55,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-19 23:02:55,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-11-19 23:02:55,618 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 11 [2019-11-19 23:02:55,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:02:55,619 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-11-19 23:02:55,619 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-19 23:02:55,619 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-11-19 23:02:55,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-19 23:02:55,620 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:02:55,620 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:02:55,822 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:02:55,823 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:02:55,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:02:55,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1565637502, now seen corresponding path program 1 times [2019-11-19 23:02:55,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:02:55,827 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [595872312] [2019-11-19 23:02:55,828 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a91dab41-7999-4d9e-bdec-59f879816e69/bin/uautomizer/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:02:55,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:02:55,953 INFO L255 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-19 23:02:55,955 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:02:56,002 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-19 23:02:56,003 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:02:56,022 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:02:56,034 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-19 23:02:56,035 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-19 23:02:56,061 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:02:56,061 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:02:56,062 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:27, output treesize:19 [2019-11-19 23:02:56,101 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2019-11-19 23:02:56,102 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:02:56,129 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:02:56,129 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:02:56,129 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:30 [2019-11-19 23:02:56,351 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:02:56,352 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 51 treesize of output 49 [2019-11-19 23:02:56,354 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:02:56,412 INFO L567 ElimStorePlain]: treesize reduction 16, result has 71.4 percent of original size [2019-11-19 23:02:56,415 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-11-19 23:02:56,415 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:63, output treesize:40 [2019-11-19 23:02:56,475 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:02:56,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:02:56,529 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:02:57,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:02:57,288 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [595872312] [2019-11-19 23:02:57,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:02:57,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2019-11-19 23:02:57,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063847591] [2019-11-19 23:02:57,289 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-19 23:02:57,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:02:57,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-19 23:02:57,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2019-11-19 23:02:57,290 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 16 states. [2019-11-19 23:02:59,672 WARN L191 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 37 DAG size of output: 23 [2019-11-19 23:03:01,831 WARN L191 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2019-11-19 23:03:02,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:03:02,216 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2019-11-19 23:03:02,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-19 23:03:02,216 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 14 [2019-11-19 23:03:02,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:03:02,217 INFO L225 Difference]: With dead ends: 31 [2019-11-19 23:03:02,218 INFO L226 Difference]: Without dead ends: 18 [2019-11-19 23:03:02,218 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2019-11-19 23:03:02,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-19 23:03:02,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2019-11-19 23:03:02,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-19 23:03:02,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2019-11-19 23:03:02,223 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2019-11-19 23:03:02,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:03:02,223 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2019-11-19 23:03:02,224 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-19 23:03:02,224 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2019-11-19 23:03:02,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-19 23:03:02,227 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:03:02,227 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:03:02,431 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:03:02,431 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:03:02,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:03:02,432 INFO L82 PathProgramCache]: Analyzing trace with hash -472130976, now seen corresponding path program 2 times [2019-11-19 23:03:02,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:03:02,432 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1288867805] [2019-11-19 23:03:02,433 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a91dab41-7999-4d9e-bdec-59f879816e69/bin/uautomizer/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:03:02,527 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-19 23:03:02,527 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 23:03:02,528 INFO L255 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-19 23:03:02,530 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:03:02,650 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:03:02,650 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:03:02,880 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:03:02,880 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1288867805] [2019-11-19 23:03:02,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:03:02,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2019-11-19 23:03:02,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517265855] [2019-11-19 23:03:02,882 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-19 23:03:02,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:03:02,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-19 23:03:02,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-11-19 23:03:02,883 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 16 states. [2019-11-19 23:03:03,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:03:03,296 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2019-11-19 23:03:03,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-19 23:03:03,305 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2019-11-19 23:03:03,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:03:03,306 INFO L225 Difference]: With dead ends: 42 [2019-11-19 23:03:03,306 INFO L226 Difference]: Without dead ends: 35 [2019-11-19 23:03:03,307 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2019-11-19 23:03:03,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-19 23:03:03,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2019-11-19 23:03:03,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-19 23:03:03,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2019-11-19 23:03:03,315 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 16 [2019-11-19 23:03:03,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:03:03,316 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2019-11-19 23:03:03,316 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-19 23:03:03,316 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2019-11-19 23:03:03,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-19 23:03:03,331 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:03:03,331 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:03:03,531 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:03:03,532 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:03:03,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:03:03,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1991965825, now seen corresponding path program 3 times [2019-11-19 23:03:03,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:03:03,533 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1990361726] [2019-11-19 23:03:03,533 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a91dab41-7999-4d9e-bdec-59f879816e69/bin/uautomizer/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:03:03,644 ERROR L271 FreeRefinementEngine]: Caught known exception: Array theory solver does not yet support write-chains connecting two different constant arrays [2019-11-19 23:03:03,644 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [565519894] [2019-11-19 23:03:03,644 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a91dab41-7999-4d9e-bdec-59f879816e69/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:03:03,723 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-19 23:03:03,723 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 23:03:03,726 INFO L255 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-19 23:03:03,728 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:03:03,802 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-19 23:03:03,803 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:03:03,829 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:03:03,836 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-19 23:03:03,836 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-19 23:03:03,921 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:03:03,922 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:03:03,922 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:30, output treesize:22 [2019-11-19 23:03:03,961 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2019-11-19 23:03:03,961 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:03:04,000 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:03:04,000 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:03:04,000 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:33 [2019-11-19 23:03:04,076 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:03:04,077 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 56 [2019-11-19 23:03:04,078 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:03:04,139 INFO L567 ElimStorePlain]: treesize reduction 28, result has 59.4 percent of original size [2019-11-19 23:03:04,140 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:03:04,140 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:41 [2019-11-19 23:03:04,421 INFO L343 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2019-11-19 23:03:04,421 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 62 treesize of output 77 [2019-11-19 23:03:04,423 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:03:04,500 INFO L567 ElimStorePlain]: treesize reduction 34, result has 60.5 percent of original size [2019-11-19 23:03:04,501 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 23:03:04,501 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:73, output treesize:52 [2019-11-19 23:03:04,730 INFO L343 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2019-11-19 23:03:04,731 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 62 treesize of output 77 [2019-11-19 23:03:04,732 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:03:04,830 INFO L567 ElimStorePlain]: treesize reduction 16, result has 75.8 percent of original size [2019-11-19 23:03:04,831 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-11-19 23:03:04,831 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:73, output treesize:50 [2019-11-19 23:03:04,947 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:03:05,020 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:03:05,020 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:03:14,981 WARN L191 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 48 [2019-11-19 23:03:14,996 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:03:14,997 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1990361726] [2019-11-19 23:03:14,997 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 23:03:14,997 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565519894] [2019-11-19 23:03:14,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:03:14,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2019-11-19 23:03:14,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442560164] [2019-11-19 23:03:14,999 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-19 23:03:14,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:03:14,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-19 23:03:15,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=469, Unknown=3, NotChecked=0, Total=552 [2019-11-19 23:03:15,000 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 24 states. [2019-11-19 23:03:17,797 WARN L191 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 58 DAG size of output: 29 [2019-11-19 23:03:20,106 WARN L191 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2019-11-19 23:03:26,796 WARN L191 SmtUtils]: Spent 4.31 s on a formula simplification. DAG size of input: 77 DAG size of output: 31 [2019-11-19 23:03:27,696 WARN L191 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 34 [2019-11-19 23:03:41,653 WARN L191 SmtUtils]: Spent 4.55 s on a formula simplification. DAG size of input: 110 DAG size of output: 69 [2019-11-19 23:03:49,043 WARN L191 SmtUtils]: Spent 5.29 s on a formula simplification. DAG size of input: 113 DAG size of output: 72 [2019-11-19 23:03:49,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:03:49,086 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2019-11-19 23:03:49,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-19 23:03:49,087 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 19 [2019-11-19 23:03:49,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:03:49,087 INFO L225 Difference]: With dead ends: 44 [2019-11-19 23:03:49,088 INFO L226 Difference]: Without dead ends: 31 [2019-11-19 23:03:49,089 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 32.3s TimeCoverageRelationStatistics Valid=159, Invalid=894, Unknown=3, NotChecked=0, Total=1056 [2019-11-19 23:03:49,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-19 23:03:49,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-11-19 23:03:49,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-19 23:03:49,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2019-11-19 23:03:49,095 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 19 [2019-11-19 23:03:49,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:03:49,095 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2019-11-19 23:03:49,095 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-19 23:03:49,096 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2019-11-19 23:03:49,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-19 23:03:49,096 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:03:49,097 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:03:49,297 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:03:49,297 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:03:49,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:03:49,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1934707523, now seen corresponding path program 1 times [2019-11-19 23:03:49,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:03:49,299 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1772800837] [2019-11-19 23:03:49,299 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a91dab41-7999-4d9e-bdec-59f879816e69/bin/uautomizer/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:03:49,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:03:49,487 INFO L255 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-19 23:03:49,489 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:03:49,505 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-19 23:03:49,506 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:03:49,512 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:03:49,512 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:03:49,512 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2019-11-19 23:03:49,543 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-11-19 23:03:49,543 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:03:49,552 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:03:49,552 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:03:49,553 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2019-11-19 23:03:49,669 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:03:49,670 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 48 treesize of output 52 [2019-11-19 23:03:49,671 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:03:49,687 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:03:49,688 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:03:49,688 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:55, output treesize:28 [2019-11-19 23:03:49,765 INFO L343 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2019-11-19 23:03:49,766 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 28 treesize of output 12 [2019-11-19 23:03:49,766 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:03:49,773 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:03:49,773 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:03:49,774 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:28, output treesize:5 [2019-11-19 23:03:49,814 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:03:49,814 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:03:52,479 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:03:52,480 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: incompatible size at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayIndexBasedCostEstimation.analyzeCosts(ArrayIndexBasedCostEstimation.java:211) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayIndexBasedCostEstimation.computeCostEstimation(ArrayIndexBasedCostEstimation.java:152) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayIndexBasedCostEstimation.(ArrayIndexBasedCostEstimation.java:64) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.computeCostEstimation(ElimStorePlain.java:519) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:390) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:216) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:306) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:102) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:246) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:440) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:419) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:291) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:334) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:177) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:242) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:166) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:463) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:333) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:123) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-11-19 23:03:52,487 INFO L168 Benchmark]: Toolchain (without parser) took 59644.12 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 217.1 MB). Free memory was 960.4 MB in the beginning and 855.2 MB in the end (delta: 105.2 MB). Peak memory consumption was 322.3 MB. Max. memory is 11.5 GB. [2019-11-19 23:03:52,490 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 1.0 GB. Free memory is still 987.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 23:03:52,493 INFO L168 Benchmark]: CACSL2BoogieTranslator took 344.00 ms. Allocated memory is still 1.0 GB. Free memory was 960.4 MB in the beginning and 949.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-19 23:03:52,497 INFO L168 Benchmark]: Boogie Procedure Inliner took 151.52 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 156.8 MB). Free memory was 949.7 MB in the beginning and 1.1 GB in the end (delta: -196.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2019-11-19 23:03:52,503 INFO L168 Benchmark]: Boogie Preprocessor took 31.60 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 23:03:52,503 INFO L168 Benchmark]: RCFGBuilder took 384.81 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: 25.4 MB). Peak memory consumption was 25.4 MB. Max. memory is 11.5 GB. [2019-11-19 23:03:52,504 INFO L168 Benchmark]: TraceAbstraction took 58726.69 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 60.3 MB). Free memory was 1.1 GB in the beginning and 855.2 MB in the end (delta: 265.9 MB). Peak memory consumption was 326.2 MB. Max. memory is 11.5 GB. [2019-11-19 23:03:52,507 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 1.0 GB. Free memory is still 987.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 344.00 ms. Allocated memory is still 1.0 GB. Free memory was 960.4 MB in the beginning and 949.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 151.52 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 156.8 MB). Free memory was 949.7 MB in the beginning and 1.1 GB in the end (delta: -196.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 31.60 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 384.81 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: 25.4 MB). Peak memory consumption was 25.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 58726.69 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 60.3 MB). Free memory was 1.1 GB in the beginning and 855.2 MB in the end (delta: 265.9 MB). Peak memory consumption was 326.2 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: incompatible size de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: incompatible size: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayIndexBasedCostEstimation.analyzeCosts(ArrayIndexBasedCostEstimation.java:211) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...