./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench/lcm2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_1c761771-9fdc-4afd-83e8-948afe72066d/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_1c761771-9fdc-4afd-83e8-948afe72066d/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_1c761771-9fdc-4afd-83e8-948afe72066d/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_1c761771-9fdc-4afd-83e8-948afe72066d/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench/lcm2.c -s /tmp/vcloud-vcloud-master/worker/working_dir_1c761771-9fdc-4afd-83e8-948afe72066d/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_1c761771-9fdc-4afd-83e8-948afe72066d/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 31995b8feb5bc29331db98d64734b4261081e594 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-10-22 09:01:07,090 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 09:01:07,091 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 09:01:07,100 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 09:01:07,100 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 09:01:07,101 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 09:01:07,102 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 09:01:07,103 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 09:01:07,104 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 09:01:07,105 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 09:01:07,106 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 09:01:07,107 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 09:01:07,107 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 09:01:07,108 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 09:01:07,109 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 09:01:07,110 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 09:01:07,110 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 09:01:07,111 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 09:01:07,112 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 09:01:07,114 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 09:01:07,115 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 09:01:07,115 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 09:01:07,116 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 09:01:07,117 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 09:01:07,119 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 09:01:07,119 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 09:01:07,119 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 09:01:07,120 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 09:01:07,120 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 09:01:07,121 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 09:01:07,121 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 09:01:07,122 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 09:01:07,122 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 09:01:07,123 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 09:01:07,124 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 09:01:07,124 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 09:01:07,124 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 09:01:07,124 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 09:01:07,124 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 09:01:07,125 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 09:01:07,126 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 09:01:07,127 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_1c761771-9fdc-4afd-83e8-948afe72066d/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-22 09:01:07,137 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 09:01:07,137 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 09:01:07,138 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 09:01:07,138 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 09:01:07,139 INFO L138 SettingsManager]: * Use SBE=true [2019-10-22 09:01:07,139 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 09:01:07,139 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 09:01:07,139 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 09:01:07,139 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 09:01:07,140 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 09:01:07,140 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 09:01:07,140 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 09:01:07,140 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 09:01:07,140 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 09:01:07,140 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 09:01:07,140 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 09:01:07,141 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 09:01:07,141 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 09:01:07,141 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 09:01:07,141 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 09:01:07,141 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 09:01:07,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 09:01:07,142 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 09:01:07,142 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 09:01:07,142 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 09:01:07,142 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-22 09:01:07,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 09:01:07,143 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 09:01:07,143 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/working_dir_1c761771-9fdc-4afd-83e8-948afe72066d/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 -> 31995b8feb5bc29331db98d64734b4261081e594 [2019-10-22 09:01:07,183 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 09:01:07,196 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 09:01:07,199 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 09:01:07,201 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 09:01:07,201 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 09:01:07,202 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_1c761771-9fdc-4afd-83e8-948afe72066d/bin/uautomizer/../../sv-benchmarks/c/nla-digbench/lcm2.c [2019-10-22 09:01:07,246 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_1c761771-9fdc-4afd-83e8-948afe72066d/bin/uautomizer/data/d0ca70acf/094d2510f86543caabb443b7c5824f69/FLAG1e3fcabd1 [2019-10-22 09:01:07,627 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 09:01:07,628 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_1c761771-9fdc-4afd-83e8-948afe72066d/sv-benchmarks/c/nla-digbench/lcm2.c [2019-10-22 09:01:07,633 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_1c761771-9fdc-4afd-83e8-948afe72066d/bin/uautomizer/data/d0ca70acf/094d2510f86543caabb443b7c5824f69/FLAG1e3fcabd1 [2019-10-22 09:01:08,050 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_1c761771-9fdc-4afd-83e8-948afe72066d/bin/uautomizer/data/d0ca70acf/094d2510f86543caabb443b7c5824f69 [2019-10-22 09:01:08,053 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 09:01:08,054 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 09:01:08,055 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 09:01:08,055 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 09:01:08,058 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 09:01:08,059 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:01:08" (1/1) ... [2019-10-22 09:01:08,061 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ab4a884 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:08, skipping insertion in model container [2019-10-22 09:01:08,061 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:01:08" (1/1) ... [2019-10-22 09:01:08,068 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 09:01:08,086 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 09:01:08,254 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 09:01:08,258 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 09:01:08,359 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 09:01:08,371 INFO L192 MainTranslator]: Completed translation [2019-10-22 09:01:08,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:08 WrapperNode [2019-10-22 09:01:08,371 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 09:01:08,372 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 09:01:08,372 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 09:01:08,372 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 09:01:08,380 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:08" (1/1) ... [2019-10-22 09:01:08,386 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:08" (1/1) ... [2019-10-22 09:01:08,406 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 09:01:08,406 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 09:01:08,406 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 09:01:08,406 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 09:01:08,416 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:08" (1/1) ... [2019-10-22 09:01:08,416 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:08" (1/1) ... [2019-10-22 09:01:08,417 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:08" (1/1) ... [2019-10-22 09:01:08,417 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:08" (1/1) ... [2019-10-22 09:01:08,420 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:08" (1/1) ... [2019-10-22 09:01:08,424 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:08" (1/1) ... [2019-10-22 09:01:08,425 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:08" (1/1) ... [2019-10-22 09:01:08,427 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 09:01:08,427 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 09:01:08,428 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 09:01:08,428 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 09:01:08,429 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:08" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1c761771-9fdc-4afd-83e8-948afe72066d/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 [2019-10-22 09:01:08,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 09:01:08,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 09:01:08,690 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 09:01:08,690 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-10-22 09:01:08,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:01:08 BoogieIcfgContainer [2019-10-22 09:01:08,691 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 09:01:08,692 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 09:01:08,692 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 09:01:08,695 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 09:01:08,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 09:01:08" (1/3) ... [2019-10-22 09:01:08,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34a1138e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 09:01:08, skipping insertion in model container [2019-10-22 09:01:08,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:08" (2/3) ... [2019-10-22 09:01:08,697 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34a1138e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 09:01:08, skipping insertion in model container [2019-10-22 09:01:08,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:01:08" (3/3) ... [2019-10-22 09:01:08,699 INFO L109 eAbstractionObserver]: Analyzing ICFG lcm2.c [2019-10-22 09:01:08,708 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 09:01:08,714 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-10-22 09:01:08,724 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-10-22 09:01:08,746 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 09:01:08,746 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 09:01:08,747 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 09:01:08,747 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 09:01:08,747 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 09:01:08,747 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 09:01:08,747 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 09:01:08,747 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 09:01:08,758 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-10-22 09:01:08,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-10-22 09:01:08,764 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:08,765 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-10-22 09:01:08,766 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:08,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:08,772 INFO L82 PathProgramCache]: Analyzing trace with hash 963340, now seen corresponding path program 1 times [2019-10-22 09:01:08,780 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:08,781 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216278834] [2019-10-22 09:01:08,781 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:08,781 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:08,781 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:08,853 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-22 09:01:08,854 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1290715887] [2019-10-22 09:01:08,854 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1c761771-9fdc-4afd-83e8-948afe72066d/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 [2019-10-22 09:01:08,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:08,884 WARN L254 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-22 09:01:08,888 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:08,956 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:08,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:08,999 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216278834] [2019-10-22 09:01:08,999 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-22 09:01:08,999 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290715887] [2019-10-22 09:01:09,000 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:01:09,000 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-22 09:01:09,000 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183600167] [2019-10-22 09:01:09,004 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 09:01:09,004 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:09,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 09:01:09,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-22 09:01:09,015 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 4 states. [2019-10-22 09:01:09,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:09,097 INFO L93 Difference]: Finished difference Result 40 states and 57 transitions. [2019-10-22 09:01:09,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 09:01:09,099 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-10-22 09:01:09,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:09,107 INFO L225 Difference]: With dead ends: 40 [2019-10-22 09:01:09,107 INFO L226 Difference]: Without dead ends: 16 [2019-10-22 09:01:09,110 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-22 09:01:09,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-10-22 09:01:09,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2019-10-22 09:01:09,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-10-22 09:01:09,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-10-22 09:01:09,138 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 4 [2019-10-22 09:01:09,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:09,138 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-10-22 09:01:09,138 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 09:01:09,138 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-10-22 09:01:09,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-10-22 09:01:09,139 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:09,139 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:09,340 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:09,340 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:09,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:09,340 INFO L82 PathProgramCache]: Analyzing trace with hash 759715009, now seen corresponding path program 1 times [2019-10-22 09:01:09,341 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:09,341 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310709339] [2019-10-22 09:01:09,341 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:09,341 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:09,341 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:09,348 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-22 09:01:09,348 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [440607168] [2019-10-22 09:01:09,348 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1c761771-9fdc-4afd-83e8-948afe72066d/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 [2019-10-22 09:01:09,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:09,384 WARN L254 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-22 09:01:09,388 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:09,433 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:09,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:09,446 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310709339] [2019-10-22 09:01:09,446 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-22 09:01:09,446 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440607168] [2019-10-22 09:01:09,446 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-22 09:01:09,446 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-10-22 09:01:09,447 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393253829] [2019-10-22 09:01:09,448 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 09:01:09,448 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:09,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 09:01:09,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-22 09:01:09,449 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2019-10-22 09:01:09,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:09,550 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2019-10-22 09:01:09,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 09:01:09,552 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2019-10-22 09:01:09,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:09,553 INFO L225 Difference]: With dead ends: 26 [2019-10-22 09:01:09,553 INFO L226 Difference]: Without dead ends: 20 [2019-10-22 09:01:09,554 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-22 09:01:09,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-22 09:01:09,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2019-10-22 09:01:09,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-10-22 09:01:09,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2019-10-22 09:01:09,561 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 8 [2019-10-22 09:01:09,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:09,563 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2019-10-22 09:01:09,564 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 09:01:09,565 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2019-10-22 09:01:09,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-10-22 09:01:09,565 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:09,565 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:09,766 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:09,766 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:09,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:09,767 INFO L82 PathProgramCache]: Analyzing trace with hash 759774591, now seen corresponding path program 1 times [2019-10-22 09:01:09,767 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:09,767 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601895177] [2019-10-22 09:01:09,767 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:09,767 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:09,767 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:09,773 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-22 09:01:09,773 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [758540139] [2019-10-22 09:01:09,773 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1c761771-9fdc-4afd-83e8-948afe72066d/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 [2019-10-22 09:01:09,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:09,800 WARN L254 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-22 09:01:09,801 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:09,832 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:09,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:09,843 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601895177] [2019-10-22 09:01:09,843 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-22 09:01:09,843 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758540139] [2019-10-22 09:01:09,843 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-22 09:01:09,843 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-10-22 09:01:09,844 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784791350] [2019-10-22 09:01:09,844 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 09:01:09,844 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:09,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 09:01:09,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-22 09:01:09,845 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 5 states. [2019-10-22 09:01:09,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:09,932 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2019-10-22 09:01:09,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 09:01:09,932 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2019-10-22 09:01:09,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:09,933 INFO L225 Difference]: With dead ends: 29 [2019-10-22 09:01:09,933 INFO L226 Difference]: Without dead ends: 23 [2019-10-22 09:01:09,933 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-22 09:01:09,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-22 09:01:09,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2019-10-22 09:01:09,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-10-22 09:01:09,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2019-10-22 09:01:09,937 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 8 [2019-10-22 09:01:09,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:09,938 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2019-10-22 09:01:09,938 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 09:01:09,938 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2019-10-22 09:01:09,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-22 09:01:09,938 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:09,939 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1] [2019-10-22 09:01:10,139 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:10,139 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:10,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:10,140 INFO L82 PathProgramCache]: Analyzing trace with hash -54520842, now seen corresponding path program 2 times [2019-10-22 09:01:10,140 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:10,140 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19651608] [2019-10-22 09:01:10,140 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:10,140 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:10,140 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:10,149 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-22 09:01:10,152 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [615557284] [2019-10-22 09:01:10,152 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1c761771-9fdc-4afd-83e8-948afe72066d/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 [2019-10-22 09:01:10,177 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 09:01:10,177 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:10,178 WARN L254 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-22 09:01:10,179 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:10,259 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:10,284 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:10,284 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19651608] [2019-10-22 09:01:10,284 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-22 09:01:10,285 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615557284] [2019-10-22 09:01:10,285 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-22 09:01:10,285 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-22 09:01:10,285 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688060374] [2019-10-22 09:01:10,285 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-22 09:01:10,286 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:10,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 09:01:10,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-22 09:01:10,286 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 6 states. [2019-10-22 09:01:10,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:10,433 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2019-10-22 09:01:10,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-22 09:01:10,436 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2019-10-22 09:01:10,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:10,436 INFO L225 Difference]: With dead ends: 33 [2019-10-22 09:01:10,436 INFO L226 Difference]: Without dead ends: 27 [2019-10-22 09:01:10,437 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-10-22 09:01:10,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-22 09:01:10,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2019-10-22 09:01:10,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-22 09:01:10,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2019-10-22 09:01:10,445 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 12 [2019-10-22 09:01:10,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:10,446 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2019-10-22 09:01:10,447 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-22 09:01:10,447 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2019-10-22 09:01:10,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-22 09:01:10,447 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:10,447 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2019-10-22 09:01:10,648 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:10,649 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:10,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:10,649 INFO L82 PathProgramCache]: Analyzing trace with hash -54461260, now seen corresponding path program 1 times [2019-10-22 09:01:10,649 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:10,649 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654064709] [2019-10-22 09:01:10,650 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:10,650 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:10,650 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:10,655 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-22 09:01:10,655 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1470399426] [2019-10-22 09:01:10,656 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1c761771-9fdc-4afd-83e8-948afe72066d/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 [2019-10-22 09:01:10,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:10,696 INFO L256 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-22 09:01:10,697 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:10,773 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:10,787 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:10,787 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654064709] [2019-10-22 09:01:10,787 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-22 09:01:10,787 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470399426] [2019-10-22 09:01:10,788 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-22 09:01:10,788 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-22 09:01:10,788 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291578062] [2019-10-22 09:01:10,788 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-22 09:01:10,788 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:10,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 09:01:10,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-22 09:01:10,790 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 6 states. [2019-10-22 09:01:10,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:10,912 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2019-10-22 09:01:10,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-22 09:01:10,912 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2019-10-22 09:01:10,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:10,913 INFO L225 Difference]: With dead ends: 33 [2019-10-22 09:01:10,913 INFO L226 Difference]: Without dead ends: 27 [2019-10-22 09:01:10,913 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-10-22 09:01:10,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-22 09:01:10,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2019-10-22 09:01:10,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-22 09:01:10,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2019-10-22 09:01:10,919 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 12 [2019-10-22 09:01:10,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:10,919 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2019-10-22 09:01:10,919 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-22 09:01:10,919 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2019-10-22 09:01:10,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-22 09:01:10,920 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:10,920 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2019-10-22 09:01:11,120 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:11,121 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:11,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:11,121 INFO L82 PathProgramCache]: Analyzing trace with hash -863867468, now seen corresponding path program 2 times [2019-10-22 09:01:11,122 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:11,122 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708075978] [2019-10-22 09:01:11,122 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:11,122 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:11,122 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:11,127 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-22 09:01:11,128 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [541164362] [2019-10-22 09:01:11,128 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1c761771-9fdc-4afd-83e8-948afe72066d/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 [2019-10-22 09:01:11,151 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 09:01:11,151 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:11,152 INFO L256 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-22 09:01:11,153 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:11,197 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:11,209 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:11,209 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708075978] [2019-10-22 09:01:11,209 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-22 09:01:11,209 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541164362] [2019-10-22 09:01:11,210 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-22 09:01:11,210 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-22 09:01:11,210 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901795677] [2019-10-22 09:01:11,210 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-22 09:01:11,211 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:11,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 09:01:11,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-22 09:01:11,211 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 6 states. [2019-10-22 09:01:11,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:11,355 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2019-10-22 09:01:11,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-22 09:01:11,355 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2019-10-22 09:01:11,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:11,356 INFO L225 Difference]: With dead ends: 37 [2019-10-22 09:01:11,356 INFO L226 Difference]: Without dead ends: 31 [2019-10-22 09:01:11,357 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-10-22 09:01:11,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-22 09:01:11,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2019-10-22 09:01:11,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-22 09:01:11,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-10-22 09:01:11,362 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 12 [2019-10-22 09:01:11,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:11,363 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-10-22 09:01:11,363 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-22 09:01:11,363 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-10-22 09:01:11,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-22 09:01:11,363 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:11,364 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1] [2019-10-22 09:01:11,564 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:11,565 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:11,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:11,565 INFO L82 PathProgramCache]: Analyzing trace with hash -863807886, now seen corresponding path program 2 times [2019-10-22 09:01:11,565 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:11,565 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803560255] [2019-10-22 09:01:11,565 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:11,566 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:11,566 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:11,572 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-22 09:01:11,572 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [15157630] [2019-10-22 09:01:11,572 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1c761771-9fdc-4afd-83e8-948afe72066d/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 [2019-10-22 09:01:11,594 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 09:01:11,594 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:11,595 INFO L256 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-22 09:01:11,595 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:11,638 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:11,648 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:11,648 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803560255] [2019-10-22 09:01:11,648 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-22 09:01:11,648 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15157630] [2019-10-22 09:01:11,648 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-22 09:01:11,649 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-22 09:01:11,649 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918030436] [2019-10-22 09:01:11,649 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-22 09:01:11,649 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:11,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 09:01:11,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-22 09:01:11,650 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 6 states. [2019-10-22 09:01:11,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:11,772 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2019-10-22 09:01:11,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-22 09:01:11,772 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2019-10-22 09:01:11,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:11,772 INFO L225 Difference]: With dead ends: 38 [2019-10-22 09:01:11,773 INFO L226 Difference]: Without dead ends: 32 [2019-10-22 09:01:11,773 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-10-22 09:01:11,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-22 09:01:11,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 22. [2019-10-22 09:01:11,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-22 09:01:11,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2019-10-22 09:01:11,777 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 12 [2019-10-22 09:01:11,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:11,779 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2019-10-22 09:01:11,780 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-22 09:01:11,780 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2019-10-22 09:01:11,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-22 09:01:11,780 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:11,780 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1] [2019-10-22 09:01:11,982 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:11,983 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:11,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:11,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1087688533, now seen corresponding path program 3 times [2019-10-22 09:01:11,983 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:11,983 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431048760] [2019-10-22 09:01:11,983 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:11,983 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:11,983 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:11,988 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-22 09:01:11,988 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [257453953] [2019-10-22 09:01:11,988 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1c761771-9fdc-4afd-83e8-948afe72066d/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 [2019-10-22 09:01:12,020 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-22 09:01:12,020 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:12,021 WARN L254 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-22 09:01:12,022 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:12,057 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:12,080 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:12,087 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-22 09:01:12,087 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431048760] [2019-10-22 09:01:12,087 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-22 09:01:12,087 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257453953] [2019-10-22 09:01:12,088 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-22 09:01:12,088 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-22 09:01:12,088 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153285899] [2019-10-22 09:01:12,088 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-22 09:01:12,088 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:12,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 09:01:12,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-22 09:01:12,089 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 6 states. [2019-10-22 09:01:12,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:12,142 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2019-10-22 09:01:12,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 09:01:12,143 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2019-10-22 09:01:12,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:12,144 INFO L225 Difference]: With dead ends: 41 [2019-10-22 09:01:12,144 INFO L226 Difference]: Without dead ends: 35 [2019-10-22 09:01:12,144 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-22 09:01:12,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-22 09:01:12,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2019-10-22 09:01:12,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-22 09:01:12,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2019-10-22 09:01:12,152 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 16 [2019-10-22 09:01:12,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:12,152 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2019-10-22 09:01:12,152 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-22 09:01:12,152 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2019-10-22 09:01:12,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-22 09:01:12,153 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:12,153 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1] [2019-10-22 09:01:12,354 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:12,354 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:12,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:12,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1087628951, now seen corresponding path program 3 times [2019-10-22 09:01:12,355 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:12,355 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463809297] [2019-10-22 09:01:12,355 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:12,355 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:12,355 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:12,360 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-22 09:01:12,360 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1698918689] [2019-10-22 09:01:12,361 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1c761771-9fdc-4afd-83e8-948afe72066d/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 [2019-10-22 09:01:12,398 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-22 09:01:12,398 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:12,399 WARN L254 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-22 09:01:12,401 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:12,439 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:12,466 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:12,502 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-22 09:01:12,502 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463809297] [2019-10-22 09:01:12,502 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-22 09:01:12,502 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698918689] [2019-10-22 09:01:12,503 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-22 09:01:12,503 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-22 09:01:12,503 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873862400] [2019-10-22 09:01:12,503 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-22 09:01:12,503 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:12,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-22 09:01:12,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-22 09:01:12,503 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 7 states. [2019-10-22 09:01:12,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:12,638 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2019-10-22 09:01:12,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 09:01:12,638 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2019-10-22 09:01:12,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:12,639 INFO L225 Difference]: With dead ends: 44 [2019-10-22 09:01:12,639 INFO L226 Difference]: Without dead ends: 38 [2019-10-22 09:01:12,639 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-10-22 09:01:12,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-22 09:01:12,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 26. [2019-10-22 09:01:12,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-22 09:01:12,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-10-22 09:01:12,644 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 16 [2019-10-22 09:01:12,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:12,645 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-10-22 09:01:12,645 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-22 09:01:12,645 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-10-22 09:01:12,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-22 09:01:12,645 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:12,645 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1] [2019-10-22 09:01:12,846 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:12,846 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:12,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:12,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1897035159, now seen corresponding path program 4 times [2019-10-22 09:01:12,847 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:12,847 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374298136] [2019-10-22 09:01:12,847 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:12,847 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:12,847 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:12,852 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-22 09:01:12,852 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1656137584] [2019-10-22 09:01:12,852 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1c761771-9fdc-4afd-83e8-948afe72066d/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 [2019-10-22 09:01:12,877 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-22 09:01:12,878 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:12,878 WARN L254 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-22 09:01:12,879 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:13,092 WARN L191 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2019-10-22 09:01:13,094 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:17,248 WARN L191 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2019-10-22 09:01:17,249 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:21,362 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:23,573 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 5 refuted. 6 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-22 09:01:23,573 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374298136] [2019-10-22 09:01:23,574 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-22 09:01:23,574 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656137584] [2019-10-22 09:01:23,574 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-22 09:01:23,574 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-22 09:01:23,574 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253638989] [2019-10-22 09:01:23,575 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-22 09:01:23,575 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:23,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-22 09:01:23,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=26, Unknown=3, NotChecked=0, Total=42 [2019-10-22 09:01:23,575 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 7 states. [2019-10-22 09:01:25,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:25,624 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2019-10-22 09:01:25,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 09:01:25,625 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2019-10-22 09:01:25,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:25,625 INFO L225 Difference]: With dead ends: 26 [2019-10-22 09:01:25,625 INFO L226 Difference]: Without dead ends: 0 [2019-10-22 09:01:25,626 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=20, Invalid=33, Unknown=3, NotChecked=0, Total=56 [2019-10-22 09:01:25,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-22 09:01:25,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-22 09:01:25,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-22 09:01:25,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-22 09:01:25,627 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2019-10-22 09:01:25,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:25,627 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-22 09:01:25,627 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-22 09:01:25,627 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-22 09:01:25,627 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-22 09:01:25,827 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:25,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-22 09:01:26,076 INFO L446 ceAbstractionStarter]: At program point L6-5(lines 5 11) the Hoare annotation is: true [2019-10-22 09:01:26,076 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-22 09:01:26,076 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2019-10-22 09:01:26,076 INFO L443 ceAbstractionStarter]: For program point L7(lines 7 8) no Hoare annotation was computed. [2019-10-22 09:01:26,076 INFO L443 ceAbstractionStarter]: For program point L7-1(lines 7 8) no Hoare annotation was computed. [2019-10-22 09:01:26,077 INFO L443 ceAbstractionStarter]: For program point L32(lines 32 38) no Hoare annotation was computed. [2019-10-22 09:01:26,077 INFO L439 ceAbstractionStarter]: At program point L32-2(lines 26 39) the Hoare annotation is: (let ((.cse0 (= (+ (* ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~u~0) (* ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~v~0)) (* (* ULTIMATE.start_main_~a~0 2) ULTIMATE.start_main_~b~0)))) (or (and (= 1 ULTIMATE.start___VERIFIER_assert_~cond) .cse0) (and (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~u~0) (<= 1 ULTIMATE.start_main_~a~0) (= ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~x~0) .cse0 (= ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~v~0)))) [2019-10-22 09:01:26,077 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-10-22 09:01:26,077 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-22 09:01:26,077 INFO L443 ceAbstractionStarter]: For program point L26-2(lines 26 39) no Hoare annotation was computed. [2019-10-22 09:01:26,077 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2019-10-22 09:01:26,077 INFO L446 ceAbstractionStarter]: At program point L45(lines 13 46) the Hoare annotation is: true [2019-10-22 09:01:26,077 INFO L443 ceAbstractionStarter]: For program point L6(lines 6 9) no Hoare annotation was computed. [2019-10-22 09:01:26,077 INFO L439 ceAbstractionStarter]: At program point L6-2(lines 29 30) the Hoare annotation is: (and (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (= (+ (* ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~u~0) (* ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~v~0)) (* (* ULTIMATE.start_main_~a~0 2) ULTIMATE.start_main_~b~0))) [2019-10-22 09:01:26,077 INFO L443 ceAbstractionStarter]: For program point L6-3(lines 6 9) no Hoare annotation was computed. [2019-10-22 09:01:26,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 09:01:26 BoogieIcfgContainer [2019-10-22 09:01:26,091 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 09:01:26,091 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 09:01:26,091 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 09:01:26,091 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 09:01:26,092 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:01:08" (3/4) ... [2019-10-22 09:01:26,096 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-10-22 09:01:26,107 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-10-22 09:01:26,107 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-10-22 09:01:26,151 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_1c761771-9fdc-4afd-83e8-948afe72066d/bin/uautomizer/witness.graphml [2019-10-22 09:01:26,151 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 09:01:26,153 INFO L168 Benchmark]: Toolchain (without parser) took 18099.08 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 217.1 MB). Free memory was 941.8 MB in the beginning and 1.1 GB in the end (delta: -181.6 MB). Peak memory consumption was 35.4 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:26,154 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 966.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 09:01:26,155 INFO L168 Benchmark]: CACSL2BoogieTranslator took 316.57 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 162.0 MB). Free memory was 941.8 MB in the beginning and 1.2 GB in the end (delta: -220.2 MB). Peak memory consumption was 20.3 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:26,155 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.13 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:26,156 INFO L168 Benchmark]: Boogie Preprocessor took 21.12 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:26,156 INFO L168 Benchmark]: RCFGBuilder took 263.94 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 20.7 MB). Peak memory consumption was 20.7 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:26,157 INFO L168 Benchmark]: TraceAbstraction took 17398.60 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 55.1 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 8.0 MB). Peak memory consumption was 63.0 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:26,158 INFO L168 Benchmark]: Witness Printer took 60.63 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:26,161 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 966.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 316.57 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 162.0 MB). Free memory was 941.8 MB in the beginning and 1.2 GB in the end (delta: -220.2 MB). Peak memory consumption was 20.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 34.13 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 21.12 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 11.5 GB. * RCFGBuilder took 263.94 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 20.7 MB). Peak memory consumption was 20.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 17398.60 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 55.1 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 8.0 MB). Peak memory consumption was 63.0 MB. Max. memory is 11.5 GB. * Witness Printer took 60.63 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: (1 == cond && x * u + y * v == a * 2 * b) || ((((b == u && 1 <= a) && a == x) && x * u + y * v == a * 2 * b) && a == v) - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: 1 == cond && x * u + y * v == a * 2 * b - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 15 locations, 2 error locations. Result: SAFE, OverallTime: 17.3s, OverallIterations: 10, TraceHistogramMax: 4, AutomataDifference: 3.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, HoareTripleCheckerStatistics: 53 SDtfs, 98 SDslu, 158 SDs, 0 SdLazy, 440 SolverSat, 102 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 127 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 11.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 51 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 18 NumberOfFragments, 63 HoareAnnotationTreeSize, 4 FomulaSimplifications, 3462 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 4 FomulaSimplificationsInter, 3 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 11.3s InterpolantComputationTime, 116 NumberOfCodeBlocks, 107 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 106 ConstructedInterpolants, 5 QuantifiedInterpolants, 18699 SizeOfPredicates, 90 NumberOfNonLiveVariables, 439 ConjunctsInSsa, 227 ConjunctsInUnsatCore, 10 InterpolantComputations, 1 PerfectInterpolantSequences, 34/90 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...