./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-lit/gr2006.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 678e0110 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-lit/gr2006.i -s /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/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 76260ed82768318ee6f3ac3cb9cfff5a60080963 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-678e011 [2019-11-20 03:29:21,520 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 03:29:21,522 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 03:29:21,532 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 03:29:21,533 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 03:29:21,534 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 03:29:21,535 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 03:29:21,537 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 03:29:21,541 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 03:29:21,542 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 03:29:21,543 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 03:29:21,544 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 03:29:21,544 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 03:29:21,545 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 03:29:21,549 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 03:29:21,550 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 03:29:21,551 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 03:29:21,554 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 03:29:21,557 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 03:29:21,559 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 03:29:21,563 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 03:29:21,566 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 03:29:21,569 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 03:29:21,571 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 03:29:21,573 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 03:29:21,576 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 03:29:21,576 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 03:29:21,577 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 03:29:21,578 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 03:29:21,580 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 03:29:21,580 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 03:29:21,581 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 03:29:21,582 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 03:29:21,583 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 03:29:21,585 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 03:29:21,585 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 03:29:21,585 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 03:29:21,586 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 03:29:21,586 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 03:29:21,587 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 03:29:21,589 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 03:29:21,589 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-20 03:29:21,600 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 03:29:21,600 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 03:29:21,601 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 03:29:21,601 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 03:29:21,601 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 03:29:21,601 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 03:29:21,601 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 03:29:21,601 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 03:29:21,602 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 03:29:21,602 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 03:29:21,602 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-20 03:29:21,602 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 03:29:21,602 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-20 03:29:21,602 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 03:29:21,603 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 03:29:21,603 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 03:29:21,603 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-20 03:29:21,603 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 03:29:21,607 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 03:29:21,608 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 03:29:21,608 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 03:29:21,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 03:29:21,608 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 03:29:21,608 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 03:29:21,609 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-20 03:29:21,609 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-20 03:29:21,609 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-20 03:29:21,609 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-20 03:29:21,610 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/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 -> 76260ed82768318ee6f3ac3cb9cfff5a60080963 [2019-11-20 03:29:21,747 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 03:29:21,761 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 03:29:21,771 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 03:29:21,772 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 03:29:21,773 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 03:29:21,773 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/../../sv-benchmarks/c/loop-lit/gr2006.i [2019-11-20 03:29:21,839 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/data/94900ea3d/73f24284c5f84866bc40cf7a0debf3f8/FLAG6edc55725 [2019-11-20 03:29:22,202 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 03:29:22,202 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/sv-benchmarks/c/loop-lit/gr2006.i [2019-11-20 03:29:22,206 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/data/94900ea3d/73f24284c5f84866bc40cf7a0debf3f8/FLAG6edc55725 [2019-11-20 03:29:22,594 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/data/94900ea3d/73f24284c5f84866bc40cf7a0debf3f8 [2019-11-20 03:29:22,596 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 03:29:22,598 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 03:29:22,599 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 03:29:22,599 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 03:29:22,602 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 03:29:22,603 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 03:29:22" (1/1) ... [2019-11-20 03:29:22,605 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a660443 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:29:22, skipping insertion in model container [2019-11-20 03:29:22,606 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 03:29:22" (1/1) ... [2019-11-20 03:29:22,612 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 03:29:22,627 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 03:29:22,795 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 03:29:22,800 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 03:29:22,880 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 03:29:22,893 INFO L192 MainTranslator]: Completed translation [2019-11-20 03:29:22,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:29:22 WrapperNode [2019-11-20 03:29:22,895 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 03:29:22,896 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 03:29:22,896 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 03:29:22,896 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 03:29:22,904 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:29:22" (1/1) ... [2019-11-20 03:29:22,909 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:29:22" (1/1) ... [2019-11-20 03:29:22,924 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 03:29:22,924 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 03:29:22,924 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 03:29:22,924 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 03:29:22,931 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:29:22" (1/1) ... [2019-11-20 03:29:22,931 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:29:22" (1/1) ... [2019-11-20 03:29:22,931 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:29:22" (1/1) ... [2019-11-20 03:29:22,931 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:29:22" (1/1) ... [2019-11-20 03:29:22,933 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:29:22" (1/1) ... [2019-11-20 03:29:22,936 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:29:22" (1/1) ... [2019-11-20 03:29:22,937 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:29:22" (1/1) ... [2019-11-20 03:29:22,937 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 03:29:22,938 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 03:29:22,938 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 03:29:22,938 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 03:29:22,938 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:29:22" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 03:29:23,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 03:29:23,014 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 03:29:23,213 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 03:29:23,213 INFO L285 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-20 03:29:23,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 03:29:23 BoogieIcfgContainer [2019-11-20 03:29:23,215 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 03:29:23,216 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 03:29:23,216 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 03:29:23,218 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 03:29:23,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 03:29:22" (1/3) ... [2019-11-20 03:29:23,219 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26fe7a8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 03:29:23, skipping insertion in model container [2019-11-20 03:29:23,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:29:22" (2/3) ... [2019-11-20 03:29:23,220 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26fe7a8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 03:29:23, skipping insertion in model container [2019-11-20 03:29:23,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 03:29:23" (3/3) ... [2019-11-20 03:29:23,221 INFO L109 eAbstractionObserver]: Analyzing ICFG gr2006.i [2019-11-20 03:29:23,231 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 03:29:23,237 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-20 03:29:23,247 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-20 03:29:23,270 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 03:29:23,270 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-20 03:29:23,271 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 03:29:23,271 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 03:29:23,272 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 03:29:23,272 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 03:29:23,272 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 03:29:23,273 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 03:29:23,284 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2019-11-20 03:29:23,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-20 03:29:23,289 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:29:23,290 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-20 03:29:23,290 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:29:23,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:29:23,296 INFO L82 PathProgramCache]: Analyzing trace with hash 30262788, now seen corresponding path program 1 times [2019-11-20 03:29:23,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:29:23,303 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379913047] [2019-11-20 03:29:23,304 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:29:23,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:29:23,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:29:23,385 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379913047] [2019-11-20 03:29:23,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 03:29:23,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-20 03:29:23,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423738042] [2019-11-20 03:29:23,390 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-20 03:29:23,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:29:23,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-20 03:29:23,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-20 03:29:23,404 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2019-11-20 03:29:23,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:29:23,416 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2019-11-20 03:29:23,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-20 03:29:23,417 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2019-11-20 03:29:23,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:29:23,423 INFO L225 Difference]: With dead ends: 20 [2019-11-20 03:29:23,423 INFO L226 Difference]: Without dead ends: 8 [2019-11-20 03:29:23,426 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-20 03:29:23,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-11-20 03:29:23,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-11-20 03:29:23,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-20 03:29:23,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2019-11-20 03:29:23,450 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2019-11-20 03:29:23,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:29:23,450 INFO L462 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2019-11-20 03:29:23,450 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-20 03:29:23,450 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2019-11-20 03:29:23,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-20 03:29:23,450 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:29:23,451 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:29:23,451 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:29:23,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:29:23,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1365765045, now seen corresponding path program 1 times [2019-11-20 03:29:23,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:29:23,452 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397828014] [2019-11-20 03:29:23,452 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:29:23,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:29:23,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:29:23,503 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397828014] [2019-11-20 03:29:23,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 03:29:23,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-20 03:29:23,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558195385] [2019-11-20 03:29:23,505 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 03:29:23,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:29:23,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 03:29:23,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-20 03:29:23,506 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 4 states. [2019-11-20 03:29:23,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:29:23,560 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2019-11-20 03:29:23,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-20 03:29:23,561 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-11-20 03:29:23,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:29:23,562 INFO L225 Difference]: With dead ends: 16 [2019-11-20 03:29:23,562 INFO L226 Difference]: Without dead ends: 12 [2019-11-20 03:29:23,563 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-20 03:29:23,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-11-20 03:29:23,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-11-20 03:29:23,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-20 03:29:23,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2019-11-20 03:29:23,566 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 7 [2019-11-20 03:29:23,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:29:23,566 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2019-11-20 03:29:23,566 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 03:29:23,566 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2019-11-20 03:29:23,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-20 03:29:23,567 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:29:23,567 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:29:23,567 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:29:23,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:29:23,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1363918003, now seen corresponding path program 1 times [2019-11-20 03:29:23,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:29:23,568 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208132110] [2019-11-20 03:29:23,568 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:29:23,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:29:23,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:29:23,587 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208132110] [2019-11-20 03:29:23,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 03:29:23,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-20 03:29:23,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271309663] [2019-11-20 03:29:23,588 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 03:29:23,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:29:23,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 03:29:23,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 03:29:23,589 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 3 states. [2019-11-20 03:29:23,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:29:23,612 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2019-11-20 03:29:23,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 03:29:23,613 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2019-11-20 03:29:23,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:29:23,613 INFO L225 Difference]: With dead ends: 26 [2019-11-20 03:29:23,614 INFO L226 Difference]: Without dead ends: 15 [2019-11-20 03:29:23,614 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 03:29:23,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-20 03:29:23,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2019-11-20 03:29:23,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-20 03:29:23,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2019-11-20 03:29:23,618 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 7 [2019-11-20 03:29:23,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:29:23,618 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2019-11-20 03:29:23,618 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 03:29:23,618 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2019-11-20 03:29:23,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-20 03:29:23,619 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:29:23,619 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-20 03:29:23,619 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:29:23,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:29:23,620 INFO L82 PathProgramCache]: Analyzing trace with hash 10637259, now seen corresponding path program 1 times [2019-11-20 03:29:23,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:29:23,620 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277109420] [2019-11-20 03:29:23,620 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:29:23,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:29:23,647 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 03:29:23,648 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277109420] [2019-11-20 03:29:23,648 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921039468] [2019-11-20 03:29:23,648 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:29:23,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:29:23,697 INFO L255 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-20 03:29:23,703 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:29:23,720 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 03:29:23,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:29:23,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2019-11-20 03:29:23,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35811590] [2019-11-20 03:29:23,721 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 03:29:23,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:29:23,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 03:29:23,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-20 03:29:23,722 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 4 states. [2019-11-20 03:29:23,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:29:23,755 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2019-11-20 03:29:23,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-20 03:29:23,755 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-11-20 03:29:23,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:29:23,756 INFO L225 Difference]: With dead ends: 29 [2019-11-20 03:29:23,756 INFO L226 Difference]: Without dead ends: 18 [2019-11-20 03:29:23,757 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-20 03:29:23,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-20 03:29:23,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2019-11-20 03:29:23,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-20 03:29:23,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2019-11-20 03:29:23,761 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2019-11-20 03:29:23,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:29:23,761 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2019-11-20 03:29:23,761 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 03:29:23,761 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2019-11-20 03:29:23,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-20 03:29:23,762 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:29:23,762 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2019-11-20 03:29:23,965 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:29:23,965 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:29:23,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:29:23,965 INFO L82 PathProgramCache]: Analyzing trace with hash -300800067, now seen corresponding path program 2 times [2019-11-20 03:29:23,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:29:23,966 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731001599] [2019-11-20 03:29:23,966 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:29:23,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:29:24,041 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-20 03:29:24,041 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731001599] [2019-11-20 03:29:24,042 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002689383] [2019-11-20 03:29:24,042 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:29:24,077 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 03:29:24,078 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:29:24,078 INFO L255 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-20 03:29:24,079 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:29:24,127 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 03:29:24,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:29:24,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2019-11-20 03:29:24,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481046368] [2019-11-20 03:29:24,128 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-20 03:29:24,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:29:24,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-20 03:29:24,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-11-20 03:29:24,129 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 9 states. [2019-11-20 03:29:24,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:29:24,369 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2019-11-20 03:29:24,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-20 03:29:24,370 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2019-11-20 03:29:24,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:29:24,371 INFO L225 Difference]: With dead ends: 48 [2019-11-20 03:29:24,371 INFO L226 Difference]: Without dead ends: 37 [2019-11-20 03:29:24,372 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2019-11-20 03:29:24,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-20 03:29:24,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2019-11-20 03:29:24,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-20 03:29:24,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2019-11-20 03:29:24,380 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 16 [2019-11-20 03:29:24,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:29:24,380 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2019-11-20 03:29:24,381 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-20 03:29:24,381 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2019-11-20 03:29:24,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-20 03:29:24,382 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:29:24,382 INFO L410 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 1, 1, 1, 1, 1] [2019-11-20 03:29:24,587 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:29:24,588 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:29:24,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:29:24,588 INFO L82 PathProgramCache]: Analyzing trace with hash 499970687, now seen corresponding path program 3 times [2019-11-20 03:29:24,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:29:24,589 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993765856] [2019-11-20 03:29:24,589 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:29:24,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:29:24,699 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-20 03:29:24,699 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993765856] [2019-11-20 03:29:24,699 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969512252] [2019-11-20 03:29:24,699 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:29:24,739 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-20 03:29:24,747 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:29:24,749 INFO L255 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 03:29:24,751 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:29:24,814 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-20 03:29:24,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:29:24,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2019-11-20 03:29:24,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113124363] [2019-11-20 03:29:24,816 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-20 03:29:24,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:29:24,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-20 03:29:24,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2019-11-20 03:29:24,817 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 11 states. [2019-11-20 03:29:25,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:29:25,036 INFO L93 Difference]: Finished difference Result 75 states and 97 transitions. [2019-11-20 03:29:25,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-20 03:29:25,037 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2019-11-20 03:29:25,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:29:25,039 INFO L225 Difference]: With dead ends: 75 [2019-11-20 03:29:25,039 INFO L226 Difference]: Without dead ends: 71 [2019-11-20 03:29:25,040 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=245, Unknown=0, NotChecked=0, Total=380 [2019-11-20 03:29:25,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-20 03:29:25,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 38. [2019-11-20 03:29:25,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-20 03:29:25,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2019-11-20 03:29:25,063 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 22 [2019-11-20 03:29:25,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:29:25,063 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2019-11-20 03:29:25,063 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-20 03:29:25,063 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2019-11-20 03:29:25,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-20 03:29:25,066 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:29:25,066 INFO L410 BasicCegarLoop]: trace histogram [11, 10, 8, 3, 1, 1, 1, 1, 1] [2019-11-20 03:29:25,269 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:29:25,270 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:29:25,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:29:25,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1791970037, now seen corresponding path program 4 times [2019-11-20 03:29:25,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:29:25,270 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196814049] [2019-11-20 03:29:25,270 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:29:25,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:29:25,485 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 81 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:29:25,485 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196814049] [2019-11-20 03:29:25,486 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084533905] [2019-11-20 03:29:25,486 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:29:25,528 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 03:29:25,528 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:29:25,529 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-20 03:29:25,531 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:29:25,606 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 80 proven. 15 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-20 03:29:25,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:29:25,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5] total 19 [2019-11-20 03:29:25,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136025396] [2019-11-20 03:29:25,607 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-20 03:29:25,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:29:25,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-20 03:29:25,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2019-11-20 03:29:25,608 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 20 states. [2019-11-20 03:29:25,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:29:25,740 INFO L93 Difference]: Finished difference Result 71 states and 88 transitions. [2019-11-20 03:29:25,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 03:29:25,744 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 37 [2019-11-20 03:29:25,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:29:25,745 INFO L225 Difference]: With dead ends: 71 [2019-11-20 03:29:25,745 INFO L226 Difference]: Without dead ends: 42 [2019-11-20 03:29:25,746 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=535, Unknown=0, NotChecked=0, Total=702 [2019-11-20 03:29:25,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-20 03:29:25,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-11-20 03:29:25,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-20 03:29:25,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2019-11-20 03:29:25,757 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 37 [2019-11-20 03:29:25,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:29:25,758 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2019-11-20 03:29:25,758 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-20 03:29:25,758 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2019-11-20 03:29:25,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-20 03:29:25,759 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:29:25,759 INFO L410 BasicCegarLoop]: trace histogram [12, 11, 8, 4, 1, 1, 1, 1, 1] [2019-11-20 03:29:25,959 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:29:25,960 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:29:25,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:29:25,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1811175165, now seen corresponding path program 5 times [2019-11-20 03:29:25,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:29:25,960 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33909533] [2019-11-20 03:29:25,961 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:29:25,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:29:26,187 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 84 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:29:26,187 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33909533] [2019-11-20 03:29:26,188 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16945447] [2019-11-20 03:29:26,188 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:29:26,237 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-20 03:29:26,237 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:29:26,238 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 03:29:26,240 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:29:26,355 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 102 proven. 26 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-20 03:29:26,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:29:26,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 6] total 22 [2019-11-20 03:29:26,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174436920] [2019-11-20 03:29:26,356 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-20 03:29:26,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:29:26,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-20 03:29:26,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2019-11-20 03:29:26,357 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand 23 states. [2019-11-20 03:29:26,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:29:26,535 INFO L93 Difference]: Finished difference Result 74 states and 91 transitions. [2019-11-20 03:29:26,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-20 03:29:26,535 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 40 [2019-11-20 03:29:26,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:29:26,536 INFO L225 Difference]: With dead ends: 74 [2019-11-20 03:29:26,536 INFO L226 Difference]: Without dead ends: 45 [2019-11-20 03:29:26,537 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=238, Invalid=754, Unknown=0, NotChecked=0, Total=992 [2019-11-20 03:29:26,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-20 03:29:26,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2019-11-20 03:29:26,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-20 03:29:26,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2019-11-20 03:29:26,543 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 40 [2019-11-20 03:29:26,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:29:26,543 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2019-11-20 03:29:26,543 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-20 03:29:26,543 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2019-11-20 03:29:26,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-20 03:29:26,544 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:29:26,545 INFO L410 BasicCegarLoop]: trace histogram [13, 12, 8, 5, 1, 1, 1, 1, 1] [2019-11-20 03:29:26,751 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:29:26,752 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:29:26,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:29:26,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1007740981, now seen corresponding path program 6 times [2019-11-20 03:29:26,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:29:26,752 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119758095] [2019-11-20 03:29:26,752 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:29:26,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:29:27,073 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 87 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:29:27,074 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119758095] [2019-11-20 03:29:27,074 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500636454] [2019-11-20 03:29:27,074 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:29:27,110 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-20 03:29:27,110 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:29:27,111 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 03:29:27,113 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:29:27,198 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 124 proven. 40 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-20 03:29:27,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:29:27,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 7] total 25 [2019-11-20 03:29:27,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260626690] [2019-11-20 03:29:27,199 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-20 03:29:27,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:29:27,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-20 03:29:27,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2019-11-20 03:29:27,200 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 26 states. [2019-11-20 03:29:27,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:29:27,472 INFO L93 Difference]: Finished difference Result 77 states and 94 transitions. [2019-11-20 03:29:27,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-20 03:29:27,472 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 43 [2019-11-20 03:29:27,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:29:27,473 INFO L225 Difference]: With dead ends: 77 [2019-11-20 03:29:27,473 INFO L226 Difference]: Without dead ends: 48 [2019-11-20 03:29:27,474 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=324, Invalid=1008, Unknown=0, NotChecked=0, Total=1332 [2019-11-20 03:29:27,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-20 03:29:27,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2019-11-20 03:29:27,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-20 03:29:27,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2019-11-20 03:29:27,479 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 43 [2019-11-20 03:29:27,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:29:27,480 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2019-11-20 03:29:27,480 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-20 03:29:27,480 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2019-11-20 03:29:27,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-20 03:29:27,481 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:29:27,481 INFO L410 BasicCegarLoop]: trace histogram [14, 13, 8, 6, 1, 1, 1, 1, 1] [2019-11-20 03:29:27,685 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:29:27,685 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:29:27,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:29:27,685 INFO L82 PathProgramCache]: Analyzing trace with hash 156892221, now seen corresponding path program 7 times [2019-11-20 03:29:27,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:29:27,686 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011868948] [2019-11-20 03:29:27,686 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:29:27,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:29:27,949 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 90 proven. 183 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:29:27,949 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011868948] [2019-11-20 03:29:27,950 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789291341] [2019-11-20 03:29:27,950 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:29:28,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:29:28,001 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 03:29:28,004 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:29:28,170 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 146 proven. 57 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-20 03:29:28,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:29:28,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 8] total 28 [2019-11-20 03:29:28,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560064722] [2019-11-20 03:29:28,171 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-20 03:29:28,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:29:28,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-20 03:29:28,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=637, Unknown=0, NotChecked=0, Total=812 [2019-11-20 03:29:28,172 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 29 states. [2019-11-20 03:29:28,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:29:28,405 INFO L93 Difference]: Finished difference Result 80 states and 97 transitions. [2019-11-20 03:29:28,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-20 03:29:28,405 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 46 [2019-11-20 03:29:28,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:29:28,406 INFO L225 Difference]: With dead ends: 80 [2019-11-20 03:29:28,406 INFO L226 Difference]: Without dead ends: 51 [2019-11-20 03:29:28,407 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=425, Invalid=1297, Unknown=0, NotChecked=0, Total=1722 [2019-11-20 03:29:28,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-20 03:29:28,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2019-11-20 03:29:28,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-20 03:29:28,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2019-11-20 03:29:28,413 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 46 [2019-11-20 03:29:28,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:29:28,413 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2019-11-20 03:29:28,413 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-20 03:29:28,413 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2019-11-20 03:29:28,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-20 03:29:28,414 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:29:28,414 INFO L410 BasicCegarLoop]: trace histogram [15, 14, 8, 7, 1, 1, 1, 1, 1] [2019-11-20 03:29:28,620 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:29:28,620 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:29:28,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:29:28,621 INFO L82 PathProgramCache]: Analyzing trace with hash 998795915, now seen corresponding path program 8 times [2019-11-20 03:29:28,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:29:28,621 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830573135] [2019-11-20 03:29:28,621 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:29:28,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:29:28,716 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 168 proven. 77 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-20 03:29:28,716 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830573135] [2019-11-20 03:29:28,716 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934389722] [2019-11-20 03:29:28,716 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:29:28,757 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 03:29:28,757 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:29:28,758 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-20 03:29:28,759 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:29:28,768 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 168 proven. 77 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-20 03:29:28,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:29:28,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2019-11-20 03:29:28,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873990300] [2019-11-20 03:29:28,769 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 03:29:28,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:29:28,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 03:29:28,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-20 03:29:28,770 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand 10 states. [2019-11-20 03:29:28,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:29:28,805 INFO L93 Difference]: Finished difference Result 83 states and 100 transitions. [2019-11-20 03:29:28,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 03:29:28,805 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 49 [2019-11-20 03:29:28,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:29:28,806 INFO L225 Difference]: With dead ends: 83 [2019-11-20 03:29:28,806 INFO L226 Difference]: Without dead ends: 54 [2019-11-20 03:29:28,806 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-20 03:29:28,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-20 03:29:28,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2019-11-20 03:29:28,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-20 03:29:28,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2019-11-20 03:29:28,812 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 49 [2019-11-20 03:29:28,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:29:28,813 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2019-11-20 03:29:28,813 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 03:29:28,813 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2019-11-20 03:29:28,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-20 03:29:28,814 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:29:28,814 INFO L410 BasicCegarLoop]: trace histogram [16, 15, 8, 8, 1, 1, 1, 1, 1] [2019-11-20 03:29:29,019 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:29:29,020 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:29:29,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:29:29,020 INFO L82 PathProgramCache]: Analyzing trace with hash -457264771, now seen corresponding path program 9 times [2019-11-20 03:29:29,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:29:29,020 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355565378] [2019-11-20 03:29:29,021 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:29:29,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:29:29,133 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-20 03:29:29,133 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355565378] [2019-11-20 03:29:29,133 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258338457] [2019-11-20 03:29:29,133 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:29:29,169 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-11-20 03:29:29,169 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:29:29,169 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-20 03:29:29,171 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:29:29,314 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 177 proven. 162 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-20 03:29:29,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:29:29,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2019-11-20 03:29:29,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600907062] [2019-11-20 03:29:29,316 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-20 03:29:29,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:29:29,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-20 03:29:29,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2019-11-20 03:29:29,316 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand 21 states. [2019-11-20 03:29:29,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:29:29,676 INFO L93 Difference]: Finished difference Result 225 states and 297 transitions. [2019-11-20 03:29:29,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-20 03:29:29,676 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 52 [2019-11-20 03:29:29,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:29:29,678 INFO L225 Difference]: With dead ends: 225 [2019-11-20 03:29:29,678 INFO L226 Difference]: Without dead ends: 221 [2019-11-20 03:29:29,679 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=500, Invalid=1060, Unknown=0, NotChecked=0, Total=1560 [2019-11-20 03:29:29,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2019-11-20 03:29:29,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 83. [2019-11-20 03:29:29,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-20 03:29:29,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 101 transitions. [2019-11-20 03:29:29,701 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 101 transitions. Word has length 52 [2019-11-20 03:29:29,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:29:29,703 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 101 transitions. [2019-11-20 03:29:29,703 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-20 03:29:29,703 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 101 transitions. [2019-11-20 03:29:29,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-11-20 03:29:29,706 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:29:29,706 INFO L410 BasicCegarLoop]: trace histogram [26, 25, 18, 8, 1, 1, 1, 1, 1] [2019-11-20 03:29:29,908 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:29:29,909 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:29:29,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:29:29,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1075705725, now seen corresponding path program 10 times [2019-11-20 03:29:29,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:29:29,909 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486903652] [2019-11-20 03:29:29,909 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:29:29,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:29:30,392 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 451 proven. 524 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:29:30,392 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486903652] [2019-11-20 03:29:30,392 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805237691] [2019-11-20 03:29:30,392 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:29:30,437 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 03:29:30,437 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:29:30,438 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 03:29:30,441 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:29:30,683 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 450 proven. 100 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2019-11-20 03:29:30,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:29:30,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 10] total 44 [2019-11-20 03:29:30,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646487816] [2019-11-20 03:29:30,684 INFO L442 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-11-20 03:29:30,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:29:30,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-11-20 03:29:30,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=1585, Unknown=0, NotChecked=0, Total=1980 [2019-11-20 03:29:30,685 INFO L87 Difference]: Start difference. First operand 83 states and 101 transitions. Second operand 45 states. [2019-11-20 03:29:31,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:29:31,051 INFO L93 Difference]: Finished difference Result 146 states and 183 transitions. [2019-11-20 03:29:31,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-20 03:29:31,052 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 82 [2019-11-20 03:29:31,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:29:31,053 INFO L225 Difference]: With dead ends: 146 [2019-11-20 03:29:31,053 INFO L226 Difference]: Without dead ends: 87 [2019-11-20 03:29:31,054 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=807, Invalid=2975, Unknown=0, NotChecked=0, Total=3782 [2019-11-20 03:29:31,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-11-20 03:29:31,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2019-11-20 03:29:31,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-11-20 03:29:31,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 104 transitions. [2019-11-20 03:29:31,062 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 104 transitions. Word has length 82 [2019-11-20 03:29:31,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:29:31,063 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 104 transitions. [2019-11-20 03:29:31,063 INFO L463 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-11-20 03:29:31,063 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 104 transitions. [2019-11-20 03:29:31,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-11-20 03:29:31,072 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:29:31,073 INFO L410 BasicCegarLoop]: trace histogram [27, 26, 18, 9, 1, 1, 1, 1, 1] [2019-11-20 03:29:31,287 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:29:31,288 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:29:31,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:29:31,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1924147509, now seen corresponding path program 11 times [2019-11-20 03:29:31,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:29:31,288 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202313321] [2019-11-20 03:29:31,288 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:29:31,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:29:31,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1053 backedges. 454 proven. 599 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:29:31,918 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202313321] [2019-11-20 03:29:31,919 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101775883] [2019-11-20 03:29:31,919 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:29:31,988 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) [2019-11-20 03:29:31,988 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:29:31,989 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-20 03:29:31,992 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:29:32,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1053 backedges. 502 proven. 126 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2019-11-20 03:29:32,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:29:32,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 11] total 47 [2019-11-20 03:29:32,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316416276] [2019-11-20 03:29:32,232 INFO L442 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-11-20 03:29:32,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:29:32,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-11-20 03:29:32,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=445, Invalid=1811, Unknown=0, NotChecked=0, Total=2256 [2019-11-20 03:29:32,233 INFO L87 Difference]: Start difference. First operand 86 states and 104 transitions. Second operand 48 states. [2019-11-20 03:29:32,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:29:32,768 INFO L93 Difference]: Finished difference Result 149 states and 186 transitions. [2019-11-20 03:29:32,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-20 03:29:32,768 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 85 [2019-11-20 03:29:32,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:29:32,769 INFO L225 Difference]: With dead ends: 149 [2019-11-20 03:29:32,769 INFO L226 Difference]: Without dead ends: 90 [2019-11-20 03:29:32,770 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1121 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=953, Invalid=3469, Unknown=0, NotChecked=0, Total=4422 [2019-11-20 03:29:32,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-11-20 03:29:32,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2019-11-20 03:29:32,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-11-20 03:29:32,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 107 transitions. [2019-11-20 03:29:32,780 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 107 transitions. Word has length 85 [2019-11-20 03:29:32,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:29:32,780 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 107 transitions. [2019-11-20 03:29:32,780 INFO L463 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-11-20 03:29:32,780 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 107 transitions. [2019-11-20 03:29:32,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-11-20 03:29:32,781 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:29:32,781 INFO L410 BasicCegarLoop]: trace histogram [28, 27, 18, 10, 1, 1, 1, 1, 1] [2019-11-20 03:29:32,983 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:29:32,984 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:29:32,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:29:32,984 INFO L82 PathProgramCache]: Analyzing trace with hash -872346435, now seen corresponding path program 12 times [2019-11-20 03:29:32,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:29:32,984 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951968652] [2019-11-20 03:29:32,984 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:29:32,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:29:33,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 457 proven. 677 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:29:33,591 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951968652] [2019-11-20 03:29:33,591 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978296199] [2019-11-20 03:29:33,591 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:29:33,639 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2019-11-20 03:29:33,639 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:29:33,640 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-20 03:29:33,643 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:29:33,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 554 proven. 155 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2019-11-20 03:29:33,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:29:33,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 12] total 50 [2019-11-20 03:29:33,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372485388] [2019-11-20 03:29:33,924 INFO L442 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-11-20 03:29:33,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:29:33,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-11-20 03:29:33,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=2050, Unknown=0, NotChecked=0, Total=2550 [2019-11-20 03:29:33,926 INFO L87 Difference]: Start difference. First operand 89 states and 107 transitions. Second operand 51 states. [2019-11-20 03:29:34,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:29:34,405 INFO L93 Difference]: Finished difference Result 152 states and 189 transitions. [2019-11-20 03:29:34,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-20 03:29:34,405 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 88 [2019-11-20 03:29:34,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:29:34,406 INFO L225 Difference]: With dead ends: 152 [2019-11-20 03:29:34,406 INFO L226 Difference]: Without dead ends: 93 [2019-11-20 03:29:34,408 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1114, Invalid=3998, Unknown=0, NotChecked=0, Total=5112 [2019-11-20 03:29:34,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-11-20 03:29:34,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2019-11-20 03:29:34,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-11-20 03:29:34,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 110 transitions. [2019-11-20 03:29:34,416 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 110 transitions. Word has length 88 [2019-11-20 03:29:34,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:29:34,416 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 110 transitions. [2019-11-20 03:29:34,416 INFO L463 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-11-20 03:29:34,416 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 110 transitions. [2019-11-20 03:29:34,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-20 03:29:34,417 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:29:34,418 INFO L410 BasicCegarLoop]: trace histogram [29, 28, 18, 11, 1, 1, 1, 1, 1] [2019-11-20 03:29:34,621 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:29:34,621 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:29:34,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:29:34,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1547024779, now seen corresponding path program 13 times [2019-11-20 03:29:34,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:29:34,622 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163988214] [2019-11-20 03:29:34,622 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:29:34,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:29:35,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 460 proven. 758 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:29:35,413 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163988214] [2019-11-20 03:29:35,413 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482918558] [2019-11-20 03:29:35,413 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:29:35,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:29:35,471 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-20 03:29:35,473 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:29:35,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 606 proven. 187 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2019-11-20 03:29:35,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:29:35,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 13] total 53 [2019-11-20 03:29:35,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692989103] [2019-11-20 03:29:35,781 INFO L442 AbstractCegarLoop]: Interpolant automaton has 54 states [2019-11-20 03:29:35,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:29:35,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2019-11-20 03:29:35,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=560, Invalid=2302, Unknown=0, NotChecked=0, Total=2862 [2019-11-20 03:29:35,782 INFO L87 Difference]: Start difference. First operand 92 states and 110 transitions. Second operand 54 states. [2019-11-20 03:29:36,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:29:36,285 INFO L93 Difference]: Finished difference Result 155 states and 192 transitions. [2019-11-20 03:29:36,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-20 03:29:36,285 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 91 [2019-11-20 03:29:36,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:29:36,286 INFO L225 Difference]: With dead ends: 155 [2019-11-20 03:29:36,286 INFO L226 Difference]: Without dead ends: 96 [2019-11-20 03:29:36,288 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1451 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1290, Invalid=4562, Unknown=0, NotChecked=0, Total=5852 [2019-11-20 03:29:36,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-11-20 03:29:36,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2019-11-20 03:29:36,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-11-20 03:29:36,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 113 transitions. [2019-11-20 03:29:36,294 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 113 transitions. Word has length 91 [2019-11-20 03:29:36,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:29:36,294 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 113 transitions. [2019-11-20 03:29:36,294 INFO L463 AbstractCegarLoop]: Interpolant automaton has 54 states. [2019-11-20 03:29:36,294 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 113 transitions. [2019-11-20 03:29:36,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-11-20 03:29:36,295 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:29:36,295 INFO L410 BasicCegarLoop]: trace histogram [30, 29, 18, 12, 1, 1, 1, 1, 1] [2019-11-20 03:29:36,499 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:29:36,499 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:29:36,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:29:36,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1106300419, now seen corresponding path program 14 times [2019-11-20 03:29:36,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:29:36,500 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101391558] [2019-11-20 03:29:36,500 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:29:36,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:29:37,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1305 backedges. 463 proven. 842 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:29:37,208 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101391558] [2019-11-20 03:29:37,209 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074715793] [2019-11-20 03:29:37,209 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:29:37,248 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 03:29:37,249 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:29:37,249 INFO L255 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-20 03:29:37,250 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:29:37,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1305 backedges. 658 proven. 222 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2019-11-20 03:29:37,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:29:37,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 14] total 56 [2019-11-20 03:29:37,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218702752] [2019-11-20 03:29:37,570 INFO L442 AbstractCegarLoop]: Interpolant automaton has 57 states [2019-11-20 03:29:37,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:29:37,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2019-11-20 03:29:37,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=625, Invalid=2567, Unknown=0, NotChecked=0, Total=3192 [2019-11-20 03:29:37,572 INFO L87 Difference]: Start difference. First operand 95 states and 113 transitions. Second operand 57 states. [2019-11-20 03:29:38,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:29:38,092 INFO L93 Difference]: Finished difference Result 158 states and 195 transitions. [2019-11-20 03:29:38,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-20 03:29:38,095 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 94 [2019-11-20 03:29:38,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:29:38,096 INFO L225 Difference]: With dead ends: 158 [2019-11-20 03:29:38,096 INFO L226 Difference]: Without dead ends: 99 [2019-11-20 03:29:38,098 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1628 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1481, Invalid=5161, Unknown=0, NotChecked=0, Total=6642 [2019-11-20 03:29:38,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-11-20 03:29:38,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2019-11-20 03:29:38,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-11-20 03:29:38,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 116 transitions. [2019-11-20 03:29:38,104 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 116 transitions. Word has length 94 [2019-11-20 03:29:38,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:29:38,104 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 116 transitions. [2019-11-20 03:29:38,105 INFO L463 AbstractCegarLoop]: Interpolant automaton has 57 states. [2019-11-20 03:29:38,105 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 116 transitions. [2019-11-20 03:29:38,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-11-20 03:29:38,106 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:29:38,106 INFO L410 BasicCegarLoop]: trace histogram [31, 30, 18, 13, 1, 1, 1, 1, 1] [2019-11-20 03:29:38,307 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:29:38,308 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:29:38,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:29:38,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1739158453, now seen corresponding path program 15 times [2019-11-20 03:29:38,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:29:38,308 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951613601] [2019-11-20 03:29:38,308 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:29:38,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:29:39,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 466 proven. 929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:29:39,048 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951613601] [2019-11-20 03:29:39,049 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919745279] [2019-11-20 03:29:39,049 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:29:39,101 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2019-11-20 03:29:39,101 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:29:39,102 INFO L255 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-20 03:29:39,103 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:29:39,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 875 proven. 482 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-11-20 03:29:39,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:29:39,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 19] total 63 [2019-11-20 03:29:39,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746179057] [2019-11-20 03:29:39,592 INFO L442 AbstractCegarLoop]: Interpolant automaton has 64 states [2019-11-20 03:29:39,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:29:39,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2019-11-20 03:29:39,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1071, Invalid=2961, Unknown=0, NotChecked=0, Total=4032 [2019-11-20 03:29:39,593 INFO L87 Difference]: Start difference. First operand 98 states and 116 transitions. Second operand 64 states. [2019-11-20 03:29:40,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:29:40,265 INFO L93 Difference]: Finished difference Result 161 states and 198 transitions. [2019-11-20 03:29:40,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-20 03:29:40,267 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 97 [2019-11-20 03:29:40,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:29:40,268 INFO L225 Difference]: With dead ends: 161 [2019-11-20 03:29:40,268 INFO L226 Difference]: Without dead ends: 101 [2019-11-20 03:29:40,271 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2521 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2075, Invalid=6297, Unknown=0, NotChecked=0, Total=8372 [2019-11-20 03:29:40,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-11-20 03:29:40,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2019-11-20 03:29:40,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-11-20 03:29:40,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 119 transitions. [2019-11-20 03:29:40,277 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 119 transitions. Word has length 97 [2019-11-20 03:29:40,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:29:40,277 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 119 transitions. [2019-11-20 03:29:40,277 INFO L463 AbstractCegarLoop]: Interpolant automaton has 64 states. [2019-11-20 03:29:40,277 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 119 transitions. [2019-11-20 03:29:40,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-11-20 03:29:40,278 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:29:40,278 INFO L410 BasicCegarLoop]: trace histogram [32, 31, 18, 14, 1, 1, 1, 1, 1] [2019-11-20 03:29:40,481 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:29:40,481 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:29:40,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:29:40,482 INFO L82 PathProgramCache]: Analyzing trace with hash -306419907, now seen corresponding path program 16 times [2019-11-20 03:29:40,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:29:40,482 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036595103] [2019-11-20 03:29:40,482 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:29:40,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:29:41,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1488 backedges. 469 proven. 1019 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:29:41,499 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036595103] [2019-11-20 03:29:41,500 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458658869] [2019-11-20 03:29:41,500 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:29:41,541 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 03:29:41,542 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:29:41,542 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-20 03:29:41,543 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:29:41,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1488 backedges. 762 proven. 301 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2019-11-20 03:29:41,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:29:41,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 16] total 62 [2019-11-20 03:29:41,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372932211] [2019-11-20 03:29:41,938 INFO L442 AbstractCegarLoop]: Interpolant automaton has 63 states [2019-11-20 03:29:41,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:29:41,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2019-11-20 03:29:41,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=770, Invalid=3136, Unknown=0, NotChecked=0, Total=3906 [2019-11-20 03:29:41,940 INFO L87 Difference]: Start difference. First operand 101 states and 119 transitions. Second operand 63 states. [2019-11-20 03:29:42,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:29:42,637 INFO L93 Difference]: Finished difference Result 164 states and 201 transitions. [2019-11-20 03:29:42,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-20 03:29:42,637 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 100 [2019-11-20 03:29:42,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:29:42,638 INFO L225 Difference]: With dead ends: 164 [2019-11-20 03:29:42,638 INFO L226 Difference]: Without dead ends: 105 [2019-11-20 03:29:42,639 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1908, Invalid=6464, Unknown=0, NotChecked=0, Total=8372 [2019-11-20 03:29:42,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-11-20 03:29:42,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2019-11-20 03:29:42,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-11-20 03:29:42,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 122 transitions. [2019-11-20 03:29:42,644 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 122 transitions. Word has length 100 [2019-11-20 03:29:42,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:29:42,644 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 122 transitions. [2019-11-20 03:29:42,644 INFO L463 AbstractCegarLoop]: Interpolant automaton has 63 states. [2019-11-20 03:29:42,644 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 122 transitions. [2019-11-20 03:29:42,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-11-20 03:29:42,645 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:29:42,645 INFO L410 BasicCegarLoop]: trace histogram [33, 32, 18, 15, 1, 1, 1, 1, 1] [2019-11-20 03:29:42,847 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:29:42,848 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:29:42,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:29:42,848 INFO L82 PathProgramCache]: Analyzing trace with hash -977383669, now seen corresponding path program 17 times [2019-11-20 03:29:42,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:29:42,848 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407377277] [2019-11-20 03:29:42,848 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:29:42,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:29:43,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1584 backedges. 472 proven. 1112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:29:43,742 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407377277] [2019-11-20 03:29:43,742 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33800655] [2019-11-20 03:29:43,742 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:29:43,802 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 33 check-sat command(s) [2019-11-20 03:29:43,802 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:29:43,803 INFO L255 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-20 03:29:43,805 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:29:44,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1584 backedges. 814 proven. 345 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2019-11-20 03:29:44,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:29:44,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 17] total 65 [2019-11-20 03:29:44,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767233876] [2019-11-20 03:29:44,285 INFO L442 AbstractCegarLoop]: Interpolant automaton has 66 states [2019-11-20 03:29:44,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:29:44,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2019-11-20 03:29:44,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=850, Invalid=3440, Unknown=0, NotChecked=0, Total=4290 [2019-11-20 03:29:44,287 INFO L87 Difference]: Start difference. First operand 104 states and 122 transitions. Second operand 66 states. [2019-11-20 03:29:45,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:29:45,077 INFO L93 Difference]: Finished difference Result 167 states and 204 transitions. [2019-11-20 03:29:45,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-20 03:29:45,078 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 103 [2019-11-20 03:29:45,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:29:45,078 INFO L225 Difference]: With dead ends: 167 [2019-11-20 03:29:45,078 INFO L226 Difference]: Without dead ends: 108 [2019-11-20 03:29:45,079 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2207 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2144, Invalid=7168, Unknown=0, NotChecked=0, Total=9312 [2019-11-20 03:29:45,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-11-20 03:29:45,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2019-11-20 03:29:45,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-11-20 03:29:45,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 125 transitions. [2019-11-20 03:29:45,084 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 125 transitions. Word has length 103 [2019-11-20 03:29:45,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:29:45,085 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 125 transitions. [2019-11-20 03:29:45,085 INFO L463 AbstractCegarLoop]: Interpolant automaton has 66 states. [2019-11-20 03:29:45,085 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 125 transitions. [2019-11-20 03:29:45,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-11-20 03:29:45,085 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:29:45,086 INFO L410 BasicCegarLoop]: trace histogram [34, 33, 18, 16, 1, 1, 1, 1, 1] [2019-11-20 03:29:45,289 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:29:45,289 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:29:45,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:29:45,289 INFO L82 PathProgramCache]: Analyzing trace with hash -881021827, now seen corresponding path program 18 times [2019-11-20 03:29:45,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:29:45,289 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586705105] [2019-11-20 03:29:45,289 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:29:45,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:29:46,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 475 proven. 1208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:29:46,238 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586705105] [2019-11-20 03:29:46,238 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563973645] [2019-11-20 03:29:46,238 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:29:46,294 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2019-11-20 03:29:46,294 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:29:46,295 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-20 03:29:46,296 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:29:46,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 866 proven. 392 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2019-11-20 03:29:46,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:29:46,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 18] total 68 [2019-11-20 03:29:46,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783361487] [2019-11-20 03:29:46,804 INFO L442 AbstractCegarLoop]: Interpolant automaton has 69 states [2019-11-20 03:29:46,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:29:46,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2019-11-20 03:29:46,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=935, Invalid=3757, Unknown=0, NotChecked=0, Total=4692 [2019-11-20 03:29:46,805 INFO L87 Difference]: Start difference. First operand 107 states and 125 transitions. Second operand 69 states. [2019-11-20 03:29:47,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:29:47,613 INFO L93 Difference]: Finished difference Result 170 states and 207 transitions. [2019-11-20 03:29:47,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-20 03:29:47,613 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 106 [2019-11-20 03:29:47,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:29:47,614 INFO L225 Difference]: With dead ends: 170 [2019-11-20 03:29:47,614 INFO L226 Difference]: Without dead ends: 111 [2019-11-20 03:29:47,615 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2416 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2395, Invalid=7907, Unknown=0, NotChecked=0, Total=10302 [2019-11-20 03:29:47,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-11-20 03:29:47,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2019-11-20 03:29:47,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-11-20 03:29:47,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 128 transitions. [2019-11-20 03:29:47,618 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 128 transitions. Word has length 106 [2019-11-20 03:29:47,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:29:47,619 INFO L462 AbstractCegarLoop]: Abstraction has 110 states and 128 transitions. [2019-11-20 03:29:47,619 INFO L463 AbstractCegarLoop]: Interpolant automaton has 69 states. [2019-11-20 03:29:47,619 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 128 transitions. [2019-11-20 03:29:47,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-11-20 03:29:47,619 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:29:47,620 INFO L410 BasicCegarLoop]: trace histogram [35, 34, 18, 17, 1, 1, 1, 1, 1] [2019-11-20 03:29:47,823 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:29:47,823 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:29:47,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:29:47,823 INFO L82 PathProgramCache]: Analyzing trace with hash 796459467, now seen corresponding path program 19 times [2019-11-20 03:29:47,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:29:47,824 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723535454] [2019-11-20 03:29:47,824 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:29:47,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:29:48,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1785 backedges. 918 proven. 442 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2019-11-20 03:29:48,055 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723535454] [2019-11-20 03:29:48,056 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727114485] [2019-11-20 03:29:48,056 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:29:48,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:29:48,110 INFO L255 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-20 03:29:48,112 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:29:48,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1785 backedges. 918 proven. 442 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2019-11-20 03:29:48,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:29:48,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2019-11-20 03:29:48,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781845267] [2019-11-20 03:29:48,128 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-20 03:29:48,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:29:48,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-20 03:29:48,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-20 03:29:48,129 INFO L87 Difference]: Start difference. First operand 110 states and 128 transitions. Second operand 20 states. [2019-11-20 03:29:48,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:29:48,184 INFO L93 Difference]: Finished difference Result 173 states and 210 transitions. [2019-11-20 03:29:48,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-20 03:29:48,185 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 109 [2019-11-20 03:29:48,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:29:48,186 INFO L225 Difference]: With dead ends: 173 [2019-11-20 03:29:48,186 INFO L226 Difference]: Without dead ends: 114 [2019-11-20 03:29:48,187 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-20 03:29:48,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-11-20 03:29:48,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2019-11-20 03:29:48,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-11-20 03:29:48,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 131 transitions. [2019-11-20 03:29:48,190 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 131 transitions. Word has length 109 [2019-11-20 03:29:48,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:29:48,191 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 131 transitions. [2019-11-20 03:29:48,191 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-20 03:29:48,191 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 131 transitions. [2019-11-20 03:29:48,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-11-20 03:29:48,191 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:29:48,191 INFO L410 BasicCegarLoop]: trace histogram [36, 35, 18, 18, 1, 1, 1, 1, 1] [2019-11-20 03:29:48,394 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:29:48,394 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:29:48,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:29:48,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1597767235, now seen corresponding path program 20 times [2019-11-20 03:29:48,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:29:48,395 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629290908] [2019-11-20 03:29:48,395 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:29:48,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:29:48,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 0 proven. 1395 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2019-11-20 03:29:48,614 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629290908] [2019-11-20 03:29:48,614 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299502286] [2019-11-20 03:29:48,614 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:29:48,660 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 03:29:48,660 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:29:48,661 INFO L255 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-20 03:29:48,663 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:29:48,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 970 proven. 495 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2019-11-20 03:29:48,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:29:48,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 40 [2019-11-20 03:29:48,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379066704] [2019-11-20 03:29:48,998 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-11-20 03:29:48,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:29:48,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-11-20 03:29:48,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=1236, Unknown=0, NotChecked=0, Total=1640 [2019-11-20 03:29:48,999 INFO L87 Difference]: Start difference. First operand 113 states and 131 transitions. Second operand 41 states. [2019-11-20 03:29:49,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:29:49,991 INFO L93 Difference]: Finished difference Result 488 states and 635 transitions. [2019-11-20 03:29:49,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2019-11-20 03:29:49,992 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 112 [2019-11-20 03:29:49,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:29:49,994 INFO L225 Difference]: With dead ends: 488 [2019-11-20 03:29:49,994 INFO L226 Difference]: Without dead ends: 429 [2019-11-20 03:29:49,995 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1292 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1493, Invalid=4987, Unknown=0, NotChecked=0, Total=6480 [2019-11-20 03:29:49,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2019-11-20 03:29:50,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 146. [2019-11-20 03:29:50,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-11-20 03:29:50,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 174 transitions. [2019-11-20 03:29:50,005 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 174 transitions. Word has length 112 [2019-11-20 03:29:50,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:29:50,006 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 174 transitions. [2019-11-20 03:29:50,006 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-11-20 03:29:50,006 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 174 transitions. [2019-11-20 03:29:50,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-11-20 03:29:50,007 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:29:50,007 INFO L410 BasicCegarLoop]: trace histogram [38, 37, 19, 19, 1, 1, 1, 1, 1] [2019-11-20 03:29:50,210 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:29:50,210 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:29:50,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:29:50,211 INFO L82 PathProgramCache]: Analyzing trace with hash -244187009, now seen corresponding path program 21 times [2019-11-20 03:29:50,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:29:50,211 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270731427] [2019-11-20 03:29:50,211 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:29:50,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:29:50,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2109 backedges. 0 proven. 1558 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2019-11-20 03:29:50,527 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270731427] [2019-11-20 03:29:50,527 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185469655] [2019-11-20 03:29:50,527 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:29:50,614 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 38 check-sat command(s) [2019-11-20 03:29:50,614 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:29:50,616 INFO L255 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-20 03:29:50,618 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:29:51,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2109 backedges. 1046 proven. 1009 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2019-11-20 03:29:51,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:29:51,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 42 [2019-11-20 03:29:51,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448038303] [2019-11-20 03:29:51,164 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-20 03:29:51,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:29:51,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-20 03:29:51,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=825, Invalid=981, Unknown=0, NotChecked=0, Total=1806 [2019-11-20 03:29:51,165 INFO L87 Difference]: Start difference. First operand 146 states and 174 transitions. Second operand 43 states. [2019-11-20 03:29:52,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:29:52,181 INFO L93 Difference]: Finished difference Result 914 states and 1216 transitions. [2019-11-20 03:29:52,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2019-11-20 03:29:52,181 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 118 [2019-11-20 03:29:52,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:29:52,186 INFO L225 Difference]: With dead ends: 914 [2019-11-20 03:29:52,186 INFO L226 Difference]: Without dead ends: 910 [2019-11-20 03:29:52,187 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2095, Invalid=4877, Unknown=0, NotChecked=0, Total=6972 [2019-11-20 03:29:52,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2019-11-20 03:29:52,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 182. [2019-11-20 03:29:52,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2019-11-20 03:29:52,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 222 transitions. [2019-11-20 03:29:52,203 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 222 transitions. Word has length 118 [2019-11-20 03:29:52,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:29:52,204 INFO L462 AbstractCegarLoop]: Abstraction has 182 states and 222 transitions. [2019-11-20 03:29:52,204 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-20 03:29:52,204 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 222 transitions. [2019-11-20 03:29:52,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-11-20 03:29:52,205 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:29:52,206 INFO L410 BasicCegarLoop]: trace histogram [59, 58, 40, 19, 1, 1, 1, 1, 1] [2019-11-20 03:29:52,409 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:29:52,409 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:29:52,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:29:52,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1086178059, now seen corresponding path program 22 times [2019-11-20 03:29:52,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:29:52,410 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929803061] [2019-11-20 03:29:52,410 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:29:52,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:29:54,420 INFO L134 CoverageAnalysis]: Checked inductivity of 5133 backedges. 2321 proven. 2812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:29:54,420 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929803061] [2019-11-20 03:29:54,420 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560145863] [2019-11-20 03:29:54,420 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:29:54,485 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 03:29:54,485 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:29:54,486 INFO L255 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-20 03:29:54,488 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:29:55,305 INFO L134 CoverageAnalysis]: Checked inductivity of 5133 backedges. 2320 proven. 551 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2019-11-20 03:29:55,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:29:55,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 21] total 99 [2019-11-20 03:29:55,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733238011] [2019-11-20 03:29:55,306 INFO L442 AbstractCegarLoop]: Interpolant automaton has 100 states [2019-11-20 03:29:55,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:29:55,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2019-11-20 03:29:55,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1869, Invalid=8031, Unknown=0, NotChecked=0, Total=9900 [2019-11-20 03:29:55,307 INFO L87 Difference]: Start difference. First operand 182 states and 222 transitions. Second operand 100 states. [2019-11-20 03:29:56,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:29:56,688 INFO L93 Difference]: Finished difference Result 311 states and 392 transitions. [2019-11-20 03:29:56,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-20 03:29:56,688 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 181 [2019-11-20 03:29:56,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:29:56,690 INFO L225 Difference]: With dead ends: 311 [2019-11-20 03:29:56,690 INFO L226 Difference]: Without dead ends: 186 [2019-11-20 03:29:56,691 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5225 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3887, Invalid=15295, Unknown=0, NotChecked=0, Total=19182 [2019-11-20 03:29:56,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2019-11-20 03:29:56,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2019-11-20 03:29:56,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2019-11-20 03:29:56,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 225 transitions. [2019-11-20 03:29:56,702 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 225 transitions. Word has length 181 [2019-11-20 03:29:56,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:29:56,702 INFO L462 AbstractCegarLoop]: Abstraction has 185 states and 225 transitions. [2019-11-20 03:29:56,702 INFO L463 AbstractCegarLoop]: Interpolant automaton has 100 states. [2019-11-20 03:29:56,702 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 225 transitions. [2019-11-20 03:29:56,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2019-11-20 03:29:56,703 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:29:56,704 INFO L410 BasicCegarLoop]: trace histogram [60, 59, 40, 20, 1, 1, 1, 1, 1] [2019-11-20 03:29:56,907 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:29:56,908 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:29:56,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:29:56,908 INFO L82 PathProgramCache]: Analyzing trace with hash 2086805757, now seen corresponding path program 23 times [2019-11-20 03:29:56,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:29:56,908 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282836338] [2019-11-20 03:29:56,909 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:29:56,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:29:59,241 INFO L134 CoverageAnalysis]: Checked inductivity of 5310 backedges. 2324 proven. 2986 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:29:59,242 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282836338] [2019-11-20 03:29:59,242 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704764591] [2019-11-20 03:29:59,242 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:29:59,349 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2019-11-20 03:29:59,349 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:29:59,351 INFO L255 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-20 03:29:59,353 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:30:00,255 INFO L134 CoverageAnalysis]: Checked inductivity of 5310 backedges. 2438 proven. 610 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2019-11-20 03:30:00,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:30:00,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 22] total 102 [2019-11-20 03:30:00,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584610285] [2019-11-20 03:30:00,256 INFO L442 AbstractCegarLoop]: Interpolant automaton has 103 states [2019-11-20 03:30:00,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:30:00,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2019-11-20 03:30:00,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1974, Invalid=8532, Unknown=0, NotChecked=0, Total=10506 [2019-11-20 03:30:00,257 INFO L87 Difference]: Start difference. First operand 185 states and 225 transitions. Second operand 103 states. [2019-11-20 03:30:01,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:30:01,519 INFO L93 Difference]: Finished difference Result 314 states and 395 transitions. [2019-11-20 03:30:01,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-11-20 03:30:01,526 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 184 [2019-11-20 03:30:01,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:30:01,527 INFO L225 Difference]: With dead ends: 314 [2019-11-20 03:30:01,528 INFO L226 Difference]: Without dead ends: 189 [2019-11-20 03:30:01,528 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5576 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=4198, Invalid=16394, Unknown=0, NotChecked=0, Total=20592 [2019-11-20 03:30:01,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-11-20 03:30:01,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2019-11-20 03:30:01,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2019-11-20 03:30:01,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 228 transitions. [2019-11-20 03:30:01,539 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 228 transitions. Word has length 184 [2019-11-20 03:30:01,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:30:01,540 INFO L462 AbstractCegarLoop]: Abstraction has 188 states and 228 transitions. [2019-11-20 03:30:01,541 INFO L463 AbstractCegarLoop]: Interpolant automaton has 103 states. [2019-11-20 03:30:01,541 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 228 transitions. [2019-11-20 03:30:01,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2019-11-20 03:30:01,542 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:30:01,542 INFO L410 BasicCegarLoop]: trace histogram [61, 60, 40, 21, 1, 1, 1, 1, 1] [2019-11-20 03:30:01,746 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:30:01,746 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:30:01,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:30:01,746 INFO L82 PathProgramCache]: Analyzing trace with hash 418555339, now seen corresponding path program 24 times [2019-11-20 03:30:01,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:30:01,747 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344737153] [2019-11-20 03:30:01,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:30:01,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:30:04,097 INFO L134 CoverageAnalysis]: Checked inductivity of 5490 backedges. 2327 proven. 3163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:30:04,098 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344737153] [2019-11-20 03:30:04,098 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215977841] [2019-11-20 03:30:04,098 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:30:04,239 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2019-11-20 03:30:04,239 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:30:04,242 INFO L255 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 62 conjunts are in the unsatisfiable core [2019-11-20 03:30:04,245 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:30:05,140 INFO L134 CoverageAnalysis]: Checked inductivity of 5490 backedges. 4146 proven. 1282 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2019-11-20 03:30:05,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:30:05,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 41] total 113 [2019-11-20 03:30:05,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280805085] [2019-11-20 03:30:05,142 INFO L442 AbstractCegarLoop]: Interpolant automaton has 114 states [2019-11-20 03:30:05,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:30:05,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2019-11-20 03:30:05,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3474, Invalid=9408, Unknown=0, NotChecked=0, Total=12882 [2019-11-20 03:30:05,143 INFO L87 Difference]: Start difference. First operand 188 states and 228 transitions. Second operand 114 states. [2019-11-20 03:30:06,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:30:06,616 INFO L93 Difference]: Finished difference Result 317 states and 398 transitions. [2019-11-20 03:30:06,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-11-20 03:30:06,617 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 187 [2019-11-20 03:30:06,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:30:06,618 INFO L225 Difference]: With dead ends: 317 [2019-11-20 03:30:06,618 INFO L226 Difference]: Without dead ends: 191 [2019-11-20 03:30:06,619 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8473 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5930, Invalid=18876, Unknown=0, NotChecked=0, Total=24806 [2019-11-20 03:30:06,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-11-20 03:30:06,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2019-11-20 03:30:06,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2019-11-20 03:30:06,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 231 transitions. [2019-11-20 03:30:06,630 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 231 transitions. Word has length 187 [2019-11-20 03:30:06,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:30:06,631 INFO L462 AbstractCegarLoop]: Abstraction has 191 states and 231 transitions. [2019-11-20 03:30:06,631 INFO L463 AbstractCegarLoop]: Interpolant automaton has 114 states. [2019-11-20 03:30:06,631 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 231 transitions. [2019-11-20 03:30:06,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2019-11-20 03:30:06,632 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:30:06,632 INFO L410 BasicCegarLoop]: trace histogram [62, 61, 40, 22, 1, 1, 1, 1, 1] [2019-11-20 03:30:06,835 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:30:06,836 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:30:06,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:30:06,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1363065283, now seen corresponding path program 25 times [2019-11-20 03:30:06,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:30:06,836 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054014561] [2019-11-20 03:30:06,837 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:30:06,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:30:09,740 INFO L134 CoverageAnalysis]: Checked inductivity of 5673 backedges. 2330 proven. 3343 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:30:09,740 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054014561] [2019-11-20 03:30:09,740 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675035660] [2019-11-20 03:30:09,740 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:30:09,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:30:09,809 INFO L255 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-20 03:30:09,811 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:30:10,840 INFO L134 CoverageAnalysis]: Checked inductivity of 5673 backedges. 2674 proven. 737 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2019-11-20 03:30:10,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:30:10,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 24] total 108 [2019-11-20 03:30:10,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121904840] [2019-11-20 03:30:10,841 INFO L442 AbstractCegarLoop]: Interpolant automaton has 109 states [2019-11-20 03:30:10,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:30:10,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2019-11-20 03:30:10,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2199, Invalid=9573, Unknown=0, NotChecked=0, Total=11772 [2019-11-20 03:30:10,842 INFO L87 Difference]: Start difference. First operand 191 states and 231 transitions. Second operand 109 states. [2019-11-20 03:30:12,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:30:12,224 INFO L93 Difference]: Finished difference Result 320 states and 401 transitions. [2019-11-20 03:30:12,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-11-20 03:30:12,224 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 190 [2019-11-20 03:30:12,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:30:12,225 INFO L225 Difference]: With dead ends: 320 [2019-11-20 03:30:12,225 INFO L226 Difference]: Without dead ends: 195 [2019-11-20 03:30:12,226 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6302 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=4865, Invalid=18697, Unknown=0, NotChecked=0, Total=23562 [2019-11-20 03:30:12,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-11-20 03:30:12,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2019-11-20 03:30:12,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2019-11-20 03:30:12,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 234 transitions. [2019-11-20 03:30:12,238 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 234 transitions. Word has length 190 [2019-11-20 03:30:12,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:30:12,238 INFO L462 AbstractCegarLoop]: Abstraction has 194 states and 234 transitions. [2019-11-20 03:30:12,238 INFO L463 AbstractCegarLoop]: Interpolant automaton has 109 states. [2019-11-20 03:30:12,238 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 234 transitions. [2019-11-20 03:30:12,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2019-11-20 03:30:12,239 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:30:12,239 INFO L410 BasicCegarLoop]: trace histogram [63, 62, 40, 23, 1, 1, 1, 1, 1] [2019-11-20 03:30:12,442 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:30:12,442 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:30:12,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:30:12,443 INFO L82 PathProgramCache]: Analyzing trace with hash -417171317, now seen corresponding path program 26 times [2019-11-20 03:30:12,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:30:12,443 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225686942] [2019-11-20 03:30:12,443 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:30:12,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:30:14,821 INFO L134 CoverageAnalysis]: Checked inductivity of 5859 backedges. 2333 proven. 3526 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:30:14,821 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225686942] [2019-11-20 03:30:14,822 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378023324] [2019-11-20 03:30:14,822 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:30:14,892 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 03:30:14,892 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:30:14,893 INFO L255 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-20 03:30:14,895 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:30:15,976 INFO L134 CoverageAnalysis]: Checked inductivity of 5859 backedges. 2792 proven. 805 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2019-11-20 03:30:15,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:30:15,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 25] total 111 [2019-11-20 03:30:15,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895282825] [2019-11-20 03:30:15,977 INFO L442 AbstractCegarLoop]: Interpolant automaton has 112 states [2019-11-20 03:30:15,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:30:15,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2019-11-20 03:30:15,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2319, Invalid=10113, Unknown=0, NotChecked=0, Total=12432 [2019-11-20 03:30:15,978 INFO L87 Difference]: Start difference. First operand 194 states and 234 transitions. Second operand 112 states. [2019-11-20 03:30:17,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:30:17,460 INFO L93 Difference]: Finished difference Result 323 states and 404 transitions. [2019-11-20 03:30:17,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-11-20 03:30:17,460 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 193 [2019-11-20 03:30:17,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:30:17,461 INFO L225 Difference]: With dead ends: 323 [2019-11-20 03:30:17,462 INFO L226 Difference]: Without dead ends: 198 [2019-11-20 03:30:17,463 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6677 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=5221, Invalid=19901, Unknown=0, NotChecked=0, Total=25122 [2019-11-20 03:30:17,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2019-11-20 03:30:17,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 197. [2019-11-20 03:30:17,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2019-11-20 03:30:17,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 237 transitions. [2019-11-20 03:30:17,475 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 237 transitions. Word has length 193 [2019-11-20 03:30:17,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:30:17,475 INFO L462 AbstractCegarLoop]: Abstraction has 197 states and 237 transitions. [2019-11-20 03:30:17,475 INFO L463 AbstractCegarLoop]: Interpolant automaton has 112 states. [2019-11-20 03:30:17,475 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 237 transitions. [2019-11-20 03:30:17,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2019-11-20 03:30:17,476 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:30:17,477 INFO L410 BasicCegarLoop]: trace histogram [64, 63, 40, 24, 1, 1, 1, 1, 1] [2019-11-20 03:30:17,680 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:30:17,680 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:30:17,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:30:17,680 INFO L82 PathProgramCache]: Analyzing trace with hash -570459267, now seen corresponding path program 27 times [2019-11-20 03:30:17,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:30:17,680 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017967534] [2019-11-20 03:30:17,681 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:30:17,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:30:20,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6048 backedges. 2336 proven. 3712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:30:20,671 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017967534] [2019-11-20 03:30:20,671 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611937910] [2019-11-20 03:30:20,671 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:30:20,825 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2019-11-20 03:30:20,825 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:30:20,827 INFO L255 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 65 conjunts are in the unsatisfiable core [2019-11-20 03:30:20,829 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:30:21,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6048 backedges. 4296 proven. 1681 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-11-20 03:30:21,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:30:21,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 41] total 116 [2019-11-20 03:30:21,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315483337] [2019-11-20 03:30:21,721 INFO L442 AbstractCegarLoop]: Interpolant automaton has 117 states [2019-11-20 03:30:21,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:30:21,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2019-11-20 03:30:21,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3552, Invalid=10020, Unknown=0, NotChecked=0, Total=13572 [2019-11-20 03:30:21,723 INFO L87 Difference]: Start difference. First operand 197 states and 237 transitions. Second operand 117 states. [2019-11-20 03:30:23,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:30:23,417 INFO L93 Difference]: Finished difference Result 326 states and 407 transitions. [2019-11-20 03:30:23,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-11-20 03:30:23,417 INFO L78 Accepts]: Start accepts. Automaton has 117 states. Word has length 196 [2019-11-20 03:30:23,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:30:23,419 INFO L225 Difference]: With dead ends: 326 [2019-11-20 03:30:23,419 INFO L226 Difference]: Without dead ends: 200 [2019-11-20 03:30:23,420 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8536 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=6710, Invalid=21012, Unknown=0, NotChecked=0, Total=27722 [2019-11-20 03:30:23,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2019-11-20 03:30:23,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2019-11-20 03:30:23,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2019-11-20 03:30:23,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 240 transitions. [2019-11-20 03:30:23,432 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 240 transitions. Word has length 196 [2019-11-20 03:30:23,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:30:23,432 INFO L462 AbstractCegarLoop]: Abstraction has 200 states and 240 transitions. [2019-11-20 03:30:23,432 INFO L463 AbstractCegarLoop]: Interpolant automaton has 117 states. [2019-11-20 03:30:23,432 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 240 transitions. [2019-11-20 03:30:23,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2019-11-20 03:30:23,433 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:30:23,434 INFO L410 BasicCegarLoop]: trace histogram [65, 64, 40, 25, 1, 1, 1, 1, 1] [2019-11-20 03:30:23,637 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:30:23,637 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:30:23,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:30:23,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1621542069, now seen corresponding path program 28 times [2019-11-20 03:30:23,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:30:23,638 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448447214] [2019-11-20 03:30:23,638 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:30:23,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:30:26,449 INFO L134 CoverageAnalysis]: Checked inductivity of 6240 backedges. 2339 proven. 3901 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:30:26,449 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448447214] [2019-11-20 03:30:26,449 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947339470] [2019-11-20 03:30:26,450 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:30:26,524 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 03:30:26,524 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:30:26,525 INFO L255 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-20 03:30:26,532 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:30:27,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6240 backedges. 3028 proven. 950 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2019-11-20 03:30:27,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:30:27,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 27] total 117 [2019-11-20 03:30:27,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693307431] [2019-11-20 03:30:27,803 INFO L442 AbstractCegarLoop]: Interpolant automaton has 118 states [2019-11-20 03:30:27,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:30:27,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2019-11-20 03:30:27,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2574, Invalid=11232, Unknown=0, NotChecked=0, Total=13806 [2019-11-20 03:30:27,805 INFO L87 Difference]: Start difference. First operand 200 states and 240 transitions. Second operand 118 states. [2019-11-20 03:30:29,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:30:29,516 INFO L93 Difference]: Finished difference Result 329 states and 410 transitions. [2019-11-20 03:30:29,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2019-11-20 03:30:29,517 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 199 [2019-11-20 03:30:29,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:30:29,518 INFO L225 Difference]: With dead ends: 329 [2019-11-20 03:30:29,518 INFO L226 Difference]: Without dead ends: 204 [2019-11-20 03:30:29,519 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7451 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=5978, Invalid=22414, Unknown=0, NotChecked=0, Total=28392 [2019-11-20 03:30:29,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2019-11-20 03:30:29,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 203. [2019-11-20 03:30:29,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2019-11-20 03:30:29,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 243 transitions. [2019-11-20 03:30:29,531 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 243 transitions. Word has length 199 [2019-11-20 03:30:29,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:30:29,532 INFO L462 AbstractCegarLoop]: Abstraction has 203 states and 243 transitions. [2019-11-20 03:30:29,532 INFO L463 AbstractCegarLoop]: Interpolant automaton has 118 states. [2019-11-20 03:30:29,532 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 243 transitions. [2019-11-20 03:30:29,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2019-11-20 03:30:29,533 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:30:29,533 INFO L410 BasicCegarLoop]: trace histogram [66, 65, 40, 26, 1, 1, 1, 1, 1] [2019-11-20 03:30:29,737 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:30:29,738 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:30:29,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:30:29,738 INFO L82 PathProgramCache]: Analyzing trace with hash 177258685, now seen corresponding path program 29 times [2019-11-20 03:30:29,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:30:29,738 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650846791] [2019-11-20 03:30:29,738 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:30:29,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:30:32,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6435 backedges. 2342 proven. 4093 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:30:32,662 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650846791] [2019-11-20 03:30:32,662 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642618617] [2019-11-20 03:30:32,662 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:30:32,776 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2019-11-20 03:30:32,776 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:30:32,778 INFO L255 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-20 03:30:32,780 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:30:34,508 INFO L134 CoverageAnalysis]: Checked inductivity of 6435 backedges. 3146 proven. 1027 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2019-11-20 03:30:34,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:30:34,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 28] total 120 [2019-11-20 03:30:34,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35812159] [2019-11-20 03:30:34,509 INFO L442 AbstractCegarLoop]: Interpolant automaton has 121 states [2019-11-20 03:30:34,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:30:34,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2019-11-20 03:30:34,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2709, Invalid=11811, Unknown=0, NotChecked=0, Total=14520 [2019-11-20 03:30:34,510 INFO L87 Difference]: Start difference. First operand 203 states and 243 transitions. Second operand 121 states. [2019-11-20 03:30:36,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:30:36,472 INFO L93 Difference]: Finished difference Result 332 states and 413 transitions. [2019-11-20 03:30:36,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2019-11-20 03:30:36,473 INFO L78 Accepts]: Start accepts. Automaton has 121 states. Word has length 202 [2019-11-20 03:30:36,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:30:36,474 INFO L225 Difference]: With dead ends: 332 [2019-11-20 03:30:36,474 INFO L226 Difference]: Without dead ends: 207 [2019-11-20 03:30:36,475 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7846 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=6383, Invalid=23719, Unknown=0, NotChecked=0, Total=30102 [2019-11-20 03:30:36,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2019-11-20 03:30:36,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 206. [2019-11-20 03:30:36,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2019-11-20 03:30:36,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 246 transitions. [2019-11-20 03:30:36,488 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 246 transitions. Word has length 202 [2019-11-20 03:30:36,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:30:36,489 INFO L462 AbstractCegarLoop]: Abstraction has 206 states and 246 transitions. [2019-11-20 03:30:36,489 INFO L463 AbstractCegarLoop]: Interpolant automaton has 121 states. [2019-11-20 03:30:36,489 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 246 transitions. [2019-11-20 03:30:36,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2019-11-20 03:30:36,490 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:30:36,490 INFO L410 BasicCegarLoop]: trace histogram [67, 66, 40, 27, 1, 1, 1, 1, 1] [2019-11-20 03:30:36,693 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:30:36,694 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:30:36,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:30:36,694 INFO L82 PathProgramCache]: Analyzing trace with hash -56431093, now seen corresponding path program 30 times [2019-11-20 03:30:36,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:30:36,694 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527086201] [2019-11-20 03:30:36,694 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:30:36,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:30:39,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6633 backedges. 2345 proven. 4288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:30:39,519 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527086201] [2019-11-20 03:30:39,519 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096269831] [2019-11-20 03:30:39,519 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:30:39,647 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2019-11-20 03:30:39,647 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:30:39,649 INFO L255 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-20 03:30:39,651 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:30:41,058 INFO L134 CoverageAnalysis]: Checked inductivity of 6633 backedges. 3264 proven. 1107 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2019-11-20 03:30:41,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:30:41,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 29] total 123 [2019-11-20 03:30:41,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018511806] [2019-11-20 03:30:41,060 INFO L442 AbstractCegarLoop]: Interpolant automaton has 124 states [2019-11-20 03:30:41,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:30:41,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2019-11-20 03:30:41,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2849, Invalid=12403, Unknown=0, NotChecked=0, Total=15252 [2019-11-20 03:30:41,061 INFO L87 Difference]: Start difference. First operand 206 states and 246 transitions. Second operand 124 states. [2019-11-20 03:30:43,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:30:43,089 INFO L93 Difference]: Finished difference Result 335 states and 416 transitions. [2019-11-20 03:30:43,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2019-11-20 03:30:43,090 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 205 [2019-11-20 03:30:43,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:30:43,091 INFO L225 Difference]: With dead ends: 335 [2019-11-20 03:30:43,091 INFO L226 Difference]: Without dead ends: 210 [2019-11-20 03:30:43,092 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8241 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=6811, Invalid=25051, Unknown=0, NotChecked=0, Total=31862 [2019-11-20 03:30:43,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2019-11-20 03:30:43,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2019-11-20 03:30:43,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2019-11-20 03:30:43,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 249 transitions. [2019-11-20 03:30:43,104 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 249 transitions. Word has length 205 [2019-11-20 03:30:43,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:30:43,104 INFO L462 AbstractCegarLoop]: Abstraction has 209 states and 249 transitions. [2019-11-20 03:30:43,104 INFO L463 AbstractCegarLoop]: Interpolant automaton has 124 states. [2019-11-20 03:30:43,104 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 249 transitions. [2019-11-20 03:30:43,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2019-11-20 03:30:43,105 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:30:43,105 INFO L410 BasicCegarLoop]: trace histogram [68, 67, 40, 28, 1, 1, 1, 1, 1] [2019-11-20 03:30:43,306 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:30:43,306 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:30:43,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:30:43,307 INFO L82 PathProgramCache]: Analyzing trace with hash 233379325, now seen corresponding path program 31 times [2019-11-20 03:30:43,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:30:43,307 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761667569] [2019-11-20 03:30:43,307 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:30:43,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:30:46,243 INFO L134 CoverageAnalysis]: Checked inductivity of 6834 backedges. 2348 proven. 4486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:30:46,243 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761667569] [2019-11-20 03:30:46,244 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035888442] [2019-11-20 03:30:46,244 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:30:46,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:30:46,313 INFO L255 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-20 03:30:46,315 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:30:47,831 INFO L134 CoverageAnalysis]: Checked inductivity of 6834 backedges. 3382 proven. 1190 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2019-11-20 03:30:47,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:30:47,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 30] total 126 [2019-11-20 03:30:47,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306970537] [2019-11-20 03:30:47,832 INFO L442 AbstractCegarLoop]: Interpolant automaton has 127 states [2019-11-20 03:30:47,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:30:47,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2019-11-20 03:30:47,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2994, Invalid=13008, Unknown=0, NotChecked=0, Total=16002 [2019-11-20 03:30:47,834 INFO L87 Difference]: Start difference. First operand 209 states and 249 transitions. Second operand 127 states. [2019-11-20 03:30:49,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:30:49,945 INFO L93 Difference]: Finished difference Result 338 states and 419 transitions. [2019-11-20 03:30:49,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2019-11-20 03:30:49,946 INFO L78 Accepts]: Start accepts. Automaton has 127 states. Word has length 208 [2019-11-20 03:30:49,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:30:49,947 INFO L225 Difference]: With dead ends: 338 [2019-11-20 03:30:49,947 INFO L226 Difference]: Without dead ends: 213 [2019-11-20 03:30:49,948 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8636 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=7262, Invalid=26410, Unknown=0, NotChecked=0, Total=33672 [2019-11-20 03:30:49,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2019-11-20 03:30:49,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 212. [2019-11-20 03:30:49,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2019-11-20 03:30:49,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 252 transitions. [2019-11-20 03:30:49,960 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 252 transitions. Word has length 208 [2019-11-20 03:30:49,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:30:49,961 INFO L462 AbstractCegarLoop]: Abstraction has 212 states and 252 transitions. [2019-11-20 03:30:49,961 INFO L463 AbstractCegarLoop]: Interpolant automaton has 127 states. [2019-11-20 03:30:49,961 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 252 transitions. [2019-11-20 03:30:49,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2019-11-20 03:30:49,962 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:30:49,962 INFO L410 BasicCegarLoop]: trace histogram [69, 68, 40, 29, 1, 1, 1, 1, 1] [2019-11-20 03:30:50,166 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:30:50,167 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:30:50,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:30:50,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1091277003, now seen corresponding path program 32 times [2019-11-20 03:30:50,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:30:50,168 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486724239] [2019-11-20 03:30:50,168 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:30:50,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:30:53,236 INFO L134 CoverageAnalysis]: Checked inductivity of 7038 backedges. 2351 proven. 4687 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:30:53,236 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486724239] [2019-11-20 03:30:53,236 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106322772] [2019-11-20 03:30:53,237 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:30:53,311 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 03:30:53,311 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:30:53,312 INFO L255 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-20 03:30:53,315 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:30:54,922 INFO L134 CoverageAnalysis]: Checked inductivity of 7038 backedges. 3500 proven. 1276 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2019-11-20 03:30:54,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:30:54,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 31] total 129 [2019-11-20 03:30:54,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648147274] [2019-11-20 03:30:54,923 INFO L442 AbstractCegarLoop]: Interpolant automaton has 130 states [2019-11-20 03:30:54,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:30:54,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2019-11-20 03:30:54,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3144, Invalid=13626, Unknown=0, NotChecked=0, Total=16770 [2019-11-20 03:30:54,925 INFO L87 Difference]: Start difference. First operand 212 states and 252 transitions. Second operand 130 states. [2019-11-20 03:30:57,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:30:57,198 INFO L93 Difference]: Finished difference Result 341 states and 422 transitions. [2019-11-20 03:30:57,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2019-11-20 03:30:57,198 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 211 [2019-11-20 03:30:57,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:30:57,199 INFO L225 Difference]: With dead ends: 341 [2019-11-20 03:30:57,199 INFO L226 Difference]: Without dead ends: 216 [2019-11-20 03:30:57,201 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9031 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=7736, Invalid=27796, Unknown=0, NotChecked=0, Total=35532 [2019-11-20 03:30:57,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2019-11-20 03:30:57,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 215. [2019-11-20 03:30:57,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2019-11-20 03:30:57,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 255 transitions. [2019-11-20 03:30:57,212 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 255 transitions. Word has length 211 [2019-11-20 03:30:57,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:30:57,213 INFO L462 AbstractCegarLoop]: Abstraction has 215 states and 255 transitions. [2019-11-20 03:30:57,213 INFO L463 AbstractCegarLoop]: Interpolant automaton has 130 states. [2019-11-20 03:30:57,213 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 255 transitions. [2019-11-20 03:30:57,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2019-11-20 03:30:57,214 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:30:57,215 INFO L410 BasicCegarLoop]: trace histogram [70, 69, 40, 30, 1, 1, 1, 1, 1] [2019-11-20 03:30:57,417 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:30:57,418 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:30:57,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:30:57,418 INFO L82 PathProgramCache]: Analyzing trace with hash -629376195, now seen corresponding path program 33 times [2019-11-20 03:30:57,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:30:57,418 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368530571] [2019-11-20 03:30:57,418 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:30:57,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:31:00,855 INFO L134 CoverageAnalysis]: Checked inductivity of 7245 backedges. 2354 proven. 4891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:31:00,855 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368530571] [2019-11-20 03:31:00,855 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66662627] [2019-11-20 03:31:00,855 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:31:00,977 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2019-11-20 03:31:00,977 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:31:00,979 INFO L255 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-20 03:31:00,980 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:31:02,689 INFO L134 CoverageAnalysis]: Checked inductivity of 7245 backedges. 3618 proven. 1365 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2019-11-20 03:31:02,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:31:02,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 32] total 132 [2019-11-20 03:31:02,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723332877] [2019-11-20 03:31:02,690 INFO L442 AbstractCegarLoop]: Interpolant automaton has 133 states [2019-11-20 03:31:02,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:31:02,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2019-11-20 03:31:02,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3299, Invalid=14257, Unknown=0, NotChecked=0, Total=17556 [2019-11-20 03:31:02,691 INFO L87 Difference]: Start difference. First operand 215 states and 255 transitions. Second operand 133 states. [2019-11-20 03:31:05,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:31:05,071 INFO L93 Difference]: Finished difference Result 344 states and 425 transitions. [2019-11-20 03:31:05,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2019-11-20 03:31:05,071 INFO L78 Accepts]: Start accepts. Automaton has 133 states. Word has length 214 [2019-11-20 03:31:05,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:31:05,072 INFO L225 Difference]: With dead ends: 344 [2019-11-20 03:31:05,072 INFO L226 Difference]: Without dead ends: 219 [2019-11-20 03:31:05,074 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9426 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=8233, Invalid=29209, Unknown=0, NotChecked=0, Total=37442 [2019-11-20 03:31:05,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2019-11-20 03:31:05,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 218. [2019-11-20 03:31:05,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2019-11-20 03:31:05,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 258 transitions. [2019-11-20 03:31:05,085 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 258 transitions. Word has length 214 [2019-11-20 03:31:05,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:31:05,085 INFO L462 AbstractCegarLoop]: Abstraction has 218 states and 258 transitions. [2019-11-20 03:31:05,085 INFO L463 AbstractCegarLoop]: Interpolant automaton has 133 states. [2019-11-20 03:31:05,085 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 258 transitions. [2019-11-20 03:31:05,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2019-11-20 03:31:05,086 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:31:05,086 INFO L410 BasicCegarLoop]: trace histogram [71, 70, 40, 31, 1, 1, 1, 1, 1] [2019-11-20 03:31:05,286 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:31:05,287 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:31:05,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:31:05,287 INFO L82 PathProgramCache]: Analyzing trace with hash -174120053, now seen corresponding path program 34 times [2019-11-20 03:31:05,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:31:05,287 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859331375] [2019-11-20 03:31:05,287 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:31:05,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:31:08,571 INFO L134 CoverageAnalysis]: Checked inductivity of 7455 backedges. 2357 proven. 5098 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:31:08,572 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859331375] [2019-11-20 03:31:08,572 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816205168] [2019-11-20 03:31:08,572 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:31:08,643 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 03:31:08,643 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:31:08,645 INFO L255 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 33 conjunts are in the unsatisfiable core [2019-11-20 03:31:08,646 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:31:10,758 INFO L134 CoverageAnalysis]: Checked inductivity of 7455 backedges. 3736 proven. 1457 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2019-11-20 03:31:10,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:31:10,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 33] total 135 [2019-11-20 03:31:10,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390924313] [2019-11-20 03:31:10,759 INFO L442 AbstractCegarLoop]: Interpolant automaton has 136 states [2019-11-20 03:31:10,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:31:10,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2019-11-20 03:31:10,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3459, Invalid=14901, Unknown=0, NotChecked=0, Total=18360 [2019-11-20 03:31:10,761 INFO L87 Difference]: Start difference. First operand 218 states and 258 transitions. Second operand 136 states. [2019-11-20 03:31:13,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:31:13,314 INFO L93 Difference]: Finished difference Result 347 states and 428 transitions. [2019-11-20 03:31:13,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2019-11-20 03:31:13,314 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 217 [2019-11-20 03:31:13,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:31:13,316 INFO L225 Difference]: With dead ends: 347 [2019-11-20 03:31:13,316 INFO L226 Difference]: Without dead ends: 222 [2019-11-20 03:31:13,317 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9821 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=8753, Invalid=30649, Unknown=0, NotChecked=0, Total=39402 [2019-11-20 03:31:13,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2019-11-20 03:31:13,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 221. [2019-11-20 03:31:13,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2019-11-20 03:31:13,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 261 transitions. [2019-11-20 03:31:13,330 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 261 transitions. Word has length 217 [2019-11-20 03:31:13,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:31:13,331 INFO L462 AbstractCegarLoop]: Abstraction has 221 states and 261 transitions. [2019-11-20 03:31:13,331 INFO L463 AbstractCegarLoop]: Interpolant automaton has 136 states. [2019-11-20 03:31:13,331 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 261 transitions. [2019-11-20 03:31:13,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2019-11-20 03:31:13,332 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:31:13,332 INFO L410 BasicCegarLoop]: trace histogram [72, 71, 40, 32, 1, 1, 1, 1, 1] [2019-11-20 03:31:13,536 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:31:13,536 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:31:13,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:31:13,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1145114499, now seen corresponding path program 35 times [2019-11-20 03:31:13,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:31:13,536 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238939712] [2019-11-20 03:31:13,536 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:31:13,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:31:17,147 INFO L134 CoverageAnalysis]: Checked inductivity of 7668 backedges. 2360 proven. 5308 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:31:17,148 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238939712] [2019-11-20 03:31:17,148 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593826325] [2019-11-20 03:31:17,148 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:31:17,275 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2019-11-20 03:31:17,275 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:31:17,277 INFO L255 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-20 03:31:17,279 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:31:19,099 INFO L134 CoverageAnalysis]: Checked inductivity of 7668 backedges. 3854 proven. 1552 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2019-11-20 03:31:19,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:31:19,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 34] total 138 [2019-11-20 03:31:19,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002212456] [2019-11-20 03:31:19,100 INFO L442 AbstractCegarLoop]: Interpolant automaton has 139 states [2019-11-20 03:31:19,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:31:19,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2019-11-20 03:31:19,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3624, Invalid=15558, Unknown=0, NotChecked=0, Total=19182 [2019-11-20 03:31:19,101 INFO L87 Difference]: Start difference. First operand 221 states and 261 transitions. Second operand 139 states. [2019-11-20 03:31:21,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:31:21,859 INFO L93 Difference]: Finished difference Result 350 states and 431 transitions. [2019-11-20 03:31:21,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2019-11-20 03:31:21,859 INFO L78 Accepts]: Start accepts. Automaton has 139 states. Word has length 220 [2019-11-20 03:31:21,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:31:21,860 INFO L225 Difference]: With dead ends: 350 [2019-11-20 03:31:21,860 INFO L226 Difference]: Without dead ends: 225 [2019-11-20 03:31:21,861 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10216 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=9296, Invalid=32116, Unknown=0, NotChecked=0, Total=41412 [2019-11-20 03:31:21,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2019-11-20 03:31:21,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 224. [2019-11-20 03:31:21,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2019-11-20 03:31:21,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 264 transitions. [2019-11-20 03:31:21,870 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 264 transitions. Word has length 220 [2019-11-20 03:31:21,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:31:21,871 INFO L462 AbstractCegarLoop]: Abstraction has 224 states and 264 transitions. [2019-11-20 03:31:21,871 INFO L463 AbstractCegarLoop]: Interpolant automaton has 139 states. [2019-11-20 03:31:21,871 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 264 transitions. [2019-11-20 03:31:21,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2019-11-20 03:31:21,872 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:31:21,872 INFO L410 BasicCegarLoop]: trace histogram [73, 72, 40, 33, 1, 1, 1, 1, 1] [2019-11-20 03:31:22,072 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:31:22,072 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:31:22,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:31:22,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1435916725, now seen corresponding path program 36 times [2019-11-20 03:31:22,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:31:22,073 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161010451] [2019-11-20 03:31:22,073 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:31:22,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:31:25,673 INFO L134 CoverageAnalysis]: Checked inductivity of 7884 backedges. 2363 proven. 5521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:31:25,673 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161010451] [2019-11-20 03:31:25,674 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26663123] [2019-11-20 03:31:25,674 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:31:25,806 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2019-11-20 03:31:25,806 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:31:25,808 INFO L255 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 74 conjunts are in the unsatisfiable core [2019-11-20 03:31:25,810 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:31:26,535 INFO L134 CoverageAnalysis]: Checked inductivity of 7884 backedges. 4584 proven. 3202 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-11-20 03:31:26,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:31:26,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 41] total 125 [2019-11-20 03:31:26,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791713594] [2019-11-20 03:31:26,536 INFO L442 AbstractCegarLoop]: Interpolant automaton has 126 states [2019-11-20 03:31:26,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:31:26,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2019-11-20 03:31:26,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4056, Invalid=11694, Unknown=0, NotChecked=0, Total=15750 [2019-11-20 03:31:26,537 INFO L87 Difference]: Start difference. First operand 224 states and 264 transitions. Second operand 126 states. [2019-11-20 03:31:53,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:31:53,413 INFO L93 Difference]: Finished difference Result 16136 states and 21407 transitions. [2019-11-20 03:31:53,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 290 states. [2019-11-20 03:31:53,414 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 223 [2019-11-20 03:31:53,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:31:53,470 INFO L225 Difference]: With dead ends: 16136 [2019-11-20 03:31:53,470 INFO L226 Difference]: Without dead ends: 15641 [2019-11-20 03:31:53,476 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 377 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34038 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=32763, Invalid=110499, Unknown=0, NotChecked=0, Total=143262 [2019-11-20 03:31:53,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15641 states. [2019-11-20 03:31:53,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15641 to 2099. [2019-11-20 03:31:53,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2099 states. [2019-11-20 03:31:53,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2099 states to 2099 states and 2771 transitions. [2019-11-20 03:31:53,753 INFO L78 Accepts]: Start accepts. Automaton has 2099 states and 2771 transitions. Word has length 223 [2019-11-20 03:31:53,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:31:53,753 INFO L462 AbstractCegarLoop]: Abstraction has 2099 states and 2771 transitions. [2019-11-20 03:31:53,753 INFO L463 AbstractCegarLoop]: Interpolant automaton has 126 states. [2019-11-20 03:31:53,753 INFO L276 IsEmpty]: Start isEmpty. Operand 2099 states and 2771 transitions. [2019-11-20 03:31:53,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2019-11-20 03:31:53,756 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:31:53,757 INFO L410 BasicCegarLoop]: trace histogram [74, 73, 40, 34, 1, 1, 1, 1, 1] [2019-11-20 03:31:53,960 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:31:53,960 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:31:53,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:31:53,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1775995459, now seen corresponding path program 37 times [2019-11-20 03:31:53,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:31:53,960 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914796710] [2019-11-20 03:31:53,961 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:31:53,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:31:57,748 INFO L134 CoverageAnalysis]: Checked inductivity of 8103 backedges. 2366 proven. 5737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:31:57,748 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914796710] [2019-11-20 03:31:57,749 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610269931] [2019-11-20 03:31:57,749 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:31:57,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:31:57,821 INFO L255 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 36 conjunts are in the unsatisfiable core [2019-11-20 03:31:57,823 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:31:59,891 INFO L134 CoverageAnalysis]: Checked inductivity of 8103 backedges. 4090 proven. 1751 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2019-11-20 03:31:59,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:31:59,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 36] total 144 [2019-11-20 03:31:59,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053794192] [2019-11-20 03:31:59,892 INFO L442 AbstractCegarLoop]: Interpolant automaton has 145 states [2019-11-20 03:31:59,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:31:59,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2019-11-20 03:31:59,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3969, Invalid=16911, Unknown=0, NotChecked=0, Total=20880 [2019-11-20 03:31:59,893 INFO L87 Difference]: Start difference. First operand 2099 states and 2771 transitions. Second operand 145 states. [2019-11-20 03:32:02,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:32:02,956 INFO L93 Difference]: Finished difference Result 2228 states and 2941 transitions. [2019-11-20 03:32:02,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2019-11-20 03:32:02,956 INFO L78 Accepts]: Start accepts. Automaton has 145 states. Word has length 226 [2019-11-20 03:32:02,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:32:02,957 INFO L225 Difference]: With dead ends: 2228 [2019-11-20 03:32:02,957 INFO L226 Difference]: Without dead ends: 231 [2019-11-20 03:32:02,959 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11006 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=10451, Invalid=35131, Unknown=0, NotChecked=0, Total=45582 [2019-11-20 03:32:02,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2019-11-20 03:32:02,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 230. [2019-11-20 03:32:02,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2019-11-20 03:32:02,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 270 transitions. [2019-11-20 03:32:02,967 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 270 transitions. Word has length 226 [2019-11-20 03:32:02,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:32:02,967 INFO L462 AbstractCegarLoop]: Abstraction has 230 states and 270 transitions. [2019-11-20 03:32:02,967 INFO L463 AbstractCegarLoop]: Interpolant automaton has 145 states. [2019-11-20 03:32:02,967 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 270 transitions. [2019-11-20 03:32:02,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2019-11-20 03:32:02,968 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:32:02,968 INFO L410 BasicCegarLoop]: trace histogram [75, 74, 40, 35, 1, 1, 1, 1, 1] [2019-11-20 03:32:03,171 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:32:03,171 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:32:03,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:32:03,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1233708789, now seen corresponding path program 38 times [2019-11-20 03:32:03,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:32:03,171 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400229875] [2019-11-20 03:32:03,172 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:32:03,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:32:07,006 INFO L134 CoverageAnalysis]: Checked inductivity of 8325 backedges. 2369 proven. 5956 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:32:07,006 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400229875] [2019-11-20 03:32:07,006 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001899805] [2019-11-20 03:32:07,006 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:32:07,078 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 03:32:07,078 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:32:07,080 INFO L255 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 37 conjunts are in the unsatisfiable core [2019-11-20 03:32:07,081 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:32:09,254 INFO L134 CoverageAnalysis]: Checked inductivity of 8325 backedges. 4208 proven. 1855 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2019-11-20 03:32:09,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:32:09,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 37] total 147 [2019-11-20 03:32:09,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240912384] [2019-11-20 03:32:09,255 INFO L442 AbstractCegarLoop]: Interpolant automaton has 148 states [2019-11-20 03:32:09,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:32:09,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2019-11-20 03:32:09,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4149, Invalid=17607, Unknown=0, NotChecked=0, Total=21756 [2019-11-20 03:32:09,257 INFO L87 Difference]: Start difference. First operand 230 states and 270 transitions. Second operand 148 states. [2019-11-20 03:32:12,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:32:12,571 INFO L93 Difference]: Finished difference Result 359 states and 440 transitions. [2019-11-20 03:32:12,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2019-11-20 03:32:12,572 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 229 [2019-11-20 03:32:12,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:32:12,573 INFO L225 Difference]: With dead ends: 359 [2019-11-20 03:32:12,573 INFO L226 Difference]: Without dead ends: 234 [2019-11-20 03:32:12,574 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11401 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=11063, Invalid=36679, Unknown=0, NotChecked=0, Total=47742 [2019-11-20 03:32:12,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2019-11-20 03:32:12,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 233. [2019-11-20 03:32:12,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2019-11-20 03:32:12,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 273 transitions. [2019-11-20 03:32:12,582 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 273 transitions. Word has length 229 [2019-11-20 03:32:12,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:32:12,583 INFO L462 AbstractCegarLoop]: Abstraction has 233 states and 273 transitions. [2019-11-20 03:32:12,583 INFO L463 AbstractCegarLoop]: Interpolant automaton has 148 states. [2019-11-20 03:32:12,583 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 273 transitions. [2019-11-20 03:32:12,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2019-11-20 03:32:12,584 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:32:12,584 INFO L410 BasicCegarLoop]: trace histogram [76, 75, 40, 36, 1, 1, 1, 1, 1] [2019-11-20 03:32:12,784 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:32:12,784 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:32:12,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:32:12,785 INFO L82 PathProgramCache]: Analyzing trace with hash 656476925, now seen corresponding path program 39 times [2019-11-20 03:32:12,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:32:12,785 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626808638] [2019-11-20 03:32:12,785 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:32:12,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:32:16,961 INFO L134 CoverageAnalysis]: Checked inductivity of 8550 backedges. 2372 proven. 6178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:32:16,961 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626808638] [2019-11-20 03:32:16,961 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888532844] [2019-11-20 03:32:16,961 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:32:17,100 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2019-11-20 03:32:17,100 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:32:17,101 INFO L255 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 38 conjunts are in the unsatisfiable core [2019-11-20 03:32:17,103 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:32:19,355 INFO L134 CoverageAnalysis]: Checked inductivity of 8550 backedges. 4326 proven. 1962 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2019-11-20 03:32:19,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:32:19,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 38] total 150 [2019-11-20 03:32:19,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649507646] [2019-11-20 03:32:19,356 INFO L442 AbstractCegarLoop]: Interpolant automaton has 151 states [2019-11-20 03:32:19,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:32:19,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2019-11-20 03:32:19,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4334, Invalid=18316, Unknown=0, NotChecked=0, Total=22650 [2019-11-20 03:32:19,357 INFO L87 Difference]: Start difference. First operand 233 states and 273 transitions. Second operand 151 states. [2019-11-20 03:32:22,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:32:22,761 INFO L93 Difference]: Finished difference Result 362 states and 443 transitions. [2019-11-20 03:32:22,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2019-11-20 03:32:22,761 INFO L78 Accepts]: Start accepts. Automaton has 151 states. Word has length 232 [2019-11-20 03:32:22,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:32:22,762 INFO L225 Difference]: With dead ends: 362 [2019-11-20 03:32:22,762 INFO L226 Difference]: Without dead ends: 237 [2019-11-20 03:32:22,763 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11796 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=11698, Invalid=38254, Unknown=0, NotChecked=0, Total=49952 [2019-11-20 03:32:22,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2019-11-20 03:32:22,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 236. [2019-11-20 03:32:22,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2019-11-20 03:32:22,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 276 transitions. [2019-11-20 03:32:22,771 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 276 transitions. Word has length 232 [2019-11-20 03:32:22,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:32:22,772 INFO L462 AbstractCegarLoop]: Abstraction has 236 states and 276 transitions. [2019-11-20 03:32:22,772 INFO L463 AbstractCegarLoop]: Interpolant automaton has 151 states. [2019-11-20 03:32:22,772 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 276 transitions. [2019-11-20 03:32:22,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2019-11-20 03:32:22,772 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:32:22,773 INFO L410 BasicCegarLoop]: trace histogram [77, 76, 40, 37, 1, 1, 1, 1, 1] [2019-11-20 03:32:22,976 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:32:22,976 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:32:22,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:32:22,976 INFO L82 PathProgramCache]: Analyzing trace with hash -137135157, now seen corresponding path program 40 times [2019-11-20 03:32:22,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:32:22,977 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35129584] [2019-11-20 03:32:22,977 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:32:22,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:32:27,091 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 2375 proven. 6403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:32:27,091 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35129584] [2019-11-20 03:32:27,091 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755997271] [2019-11-20 03:32:27,091 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:32:27,176 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 03:32:27,176 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:32:27,178 INFO L255 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 39 conjunts are in the unsatisfiable core [2019-11-20 03:32:27,181 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:32:29,637 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 4444 proven. 2072 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2019-11-20 03:32:29,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:32:29,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 39] total 153 [2019-11-20 03:32:29,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350012532] [2019-11-20 03:32:29,638 INFO L442 AbstractCegarLoop]: Interpolant automaton has 154 states [2019-11-20 03:32:29,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:32:29,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2019-11-20 03:32:29,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4524, Invalid=19038, Unknown=0, NotChecked=0, Total=23562 [2019-11-20 03:32:29,640 INFO L87 Difference]: Start difference. First operand 236 states and 276 transitions. Second operand 154 states. [2019-11-20 03:32:33,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:32:33,204 INFO L93 Difference]: Finished difference Result 365 states and 446 transitions. [2019-11-20 03:32:33,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2019-11-20 03:32:33,204 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 235 [2019-11-20 03:32:33,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:32:33,205 INFO L225 Difference]: With dead ends: 365 [2019-11-20 03:32:33,205 INFO L226 Difference]: Without dead ends: 240 [2019-11-20 03:32:33,207 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12191 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=12356, Invalid=39856, Unknown=0, NotChecked=0, Total=52212 [2019-11-20 03:32:33,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2019-11-20 03:32:33,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 239. [2019-11-20 03:32:33,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2019-11-20 03:32:33,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 279 transitions. [2019-11-20 03:32:33,219 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 279 transitions. Word has length 235 [2019-11-20 03:32:33,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:32:33,219 INFO L462 AbstractCegarLoop]: Abstraction has 239 states and 279 transitions. [2019-11-20 03:32:33,219 INFO L463 AbstractCegarLoop]: Interpolant automaton has 154 states. [2019-11-20 03:32:33,219 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 279 transitions. [2019-11-20 03:32:33,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2019-11-20 03:32:33,221 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:32:33,221 INFO L410 BasicCegarLoop]: trace histogram [78, 77, 40, 38, 1, 1, 1, 1, 1] [2019-11-20 03:32:33,424 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:32:33,425 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:32:33,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:32:33,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1160294461, now seen corresponding path program 41 times [2019-11-20 03:32:33,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:32:33,426 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718693894] [2019-11-20 03:32:33,426 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:32:33,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:32:37,753 INFO L134 CoverageAnalysis]: Checked inductivity of 9009 backedges. 2378 proven. 6631 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:32:37,753 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718693894] [2019-11-20 03:32:37,753 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266566363] [2019-11-20 03:32:37,753 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:32:37,903 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2019-11-20 03:32:37,903 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:32:37,905 INFO L255 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-20 03:32:37,907 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:32:40,587 INFO L134 CoverageAnalysis]: Checked inductivity of 9009 backedges. 4562 proven. 2185 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2019-11-20 03:32:40,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:32:40,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 40] total 156 [2019-11-20 03:32:40,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731405643] [2019-11-20 03:32:40,588 INFO L442 AbstractCegarLoop]: Interpolant automaton has 157 states [2019-11-20 03:32:40,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:32:40,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 157 interpolants. [2019-11-20 03:32:40,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4719, Invalid=19773, Unknown=0, NotChecked=0, Total=24492 [2019-11-20 03:32:40,590 INFO L87 Difference]: Start difference. First operand 239 states and 279 transitions. Second operand 157 states. [2019-11-20 03:32:44,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:32:44,352 INFO L93 Difference]: Finished difference Result 368 states and 449 transitions. [2019-11-20 03:32:44,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2019-11-20 03:32:44,352 INFO L78 Accepts]: Start accepts. Automaton has 157 states. Word has length 238 [2019-11-20 03:32:44,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:32:44,353 INFO L225 Difference]: With dead ends: 368 [2019-11-20 03:32:44,353 INFO L226 Difference]: Without dead ends: 243 [2019-11-20 03:32:44,355 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12586 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=13037, Invalid=41485, Unknown=0, NotChecked=0, Total=54522 [2019-11-20 03:32:44,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2019-11-20 03:32:44,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 242. [2019-11-20 03:32:44,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2019-11-20 03:32:44,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 282 transitions. [2019-11-20 03:32:44,368 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 282 transitions. Word has length 238 [2019-11-20 03:32:44,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:32:44,369 INFO L462 AbstractCegarLoop]: Abstraction has 242 states and 282 transitions. [2019-11-20 03:32:44,369 INFO L463 AbstractCegarLoop]: Interpolant automaton has 157 states. [2019-11-20 03:32:44,369 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 282 transitions. [2019-11-20 03:32:44,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2019-11-20 03:32:44,370 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:32:44,370 INFO L410 BasicCegarLoop]: trace histogram [79, 78, 40, 39, 1, 1, 1, 1, 1] [2019-11-20 03:32:44,574 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:32:44,574 INFO L410 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:32:44,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:32:44,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1819619701, now seen corresponding path program 42 times [2019-11-20 03:32:44,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:32:44,574 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115826708] [2019-11-20 03:32:44,575 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:32:44,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:32:45,322 INFO L134 CoverageAnalysis]: Checked inductivity of 9243 backedges. 4680 proven. 2301 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2019-11-20 03:32:45,322 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115826708] [2019-11-20 03:32:45,322 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689195011] [2019-11-20 03:32:45,322 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:32:45,464 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2019-11-20 03:32:45,464 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:32:45,466 INFO L255 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 41 conjunts are in the unsatisfiable core [2019-11-20 03:32:45,467 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:32:45,508 INFO L134 CoverageAnalysis]: Checked inductivity of 9243 backedges. 4680 proven. 2301 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2019-11-20 03:32:45,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:32:45,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2019-11-20 03:32:45,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774189403] [2019-11-20 03:32:45,509 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-20 03:32:45,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:32:45,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-20 03:32:45,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-11-20 03:32:45,510 INFO L87 Difference]: Start difference. First operand 242 states and 282 transitions. Second operand 42 states. [2019-11-20 03:32:45,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:32:45,604 INFO L93 Difference]: Finished difference Result 371 states and 452 transitions. [2019-11-20 03:32:45,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-20 03:32:45,604 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 241 [2019-11-20 03:32:45,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:32:45,605 INFO L225 Difference]: With dead ends: 371 [2019-11-20 03:32:45,605 INFO L226 Difference]: Without dead ends: 246 [2019-11-20 03:32:45,605 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-11-20 03:32:45,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2019-11-20 03:32:45,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 245. [2019-11-20 03:32:45,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2019-11-20 03:32:45,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 285 transitions. [2019-11-20 03:32:45,614 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 285 transitions. Word has length 241 [2019-11-20 03:32:45,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:32:45,615 INFO L462 AbstractCegarLoop]: Abstraction has 245 states and 285 transitions. [2019-11-20 03:32:45,615 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-20 03:32:45,615 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 285 transitions. [2019-11-20 03:32:45,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2019-11-20 03:32:45,617 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:32:45,617 INFO L410 BasicCegarLoop]: trace histogram [80, 79, 40, 40, 1, 1, 1, 1, 1] [2019-11-20 03:32:45,819 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:32:45,819 INFO L410 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:32:45,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:32:45,820 INFO L82 PathProgramCache]: Analyzing trace with hash 531588477, now seen corresponding path program 43 times [2019-11-20 03:32:45,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:32:45,820 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916920096] [2019-11-20 03:32:45,820 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:32:45,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:32:46,813 INFO L134 CoverageAnalysis]: Checked inductivity of 9480 backedges. 0 proven. 7060 refuted. 0 times theorem prover too weak. 2420 trivial. 0 not checked. [2019-11-20 03:32:46,813 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916920096] [2019-11-20 03:32:46,813 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114152624] [2019-11-20 03:32:46,813 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:32:46,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:32:46,891 INFO L255 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 42 conjunts are in the unsatisfiable core [2019-11-20 03:32:46,892 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:32:48,303 INFO L134 CoverageAnalysis]: Checked inductivity of 9480 backedges. 4798 proven. 2420 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2019-11-20 03:32:48,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:32:48,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 84 [2019-11-20 03:32:48,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060047952] [2019-11-20 03:32:48,304 INFO L442 AbstractCegarLoop]: Interpolant automaton has 85 states [2019-11-20 03:32:48,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:32:48,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2019-11-20 03:32:48,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1768, Invalid=5372, Unknown=0, NotChecked=0, Total=7140 [2019-11-20 03:32:48,305 INFO L87 Difference]: Start difference. First operand 245 states and 285 transitions. Second operand 85 states. [2019-11-20 03:32:51,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:32:51,760 INFO L93 Difference]: Finished difference Result 1720 states and 2263 transitions. [2019-11-20 03:32:51,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2019-11-20 03:32:51,761 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 244 [2019-11-20 03:32:51,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:32:51,766 INFO L225 Difference]: With dead ends: 1720 [2019-11-20 03:32:51,766 INFO L226 Difference]: Without dead ends: 1595 [2019-11-20 03:32:51,767 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5945 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=6366, Invalid=22026, Unknown=0, NotChecked=0, Total=28392 [2019-11-20 03:32:51,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1595 states. [2019-11-20 03:32:51,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1595 to 311. [2019-11-20 03:32:51,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2019-11-20 03:32:51,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 372 transitions. [2019-11-20 03:32:51,791 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 372 transitions. Word has length 244 [2019-11-20 03:32:51,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:32:51,791 INFO L462 AbstractCegarLoop]: Abstraction has 311 states and 372 transitions. [2019-11-20 03:32:51,791 INFO L463 AbstractCegarLoop]: Interpolant automaton has 85 states. [2019-11-20 03:32:51,791 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 372 transitions. [2019-11-20 03:32:51,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2019-11-20 03:32:51,792 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:32:51,792 INFO L410 BasicCegarLoop]: trace histogram [82, 81, 41, 41, 1, 1, 1, 1, 1] [2019-11-20 03:32:51,992 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:32:51,992 INFO L410 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:32:51,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:32:51,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1426807743, now seen corresponding path program 44 times [2019-11-20 03:32:51,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:32:51,993 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994582540] [2019-11-20 03:32:51,993 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:32:52,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:32:52,941 INFO L134 CoverageAnalysis]: Checked inductivity of 9963 backedges. 0 proven. 7421 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2019-11-20 03:32:52,941 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994582540] [2019-11-20 03:32:52,941 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284632668] [2019-11-20 03:32:52,941 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:32:53,018 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 03:32:53,018 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:32:53,020 INFO L255 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 43 conjunts are in the unsatisfiable core [2019-11-20 03:32:53,022 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:32:54,530 INFO L134 CoverageAnalysis]: Checked inductivity of 9963 backedges. 5041 proven. 2542 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2019-11-20 03:32:54,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:32:54,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 86 [2019-11-20 03:32:54,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881639650] [2019-11-20 03:32:54,531 INFO L442 AbstractCegarLoop]: Interpolant automaton has 87 states [2019-11-20 03:32:54,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:32:54,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2019-11-20 03:32:54,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1853, Invalid=5629, Unknown=0, NotChecked=0, Total=7482 [2019-11-20 03:32:54,531 INFO L87 Difference]: Start difference. First operand 311 states and 372 transitions. Second operand 87 states. [2019-11-20 03:32:58,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:32:58,094 INFO L93 Difference]: Finished difference Result 1910 states and 2516 transitions. [2019-11-20 03:32:58,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2019-11-20 03:32:58,094 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 250 [2019-11-20 03:32:58,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:32:58,100 INFO L225 Difference]: With dead ends: 1910 [2019-11-20 03:32:58,100 INFO L226 Difference]: Without dead ends: 1722 [2019-11-20 03:32:58,101 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6237 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=6668, Invalid=23088, Unknown=0, NotChecked=0, Total=29756 [2019-11-20 03:32:58,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1722 states. [2019-11-20 03:32:58,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1722 to 317. [2019-11-20 03:32:58,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2019-11-20 03:32:58,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 379 transitions. [2019-11-20 03:32:58,152 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 379 transitions. Word has length 250 [2019-11-20 03:32:58,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:32:58,152 INFO L462 AbstractCegarLoop]: Abstraction has 317 states and 379 transitions. [2019-11-20 03:32:58,152 INFO L463 AbstractCegarLoop]: Interpolant automaton has 87 states. [2019-11-20 03:32:58,152 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 379 transitions. [2019-11-20 03:32:58,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2019-11-20 03:32:58,153 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:32:58,154 INFO L410 BasicCegarLoop]: trace histogram [84, 83, 42, 42, 1, 1, 1, 1, 1] [2019-11-20 03:32:58,356 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:32:58,357 INFO L410 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:32:58,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:32:58,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1206826819, now seen corresponding path program 45 times [2019-11-20 03:32:58,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:32:58,357 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428356344] [2019-11-20 03:32:58,357 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:32:58,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:32:59,199 INFO L134 CoverageAnalysis]: Checked inductivity of 10458 backedges. 0 proven. 7791 refuted. 0 times theorem prover too weak. 2667 trivial. 0 not checked. [2019-11-20 03:32:59,199 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428356344] [2019-11-20 03:32:59,200 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063708885] [2019-11-20 03:32:59,200 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:32:59,362 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 84 check-sat command(s) [2019-11-20 03:32:59,362 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:32:59,364 INFO L255 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 86 conjunts are in the unsatisfiable core [2019-11-20 03:32:59,366 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:32:59,768 INFO L134 CoverageAnalysis]: Checked inductivity of 10458 backedges. 5209 proven. 5126 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2019-11-20 03:32:59,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:32:59,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 53 [2019-11-20 03:32:59,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61013399] [2019-11-20 03:32:59,769 INFO L442 AbstractCegarLoop]: Interpolant automaton has 54 states [2019-11-20 03:32:59,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:32:59,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2019-11-20 03:32:59,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2019-11-20 03:32:59,770 INFO L87 Difference]: Start difference. First operand 317 states and 379 transitions. Second operand 54 states. [2019-11-20 03:33:02,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:33:02,692 INFO L93 Difference]: Finished difference Result 2235 states and 2954 transitions. [2019-11-20 03:33:02,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2019-11-20 03:33:02,692 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 256 [2019-11-20 03:33:02,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:33:02,702 INFO L225 Difference]: With dead ends: 2235 [2019-11-20 03:33:02,702 INFO L226 Difference]: Without dead ends: 2231 [2019-11-20 03:33:02,704 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2496 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=7901, Invalid=15355, Unknown=0, NotChecked=0, Total=23256 [2019-11-20 03:33:02,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2231 states. [2019-11-20 03:33:02,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2231 to 284. [2019-11-20 03:33:02,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2019-11-20 03:33:02,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 335 transitions. [2019-11-20 03:33:02,740 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 335 transitions. Word has length 256 [2019-11-20 03:33:02,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:33:02,741 INFO L462 AbstractCegarLoop]: Abstraction has 284 states and 335 transitions. [2019-11-20 03:33:02,741 INFO L463 AbstractCegarLoop]: Interpolant automaton has 54 states. [2019-11-20 03:33:02,741 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 335 transitions. [2019-11-20 03:33:02,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2019-11-20 03:33:02,742 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:33:02,743 INFO L410 BasicCegarLoop]: trace histogram [93, 92, 51, 42, 1, 1, 1, 1, 1] [2019-11-20 03:33:02,946 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:33:02,946 INFO L410 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:33:02,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:33:02,947 INFO L82 PathProgramCache]: Analyzing trace with hash -717938931, now seen corresponding path program 46 times [2019-11-20 03:33:02,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:33:02,947 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536944527] [2019-11-20 03:33:02,947 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:33:02,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:08,514 INFO L134 CoverageAnalysis]: Checked inductivity of 12834 backedges. 3853 proven. 8981 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:33:08,514 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536944527] [2019-11-20 03:33:08,514 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691137856] [2019-11-20 03:33:08,514 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:33:08,605 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 03:33:08,605 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:33:08,607 INFO L255 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 44 conjunts are in the unsatisfiable core [2019-11-20 03:33:08,609 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:33:11,655 INFO L134 CoverageAnalysis]: Checked inductivity of 12834 backedges. 6442 proven. 2667 refuted. 0 times theorem prover too weak. 3725 trivial. 0 not checked. [2019-11-20 03:33:11,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:33:11,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [136, 44] total 179 [2019-11-20 03:33:11,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255378918] [2019-11-20 03:33:11,656 INFO L442 AbstractCegarLoop]: Interpolant automaton has 180 states [2019-11-20 03:33:11,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:33:11,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 180 interpolants. [2019-11-20 03:33:11,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6055, Invalid=26165, Unknown=0, NotChecked=0, Total=32220 [2019-11-20 03:33:11,657 INFO L87 Difference]: Start difference. First operand 284 states and 335 transitions. Second operand 180 states. [2019-11-20 03:33:16,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:33:16,227 INFO L93 Difference]: Finished difference Result 446 states and 549 transitions. [2019-11-20 03:33:16,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2019-11-20 03:33:16,227 INFO L78 Accepts]: Start accepts. Automaton has 180 states. Word has length 283 [2019-11-20 03:33:16,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:33:16,228 INFO L225 Difference]: With dead ends: 446 [2019-11-20 03:33:16,228 INFO L226 Difference]: Without dead ends: 288 [2019-11-20 03:33:16,230 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16498 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=16497, Invalid=53463, Unknown=0, NotChecked=0, Total=69960 [2019-11-20 03:33:16,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2019-11-20 03:33:16,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 287. [2019-11-20 03:33:16,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2019-11-20 03:33:16,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 338 transitions. [2019-11-20 03:33:16,252 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 338 transitions. Word has length 283 [2019-11-20 03:33:16,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:33:16,252 INFO L462 AbstractCegarLoop]: Abstraction has 287 states and 338 transitions. [2019-11-20 03:33:16,252 INFO L463 AbstractCegarLoop]: Interpolant automaton has 180 states. [2019-11-20 03:33:16,252 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 338 transitions. [2019-11-20 03:33:16,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2019-11-20 03:33:16,253 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:33:16,253 INFO L410 BasicCegarLoop]: trace histogram [94, 93, 51, 43, 1, 1, 1, 1, 1] [2019-11-20 03:33:16,453 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:33:16,454 INFO L410 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:33:16,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:33:16,454 INFO L82 PathProgramCache]: Analyzing trace with hash 51963775, now seen corresponding path program 47 times [2019-11-20 03:33:16,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:33:16,454 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819141480] [2019-11-20 03:33:16,454 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:33:16,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:22,216 INFO L134 CoverageAnalysis]: Checked inductivity of 13113 backedges. 3856 proven. 9257 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:33:22,216 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819141480] [2019-11-20 03:33:22,216 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958439311] [2019-11-20 03:33:22,216 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:33:22,400 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 94 check-sat command(s) [2019-11-20 03:33:22,400 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:33:22,402 INFO L255 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 45 conjunts are in the unsatisfiable core [2019-11-20 03:33:22,404 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:33:25,562 INFO L134 CoverageAnalysis]: Checked inductivity of 13113 backedges. 6593 proven. 2795 refuted. 0 times theorem prover too weak. 3725 trivial. 0 not checked. [2019-11-20 03:33:25,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:33:25,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [138, 45] total 182 [2019-11-20 03:33:25,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051069255] [2019-11-20 03:33:25,564 INFO L442 AbstractCegarLoop]: Interpolant automaton has 183 states [2019-11-20 03:33:25,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:33:25,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 183 interpolants. [2019-11-20 03:33:25,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6275, Invalid=27031, Unknown=0, NotChecked=0, Total=33306 [2019-11-20 03:33:25,566 INFO L87 Difference]: Start difference. First operand 287 states and 338 transitions. Second operand 183 states. [2019-11-20 03:33:30,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:33:30,360 INFO L93 Difference]: Finished difference Result 449 states and 552 transitions. [2019-11-20 03:33:30,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2019-11-20 03:33:30,360 INFO L78 Accepts]: Start accepts. Automaton has 183 states. Word has length 286 [2019-11-20 03:33:30,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:33:30,361 INFO L225 Difference]: With dead ends: 449 [2019-11-20 03:33:30,362 INFO L226 Difference]: Without dead ends: 291 [2019-11-20 03:33:30,364 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 268 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16948 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=17293, Invalid=55337, Unknown=0, NotChecked=0, Total=72630 [2019-11-20 03:33:30,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2019-11-20 03:33:30,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 290. [2019-11-20 03:33:30,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2019-11-20 03:33:30,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 341 transitions. [2019-11-20 03:33:30,390 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 341 transitions. Word has length 286 [2019-11-20 03:33:30,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:33:30,391 INFO L462 AbstractCegarLoop]: Abstraction has 290 states and 341 transitions. [2019-11-20 03:33:30,391 INFO L463 AbstractCegarLoop]: Interpolant automaton has 183 states. [2019-11-20 03:33:30,391 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 341 transitions. [2019-11-20 03:33:30,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2019-11-20 03:33:30,392 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:33:30,393 INFO L410 BasicCegarLoop]: trace histogram [95, 94, 51, 44, 1, 1, 1, 1, 1] [2019-11-20 03:33:30,597 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:33:30,597 INFO L410 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:33:30,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:33:30,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1098117581, now seen corresponding path program 48 times [2019-11-20 03:33:30,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:33:30,598 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209946945] [2019-11-20 03:33:30,598 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:33:30,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:36,483 INFO L134 CoverageAnalysis]: Checked inductivity of 13395 backedges. 3859 proven. 9536 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:33:36,484 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209946945] [2019-11-20 03:33:36,484 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376174935] [2019-11-20 03:33:36,484 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:33:36,658 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 94 check-sat command(s) [2019-11-20 03:33:36,658 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:33:36,660 INFO L255 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 46 conjunts are in the unsatisfiable core [2019-11-20 03:33:36,662 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:33:39,945 INFO L134 CoverageAnalysis]: Checked inductivity of 13395 backedges. 6744 proven. 2926 refuted. 0 times theorem prover too weak. 3725 trivial. 0 not checked. [2019-11-20 03:33:39,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:33:39,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [140, 46] total 185 [2019-11-20 03:33:39,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341633305] [2019-11-20 03:33:39,946 INFO L442 AbstractCegarLoop]: Interpolant automaton has 186 states [2019-11-20 03:33:39,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:33:39,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 186 interpolants. [2019-11-20 03:33:39,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6500, Invalid=27910, Unknown=0, NotChecked=0, Total=34410 [2019-11-20 03:33:39,949 INFO L87 Difference]: Start difference. First operand 290 states and 341 transitions. Second operand 186 states. [2019-11-20 03:33:44,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:33:44,974 INFO L93 Difference]: Finished difference Result 452 states and 555 transitions. [2019-11-20 03:33:44,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2019-11-20 03:33:44,974 INFO L78 Accepts]: Start accepts. Automaton has 186 states. Word has length 289 [2019-11-20 03:33:44,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:33:44,975 INFO L225 Difference]: With dead ends: 452 [2019-11-20 03:33:44,975 INFO L226 Difference]: Without dead ends: 294 [2019-11-20 03:33:44,977 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 273 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17398 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=18112, Invalid=57238, Unknown=0, NotChecked=0, Total=75350 [2019-11-20 03:33:44,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2019-11-20 03:33:44,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 293. [2019-11-20 03:33:44,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2019-11-20 03:33:44,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 344 transitions. [2019-11-20 03:33:44,999 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 344 transitions. Word has length 289 [2019-11-20 03:33:44,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:33:44,999 INFO L462 AbstractCegarLoop]: Abstraction has 293 states and 344 transitions. [2019-11-20 03:33:44,999 INFO L463 AbstractCegarLoop]: Interpolant automaton has 186 states. [2019-11-20 03:33:45,000 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 344 transitions. [2019-11-20 03:33:45,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2019-11-20 03:33:45,001 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:33:45,001 INFO L410 BasicCegarLoop]: trace histogram [96, 95, 51, 45, 1, 1, 1, 1, 1] [2019-11-20 03:33:45,205 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:33:45,205 INFO L410 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:33:45,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:33:45,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1511514945, now seen corresponding path program 49 times [2019-11-20 03:33:45,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:33:45,206 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937603878] [2019-11-20 03:33:45,206 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:33:45,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:51,329 INFO L134 CoverageAnalysis]: Checked inductivity of 13680 backedges. 3862 proven. 9818 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:33:51,329 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937603878] [2019-11-20 03:33:51,329 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095305820] [2019-11-20 03:33:51,330 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:33:51,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:51,421 INFO L255 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 47 conjunts are in the unsatisfiable core [2019-11-20 03:33:51,422 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:33:55,058 INFO L134 CoverageAnalysis]: Checked inductivity of 13680 backedges. 6895 proven. 3060 refuted. 0 times theorem prover too weak. 3725 trivial. 0 not checked. [2019-11-20 03:33:55,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:33:55,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [142, 47] total 188 [2019-11-20 03:33:55,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905037309] [2019-11-20 03:33:55,059 INFO L442 AbstractCegarLoop]: Interpolant automaton has 189 states [2019-11-20 03:33:55,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:33:55,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 189 interpolants. [2019-11-20 03:33:55,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6730, Invalid=28802, Unknown=0, NotChecked=0, Total=35532 [2019-11-20 03:33:55,060 INFO L87 Difference]: Start difference. First operand 293 states and 344 transitions. Second operand 189 states. [2019-11-20 03:34:00,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:34:00,450 INFO L93 Difference]: Finished difference Result 455 states and 558 transitions. [2019-11-20 03:34:00,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2019-11-20 03:34:00,451 INFO L78 Accepts]: Start accepts. Automaton has 189 states. Word has length 292 [2019-11-20 03:34:00,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:34:00,452 INFO L225 Difference]: With dead ends: 455 [2019-11-20 03:34:00,452 INFO L226 Difference]: Without dead ends: 297 [2019-11-20 03:34:00,454 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 278 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17848 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=18954, Invalid=59166, Unknown=0, NotChecked=0, Total=78120 [2019-11-20 03:34:00,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2019-11-20 03:34:00,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 296. [2019-11-20 03:34:00,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2019-11-20 03:34:00,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 347 transitions. [2019-11-20 03:34:00,478 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 347 transitions. Word has length 292 [2019-11-20 03:34:00,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:34:00,479 INFO L462 AbstractCegarLoop]: Abstraction has 296 states and 347 transitions. [2019-11-20 03:34:00,479 INFO L463 AbstractCegarLoop]: Interpolant automaton has 189 states. [2019-11-20 03:34:00,479 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 347 transitions. [2019-11-20 03:34:00,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2019-11-20 03:34:00,480 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:34:00,480 INFO L410 BasicCegarLoop]: trace histogram [97, 96, 51, 46, 1, 1, 1, 1, 1] [2019-11-20 03:34:00,680 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:34:00,680 INFO L410 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:34:00,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:34:00,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1871072115, now seen corresponding path program 50 times [2019-11-20 03:34:00,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:34:00,681 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678171953] [2019-11-20 03:34:00,681 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:34:00,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:34:07,073 INFO L134 CoverageAnalysis]: Checked inductivity of 13968 backedges. 3865 proven. 10103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:34:07,074 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678171953] [2019-11-20 03:34:07,074 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744105698] [2019-11-20 03:34:07,074 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:34:07,164 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 03:34:07,164 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:34:07,166 INFO L255 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 48 conjunts are in the unsatisfiable core [2019-11-20 03:34:07,167 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:34:10,744 INFO L134 CoverageAnalysis]: Checked inductivity of 13968 backedges. 7046 proven. 3197 refuted. 0 times theorem prover too weak. 3725 trivial. 0 not checked. [2019-11-20 03:34:10,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:34:10,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [144, 48] total 191 [2019-11-20 03:34:10,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678248948] [2019-11-20 03:34:10,746 INFO L442 AbstractCegarLoop]: Interpolant automaton has 192 states [2019-11-20 03:34:10,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:34:10,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2019-11-20 03:34:10,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6965, Invalid=29707, Unknown=0, NotChecked=0, Total=36672 [2019-11-20 03:34:10,747 INFO L87 Difference]: Start difference. First operand 296 states and 347 transitions. Second operand 192 states. [2019-11-20 03:34:16,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:34:16,280 INFO L93 Difference]: Finished difference Result 458 states and 561 transitions. [2019-11-20 03:34:16,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2019-11-20 03:34:16,280 INFO L78 Accepts]: Start accepts. Automaton has 192 states. Word has length 295 [2019-11-20 03:34:16,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:34:16,281 INFO L225 Difference]: With dead ends: 458 [2019-11-20 03:34:16,281 INFO L226 Difference]: Without dead ends: 300 [2019-11-20 03:34:16,282 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 283 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18298 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=19819, Invalid=61121, Unknown=0, NotChecked=0, Total=80940 [2019-11-20 03:34:16,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2019-11-20 03:34:16,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 299. [2019-11-20 03:34:16,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2019-11-20 03:34:16,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 350 transitions. [2019-11-20 03:34:16,304 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 350 transitions. Word has length 295 [2019-11-20 03:34:16,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:34:16,304 INFO L462 AbstractCegarLoop]: Abstraction has 299 states and 350 transitions. [2019-11-20 03:34:16,304 INFO L463 AbstractCegarLoop]: Interpolant automaton has 192 states. [2019-11-20 03:34:16,305 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 350 transitions. [2019-11-20 03:34:16,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2019-11-20 03:34:16,305 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:34:16,306 INFO L410 BasicCegarLoop]: trace histogram [98, 97, 51, 47, 1, 1, 1, 1, 1] [2019-11-20 03:34:16,506 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:34:16,506 INFO L410 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:34:16,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:34:16,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1790287361, now seen corresponding path program 51 times [2019-11-20 03:34:16,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:34:16,507 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993374783] [2019-11-20 03:34:16,507 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:34:16,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:34:23,031 INFO L134 CoverageAnalysis]: Checked inductivity of 14259 backedges. 3868 proven. 10391 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:34:23,031 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993374783] [2019-11-20 03:34:23,032 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909997906] [2019-11-20 03:34:23,032 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:34:23,178 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 77 check-sat command(s) [2019-11-20 03:34:23,178 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:34:23,180 INFO L255 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 109 conjunts are in the unsatisfiable core [2019-11-20 03:34:23,183 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:34:27,765 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 03:34:28,009 INFO L134 CoverageAnalysis]: Checked inductivity of 14259 backedges. 7186 proven. 3876 refuted. 0 times theorem prover too weak. 3197 trivial. 0 not checked. [2019-11-20 03:34:28,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:34:28,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [146, 56] total 201 [2019-11-20 03:34:28,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321072853] [2019-11-20 03:34:28,010 INFO L442 AbstractCegarLoop]: Interpolant automaton has 201 states [2019-11-20 03:34:28,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:34:28,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 201 interpolants. [2019-11-20 03:34:28,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6091, Invalid=34109, Unknown=0, NotChecked=0, Total=40200 [2019-11-20 03:34:28,011 INFO L87 Difference]: Start difference. First operand 299 states and 350 transitions. Second operand 201 states. [2019-11-20 03:34:50,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:34:50,720 INFO L93 Difference]: Finished difference Result 4665 states and 6088 transitions. [2019-11-20 03:34:50,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 290 states. [2019-11-20 03:34:50,720 INFO L78 Accepts]: Start accepts. Automaton has 201 states. Word has length 298 [2019-11-20 03:34:50,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:34:50,725 INFO L225 Difference]: With dead ends: 4665 [2019-11-20 03:34:50,725 INFO L226 Difference]: Without dead ends: 4372 [2019-11-20 03:34:50,729 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 677 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 433 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45047 ImplicationChecksByTransitivity, 27.5s TimeCoverageRelationStatistics Valid=23149, Invalid=165641, Unknown=0, NotChecked=0, Total=188790 [2019-11-20 03:34:50,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4372 states. [2019-11-20 03:34:51,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4372 to 4176. [2019-11-20 03:34:51,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4176 states. [2019-11-20 03:34:51,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4176 states to 4176 states and 4276 transitions. [2019-11-20 03:34:51,170 INFO L78 Accepts]: Start accepts. Automaton has 4176 states and 4276 transitions. Word has length 298 [2019-11-20 03:34:51,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:34:51,171 INFO L462 AbstractCegarLoop]: Abstraction has 4176 states and 4276 transitions. [2019-11-20 03:34:51,171 INFO L463 AbstractCegarLoop]: Interpolant automaton has 201 states. [2019-11-20 03:34:51,171 INFO L276 IsEmpty]: Start isEmpty. Operand 4176 states and 4276 transitions. [2019-11-20 03:34:51,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2019-11-20 03:34:51,172 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:34:51,172 INFO L410 BasicCegarLoop]: trace histogram [100, 99, 52, 48, 1, 1, 1, 1, 1] [2019-11-20 03:34:51,375 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:34:51,376 INFO L410 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:34:51,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:34:51,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1210372483, now seen corresponding path program 52 times [2019-11-20 03:34:51,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:34:51,376 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071628275] [2019-11-20 03:34:51,376 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:34:51,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:34:58,167 INFO L134 CoverageAnalysis]: Checked inductivity of 14850 backedges. 4022 proven. 10828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:34:58,167 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071628275] [2019-11-20 03:34:58,167 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582257046] [2019-11-20 03:34:58,168 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:34:58,259 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 03:34:58,260 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:34:58,262 INFO L255 TraceCheckSpWp]: Trace formula consists of 711 conjuncts, 50 conjunts are in the unsatisfiable core [2019-11-20 03:34:58,264 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:35:02,266 INFO L134 CoverageAnalysis]: Checked inductivity of 14850 backedges. 7494 proven. 3480 refuted. 0 times theorem prover too weak. 3876 trivial. 0 not checked. [2019-11-20 03:35:02,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:35:02,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [149, 50] total 198 [2019-11-20 03:35:02,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030137549] [2019-11-20 03:35:02,267 INFO L442 AbstractCegarLoop]: Interpolant automaton has 199 states [2019-11-20 03:35:02,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:35:02,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 199 interpolants. [2019-11-20 03:35:02,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7502, Invalid=31900, Unknown=0, NotChecked=0, Total=39402 [2019-11-20 03:35:02,268 INFO L87 Difference]: Start difference. First operand 4176 states and 4276 transitions. Second operand 199 states. [2019-11-20 03:35:08,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:35:08,794 INFO L93 Difference]: Finished difference Result 8212 states and 8413 transitions. [2019-11-20 03:35:08,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2019-11-20 03:35:08,794 INFO L78 Accepts]: Start accepts. Automaton has 199 states. Word has length 304 [2019-11-20 03:35:08,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:35:08,800 INFO L225 Difference]: With dead ends: 8212 [2019-11-20 03:35:08,800 INFO L226 Difference]: Without dead ends: 4180 [2019-11-20 03:35:08,805 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 294 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19440 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=21670, Invalid=65650, Unknown=0, NotChecked=0, Total=87320 [2019-11-20 03:35:08,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4180 states. [2019-11-20 03:35:09,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4180 to 4179. [2019-11-20 03:35:09,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4179 states. [2019-11-20 03:35:09,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4179 states to 4179 states and 4279 transitions. [2019-11-20 03:35:09,262 INFO L78 Accepts]: Start accepts. Automaton has 4179 states and 4279 transitions. Word has length 304 [2019-11-20 03:35:09,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:35:09,263 INFO L462 AbstractCegarLoop]: Abstraction has 4179 states and 4279 transitions. [2019-11-20 03:35:09,263 INFO L463 AbstractCegarLoop]: Interpolant automaton has 199 states. [2019-11-20 03:35:09,263 INFO L276 IsEmpty]: Start isEmpty. Operand 4179 states and 4279 transitions. [2019-11-20 03:35:09,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2019-11-20 03:35:09,264 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:35:09,265 INFO L410 BasicCegarLoop]: trace histogram [101, 100, 52, 49, 1, 1, 1, 1, 1] [2019-11-20 03:35:09,468 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:35:09,468 INFO L410 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:35:09,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:35:09,468 INFO L82 PathProgramCache]: Analyzing trace with hash -2026798773, now seen corresponding path program 53 times [2019-11-20 03:35:09,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:35:09,469 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115012929] [2019-11-20 03:35:09,469 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:35:09,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:35:16,581 INFO L134 CoverageAnalysis]: Checked inductivity of 15150 backedges. 4025 proven. 11125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:35:16,582 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115012929] [2019-11-20 03:35:16,582 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612565702] [2019-11-20 03:35:16,582 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:35:16,792 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 101 check-sat command(s) [2019-11-20 03:35:16,792 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:35:16,795 INFO L255 TraceCheckSpWp]: Trace formula consists of 718 conjuncts, 51 conjunts are in the unsatisfiable core [2019-11-20 03:35:16,797 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:35:20,807 INFO L134 CoverageAnalysis]: Checked inductivity of 15150 backedges. 7648 proven. 3626 refuted. 0 times theorem prover too weak. 3876 trivial. 0 not checked. [2019-11-20 03:35:20,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:35:20,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [151, 51] total 201 [2019-11-20 03:35:20,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719137743] [2019-11-20 03:35:20,808 INFO L442 AbstractCegarLoop]: Interpolant automaton has 202 states [2019-11-20 03:35:20,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:35:20,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 202 interpolants. [2019-11-20 03:35:20,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7752, Invalid=32850, Unknown=0, NotChecked=0, Total=40602 [2019-11-20 03:35:20,809 INFO L87 Difference]: Start difference. First operand 4179 states and 4279 transitions. Second operand 202 states. [2019-11-20 03:35:27,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:35:27,567 INFO L93 Difference]: Finished difference Result 8214 states and 8415 transitions. [2019-11-20 03:35:27,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2019-11-20 03:35:27,568 INFO L78 Accepts]: Start accepts. Automaton has 202 states. Word has length 307 [2019-11-20 03:35:27,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:35:27,574 INFO L225 Difference]: With dead ends: 8214 [2019-11-20 03:35:27,574 INFO L226 Difference]: Without dead ends: 4182 [2019-11-20 03:35:27,580 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 556 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19895 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=22604, Invalid=67696, Unknown=0, NotChecked=0, Total=90300 [2019-11-20 03:35:27,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4182 states. [2019-11-20 03:35:28,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4182 to 4182. [2019-11-20 03:35:28,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4182 states. [2019-11-20 03:35:28,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4182 states to 4182 states and 4282 transitions. [2019-11-20 03:35:28,099 INFO L78 Accepts]: Start accepts. Automaton has 4182 states and 4282 transitions. Word has length 307 [2019-11-20 03:35:28,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:35:28,099 INFO L462 AbstractCegarLoop]: Abstraction has 4182 states and 4282 transitions. [2019-11-20 03:35:28,099 INFO L463 AbstractCegarLoop]: Interpolant automaton has 202 states. [2019-11-20 03:35:28,099 INFO L276 IsEmpty]: Start isEmpty. Operand 4182 states and 4282 transitions. [2019-11-20 03:35:28,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2019-11-20 03:35:28,100 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:35:28,101 INFO L410 BasicCegarLoop]: trace histogram [102, 101, 52, 50, 1, 1, 1, 1, 1] [2019-11-20 03:35:28,301 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:35:28,301 INFO L410 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:35:28,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:35:28,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1782606915, now seen corresponding path program 54 times [2019-11-20 03:35:28,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:35:28,302 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021327930] [2019-11-20 03:35:28,302 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:35:28,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:35:29,426 INFO L134 CoverageAnalysis]: Checked inductivity of 15453 backedges. 7903 proven. 7401 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2019-11-20 03:35:29,426 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021327930] [2019-11-20 03:35:29,426 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757620489] [2019-11-20 03:35:29,426 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:35:29,634 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 102 check-sat command(s) [2019-11-20 03:35:29,634 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:35:29,637 INFO L255 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 103 conjunts are in the unsatisfiable core [2019-11-20 03:35:29,639 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:35:29,730 INFO L134 CoverageAnalysis]: Checked inductivity of 15453 backedges. 7903 proven. 7401 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2019-11-20 03:35:29,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:35:29,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2019-11-20 03:35:29,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560817920] [2019-11-20 03:35:29,731 INFO L442 AbstractCegarLoop]: Interpolant automaton has 54 states [2019-11-20 03:35:29,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:35:29,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2019-11-20 03:35:29,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2019-11-20 03:35:29,731 INFO L87 Difference]: Start difference. First operand 4182 states and 4282 transitions. Second operand 54 states. [2019-11-20 03:35:30,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:35:30,476 INFO L93 Difference]: Finished difference Result 8368 states and 8569 transitions. [2019-11-20 03:35:30,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-11-20 03:35:30,477 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 310 [2019-11-20 03:35:30,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:35:30,484 INFO L225 Difference]: With dead ends: 8368 [2019-11-20 03:35:30,484 INFO L226 Difference]: Without dead ends: 4185 [2019-11-20 03:35:30,488 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 360 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2019-11-20 03:35:30,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4185 states. [2019-11-20 03:35:31,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4185 to 4185. [2019-11-20 03:35:31,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4185 states. [2019-11-20 03:35:31,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4185 states to 4185 states and 4285 transitions. [2019-11-20 03:35:31,119 INFO L78 Accepts]: Start accepts. Automaton has 4185 states and 4285 transitions. Word has length 310 [2019-11-20 03:35:31,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:35:31,119 INFO L462 AbstractCegarLoop]: Abstraction has 4185 states and 4285 transitions. [2019-11-20 03:35:31,119 INFO L463 AbstractCegarLoop]: Interpolant automaton has 54 states. [2019-11-20 03:35:31,119 INFO L276 IsEmpty]: Start isEmpty. Operand 4185 states and 4285 transitions. [2019-11-20 03:35:31,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2019-11-20 03:35:31,120 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:35:31,120 INFO L410 BasicCegarLoop]: trace histogram [103, 102, 52, 51, 1, 1, 1, 1, 1] [2019-11-20 03:35:31,321 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:35:31,321 INFO L410 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:35:31,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:35:31,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1557402635, now seen corresponding path program 55 times [2019-11-20 03:35:31,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:35:31,321 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113506492] [2019-11-20 03:35:31,321 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:35:31,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:35:32,463 INFO L134 CoverageAnalysis]: Checked inductivity of 15759 backedges. 11729 proven. 0 refuted. 0 times theorem prover too weak. 4030 trivial. 0 not checked. [2019-11-20 03:35:32,463 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113506492] [2019-11-20 03:35:32,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 03:35:32,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2019-11-20 03:35:32,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924391558] [2019-11-20 03:35:32,463 INFO L442 AbstractCegarLoop]: Interpolant automaton has 53 states [2019-11-20 03:35:32,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:35:32,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2019-11-20 03:35:32,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2019-11-20 03:35:32,464 INFO L87 Difference]: Start difference. First operand 4185 states and 4285 transitions. Second operand 53 states. [2019-11-20 03:35:32,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:35:32,667 INFO L93 Difference]: Finished difference Result 4185 states and 4285 transitions. [2019-11-20 03:35:32,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-11-20 03:35:32,668 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 313 [2019-11-20 03:35:32,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:35:32,668 INFO L225 Difference]: With dead ends: 4185 [2019-11-20 03:35:32,668 INFO L226 Difference]: Without dead ends: 0 [2019-11-20 03:35:32,671 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2019-11-20 03:35:32,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-20 03:35:32,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-20 03:35:32,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-20 03:35:32,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-20 03:35:32,672 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 313 [2019-11-20 03:35:32,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:35:32,672 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 03:35:32,672 INFO L463 AbstractCegarLoop]: Interpolant automaton has 53 states. [2019-11-20 03:35:32,672 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-20 03:35:32,672 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-20 03:35:32,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-20 03:35:45,984 WARN L191 SmtUtils]: Spent 13.30 s on a formula simplification. DAG size of input: 1882 DAG size of output: 1213 [2019-11-20 03:35:57,751 WARN L191 SmtUtils]: Spent 11.75 s on a formula simplification. DAG size of input: 1146 DAG size of output: 489 [2019-11-20 03:35:57,755 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-20 03:35:57,756 INFO L444 ceAbstractionStarter]: For program point L15(lines 15 19) no Hoare annotation was computed. [2019-11-20 03:35:57,756 INFO L444 ceAbstractionStarter]: For program point L15-2(lines 14 22) no Hoare annotation was computed. [2019-11-20 03:35:57,756 INFO L444 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2019-11-20 03:35:57,756 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-20 03:35:57,756 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-20 03:35:57,756 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-11-20 03:35:57,756 INFO L447 ceAbstractionStarter]: At program point L24(lines 10 25) the Hoare annotation is: true [2019-11-20 03:35:57,758 INFO L440 ceAbstractionStarter]: At program point L14-2(lines 14 22) the Hoare annotation is: (let ((.cse26 (<= 3 ULTIMATE.start_main_~y~0)) (.cse36 (<= ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~y~0)) (.cse18 (<= 19 ULTIMATE.start_main_~y~0))) (let ((.cse10 (and .cse36 .cse18)) (.cse41 (<= 42 ULTIMATE.start_main_~y~0)) (.cse23 (<= 49 ULTIMATE.start_main_~y~0)) (.cse42 (<= 8 ULTIMATE.start_main_~y~0)) (.cse0 (and .cse36 .cse26))) (let ((.cse7 (<= ULTIMATE.start_main_~y~0 48)) (.cse16 (<= ULTIMATE.start_main_~y~0 20)) (.cse2 (<= 27 ULTIMATE.start_main_~y~0)) (.cse28 (<= ULTIMATE.start_main_~y~0 15)) (.cse32 (<= 7 ULTIMATE.start_main_~y~0)) (.cse22 (<= ULTIMATE.start_main_~y~0 9)) (.cse20 (<= ULTIMATE.start_main_~y~0 38)) (.cse12 (<= 14 ULTIMATE.start_main_~y~0)) (.cse27 (<= ULTIMATE.start_main_~y~0 33)) (.cse31 (<= ULTIMATE.start_main_~y~0 17)) (.cse19 (<= ULTIMATE.start_main_~y~0 42)) (.cse38 (<= 1 ULTIMATE.start_main_~y~0)) (.cse24 (<= ULTIMATE.start_main_~y~0 49)) (.cse37 (<= ULTIMATE.start_main_~y~0 36)) (.cse29 (<= ULTIMATE.start_main_~y~0 12)) (.cse17 (<= ULTIMATE.start_main_~y~0 19)) (.cse14 (<= ULTIMATE.start_main_~y~0 21)) (.cse13 (<= 21 ULTIMATE.start_main_~y~0)) (.cse35 (<= ULTIMATE.start_main_~y~0 24)) (.cse21 (<= ULTIMATE.start_main_~y~0 28)) (.cse30 (<= ULTIMATE.start_main_~y~0 47)) (.cse39 (<= ULTIMATE.start_main_~y~0 23)) (.cse45 (<= ULTIMATE.start_main_~y~0 44)) (.cse44 (<= ULTIMATE.start_main_~y~0 10)) (.cse15 (<= 40 ULTIMATE.start_main_~y~0)) (.cse11 (<= ULTIMATE.start_main_~y~0 31)) (.cse34 (<= 5 ULTIMATE.start_main_~y~0)) (.cse3 (<= ULTIMATE.start_main_~y~0 16)) (.cse6 (or .cse23 (and .cse42 .cse0))) (.cse43 (<= ULTIMATE.start_main_~y~0 45)) (.cse25 (<= 11 ULTIMATE.start_main_~y~0)) (.cse9 (<= ULTIMATE.start_main_~y~0 30)) (.cse1 (<= ULTIMATE.start_main_~y~0 6)) (.cse33 (<= ULTIMATE.start_main_~y~0 32)) (.cse40 (<= ULTIMATE.start_main_~y~0 43)) (.cse8 (and .cse10 .cse41)) (.cse46 (<= 0 ULTIMATE.start_main_~y~0)) (.cse4 (<= 41 ULTIMATE.start_main_~y~0)) (.cse5 (+ ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~y~0))) (or (and (<= 6 ULTIMATE.start_main_~x~0) .cse0 .cse1) (and (<= 73 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 27) (<= ULTIMATE.start_main_~x~0 73) .cse2) (and (<= 84 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 84) .cse3 (<= 16 ULTIMATE.start_main_~y~0)) (and (<= 59 ULTIMATE.start_main_~x~0) .cse4 (<= ULTIMATE.start_main_~y~0 41) (<= ULTIMATE.start_main_~x~0 59)) (and (<= 18 ULTIMATE.start_main_~x~0) (<= .cse5 36) .cse6) (and (<= 48 ULTIMATE.start_main_~x~0) .cse7 .cse8) (and (<= 30 ULTIMATE.start_main_~x~0) .cse9 .cse10) (and (<= 31 ULTIMATE.start_main_~y~0) .cse11 (<= 69 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 69)) (and (<= 34 ULTIMATE.start_main_~x~0) (<= .cse5 68) .cse10) (and (<= 86 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 14) (<= ULTIMATE.start_main_~x~0 86) .cse12) (and .cse13 .cse14 (<= ULTIMATE.start_main_~x~0 79) (<= 79 ULTIMATE.start_main_~x~0)) (and (<= 52 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 52) .cse7 (<= 48 ULTIMATE.start_main_~y~0)) (and (<= ULTIMATE.start_main_~y~0 40) (<= ULTIMATE.start_main_~x~0 60) (<= 60 ULTIMATE.start_main_~x~0) .cse15) (and (<= ULTIMATE.start_main_~y~0 13) (<= 13 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 87) (<= 87 ULTIMATE.start_main_~x~0)) (and (<= 26 ULTIMATE.start_main_~x~0) .cse10 (<= .cse5 52)) (and .cse16 (<= 20 ULTIMATE.start_main_~x~0) .cse10) (and .cse16 (<= ULTIMATE.start_main_~x~0 80) (<= 20 ULTIMATE.start_main_~y~0) (<= 80 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~x~0 81) (<= 81 ULTIMATE.start_main_~x~0) .cse17 .cse18) (and (<= .cse5 54) (<= 27 ULTIMATE.start_main_~x~0) .cse2) (and (<= 42 ULTIMATE.start_main_~x~0) .cse19 .cse8) (and (<= 38 ULTIMATE.start_main_~y~0) (<= 62 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 62) .cse20) (and (<= 28 ULTIMATE.start_main_~y~0) .cse21 (<= 72 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 72)) (and .cse22 (<= 9 ULTIMATE.start_main_~y~0) (<= 91 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 91)) (and (<= ULTIMATE.start_main_~x~0 51) .cse23 (<= 51 ULTIMATE.start_main_~x~0) .cse24) (and (<= 11 ULTIMATE.start_main_~x~0) (<= .cse5 22) .cse25) (and (<= 97 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 97) (<= ULTIMATE.start_main_~y~0 3) .cse26) (and (<= 71 ULTIMATE.start_main_~x~0) (<= 29 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 71) (<= ULTIMATE.start_main_~y~0 29)) (and (<= ULTIMATE.start_main_~x~0 67) (<= 67 ULTIMATE.start_main_~x~0) (<= 33 ULTIMATE.start_main_~y~0) .cse27) (and (<= 15 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 85) (<= 85 ULTIMATE.start_main_~x~0) .cse28) (and (<= 12 ULTIMATE.start_main_~x~0) .cse6 .cse29) (and (<= 47 ULTIMATE.start_main_~x~0) .cse30 .cse8) (and (<= ULTIMATE.start_main_~y~0 35) (<= 35 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 65) (<= 65 ULTIMATE.start_main_~x~0)) (and (<= 15 ULTIMATE.start_main_~x~0) .cse6 .cse28) (and .cse6 (<= 17 ULTIMATE.start_main_~x~0) .cse31) (and (<= 7 ULTIMATE.start_main_~x~0) (<= .cse5 14) .cse32) (and (<= 93 ULTIMATE.start_main_~x~0) .cse32 (<= ULTIMATE.start_main_~x~0 93) (<= ULTIMATE.start_main_~y~0 7)) (and .cse22 (<= 9 ULTIMATE.start_main_~x~0) .cse6) (and (<= 32 ULTIMATE.start_main_~x~0) .cse33 .cse10) (and (<= 5 ULTIMATE.start_main_~x~0) (<= .cse5 10) .cse34) (and (<= 37 ULTIMATE.start_main_~x~0) .cse10 (<= .cse5 74)) (and (<= 24 ULTIMATE.start_main_~x~0) .cse35 .cse10) (and .cse36 (<= .cse5 4) (<= 2 ULTIMATE.start_main_~x~0)) (and .cse6 (<= 8 ULTIMATE.start_main_~x~0) (<= .cse5 16)) (and (<= 39 ULTIMATE.start_main_~x~0) (<= .cse5 78) .cse10) (and .cse0 (<= 4 ULTIMATE.start_main_~x~0) (<= .cse5 8)) (and (<= 36 ULTIMATE.start_main_~x~0) .cse10 .cse37) (and (<= ULTIMATE.start_main_~y~0 1) .cse38 (<= 99 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 99)) (and (<= 29 ULTIMATE.start_main_~x~0) (<= .cse5 58) .cse10) (and (<= 38 ULTIMATE.start_main_~x~0) .cse10 .cse20) (and (<= 14 ULTIMATE.start_main_~x~0) (<= .cse5 28) .cse12) (and (<= ULTIMATE.start_main_~x~0 61) (<= ULTIMATE.start_main_~y~0 39) (<= 39 ULTIMATE.start_main_~y~0) (<= 61 ULTIMATE.start_main_~x~0)) (and (<= 23 ULTIMATE.start_main_~x~0) .cse39 .cse10) (and (<= ULTIMATE.start_main_~x~0 57) (<= 57 ULTIMATE.start_main_~x~0) .cse40 (<= 43 ULTIMATE.start_main_~y~0)) (and (<= 33 ULTIMATE.start_main_~x~0) .cse27 .cse10) (and (<= ULTIMATE.start_main_~x~0 83) (<= 17 ULTIMATE.start_main_~y~0) (<= 83 ULTIMATE.start_main_~x~0) .cse31) (and (<= ULTIMATE.start_main_~x~0 58) .cse41 (<= 58 ULTIMATE.start_main_~x~0) .cse19) (and (<= ULTIMATE.start_main_~x~0 92) (<= 92 ULTIMATE.start_main_~x~0) .cse42 (<= ULTIMATE.start_main_~y~0 8)) (and (<= 1 ULTIMATE.start_main_~x~0) .cse38 (<= .cse5 2)) (and (<= 66 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 34) (<= ULTIMATE.start_main_~x~0 66) (<= 34 ULTIMATE.start_main_~y~0)) (and (<= 45 ULTIMATE.start_main_~x~0) .cse43 .cse8) (and (<= ULTIMATE.start_main_~x~0 90) (<= 90 ULTIMATE.start_main_~x~0) .cse44 (<= 10 ULTIMATE.start_main_~y~0)) (and (<= 49 ULTIMATE.start_main_~x~0) .cse8 .cse24) (and .cse45 (<= 44 ULTIMATE.start_main_~x~0) .cse8) (and (<= 36 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 64) (<= 64 ULTIMATE.start_main_~x~0) .cse37) (and (<= .cse5 0) (<= 0 ULTIMATE.start_main_~x~0) .cse46) (and (<= 12 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 88) .cse29 (<= 88 ULTIMATE.start_main_~x~0)) (and (<= 3 ULTIMATE.start_main_~x~0) .cse26 (<= .cse5 6)) (and (<= 19 ULTIMATE.start_main_~x~0) .cse17 .cse10) (and .cse14 (<= 21 ULTIMATE.start_main_~x~0) .cse13 (<= ULTIMATE.start_main_~x~0 21)) (and (<= 25 ULTIMATE.start_main_~x~0) (<= .cse5 50) .cse10) (and (<= ULTIMATE.start_main_~x~0 76) (<= 76 ULTIMATE.start_main_~x~0) .cse35 (<= 24 ULTIMATE.start_main_~y~0)) (and (<= 28 ULTIMATE.start_main_~x~0) .cse21 .cse10) (and (<= ULTIMATE.start_main_~x~0 53) (<= 47 ULTIMATE.start_main_~y~0) (<= 53 ULTIMATE.start_main_~x~0) .cse30) (and (<= ULTIMATE.start_main_~x~0 77) (<= 77 ULTIMATE.start_main_~x~0) .cse39 (<= 23 ULTIMATE.start_main_~y~0)) (and (<= 44 ULTIMATE.start_main_~y~0) (<= 56 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 56) .cse45) (and (<= 10 ULTIMATE.start_main_~x~0) .cse44 .cse6) (and (<= 40 ULTIMATE.start_main_~x~0) (<= .cse5 80) .cse15) (and (<= .cse5 26) .cse6 (<= 13 ULTIMATE.start_main_~x~0)) (and (<= 31 ULTIMATE.start_main_~x~0) .cse11 .cse10) (and (<= 50 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 50) .cse8) (and (<= ULTIMATE.start_main_~y~0 18) (<= 82 ULTIMATE.start_main_~x~0) (<= 18 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 82)) (and (<= ULTIMATE.start_main_~y~0 5) .cse34 (<= ULTIMATE.start_main_~x~0 95) (<= 95 ULTIMATE.start_main_~x~0)) (and (<= .cse5 92) .cse8 (<= 46 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~y~0 22) (<= 22 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 78) (<= 78 ULTIMATE.start_main_~x~0)) (and .cse3 (<= 16 ULTIMATE.start_main_~x~0) .cse6) (and (<= 37 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 37) (<= 63 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 63)) (and (<= 55 ULTIMATE.start_main_~x~0) (<= 45 ULTIMATE.start_main_~y~0) .cse43 (<= ULTIMATE.start_main_~x~0 55)) (and (<= ULTIMATE.start_main_~y~0 11) (<= 89 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 89) .cse25) (and (<= ULTIMATE.start_main_~x~0 70) .cse9 (<= 70 ULTIMATE.start_main_~x~0) (<= 30 ULTIMATE.start_main_~y~0)) (and (<= ULTIMATE.start_main_~x~0 94) (<= 6 ULTIMATE.start_main_~y~0) (<= 94 ULTIMATE.start_main_~x~0) .cse1) (and (<= ULTIMATE.start_main_~x~0 68) .cse33 (<= 32 ULTIMATE.start_main_~y~0) (<= 68 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~y~0 25) (<= 75 ULTIMATE.start_main_~x~0) (<= 25 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 75)) (and (<= 43 ULTIMATE.start_main_~x~0) .cse40 .cse8) (and (<= 22 ULTIMATE.start_main_~x~0) .cse10 (<= .cse5 44)) (and (<= 2 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 2) (<= 98 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 98)) (and (<= .cse5 70) .cse10 (<= 35 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~y~0 0) (<= 100 ULTIMATE.start_main_~x~0) .cse46 (<= ULTIMATE.start_main_~x~0 100)) (and (<= ULTIMATE.start_main_~x~0 74) (<= ULTIMATE.start_main_~y~0 26) (<= 26 ULTIMATE.start_main_~y~0) (<= 74 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~y~0 4) (<= ULTIMATE.start_main_~x~0 96) (<= 96 ULTIMATE.start_main_~x~0) (<= 4 ULTIMATE.start_main_~y~0)) (and (<= ULTIMATE.start_main_~y~0 46) (<= 54 ULTIMATE.start_main_~x~0) (<= 46 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 54)) (and .cse4 (<= 41 ULTIMATE.start_main_~x~0) (<= .cse5 82)))))) [2019-11-20 03:35:57,758 INFO L444 ceAbstractionStarter]: For program point L14-3(lines 14 22) no Hoare annotation was computed. [2019-11-20 03:35:57,759 INFO L444 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-11-20 03:35:57,759 INFO L447 ceAbstractionStarter]: At program point L4-2(lines 3 8) the Hoare annotation is: true [2019-11-20 03:35:57,807 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 03:35:57 BoogieIcfgContainer [2019-11-20 03:35:57,807 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-20 03:35:57,808 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 03:35:57,808 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 03:35:57,808 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 03:35:57,809 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 03:29:23" (3/4) ... [2019-11-20 03:35:57,812 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-20 03:35:57,822 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2019-11-20 03:35:57,822 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-20 03:35:57,863 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_417af22c-e598-42fc-ab48-f32845ea141b/bin/uautomizer/witness.graphml [2019-11-20 03:35:57,863 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 03:35:57,865 INFO L168 Benchmark]: Toolchain (without parser) took 395267.31 ms. Allocated memory was 1.0 GB in the beginning and 2.1 GB in the end (delta: 1.1 GB). Free memory was 943.4 MB in the beginning and 867.1 MB in the end (delta: 76.2 MB). Peak memory consumption was 1.2 GB. Max. memory is 11.5 GB. [2019-11-20 03:35:57,865 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 03:35:57,866 INFO L168 Benchmark]: CACSL2BoogieTranslator took 296.50 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 120.1 MB). Free memory was 943.4 MB in the beginning and 1.1 GB in the end (delta: -172.9 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. [2019-11-20 03:35:57,866 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.46 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 03:35:57,866 INFO L168 Benchmark]: Boogie Preprocessor took 13.27 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 03:35:57,867 INFO L168 Benchmark]: RCFGBuilder took 277.13 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. [2019-11-20 03:35:57,867 INFO L168 Benchmark]: TraceAbstraction took 394591.73 ms. Allocated memory was 1.1 GB in the beginning and 2.1 GB in the end (delta: 986.7 MB). Free memory was 1.1 GB in the beginning and 875.4 MB in the end (delta: 221.2 MB). Peak memory consumption was 1.3 GB. Max. memory is 11.5 GB. [2019-11-20 03:35:57,867 INFO L168 Benchmark]: Witness Printer took 55.86 ms. Allocated memory is still 2.1 GB. Free memory was 875.4 MB in the beginning and 867.1 MB in the end (delta: 8.3 MB). Peak memory consumption was 8.3 MB. Max. memory is 11.5 GB. [2019-11-20 03:35:57,869 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 296.50 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 120.1 MB). Free memory was 943.4 MB in the beginning and 1.1 GB in the end (delta: -172.9 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 28.46 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 13.27 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 277.13 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 394591.73 ms. Allocated memory was 1.1 GB in the beginning and 2.1 GB in the end (delta: 986.7 MB). Free memory was 1.1 GB in the beginning and 875.4 MB in the end (delta: 221.2 MB). Peak memory consumption was 1.3 GB. Max. memory is 11.5 GB. * Witness Printer took 55.86 ms. Allocated memory is still 2.1 GB. Free memory was 875.4 MB in the beginning and 867.1 MB in the end (delta: 8.3 MB). Peak memory consumption was 8.3 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((6 <= x && x <= y && 3 <= y) && y <= 6) || (((73 <= x && y <= 27) && x <= 73) && 27 <= y)) || (((84 <= x && x <= 84) && y <= 16) && 16 <= y)) || (((59 <= x && 41 <= y) && y <= 41) && x <= 59)) || ((18 <= x && x + y <= 36) && (49 <= y || (8 <= y && x <= y && 3 <= y)))) || ((48 <= x && y <= 48) && (x <= y && 19 <= y) && 42 <= y)) || ((30 <= x && y <= 30) && x <= y && 19 <= y)) || (((31 <= y && y <= 31) && 69 <= x) && x <= 69)) || ((34 <= x && x + y <= 68) && x <= y && 19 <= y)) || (((86 <= x && y <= 14) && x <= 86) && 14 <= y)) || (((21 <= y && y <= 21) && x <= 79) && 79 <= x)) || (((52 <= x && x <= 52) && y <= 48) && 48 <= y)) || (((y <= 40 && x <= 60) && 60 <= x) && 40 <= y)) || (((y <= 13 && 13 <= y) && x <= 87) && 87 <= x)) || ((26 <= x && x <= y && 19 <= y) && x + y <= 52)) || ((y <= 20 && 20 <= x) && x <= y && 19 <= y)) || (((y <= 20 && x <= 80) && 20 <= y) && 80 <= x)) || (((x <= 81 && 81 <= x) && y <= 19) && 19 <= y)) || ((x + y <= 54 && 27 <= x) && 27 <= y)) || ((42 <= x && y <= 42) && (x <= y && 19 <= y) && 42 <= y)) || (((38 <= y && 62 <= x) && x <= 62) && y <= 38)) || (((28 <= y && y <= 28) && 72 <= x) && x <= 72)) || (((y <= 9 && 9 <= y) && 91 <= x) && x <= 91)) || (((x <= 51 && 49 <= y) && 51 <= x) && y <= 49)) || ((11 <= x && x + y <= 22) && 11 <= y)) || (((97 <= x && x <= 97) && y <= 3) && 3 <= y)) || (((71 <= x && 29 <= y) && x <= 71) && y <= 29)) || (((x <= 67 && 67 <= x) && 33 <= y) && y <= 33)) || (((15 <= y && x <= 85) && 85 <= x) && y <= 15)) || ((12 <= x && (49 <= y || (8 <= y && x <= y && 3 <= y))) && y <= 12)) || ((47 <= x && y <= 47) && (x <= y && 19 <= y) && 42 <= y)) || (((y <= 35 && 35 <= y) && x <= 65) && 65 <= x)) || ((15 <= x && (49 <= y || (8 <= y && x <= y && 3 <= y))) && y <= 15)) || (((49 <= y || (8 <= y && x <= y && 3 <= y)) && 17 <= x) && y <= 17)) || ((7 <= x && x + y <= 14) && 7 <= y)) || (((93 <= x && 7 <= y) && x <= 93) && y <= 7)) || ((y <= 9 && 9 <= x) && (49 <= y || (8 <= y && x <= y && 3 <= y)))) || ((32 <= x && y <= 32) && x <= y && 19 <= y)) || ((5 <= x && x + y <= 10) && 5 <= y)) || ((37 <= x && x <= y && 19 <= y) && x + y <= 74)) || ((24 <= x && y <= 24) && x <= y && 19 <= y)) || ((x <= y && x + y <= 4) && 2 <= x)) || (((49 <= y || (8 <= y && x <= y && 3 <= y)) && 8 <= x) && x + y <= 16)) || ((39 <= x && x + y <= 78) && x <= y && 19 <= y)) || (((x <= y && 3 <= y) && 4 <= x) && x + y <= 8)) || ((36 <= x && x <= y && 19 <= y) && y <= 36)) || (((y <= 1 && 1 <= y) && 99 <= x) && x <= 99)) || ((29 <= x && x + y <= 58) && x <= y && 19 <= y)) || ((38 <= x && x <= y && 19 <= y) && y <= 38)) || ((14 <= x && x + y <= 28) && 14 <= y)) || (((x <= 61 && y <= 39) && 39 <= y) && 61 <= x)) || ((23 <= x && y <= 23) && x <= y && 19 <= y)) || (((x <= 57 && 57 <= x) && y <= 43) && 43 <= y)) || ((33 <= x && y <= 33) && x <= y && 19 <= y)) || (((x <= 83 && 17 <= y) && 83 <= x) && y <= 17)) || (((x <= 58 && 42 <= y) && 58 <= x) && y <= 42)) || (((x <= 92 && 92 <= x) && 8 <= y) && y <= 8)) || ((1 <= x && 1 <= y) && x + y <= 2)) || (((66 <= x && y <= 34) && x <= 66) && 34 <= y)) || ((45 <= x && y <= 45) && (x <= y && 19 <= y) && 42 <= y)) || (((x <= 90 && 90 <= x) && y <= 10) && 10 <= y)) || ((49 <= x && (x <= y && 19 <= y) && 42 <= y) && y <= 49)) || ((y <= 44 && 44 <= x) && (x <= y && 19 <= y) && 42 <= y)) || (((36 <= y && x <= 64) && 64 <= x) && y <= 36)) || ((x + y <= 0 && 0 <= x) && 0 <= y)) || (((12 <= y && x <= 88) && y <= 12) && 88 <= x)) || ((3 <= x && 3 <= y) && x + y <= 6)) || ((19 <= x && y <= 19) && x <= y && 19 <= y)) || (((y <= 21 && 21 <= x) && 21 <= y) && x <= 21)) || ((25 <= x && x + y <= 50) && x <= y && 19 <= y)) || (((x <= 76 && 76 <= x) && y <= 24) && 24 <= y)) || ((28 <= x && y <= 28) && x <= y && 19 <= y)) || (((x <= 53 && 47 <= y) && 53 <= x) && y <= 47)) || (((x <= 77 && 77 <= x) && y <= 23) && 23 <= y)) || (((44 <= y && 56 <= x) && x <= 56) && y <= 44)) || ((10 <= x && y <= 10) && (49 <= y || (8 <= y && x <= y && 3 <= y)))) || ((40 <= x && x + y <= 80) && 40 <= y)) || ((x + y <= 26 && (49 <= y || (8 <= y && x <= y && 3 <= y))) && 13 <= x)) || ((31 <= x && y <= 31) && x <= y && 19 <= y)) || ((50 <= x && y <= 50) && (x <= y && 19 <= y) && 42 <= y)) || (((y <= 18 && 82 <= x) && 18 <= y) && x <= 82)) || (((y <= 5 && 5 <= y) && x <= 95) && 95 <= x)) || ((x + y <= 92 && (x <= y && 19 <= y) && 42 <= y) && 46 <= x)) || (((y <= 22 && 22 <= y) && x <= 78) && 78 <= x)) || ((y <= 16 && 16 <= x) && (49 <= y || (8 <= y && x <= y && 3 <= y)))) || (((37 <= y && y <= 37) && 63 <= x) && x <= 63)) || (((55 <= x && 45 <= y) && y <= 45) && x <= 55)) || (((y <= 11 && 89 <= x) && x <= 89) && 11 <= y)) || (((x <= 70 && y <= 30) && 70 <= x) && 30 <= y)) || (((x <= 94 && 6 <= y) && 94 <= x) && y <= 6)) || (((x <= 68 && y <= 32) && 32 <= y) && 68 <= x)) || (((y <= 25 && 75 <= x) && 25 <= y) && x <= 75)) || ((43 <= x && y <= 43) && (x <= y && 19 <= y) && 42 <= y)) || ((22 <= x && x <= y && 19 <= y) && x + y <= 44)) || (((2 <= y && y <= 2) && 98 <= x) && x <= 98)) || ((x + y <= 70 && x <= y && 19 <= y) && 35 <= x)) || (((y <= 0 && 100 <= x) && 0 <= y) && x <= 100)) || (((x <= 74 && y <= 26) && 26 <= y) && 74 <= x)) || (((y <= 4 && x <= 96) && 96 <= x) && 4 <= y)) || (((y <= 46 && 54 <= x) && 46 <= y) && x <= 54)) || ((41 <= y && 41 <= x) && x + y <= 82) - InvariantResult [Line: 3]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Result: SAFE, OverallTime: 394.4s, OverallIterations: 58, TraceHistogramMax: 103, AutomataDifference: 152.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 25.0s, HoareTripleCheckerStatistics: 761 SDtfs, 3169 SDslu, 32263 SDs, 0 SdLazy, 54091 SolverSat, 9323 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 21.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16503 GetRequests, 8490 SyntacticMatches, 0 SemanticMatches, 8013 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409512 ImplicationChecksByTransitivity, 306.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4185occurred in iteration=57, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.9s AutomataMinimizationTime, 58 MinimizatonAttempts, 19604 StatesRemovedByMinimization, 50 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 150 NumberOfFragments, 1478 HoareAnnotationTreeSize, 3 FomulaSimplifications, 1387465 FormulaSimplificationTreeSizeReduction, 13.3s HoareSimplificationTime, 3 FomulaSimplificationsInter, 59061 FormulaSimplificationTreeSizeReductionInter, 11.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.8s SsaConstructionTime, 4.3s SatisfiabilityAnalysisTime, 194.6s InterpolantComputationTime, 19028 NumberOfCodeBlocks, 18950 NumberOfCodeBlocksAsserted, 1655 NumberOfCheckSat, 18916 ConstructedInterpolants, 0 QuantifiedInterpolants, 12997228 SizeOfPredicates, 56 NumberOfNonLiveVariables, 21720 ConjunctsInSsa, 1772 ConjunctsInUnsatCore, 112 InterpolantComputations, 4 PerfectInterpolantSequences, 369946/665343 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...