./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 678e0110 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_26f463c5-ba64-45ad-9005-5020e8eb6451/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_26f463c5-ba64-45ad-9005-5020e8eb6451/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_26f463c5-ba64-45ad-9005-5020e8eb6451/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_26f463c5-ba64-45ad-9005-5020e8eb6451/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c -s /tmp/vcloud-vcloud-master/worker/run_dir_26f463c5-ba64-45ad-9005-5020e8eb6451/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_26f463c5-ba64-45ad-9005-5020e8eb6451/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 6b6f4e5c37e0d12f37f76e733ff40f1e207ca2c4 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 09:57:04,808 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 09:57:04,810 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 09:57:04,824 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 09:57:04,824 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 09:57:04,826 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 09:57:04,827 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 09:57:04,835 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 09:57:04,840 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 09:57:04,844 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 09:57:04,845 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 09:57:04,846 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 09:57:04,847 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 09:57:04,849 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 09:57:04,850 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 09:57:04,851 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 09:57:04,851 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 09:57:04,852 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 09:57:04,855 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 09:57:04,858 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 09:57:04,862 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 09:57:04,863 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 09:57:04,866 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 09:57:04,867 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 09:57:04,871 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 09:57:04,871 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 09:57:04,871 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 09:57:04,872 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 09:57:04,873 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 09:57:04,874 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 09:57:04,874 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 09:57:04,874 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 09:57:04,875 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 09:57:04,876 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 09:57:04,877 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 09:57:04,877 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 09:57:04,877 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 09:57:04,878 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 09:57:04,878 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 09:57:04,879 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 09:57:04,880 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 09:57:04,880 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_26f463c5-ba64-45ad-9005-5020e8eb6451/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-20 09:57:04,903 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 09:57:04,913 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 09:57:04,915 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 09:57:04,915 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 09:57:04,915 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 09:57:04,915 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 09:57:04,916 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 09:57:04,916 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 09:57:04,916 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 09:57:04,916 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 09:57:04,916 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-20 09:57:04,917 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 09:57:04,917 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-20 09:57:04,917 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 09:57:04,917 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 09:57:04,917 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 09:57:04,918 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-20 09:57:04,918 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 09:57:04,919 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 09:57:04,919 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 09:57:04,919 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 09:57:04,920 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 09:57:04,920 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 09:57:04,920 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 09:57:04,920 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-20 09:57:04,921 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-20 09:57:04,921 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-20 09:57:04,921 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-20 09:57:04,921 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_26f463c5-ba64-45ad-9005-5020e8eb6451/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 -> 6b6f4e5c37e0d12f37f76e733ff40f1e207ca2c4 [2019-11-20 09:57:05,090 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 09:57:05,105 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 09:57:05,107 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 09:57:05,109 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 09:57:05,109 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 09:57:05,110 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_26f463c5-ba64-45ad-9005-5020e8eb6451/bin/uautomizer/../../sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c [2019-11-20 09:57:05,168 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_26f463c5-ba64-45ad-9005-5020e8eb6451/bin/uautomizer/data/9e8781ed0/df45b0b569d74473b7e3876ee3dd25ee/FLAG3753b7d3b [2019-11-20 09:57:05,567 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 09:57:05,567 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_26f463c5-ba64-45ad-9005-5020e8eb6451/sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c [2019-11-20 09:57:05,573 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_26f463c5-ba64-45ad-9005-5020e8eb6451/bin/uautomizer/data/9e8781ed0/df45b0b569d74473b7e3876ee3dd25ee/FLAG3753b7d3b [2019-11-20 09:57:05,586 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_26f463c5-ba64-45ad-9005-5020e8eb6451/bin/uautomizer/data/9e8781ed0/df45b0b569d74473b7e3876ee3dd25ee [2019-11-20 09:57:05,589 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 09:57:05,590 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 09:57:05,594 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 09:57:05,595 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 09:57:05,598 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 09:57:05,599 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:57:05" (1/1) ... [2019-11-20 09:57:05,602 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1187cc41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:57:05, skipping insertion in model container [2019-11-20 09:57:05,602 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:57:05" (1/1) ... [2019-11-20 09:57:05,614 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 09:57:05,631 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 09:57:05,814 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 09:57:05,818 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 09:57:05,893 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 09:57:05,911 INFO L192 MainTranslator]: Completed translation [2019-11-20 09:57:05,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:57:05 WrapperNode [2019-11-20 09:57:05,912 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 09:57:05,913 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 09:57:05,913 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 09:57:05,913 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 09:57:05,921 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:57:05" (1/1) ... [2019-11-20 09:57:05,926 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:57:05" (1/1) ... [2019-11-20 09:57:05,943 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 09:57:05,943 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 09:57:05,943 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 09:57:05,943 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 09:57:05,951 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:57:05" (1/1) ... [2019-11-20 09:57:05,952 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:57:05" (1/1) ... [2019-11-20 09:57:05,953 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:57:05" (1/1) ... [2019-11-20 09:57:05,953 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:57:05" (1/1) ... [2019-11-20 09:57:05,955 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:57:05" (1/1) ... [2019-11-20 09:57:05,959 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:57:05" (1/1) ... [2019-11-20 09:57:05,960 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:57:05" (1/1) ... [2019-11-20 09:57:05,962 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 09:57:05,962 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 09:57:05,962 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 09:57:05,962 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 09:57:05,963 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:57:05" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26f463c5-ba64-45ad-9005-5020e8eb6451/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 09:57:06,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 09:57:06,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 09:57:06,374 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 09:57:06,374 INFO L285 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-20 09:57:06,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:57:06 BoogieIcfgContainer [2019-11-20 09:57:06,376 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 09:57:06,377 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 09:57:06,377 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 09:57:06,379 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 09:57:06,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:57:05" (1/3) ... [2019-11-20 09:57:06,380 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55787509 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:57:06, skipping insertion in model container [2019-11-20 09:57:06,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:57:05" (2/3) ... [2019-11-20 09:57:06,381 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55787509 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:57:06, skipping insertion in model container [2019-11-20 09:57:06,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:57:06" (3/3) ... [2019-11-20 09:57:06,382 INFO L109 eAbstractionObserver]: Analyzing ICFG nested_delay_nd.c [2019-11-20 09:57:06,392 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 09:57:06,398 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-20 09:57:06,409 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-20 09:57:06,437 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 09:57:06,438 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-20 09:57:06,439 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 09:57:06,439 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 09:57:06,439 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 09:57:06,439 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 09:57:06,440 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 09:57:06,441 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 09:57:06,455 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-11-20 09:57:06,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-20 09:57:06,460 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 09:57:06,461 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 09:57:06,461 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 09:57:06,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:57:06,466 INFO L82 PathProgramCache]: Analyzing trace with hash -265415979, now seen corresponding path program 1 times [2019-11-20 09:57:06,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:57:06,475 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474389763] [2019-11-20 09:57:06,475 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:57:06,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:57:06,609 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 09:57:06,610 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474389763] [2019-11-20 09:57:06,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 09:57:06,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-20 09:57:06,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933632701] [2019-11-20 09:57:06,616 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 09:57:06,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 09:57:06,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 09:57:06,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-20 09:57:06,627 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 4 states. [2019-11-20 09:57:06,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 09:57:06,735 INFO L93 Difference]: Finished difference Result 34 states and 58 transitions. [2019-11-20 09:57:06,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-20 09:57:06,739 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2019-11-20 09:57:06,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 09:57:06,746 INFO L225 Difference]: With dead ends: 34 [2019-11-20 09:57:06,747 INFO L226 Difference]: Without dead ends: 18 [2019-11-20 09:57:06,751 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-20 09:57:06,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-20 09:57:06,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 15. [2019-11-20 09:57:06,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-20 09:57:06,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 21 transitions. [2019-11-20 09:57:06,779 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 21 transitions. Word has length 10 [2019-11-20 09:57:06,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 09:57:06,780 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 21 transitions. [2019-11-20 09:57:06,780 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 09:57:06,780 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 21 transitions. [2019-11-20 09:57:06,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-20 09:57:06,781 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 09:57:06,781 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 09:57:06,781 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 09:57:06,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:57:06,781 INFO L82 PathProgramCache]: Analyzing trace with hash 2136724782, now seen corresponding path program 1 times [2019-11-20 09:57:06,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:57:06,782 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548298618] [2019-11-20 09:57:06,782 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:57:06,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:57:06,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:57:06,827 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548298618] [2019-11-20 09:57:06,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 09:57:06,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-20 09:57:06,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650193302] [2019-11-20 09:57:06,829 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 09:57:06,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 09:57:06,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 09:57:06,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-20 09:57:06,832 INFO L87 Difference]: Start difference. First operand 15 states and 21 transitions. Second operand 4 states. [2019-11-20 09:57:06,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 09:57:06,896 INFO L93 Difference]: Finished difference Result 31 states and 44 transitions. [2019-11-20 09:57:06,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-20 09:57:06,897 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-11-20 09:57:06,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 09:57:06,898 INFO L225 Difference]: With dead ends: 31 [2019-11-20 09:57:06,898 INFO L226 Difference]: Without dead ends: 18 [2019-11-20 09:57:06,898 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-20 09:57:06,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-20 09:57:06,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2019-11-20 09:57:06,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-20 09:57:06,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2019-11-20 09:57:06,902 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 13 [2019-11-20 09:57:06,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 09:57:06,902 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2019-11-20 09:57:06,902 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 09:57:06,902 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2019-11-20 09:57:06,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-20 09:57:06,903 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 09:57:06,903 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 09:57:06,903 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 09:57:06,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:57:06,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1478184144, now seen corresponding path program 1 times [2019-11-20 09:57:06,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:57:06,904 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685206102] [2019-11-20 09:57:06,904 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:57:06,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:57:06,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 09:57:06,934 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685206102] [2019-11-20 09:57:06,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 09:57:06,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-20 09:57:06,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055836486] [2019-11-20 09:57:06,935 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 09:57:06,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 09:57:06,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 09:57:06,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 09:57:06,936 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 3 states. [2019-11-20 09:57:06,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 09:57:06,968 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2019-11-20 09:57:06,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 09:57:06,968 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-11-20 09:57:06,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 09:57:06,969 INFO L225 Difference]: With dead ends: 42 [2019-11-20 09:57:06,969 INFO L226 Difference]: Without dead ends: 28 [2019-11-20 09:57:06,970 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 09:57:06,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-20 09:57:06,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 21. [2019-11-20 09:57:06,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-20 09:57:06,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 29 transitions. [2019-11-20 09:57:06,974 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 29 transitions. Word has length 13 [2019-11-20 09:57:06,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 09:57:06,975 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 29 transitions. [2019-11-20 09:57:06,975 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 09:57:06,975 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 29 transitions. [2019-11-20 09:57:06,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-20 09:57:06,976 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 09:57:06,976 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 09:57:06,976 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 09:57:06,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:57:06,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1047433017, now seen corresponding path program 1 times [2019-11-20 09:57:06,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:57:06,977 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520419076] [2019-11-20 09:57:06,977 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:57:06,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:57:07,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:57:07,086 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520419076] [2019-11-20 09:57:07,087 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24662565] [2019-11-20 09:57:07,087 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26f463c5-ba64-45ad-9005-5020e8eb6451/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 09:57:07,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:57:07,125 INFO L255 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-20 09:57:07,130 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:57:07,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:57:07,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 09:57:07,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2019-11-20 09:57:07,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558017231] [2019-11-20 09:57:07,187 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 09:57:07,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 09:57:07,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 09:57:07,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-11-20 09:57:07,188 INFO L87 Difference]: Start difference. First operand 21 states and 29 transitions. Second operand 10 states. [2019-11-20 09:57:07,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 09:57:07,438 INFO L93 Difference]: Finished difference Result 70 states and 98 transitions. [2019-11-20 09:57:07,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-20 09:57:07,439 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-11-20 09:57:07,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 09:57:07,441 INFO L225 Difference]: With dead ends: 70 [2019-11-20 09:57:07,441 INFO L226 Difference]: Without dead ends: 51 [2019-11-20 09:57:07,442 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2019-11-20 09:57:07,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-20 09:57:07,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 23. [2019-11-20 09:57:07,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-20 09:57:07,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2019-11-20 09:57:07,449 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 14 [2019-11-20 09:57:07,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 09:57:07,449 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2019-11-20 09:57:07,449 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 09:57:07,449 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2019-11-20 09:57:07,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-20 09:57:07,450 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 09:57:07,450 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 09:57:07,652 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 09:57:07,653 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 09:57:07,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:57:07,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1825215219, now seen corresponding path program 1 times [2019-11-20 09:57:07,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:57:07,653 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900130637] [2019-11-20 09:57:07,653 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:57:07,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:57:07,694 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-20 09:57:07,694 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900130637] [2019-11-20 09:57:07,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 09:57:07,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-20 09:57:07,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527788281] [2019-11-20 09:57:07,695 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 09:57:07,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 09:57:07,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 09:57:07,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 09:57:07,696 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand 3 states. [2019-11-20 09:57:07,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 09:57:07,729 INFO L93 Difference]: Finished difference Result 52 states and 71 transitions. [2019-11-20 09:57:07,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 09:57:07,730 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-11-20 09:57:07,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 09:57:07,731 INFO L225 Difference]: With dead ends: 52 [2019-11-20 09:57:07,731 INFO L226 Difference]: Without dead ends: 31 [2019-11-20 09:57:07,732 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 09:57:07,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-20 09:57:07,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2019-11-20 09:57:07,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-20 09:57:07,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2019-11-20 09:57:07,737 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 16 [2019-11-20 09:57:07,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 09:57:07,737 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2019-11-20 09:57:07,737 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 09:57:07,738 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2019-11-20 09:57:07,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-20 09:57:07,738 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 09:57:07,738 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 09:57:07,739 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 09:57:07,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:57:07,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1882473521, now seen corresponding path program 1 times [2019-11-20 09:57:07,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:57:07,740 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382675808] [2019-11-20 09:57:07,740 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:57:07,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:57:07,778 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-20 09:57:07,779 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382675808] [2019-11-20 09:57:07,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 09:57:07,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-20 09:57:07,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484663232] [2019-11-20 09:57:07,780 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 09:57:07,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 09:57:07,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 09:57:07,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-20 09:57:07,780 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand 4 states. [2019-11-20 09:57:07,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 09:57:07,826 INFO L93 Difference]: Finished difference Result 65 states and 89 transitions. [2019-11-20 09:57:07,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-20 09:57:07,827 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2019-11-20 09:57:07,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 09:57:07,828 INFO L225 Difference]: With dead ends: 65 [2019-11-20 09:57:07,828 INFO L226 Difference]: Without dead ends: 44 [2019-11-20 09:57:07,829 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-20 09:57:07,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-20 09:57:07,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2019-11-20 09:57:07,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-20 09:57:07,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 58 transitions. [2019-11-20 09:57:07,837 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 58 transitions. Word has length 16 [2019-11-20 09:57:07,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 09:57:07,837 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 58 transitions. [2019-11-20 09:57:07,838 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 09:57:07,838 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 58 transitions. [2019-11-20 09:57:07,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-20 09:57:07,839 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 09:57:07,839 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 09:57:07,839 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 09:57:07,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:57:07,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1882533103, now seen corresponding path program 1 times [2019-11-20 09:57:07,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:57:07,840 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248399095] [2019-11-20 09:57:07,840 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:57:07,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:57:07,909 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:57:07,910 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248399095] [2019-11-20 09:57:07,910 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396208486] [2019-11-20 09:57:07,910 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26f463c5-ba64-45ad-9005-5020e8eb6451/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 09:57:07,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:57:07,943 INFO L255 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-20 09:57:07,944 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:57:08,003 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:57:08,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 09:57:08,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2019-11-20 09:57:08,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539914698] [2019-11-20 09:57:08,005 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 09:57:08,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 09:57:08,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 09:57:08,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-11-20 09:57:08,006 INFO L87 Difference]: Start difference. First operand 42 states and 58 transitions. Second operand 10 states. [2019-11-20 09:57:08,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 09:57:08,351 INFO L93 Difference]: Finished difference Result 161 states and 229 transitions. [2019-11-20 09:57:08,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-20 09:57:08,352 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2019-11-20 09:57:08,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 09:57:08,353 INFO L225 Difference]: With dead ends: 161 [2019-11-20 09:57:08,353 INFO L226 Difference]: Without dead ends: 121 [2019-11-20 09:57:08,354 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2019-11-20 09:57:08,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-11-20 09:57:08,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 82. [2019-11-20 09:57:08,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-11-20 09:57:08,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 111 transitions. [2019-11-20 09:57:08,379 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 111 transitions. Word has length 16 [2019-11-20 09:57:08,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 09:57:08,379 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 111 transitions. [2019-11-20 09:57:08,380 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 09:57:08,380 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 111 transitions. [2019-11-20 09:57:08,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-20 09:57:08,381 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 09:57:08,382 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 09:57:08,585 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 09:57:08,586 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 09:57:08,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:57:08,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1169498870, now seen corresponding path program 2 times [2019-11-20 09:57:08,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:57:08,587 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15116648] [2019-11-20 09:57:08,587 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:57:08,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:57:08,668 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:57:08,668 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15116648] [2019-11-20 09:57:08,669 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759446858] [2019-11-20 09:57:08,669 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26f463c5-ba64-45ad-9005-5020e8eb6451/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 09:57:08,704 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 09:57:08,705 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 09:57:08,706 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 09:57:08,707 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:57:08,793 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:57:08,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 09:57:08,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2019-11-20 09:57:08,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40077995] [2019-11-20 09:57:08,795 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-20 09:57:08,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 09:57:08,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-20 09:57:08,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2019-11-20 09:57:08,796 INFO L87 Difference]: Start difference. First operand 82 states and 111 transitions. Second operand 13 states. [2019-11-20 09:57:09,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 09:57:09,007 INFO L93 Difference]: Finished difference Result 221 states and 305 transitions. [2019-11-20 09:57:09,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-20 09:57:09,010 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 19 [2019-11-20 09:57:09,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 09:57:09,011 INFO L225 Difference]: With dead ends: 221 [2019-11-20 09:57:09,011 INFO L226 Difference]: Without dead ends: 141 [2019-11-20 09:57:09,012 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2019-11-20 09:57:09,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-11-20 09:57:09,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 84. [2019-11-20 09:57:09,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-11-20 09:57:09,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 115 transitions. [2019-11-20 09:57:09,042 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 115 transitions. Word has length 19 [2019-11-20 09:57:09,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 09:57:09,043 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 115 transitions. [2019-11-20 09:57:09,043 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-20 09:57:09,043 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 115 transitions. [2019-11-20 09:57:09,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-20 09:57:09,044 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 09:57:09,044 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 09:57:09,255 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 09:57:09,256 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 09:57:09,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:57:09,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1258172505, now seen corresponding path program 1 times [2019-11-20 09:57:09,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:57:09,257 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882196664] [2019-11-20 09:57:09,257 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:57:09,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:57:09,304 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-20 09:57:09,305 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882196664] [2019-11-20 09:57:09,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 09:57:09,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-20 09:57:09,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33186280] [2019-11-20 09:57:09,306 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 09:57:09,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 09:57:09,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 09:57:09,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-20 09:57:09,307 INFO L87 Difference]: Start difference. First operand 84 states and 115 transitions. Second operand 4 states. [2019-11-20 09:57:09,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 09:57:09,335 INFO L93 Difference]: Finished difference Result 146 states and 199 transitions. [2019-11-20 09:57:09,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 09:57:09,336 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2019-11-20 09:57:09,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 09:57:09,337 INFO L225 Difference]: With dead ends: 146 [2019-11-20 09:57:09,337 INFO L226 Difference]: Without dead ends: 104 [2019-11-20 09:57:09,340 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-20 09:57:09,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-11-20 09:57:09,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 88. [2019-11-20 09:57:09,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-11-20 09:57:09,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 117 transitions. [2019-11-20 09:57:09,380 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 117 transitions. Word has length 20 [2019-11-20 09:57:09,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 09:57:09,380 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 117 transitions. [2019-11-20 09:57:09,381 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 09:57:09,381 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 117 transitions. [2019-11-20 09:57:09,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-20 09:57:09,383 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 09:57:09,383 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 09:57:09,383 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 09:57:09,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:57:09,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1256265881, now seen corresponding path program 1 times [2019-11-20 09:57:09,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:57:09,384 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887684189] [2019-11-20 09:57:09,384 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:57:09,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:57:09,461 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:57:09,461 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887684189] [2019-11-20 09:57:09,462 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676866645] [2019-11-20 09:57:09,462 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26f463c5-ba64-45ad-9005-5020e8eb6451/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 09:57:09,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:57:09,508 INFO L255 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 09:57:09,510 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:57:09,561 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:57:09,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 09:57:09,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-11-20 09:57:09,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337118533] [2019-11-20 09:57:09,563 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-20 09:57:09,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 09:57:09,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-20 09:57:09,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-11-20 09:57:09,563 INFO L87 Difference]: Start difference. First operand 88 states and 117 transitions. Second operand 11 states. [2019-11-20 09:57:09,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 09:57:09,658 INFO L93 Difference]: Finished difference Result 205 states and 273 transitions. [2019-11-20 09:57:09,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 09:57:09,659 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2019-11-20 09:57:09,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 09:57:09,660 INFO L225 Difference]: With dead ends: 205 [2019-11-20 09:57:09,660 INFO L226 Difference]: Without dead ends: 119 [2019-11-20 09:57:09,661 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-11-20 09:57:09,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-11-20 09:57:09,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 98. [2019-11-20 09:57:09,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-11-20 09:57:09,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 129 transitions. [2019-11-20 09:57:09,672 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 129 transitions. Word has length 20 [2019-11-20 09:57:09,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 09:57:09,672 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 129 transitions. [2019-11-20 09:57:09,672 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-20 09:57:09,673 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 129 transitions. [2019-11-20 09:57:09,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-20 09:57:09,673 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 09:57:09,681 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 09:57:09,893 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 09:57:09,893 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 09:57:09,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:57:09,893 INFO L82 PathProgramCache]: Analyzing trace with hash 203649807, now seen corresponding path program 3 times [2019-11-20 09:57:09,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:57:09,894 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826853013] [2019-11-20 09:57:09,894 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:57:09,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:57:09,981 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:57:09,982 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826853013] [2019-11-20 09:57:09,982 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144794610] [2019-11-20 09:57:09,982 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26f463c5-ba64-45ad-9005-5020e8eb6451/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 09:57:10,021 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-20 09:57:10,021 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 09:57:10,022 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-20 09:57:10,023 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:57:10,049 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-20 09:57:10,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-20 09:57:10,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 11 [2019-11-20 09:57:10,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78880805] [2019-11-20 09:57:10,050 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 09:57:10,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 09:57:10,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 09:57:10,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-11-20 09:57:10,051 INFO L87 Difference]: Start difference. First operand 98 states and 129 transitions. Second operand 4 states. [2019-11-20 09:57:10,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 09:57:10,094 INFO L93 Difference]: Finished difference Result 222 states and 290 transitions. [2019-11-20 09:57:10,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-20 09:57:10,094 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2019-11-20 09:57:10,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 09:57:10,095 INFO L225 Difference]: With dead ends: 222 [2019-11-20 09:57:10,096 INFO L226 Difference]: Without dead ends: 126 [2019-11-20 09:57:10,096 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-11-20 09:57:10,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-11-20 09:57:10,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 108. [2019-11-20 09:57:10,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-11-20 09:57:10,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 135 transitions. [2019-11-20 09:57:10,107 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 135 transitions. Word has length 22 [2019-11-20 09:57:10,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 09:57:10,108 INFO L462 AbstractCegarLoop]: Abstraction has 108 states and 135 transitions. [2019-11-20 09:57:10,108 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 09:57:10,108 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 135 transitions. [2019-11-20 09:57:10,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-20 09:57:10,109 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 09:57:10,109 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 09:57:10,320 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 09:57:10,321 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 09:57:10,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:57:10,321 INFO L82 PathProgramCache]: Analyzing trace with hash -617261500, now seen corresponding path program 2 times [2019-11-20 09:57:10,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:57:10,321 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937949933] [2019-11-20 09:57:10,322 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:57:10,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:57:10,390 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:57:10,391 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937949933] [2019-11-20 09:57:10,391 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695472789] [2019-11-20 09:57:10,391 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26f463c5-ba64-45ad-9005-5020e8eb6451/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 09:57:10,420 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 09:57:10,420 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 09:57:10,421 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 09:57:10,422 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:57:10,474 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:57:10,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 09:57:10,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2019-11-20 09:57:10,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886512921] [2019-11-20 09:57:10,475 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-20 09:57:10,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 09:57:10,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-20 09:57:10,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2019-11-20 09:57:10,476 INFO L87 Difference]: Start difference. First operand 108 states and 135 transitions. Second operand 13 states. [2019-11-20 09:57:10,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 09:57:10,577 INFO L93 Difference]: Finished difference Result 257 states and 325 transitions. [2019-11-20 09:57:10,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-20 09:57:10,578 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 23 [2019-11-20 09:57:10,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 09:57:10,579 INFO L225 Difference]: With dead ends: 257 [2019-11-20 09:57:10,579 INFO L226 Difference]: Without dead ends: 151 [2019-11-20 09:57:10,580 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2019-11-20 09:57:10,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-11-20 09:57:10,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 130. [2019-11-20 09:57:10,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-11-20 09:57:10,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 161 transitions. [2019-11-20 09:57:10,590 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 161 transitions. Word has length 23 [2019-11-20 09:57:10,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 09:57:10,591 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 161 transitions. [2019-11-20 09:57:10,591 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-20 09:57:10,591 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 161 transitions. [2019-11-20 09:57:10,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-20 09:57:10,592 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 09:57:10,592 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 09:57:10,796 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 09:57:10,796 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 09:57:10,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:57:10,796 INFO L82 PathProgramCache]: Analyzing trace with hash 667196999, now seen corresponding path program 3 times [2019-11-20 09:57:10,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:57:10,797 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809876151] [2019-11-20 09:57:10,797 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:57:10,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:57:10,885 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:57:10,885 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809876151] [2019-11-20 09:57:10,886 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588047079] [2019-11-20 09:57:10,886 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26f463c5-ba64-45ad-9005-5020e8eb6451/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 09:57:10,924 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-20 09:57:10,925 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 09:57:10,926 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-20 09:57:10,928 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:57:11,016 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 09:57:11,041 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-20 09:57:11,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-20 09:57:11,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 15 [2019-11-20 09:57:11,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269896412] [2019-11-20 09:57:11,042 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-20 09:57:11,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 09:57:11,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-20 09:57:11,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2019-11-20 09:57:11,043 INFO L87 Difference]: Start difference. First operand 130 states and 161 transitions. Second operand 8 states. [2019-11-20 09:57:11,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 09:57:11,157 INFO L93 Difference]: Finished difference Result 290 states and 357 transitions. [2019-11-20 09:57:11,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-20 09:57:11,157 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2019-11-20 09:57:11,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 09:57:11,159 INFO L225 Difference]: With dead ends: 290 [2019-11-20 09:57:11,159 INFO L226 Difference]: Without dead ends: 288 [2019-11-20 09:57:11,160 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2019-11-20 09:57:11,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2019-11-20 09:57:11,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 181. [2019-11-20 09:57:11,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2019-11-20 09:57:11,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 222 transitions. [2019-11-20 09:57:11,175 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 222 transitions. Word has length 26 [2019-11-20 09:57:11,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 09:57:11,175 INFO L462 AbstractCegarLoop]: Abstraction has 181 states and 222 transitions. [2019-11-20 09:57:11,175 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-20 09:57:11,175 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 222 transitions. [2019-11-20 09:57:11,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-20 09:57:11,176 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 09:57:11,177 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 09:57:11,388 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 09:57:11,389 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 09:57:11,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:57:11,389 INFO L82 PathProgramCache]: Analyzing trace with hash 477144837, now seen corresponding path program 1 times [2019-11-20 09:57:11,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:57:11,389 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230645565] [2019-11-20 09:57:11,389 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:57:11,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:57:11,463 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-20 09:57:11,463 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230645565] [2019-11-20 09:57:11,463 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926292666] [2019-11-20 09:57:11,464 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26f463c5-ba64-45ad-9005-5020e8eb6451/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 09:57:11,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:57:11,494 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 09:57:11,495 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:57:11,595 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:57:11,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 09:57:11,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2019-11-20 09:57:11,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158411229] [2019-11-20 09:57:11,596 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-20 09:57:11,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 09:57:11,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-20 09:57:11,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2019-11-20 09:57:11,597 INFO L87 Difference]: Start difference. First operand 181 states and 222 transitions. Second operand 15 states. [2019-11-20 09:57:12,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 09:57:12,016 INFO L93 Difference]: Finished difference Result 483 states and 604 transitions. [2019-11-20 09:57:12,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-20 09:57:12,021 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 26 [2019-11-20 09:57:12,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 09:57:12,023 INFO L225 Difference]: With dead ends: 483 [2019-11-20 09:57:12,023 INFO L226 Difference]: Without dead ends: 337 [2019-11-20 09:57:12,024 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=256, Invalid=614, Unknown=0, NotChecked=0, Total=870 [2019-11-20 09:57:12,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2019-11-20 09:57:12,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 205. [2019-11-20 09:57:12,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2019-11-20 09:57:12,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 251 transitions. [2019-11-20 09:57:12,040 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 251 transitions. Word has length 26 [2019-11-20 09:57:12,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 09:57:12,041 INFO L462 AbstractCegarLoop]: Abstraction has 205 states and 251 transitions. [2019-11-20 09:57:12,041 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-20 09:57:12,041 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 251 transitions. [2019-11-20 09:57:12,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-20 09:57:12,042 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 09:57:12,042 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 09:57:12,246 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 09:57:12,246 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 09:57:12,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:57:12,247 INFO L82 PathProgramCache]: Analyzing trace with hash 2135503200, now seen corresponding path program 2 times [2019-11-20 09:57:12,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:57:12,247 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714108108] [2019-11-20 09:57:12,247 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:57:12,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:57:12,318 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-20 09:57:12,318 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714108108] [2019-11-20 09:57:12,318 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929523036] [2019-11-20 09:57:12,318 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26f463c5-ba64-45ad-9005-5020e8eb6451/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 09:57:12,358 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 09:57:12,358 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 09:57:12,359 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-20 09:57:12,361 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:57:12,460 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-20 09:57:12,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 09:57:12,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2019-11-20 09:57:12,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554902203] [2019-11-20 09:57:12,461 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-20 09:57:12,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 09:57:12,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-20 09:57:12,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2019-11-20 09:57:12,462 INFO L87 Difference]: Start difference. First operand 205 states and 251 transitions. Second operand 17 states. [2019-11-20 09:57:12,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 09:57:12,706 INFO L93 Difference]: Finished difference Result 424 states and 525 transitions. [2019-11-20 09:57:12,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-20 09:57:12,707 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 29 [2019-11-20 09:57:12,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 09:57:12,709 INFO L225 Difference]: With dead ends: 424 [2019-11-20 09:57:12,709 INFO L226 Difference]: Without dead ends: 278 [2019-11-20 09:57:12,710 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2019-11-20 09:57:12,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-11-20 09:57:12,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 199. [2019-11-20 09:57:12,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2019-11-20 09:57:12,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 245 transitions. [2019-11-20 09:57:12,725 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 245 transitions. Word has length 29 [2019-11-20 09:57:12,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 09:57:12,726 INFO L462 AbstractCegarLoop]: Abstraction has 199 states and 245 transitions. [2019-11-20 09:57:12,726 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-20 09:57:12,726 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 245 transitions. [2019-11-20 09:57:12,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-20 09:57:12,727 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 09:57:12,727 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 09:57:12,930 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 09:57:12,934 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 09:57:12,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:57:12,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1548697186, now seen corresponding path program 3 times [2019-11-20 09:57:12,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:57:12,934 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807690987] [2019-11-20 09:57:12,934 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:57:12,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:57:13,038 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:57:13,038 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807690987] [2019-11-20 09:57:13,038 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095514961] [2019-11-20 09:57:13,039 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26f463c5-ba64-45ad-9005-5020e8eb6451/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 09:57:13,069 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-20 09:57:13,069 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 09:57:13,070 INFO L255 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-20 09:57:13,071 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:57:13,157 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 09:57:13,170 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-20 09:57:13,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-20 09:57:13,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 17 [2019-11-20 09:57:13,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569314448] [2019-11-20 09:57:13,171 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-20 09:57:13,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 09:57:13,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-20 09:57:13,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2019-11-20 09:57:13,172 INFO L87 Difference]: Start difference. First operand 199 states and 245 transitions. Second operand 8 states. [2019-11-20 09:57:13,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 09:57:13,346 INFO L93 Difference]: Finished difference Result 258 states and 315 transitions. [2019-11-20 09:57:13,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-20 09:57:13,346 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2019-11-20 09:57:13,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 09:57:13,348 INFO L225 Difference]: With dead ends: 258 [2019-11-20 09:57:13,348 INFO L226 Difference]: Without dead ends: 256 [2019-11-20 09:57:13,348 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2019-11-20 09:57:13,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2019-11-20 09:57:13,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 199. [2019-11-20 09:57:13,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2019-11-20 09:57:13,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 245 transitions. [2019-11-20 09:57:13,363 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 245 transitions. Word has length 29 [2019-11-20 09:57:13,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 09:57:13,364 INFO L462 AbstractCegarLoop]: Abstraction has 199 states and 245 transitions. [2019-11-20 09:57:13,364 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-20 09:57:13,364 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 245 transitions. [2019-11-20 09:57:13,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-20 09:57:13,365 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 09:57:13,365 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 09:57:13,568 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 09:57:13,568 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 09:57:13,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:57:13,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1366196382, now seen corresponding path program 2 times [2019-11-20 09:57:13,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:57:13,569 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444209721] [2019-11-20 09:57:13,569 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:57:13,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:57:13,688 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:57:13,689 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444209721] [2019-11-20 09:57:13,689 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363150647] [2019-11-20 09:57:13,689 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26f463c5-ba64-45ad-9005-5020e8eb6451/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 09:57:13,714 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-20 09:57:13,715 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 09:57:13,716 INFO L255 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-20 09:57:13,723 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:57:13,774 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-11-20 09:57:13,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-20 09:57:13,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [12] total 14 [2019-11-20 09:57:13,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098920434] [2019-11-20 09:57:13,775 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-20 09:57:13,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 09:57:13,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 09:57:13,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2019-11-20 09:57:13,775 INFO L87 Difference]: Start difference. First operand 199 states and 245 transitions. Second operand 5 states. [2019-11-20 09:57:13,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 09:57:13,820 INFO L93 Difference]: Finished difference Result 345 states and 426 transitions. [2019-11-20 09:57:13,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 09:57:13,820 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2019-11-20 09:57:13,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 09:57:13,822 INFO L225 Difference]: With dead ends: 345 [2019-11-20 09:57:13,822 INFO L226 Difference]: Without dead ends: 273 [2019-11-20 09:57:13,823 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2019-11-20 09:57:13,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2019-11-20 09:57:13,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 231. [2019-11-20 09:57:13,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2019-11-20 09:57:13,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 286 transitions. [2019-11-20 09:57:13,840 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 286 transitions. Word has length 29 [2019-11-20 09:57:13,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 09:57:13,841 INFO L462 AbstractCegarLoop]: Abstraction has 231 states and 286 transitions. [2019-11-20 09:57:13,841 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-20 09:57:13,841 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 286 transitions. [2019-11-20 09:57:13,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-20 09:57:13,843 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 09:57:13,843 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 10, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2019-11-20 09:57:14,046 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 09:57:14,046 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 09:57:14,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:57:14,046 INFO L82 PathProgramCache]: Analyzing trace with hash 531419276, now seen corresponding path program 1 times [2019-11-20 09:57:14,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:57:14,047 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48614906] [2019-11-20 09:57:14,047 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:57:14,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:57:14,265 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 34 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:57:14,266 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48614906] [2019-11-20 09:57:14,266 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805827543] [2019-11-20 09:57:14,266 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26f463c5-ba64-45ad-9005-5020e8eb6451/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 09:57:14,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:57:14,299 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-20 09:57:14,301 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:57:14,446 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 122 proven. 51 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-20 09:57:14,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 09:57:14,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9] total 25 [2019-11-20 09:57:14,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484795592] [2019-11-20 09:57:14,448 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-20 09:57:14,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 09:57:14,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-20 09:57:14,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2019-11-20 09:57:14,449 INFO L87 Difference]: Start difference. First operand 231 states and 286 transitions. Second operand 26 states. [2019-11-20 09:57:14,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 09:57:14,851 INFO L93 Difference]: Finished difference Result 551 states and 679 transitions. [2019-11-20 09:57:14,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-20 09:57:14,852 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 55 [2019-11-20 09:57:14,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 09:57:14,854 INFO L225 Difference]: With dead ends: 551 [2019-11-20 09:57:14,854 INFO L226 Difference]: Without dead ends: 359 [2019-11-20 09:57:14,855 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=308, Invalid=1098, Unknown=0, NotChecked=0, Total=1406 [2019-11-20 09:57:14,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2019-11-20 09:57:14,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 266. [2019-11-20 09:57:14,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2019-11-20 09:57:14,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 327 transitions. [2019-11-20 09:57:14,882 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 327 transitions. Word has length 55 [2019-11-20 09:57:14,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 09:57:14,882 INFO L462 AbstractCegarLoop]: Abstraction has 266 states and 327 transitions. [2019-11-20 09:57:14,882 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-20 09:57:14,882 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 327 transitions. [2019-11-20 09:57:14,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-20 09:57:14,883 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 09:57:14,883 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 12, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2019-11-20 09:57:15,087 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 09:57:15,087 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 09:57:15,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:57:15,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1993539556, now seen corresponding path program 2 times [2019-11-20 09:57:15,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:57:15,090 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643156387] [2019-11-20 09:57:15,090 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:57:15,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:57:15,387 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 39 proven. 270 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:57:15,390 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643156387] [2019-11-20 09:57:15,391 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428960945] [2019-11-20 09:57:15,391 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26f463c5-ba64-45ad-9005-5020e8eb6451/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 09:57:15,441 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 09:57:15,441 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 09:57:15,442 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 09:57:15,446 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:57:15,612 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 163 proven. 70 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2019-11-20 09:57:15,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 09:57:15,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10] total 28 [2019-11-20 09:57:15,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23103726] [2019-11-20 09:57:15,613 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-20 09:57:15,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 09:57:15,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-20 09:57:15,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2019-11-20 09:57:15,614 INFO L87 Difference]: Start difference. First operand 266 states and 327 transitions. Second operand 29 states. [2019-11-20 09:57:16,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 09:57:16,049 INFO L93 Difference]: Finished difference Result 644 states and 783 transitions. [2019-11-20 09:57:16,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-20 09:57:16,053 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 61 [2019-11-20 09:57:16,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 09:57:16,056 INFO L225 Difference]: With dead ends: 644 [2019-11-20 09:57:16,056 INFO L226 Difference]: Without dead ends: 425 [2019-11-20 09:57:16,057 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=1543, Unknown=0, NotChecked=0, Total=1980 [2019-11-20 09:57:16,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2019-11-20 09:57:16,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 305. [2019-11-20 09:57:16,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2019-11-20 09:57:16,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 372 transitions. [2019-11-20 09:57:16,079 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 372 transitions. Word has length 61 [2019-11-20 09:57:16,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 09:57:16,080 INFO L462 AbstractCegarLoop]: Abstraction has 305 states and 372 transitions. [2019-11-20 09:57:16,080 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-20 09:57:16,080 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 372 transitions. [2019-11-20 09:57:16,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-20 09:57:16,081 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 09:57:16,081 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 14, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2019-11-20 09:57:16,283 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 09:57:16,284 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 09:57:16,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:57:16,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1561582796, now seen corresponding path program 3 times [2019-11-20 09:57:16,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:57:16,284 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253884519] [2019-11-20 09:57:16,284 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:57:16,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:57:16,547 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 44 proven. 356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:57:16,547 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253884519] [2019-11-20 09:57:16,547 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17263273] [2019-11-20 09:57:16,547 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26f463c5-ba64-45ad-9005-5020e8eb6451/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 09:57:16,588 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-20 09:57:16,588 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 09:57:16,589 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-20 09:57:16,590 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:57:16,695 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 09:57:16,740 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 22 proven. 216 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2019-11-20 09:57:16,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 09:57:16,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 9] total 30 [2019-11-20 09:57:16,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765508755] [2019-11-20 09:57:16,742 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-20 09:57:16,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 09:57:16,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-20 09:57:16,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=725, Unknown=0, NotChecked=0, Total=870 [2019-11-20 09:57:16,743 INFO L87 Difference]: Start difference. First operand 305 states and 372 transitions. Second operand 30 states. [2019-11-20 09:57:21,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 09:57:21,144 INFO L93 Difference]: Finished difference Result 1614 states and 1904 transitions. [2019-11-20 09:57:21,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2019-11-20 09:57:21,145 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 67 [2019-11-20 09:57:21,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 09:57:21,152 INFO L225 Difference]: With dead ends: 1614 [2019-11-20 09:57:21,152 INFO L226 Difference]: Without dead ends: 1512 [2019-11-20 09:57:21,160 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11671 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4550, Invalid=24180, Unknown=0, NotChecked=0, Total=28730 [2019-11-20 09:57:21,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1512 states. [2019-11-20 09:57:21,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1512 to 644. [2019-11-20 09:57:21,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 644 states. [2019-11-20 09:57:21,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 755 transitions. [2019-11-20 09:57:21,221 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 755 transitions. Word has length 67 [2019-11-20 09:57:21,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 09:57:21,222 INFO L462 AbstractCegarLoop]: Abstraction has 644 states and 755 transitions. [2019-11-20 09:57:21,222 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-20 09:57:21,222 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 755 transitions. [2019-11-20 09:57:21,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-20 09:57:21,223 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 09:57:21,223 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 10, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 09:57:21,426 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 09:57:21,426 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 09:57:21,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:57:21,426 INFO L82 PathProgramCache]: Analyzing trace with hash -577843254, now seen corresponding path program 1 times [2019-11-20 09:57:21,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:57:21,426 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099214240] [2019-11-20 09:57:21,426 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:57:21,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:57:21,853 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 26 proven. 374 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:57:21,853 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099214240] [2019-11-20 09:57:21,854 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677181231] [2019-11-20 09:57:21,854 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26f463c5-ba64-45ad-9005-5020e8eb6451/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 09:57:21,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:57:21,910 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-20 09:57:21,913 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:57:22,224 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 92 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-11-20 09:57:22,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 09:57:22,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 11] total 34 [2019-11-20 09:57:22,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553445643] [2019-11-20 09:57:22,227 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-20 09:57:22,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 09:57:22,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-20 09:57:22,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=982, Unknown=0, NotChecked=0, Total=1190 [2019-11-20 09:57:22,228 INFO L87 Difference]: Start difference. First operand 644 states and 755 transitions. Second operand 35 states. [2019-11-20 09:57:25,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 09:57:25,045 INFO L93 Difference]: Finished difference Result 2064 states and 2515 transitions. [2019-11-20 09:57:25,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2019-11-20 09:57:25,045 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 67 [2019-11-20 09:57:25,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 09:57:25,051 INFO L225 Difference]: With dead ends: 2064 [2019-11-20 09:57:25,051 INFO L226 Difference]: Without dead ends: 1493 [2019-11-20 09:57:25,056 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4387 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2552, Invalid=11728, Unknown=0, NotChecked=0, Total=14280 [2019-11-20 09:57:25,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1493 states. [2019-11-20 09:57:25,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1493 to 501. [2019-11-20 09:57:25,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 501 states. [2019-11-20 09:57:25,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 608 transitions. [2019-11-20 09:57:25,100 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 608 transitions. Word has length 67 [2019-11-20 09:57:25,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 09:57:25,100 INFO L462 AbstractCegarLoop]: Abstraction has 501 states and 608 transitions. [2019-11-20 09:57:25,101 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-20 09:57:25,101 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 608 transitions. [2019-11-20 09:57:25,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-11-20 09:57:25,101 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 09:57:25,101 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 12, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 09:57:25,302 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 09:57:25,302 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 09:57:25,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:57:25,302 INFO L82 PathProgramCache]: Analyzing trace with hash 2091458462, now seen corresponding path program 2 times [2019-11-20 09:57:25,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:57:25,302 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076646425] [2019-11-20 09:57:25,302 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:57:25,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:57:25,620 INFO L134 CoverageAnalysis]: Checked inductivity of 503 backedges. 34 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:57:25,621 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076646425] [2019-11-20 09:57:25,621 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485458938] [2019-11-20 09:57:25,621 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26f463c5-ba64-45ad-9005-5020e8eb6451/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 09:57:25,653 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 09:57:25,653 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 09:57:25,653 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-20 09:57:25,654 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:57:25,927 INFO L134 CoverageAnalysis]: Checked inductivity of 503 backedges. 263 proven. 117 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2019-11-20 09:57:25,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 09:57:25,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 12] total 37 [2019-11-20 09:57:25,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263193975] [2019-11-20 09:57:25,928 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-11-20 09:57:25,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 09:57:25,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-11-20 09:57:25,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1168, Unknown=0, NotChecked=0, Total=1406 [2019-11-20 09:57:25,929 INFO L87 Difference]: Start difference. First operand 501 states and 608 transitions. Second operand 38 states. [2019-11-20 09:57:29,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 09:57:29,483 INFO L93 Difference]: Finished difference Result 1888 states and 2315 transitions. [2019-11-20 09:57:29,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2019-11-20 09:57:29,486 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 73 [2019-11-20 09:57:29,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 09:57:29,490 INFO L225 Difference]: With dead ends: 1888 [2019-11-20 09:57:29,490 INFO L226 Difference]: Without dead ends: 1452 [2019-11-20 09:57:29,493 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5281 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3026, Invalid=14004, Unknown=0, NotChecked=0, Total=17030 [2019-11-20 09:57:29,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1452 states. [2019-11-20 09:57:29,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1452 to 558. [2019-11-20 09:57:29,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2019-11-20 09:57:29,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 674 transitions. [2019-11-20 09:57:29,545 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 674 transitions. Word has length 73 [2019-11-20 09:57:29,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 09:57:29,545 INFO L462 AbstractCegarLoop]: Abstraction has 558 states and 674 transitions. [2019-11-20 09:57:29,545 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-11-20 09:57:29,545 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 674 transitions. [2019-11-20 09:57:29,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-11-20 09:57:29,546 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 09:57:29,547 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 14, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 09:57:29,749 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 09:57:29,749 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 09:57:29,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:57:29,749 INFO L82 PathProgramCache]: Analyzing trace with hash 2051483018, now seen corresponding path program 3 times [2019-11-20 09:57:29,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:57:29,750 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325354498] [2019-11-20 09:57:29,750 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:57:29,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:57:30,108 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 45 proven. 573 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:57:30,109 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325354498] [2019-11-20 09:57:30,109 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478052442] [2019-11-20 09:57:30,109 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26f463c5-ba64-45ad-9005-5020e8eb6451/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 09:57:30,139 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-20 09:57:30,139 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 09:57:30,140 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 09:57:30,141 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:57:30,282 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 355 proven. 1 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2019-11-20 09:57:30,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 09:57:30,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 8] total 36 [2019-11-20 09:57:30,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380146324] [2019-11-20 09:57:30,283 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-20 09:57:30,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 09:57:30,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-20 09:57:30,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1091, Unknown=0, NotChecked=0, Total=1260 [2019-11-20 09:57:30,284 INFO L87 Difference]: Start difference. First operand 558 states and 674 transitions. Second operand 36 states. [2019-11-20 09:57:34,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 09:57:34,276 INFO L93 Difference]: Finished difference Result 1624 states and 1959 transitions. [2019-11-20 09:57:34,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2019-11-20 09:57:34,276 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 79 [2019-11-20 09:57:34,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 09:57:34,280 INFO L225 Difference]: With dead ends: 1624 [2019-11-20 09:57:34,280 INFO L226 Difference]: Without dead ends: 1293 [2019-11-20 09:57:34,282 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7234 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3500, Invalid=18256, Unknown=0, NotChecked=0, Total=21756 [2019-11-20 09:57:34,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1293 states. [2019-11-20 09:57:34,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1293 to 916. [2019-11-20 09:57:34,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 916 states. [2019-11-20 09:57:34,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1070 transitions. [2019-11-20 09:57:34,353 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1070 transitions. Word has length 79 [2019-11-20 09:57:34,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 09:57:34,353 INFO L462 AbstractCegarLoop]: Abstraction has 916 states and 1070 transitions. [2019-11-20 09:57:34,354 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-20 09:57:34,354 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1070 transitions. [2019-11-20 09:57:34,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-11-20 09:57:34,355 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 09:57:34,355 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 10, 10, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 09:57:34,557 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 09:57:34,558 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 09:57:34,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:57:34,558 INFO L82 PathProgramCache]: Analyzing trace with hash -741345910, now seen corresponding path program 4 times [2019-11-20 09:57:34,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:57:34,558 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547982612] [2019-11-20 09:57:34,558 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:57:34,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:57:34,805 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 31 proven. 547 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-20 09:57:34,805 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547982612] [2019-11-20 09:57:34,806 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190258521] [2019-11-20 09:57:34,806 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26f463c5-ba64-45ad-9005-5020e8eb6451/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 09:57:34,838 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 09:57:34,838 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 09:57:34,839 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-20 09:57:34,839 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:57:35,233 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 297 proven. 295 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-20 09:57:35,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 09:57:35,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 41 [2019-11-20 09:57:35,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850453470] [2019-11-20 09:57:35,234 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-11-20 09:57:35,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 09:57:35,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-11-20 09:57:35,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1435, Unknown=0, NotChecked=0, Total=1640 [2019-11-20 09:57:35,234 INFO L87 Difference]: Start difference. First operand 916 states and 1070 transitions. Second operand 41 states. [2019-11-20 09:57:38,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 09:57:38,644 INFO L93 Difference]: Finished difference Result 2607 states and 3032 transitions. [2019-11-20 09:57:38,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2019-11-20 09:57:38,645 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 79 [2019-11-20 09:57:38,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 09:57:38,653 INFO L225 Difference]: With dead ends: 2607 [2019-11-20 09:57:38,653 INFO L226 Difference]: Without dead ends: 1933 [2019-11-20 09:57:38,655 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4517 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2905, Invalid=13097, Unknown=0, NotChecked=0, Total=16002 [2019-11-20 09:57:38,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1933 states. [2019-11-20 09:57:38,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1933 to 629. [2019-11-20 09:57:38,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 629 states. [2019-11-20 09:57:38,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 743 transitions. [2019-11-20 09:57:38,717 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 743 transitions. Word has length 79 [2019-11-20 09:57:38,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 09:57:38,718 INFO L462 AbstractCegarLoop]: Abstraction has 629 states and 743 transitions. [2019-11-20 09:57:38,718 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-11-20 09:57:38,718 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 743 transitions. [2019-11-20 09:57:38,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-11-20 09:57:38,719 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 09:57:38,719 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 15, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2019-11-20 09:57:38,922 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 09:57:38,923 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 09:57:38,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:57:38,923 INFO L82 PathProgramCache]: Analyzing trace with hash -216004410, now seen corresponding path program 1 times [2019-11-20 09:57:38,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:57:38,923 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594166443] [2019-11-20 09:57:38,923 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:57:38,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:57:39,307 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 103 proven. 513 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-20 09:57:39,307 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594166443] [2019-11-20 09:57:39,307 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558468460] [2019-11-20 09:57:39,307 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26f463c5-ba64-45ad-9005-5020e8eb6451/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 09:57:39,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:57:39,345 INFO L255 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-20 09:57:39,345 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:57:39,608 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 322 proven. 145 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2019-11-20 09:57:39,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 09:57:39,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 13] total 40 [2019-11-20 09:57:39,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557990156] [2019-11-20 09:57:39,609 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-11-20 09:57:39,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 09:57:39,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-11-20 09:57:39,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1402, Unknown=0, NotChecked=0, Total=1640 [2019-11-20 09:57:39,610 INFO L87 Difference]: Start difference. First operand 629 states and 743 transitions. Second operand 41 states. [2019-11-20 09:57:41,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 09:57:41,795 INFO L93 Difference]: Finished difference Result 1572 states and 1864 transitions. [2019-11-20 09:57:41,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2019-11-20 09:57:41,796 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 79 [2019-11-20 09:57:41,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 09:57:41,800 INFO L225 Difference]: With dead ends: 1572 [2019-11-20 09:57:41,800 INFO L226 Difference]: Without dead ends: 877 [2019-11-20 09:57:41,802 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4014 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2656, Invalid=10226, Unknown=0, NotChecked=0, Total=12882 [2019-11-20 09:57:41,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2019-11-20 09:57:41,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 766. [2019-11-20 09:57:41,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 766 states. [2019-11-20 09:57:41,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 898 transitions. [2019-11-20 09:57:41,850 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 898 transitions. Word has length 79 [2019-11-20 09:57:41,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 09:57:41,850 INFO L462 AbstractCegarLoop]: Abstraction has 766 states and 898 transitions. [2019-11-20 09:57:41,850 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-11-20 09:57:41,851 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 898 transitions. [2019-11-20 09:57:41,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-11-20 09:57:41,852 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 09:57:41,852 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 12, 10, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 09:57:42,054 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 09:57:42,055 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 09:57:42,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:57:42,055 INFO L82 PathProgramCache]: Analyzing trace with hash 600454234, now seen corresponding path program 5 times [2019-11-20 09:57:42,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:57:42,055 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868180364] [2019-11-20 09:57:42,055 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:57:42,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:57:42,335 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 31 proven. 657 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-20 09:57:42,335 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868180364] [2019-11-20 09:57:42,335 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938400821] [2019-11-20 09:57:42,336 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26f463c5-ba64-45ad-9005-5020e8eb6451/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 09:57:42,376 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-11-20 09:57:42,376 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 09:57:42,377 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-20 09:57:42,378 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:57:42,612 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 387 proven. 176 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2019-11-20 09:57:42,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 09:57:42,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 14] total 35 [2019-11-20 09:57:42,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908291088] [2019-11-20 09:57:42,613 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-20 09:57:42,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 09:57:42,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-20 09:57:42,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1034, Unknown=0, NotChecked=0, Total=1260 [2019-11-20 09:57:42,614 INFO L87 Difference]: Start difference. First operand 766 states and 898 transitions. Second operand 36 states. [2019-11-20 09:57:43,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 09:57:43,170 INFO L93 Difference]: Finished difference Result 1632 states and 1925 transitions. [2019-11-20 09:57:43,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-11-20 09:57:43,171 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 85 [2019-11-20 09:57:43,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 09:57:43,174 INFO L225 Difference]: With dead ends: 1632 [2019-11-20 09:57:43,174 INFO L226 Difference]: Without dead ends: 951 [2019-11-20 09:57:43,175 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 917 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=763, Invalid=2543, Unknown=0, NotChecked=0, Total=3306 [2019-11-20 09:57:43,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2019-11-20 09:57:43,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 841. [2019-11-20 09:57:43,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 841 states. [2019-11-20 09:57:43,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 979 transitions. [2019-11-20 09:57:43,227 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 979 transitions. Word has length 85 [2019-11-20 09:57:43,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 09:57:43,227 INFO L462 AbstractCegarLoop]: Abstraction has 841 states and 979 transitions. [2019-11-20 09:57:43,227 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-20 09:57:43,227 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 979 transitions. [2019-11-20 09:57:43,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-20 09:57:43,228 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 09:57:43,228 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 12, 12, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 09:57:43,430 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 09:57:43,431 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 09:57:43,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:57:43,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1846584762, now seen corresponding path program 6 times [2019-11-20 09:57:43,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:57:43,431 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359930046] [2019-11-20 09:57:43,432 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:57:43,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:57:43,872 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 45 proven. 782 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-20 09:57:43,872 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359930046] [2019-11-20 09:57:43,872 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984395045] [2019-11-20 09:57:43,872 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26f463c5-ba64-45ad-9005-5020e8eb6451/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 09:57:43,909 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-11-20 09:57:43,909 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 09:57:43,910 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-20 09:57:43,911 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:57:44,042 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 09:57:44,083 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 34 proven. 464 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2019-11-20 09:57:44,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 09:57:44,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9] total 33 [2019-11-20 09:57:44,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605369820] [2019-11-20 09:57:44,084 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-20 09:57:44,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 09:57:44,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-20 09:57:44,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=925, Unknown=0, NotChecked=0, Total=1056 [2019-11-20 09:57:44,085 INFO L87 Difference]: Start difference. First operand 841 states and 979 transitions. Second operand 33 states. [2019-11-20 09:57:48,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 09:57:48,543 INFO L93 Difference]: Finished difference Result 2872 states and 3361 transitions. [2019-11-20 09:57:48,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2019-11-20 09:57:48,544 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 91 [2019-11-20 09:57:48,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 09:57:48,551 INFO L225 Difference]: With dead ends: 2872 [2019-11-20 09:57:48,551 INFO L226 Difference]: Without dead ends: 2354 [2019-11-20 09:57:48,552 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11608 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4196, Invalid=26254, Unknown=0, NotChecked=0, Total=30450 [2019-11-20 09:57:48,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2354 states. [2019-11-20 09:57:48,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2354 to 1005. [2019-11-20 09:57:48,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1005 states. [2019-11-20 09:57:48,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 1171 transitions. [2019-11-20 09:57:48,636 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 1171 transitions. Word has length 91 [2019-11-20 09:57:48,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 09:57:48,636 INFO L462 AbstractCegarLoop]: Abstraction has 1005 states and 1171 transitions. [2019-11-20 09:57:48,636 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-20 09:57:48,636 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 1171 transitions. [2019-11-20 09:57:48,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-20 09:57:48,637 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 09:57:48,637 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 18, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2019-11-20 09:57:48,840 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 09:57:48,841 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 09:57:48,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:57:48,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1046927688, now seen corresponding path program 2 times [2019-11-20 09:57:48,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:57:48,841 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407865128] [2019-11-20 09:57:48,841 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:57:48,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:57:49,525 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 166 proven. 716 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-20 09:57:49,526 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407865128] [2019-11-20 09:57:49,526 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175156501] [2019-11-20 09:57:49,526 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26f463c5-ba64-45ad-9005-5020e8eb6451/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 09:57:49,562 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 09:57:49,563 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 09:57:49,564 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-20 09:57:49,565 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:57:49,820 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 6 proven. 469 refuted. 0 times theorem prover too weak. 409 trivial. 0 not checked. [2019-11-20 09:57:49,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 09:57:49,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 12] total 43 [2019-11-20 09:57:49,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620827856] [2019-11-20 09:57:49,821 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-11-20 09:57:49,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 09:57:49,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-11-20 09:57:49,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=1639, Unknown=0, NotChecked=0, Total=1892 [2019-11-20 09:57:49,821 INFO L87 Difference]: Start difference. First operand 1005 states and 1171 transitions. Second operand 44 states. [2019-11-20 09:57:51,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 09:57:51,124 INFO L93 Difference]: Finished difference Result 2046 states and 2395 transitions. [2019-11-20 09:57:51,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2019-11-20 09:57:51,125 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 91 [2019-11-20 09:57:51,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 09:57:51,129 INFO L225 Difference]: With dead ends: 2046 [2019-11-20 09:57:51,129 INFO L226 Difference]: Without dead ends: 1430 [2019-11-20 09:57:51,131 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2563 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1417, Invalid=7139, Unknown=0, NotChecked=0, Total=8556 [2019-11-20 09:57:51,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1430 states. [2019-11-20 09:57:51,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1430 to 1109. [2019-11-20 09:57:51,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1109 states. [2019-11-20 09:57:51,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1109 states to 1109 states and 1303 transitions. [2019-11-20 09:57:51,212 INFO L78 Accepts]: Start accepts. Automaton has 1109 states and 1303 transitions. Word has length 91 [2019-11-20 09:57:51,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 09:57:51,212 INFO L462 AbstractCegarLoop]: Abstraction has 1109 states and 1303 transitions. [2019-11-20 09:57:51,213 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-11-20 09:57:51,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1109 states and 1303 transitions. [2019-11-20 09:57:51,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-20 09:57:51,214 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 09:57:51,214 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 19, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2019-11-20 09:57:51,414 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 09:57:51,414 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 09:57:51,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:57:51,414 INFO L82 PathProgramCache]: Analyzing trace with hash 314960262, now seen corresponding path program 3 times [2019-11-20 09:57:51,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:57:51,415 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852336480] [2019-11-20 09:57:51,415 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:57:51,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:57:51,894 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 152 proven. 730 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-20 09:57:51,895 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852336480] [2019-11-20 09:57:51,895 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559001379] [2019-11-20 09:57:51,895 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26f463c5-ba64-45ad-9005-5020e8eb6451/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 09:57:51,922 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-20 09:57:51,922 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 09:57:51,923 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-20 09:57:51,924 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:57:51,975 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 09:57:51,976 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 09:57:52,029 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 09:57:52,136 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 09:57:52,177 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 464 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2019-11-20 09:57:52,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 09:57:52,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 9] total 41 [2019-11-20 09:57:52,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609702089] [2019-11-20 09:57:52,177 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-11-20 09:57:52,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 09:57:52,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-11-20 09:57:52,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1460, Unknown=0, NotChecked=0, Total=1640 [2019-11-20 09:57:52,178 INFO L87 Difference]: Start difference. First operand 1109 states and 1303 transitions. Second operand 41 states. [2019-11-20 09:57:56,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 09:57:56,832 INFO L93 Difference]: Finished difference Result 1892 states and 2151 transitions. [2019-11-20 09:57:56,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2019-11-20 09:57:56,833 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 91 [2019-11-20 09:57:56,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 09:57:56,838 INFO L225 Difference]: With dead ends: 1892 [2019-11-20 09:57:56,838 INFO L226 Difference]: Without dead ends: 1568 [2019-11-20 09:57:56,840 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10041 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=4964, Invalid=23092, Unknown=0, NotChecked=0, Total=28056 [2019-11-20 09:57:56,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1568 states. [2019-11-20 09:57:56,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1568 to 1217. [2019-11-20 09:57:56,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1217 states. [2019-11-20 09:57:56,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1217 states to 1217 states and 1423 transitions. [2019-11-20 09:57:56,918 INFO L78 Accepts]: Start accepts. Automaton has 1217 states and 1423 transitions. Word has length 91 [2019-11-20 09:57:56,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 09:57:56,918 INFO L462 AbstractCegarLoop]: Abstraction has 1217 states and 1423 transitions. [2019-11-20 09:57:56,918 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-11-20 09:57:56,918 INFO L276 IsEmpty]: Start isEmpty. Operand 1217 states and 1423 transitions. [2019-11-20 09:57:56,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-20 09:57:56,920 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 09:57:56,920 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 21, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 09:57:57,122 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 09:57:57,122 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 09:57:57,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:57:57,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1277696966, now seen corresponding path program 1 times [2019-11-20 09:57:57,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:57:57,123 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321010079] [2019-11-20 09:57:57,123 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:57:57,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:57:57,826 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 134 proven. 750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:57:57,826 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321010079] [2019-11-20 09:57:57,827 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739992219] [2019-11-20 09:57:57,827 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26f463c5-ba64-45ad-9005-5020e8eb6451/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 09:57:57,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:57:57,871 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-20 09:57:57,872 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:57:58,205 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 458 proven. 210 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2019-11-20 09:57:58,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 09:57:58,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 15] total 48 [2019-11-20 09:57:58,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626506440] [2019-11-20 09:57:58,206 INFO L442 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-11-20 09:57:58,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 09:57:58,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-11-20 09:57:58,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=2012, Unknown=0, NotChecked=0, Total=2352 [2019-11-20 09:57:58,206 INFO L87 Difference]: Start difference. First operand 1217 states and 1423 transitions. Second operand 49 states. [2019-11-20 09:58:01,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 09:58:01,000 INFO L93 Difference]: Finished difference Result 2759 states and 3247 transitions. [2019-11-20 09:58:01,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2019-11-20 09:58:01,000 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 91 [2019-11-20 09:58:01,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 09:58:01,005 INFO L225 Difference]: With dead ends: 2759 [2019-11-20 09:58:01,005 INFO L226 Difference]: Without dead ends: 1429 [2019-11-20 09:58:01,007 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4588 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3209, Invalid=12291, Unknown=0, NotChecked=0, Total=15500 [2019-11-20 09:58:01,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1429 states. [2019-11-20 09:58:01,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1429 to 1101. [2019-11-20 09:58:01,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1101 states. [2019-11-20 09:58:01,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 1288 transitions. [2019-11-20 09:58:01,080 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 1288 transitions. Word has length 91 [2019-11-20 09:58:01,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 09:58:01,080 INFO L462 AbstractCegarLoop]: Abstraction has 1101 states and 1288 transitions. [2019-11-20 09:58:01,081 INFO L463 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-11-20 09:58:01,081 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 1288 transitions. [2019-11-20 09:58:01,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-11-20 09:58:01,082 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 09:58:01,082 INFO L410 BasicCegarLoop]: trace histogram [26, 26, 23, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 09:58:01,285 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 09:58:01,285 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 09:58:01,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:58:01,285 INFO L82 PathProgramCache]: Analyzing trace with hash 29715290, now seen corresponding path program 2 times [2019-11-20 09:58:01,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:58:01,286 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482091050] [2019-11-20 09:58:01,286 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:58:01,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:58:02,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 163 proven. 872 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:58:02,056 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482091050] [2019-11-20 09:58:02,057 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493671230] [2019-11-20 09:58:02,057 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26f463c5-ba64-45ad-9005-5020e8eb6451/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 09:58:02,091 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 09:58:02,091 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 09:58:02,092 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-20 09:58:02,093 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:58:02,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 535 proven. 247 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-11-20 09:58:02,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 09:58:02,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 16] total 51 [2019-11-20 09:58:02,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914531151] [2019-11-20 09:58:02,485 INFO L442 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-11-20 09:58:02,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 09:58:02,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-11-20 09:58:02,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=2261, Unknown=0, NotChecked=0, Total=2652 [2019-11-20 09:58:02,485 INFO L87 Difference]: Start difference. First operand 1101 states and 1288 transitions. Second operand 52 states. [2019-11-20 09:58:05,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 09:58:05,491 INFO L93 Difference]: Finished difference Result 2682 states and 3156 transitions. [2019-11-20 09:58:05,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2019-11-20 09:58:05,491 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 97 [2019-11-20 09:58:05,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 09:58:05,495 INFO L225 Difference]: With dead ends: 2682 [2019-11-20 09:58:05,496 INFO L226 Difference]: Without dead ends: 1454 [2019-11-20 09:58:05,497 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5278 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3643, Invalid=13913, Unknown=0, NotChecked=0, Total=17556 [2019-11-20 09:58:05,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2019-11-20 09:58:05,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 1182. [2019-11-20 09:58:05,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1182 states. [2019-11-20 09:58:05,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 1378 transitions. [2019-11-20 09:58:05,572 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 1378 transitions. Word has length 97 [2019-11-20 09:58:05,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 09:58:05,572 INFO L462 AbstractCegarLoop]: Abstraction has 1182 states and 1378 transitions. [2019-11-20 09:58:05,572 INFO L463 AbstractCegarLoop]: Interpolant automaton has 52 states. [2019-11-20 09:58:05,572 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 1378 transitions. [2019-11-20 09:58:05,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-11-20 09:58:05,573 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 09:58:05,573 INFO L410 BasicCegarLoop]: trace histogram [28, 28, 25, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 09:58:05,775 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 09:58:05,775 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 09:58:05,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:58:05,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1345277178, now seen corresponding path program 3 times [2019-11-20 09:58:05,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:58:05,776 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135308565] [2019-11-20 09:58:05,776 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:58:05,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:58:06,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1198 backedges. 195 proven. 1003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:58:06,395 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135308565] [2019-11-20 09:58:06,396 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369546342] [2019-11-20 09:58:06,396 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26f463c5-ba64-45ad-9005-5020e8eb6451/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 09:58:06,420 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-20 09:58:06,420 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 09:58:06,421 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-20 09:58:06,422 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:58:06,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1198 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 1136 trivial. 0 not checked. [2019-11-20 09:58:06,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-20 09:58:06,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [39] total 43 [2019-11-20 09:58:06,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652794363] [2019-11-20 09:58:06,501 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-20 09:58:06,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 09:58:06,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 09:58:06,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1581, Unknown=0, NotChecked=0, Total=1806 [2019-11-20 09:58:06,501 INFO L87 Difference]: Start difference. First operand 1182 states and 1378 transitions. Second operand 5 states. [2019-11-20 09:58:06,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 09:58:06,617 INFO L93 Difference]: Finished difference Result 1754 states and 2030 transitions. [2019-11-20 09:58:06,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 09:58:06,617 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 103 [2019-11-20 09:58:06,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 09:58:06,620 INFO L225 Difference]: With dead ends: 1754 [2019-11-20 09:58:06,620 INFO L226 Difference]: Without dead ends: 882 [2019-11-20 09:58:06,621 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=235, Invalid=1745, Unknown=0, NotChecked=0, Total=1980 [2019-11-20 09:58:06,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2019-11-20 09:58:06,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 785. [2019-11-20 09:58:06,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 785 states. [2019-11-20 09:58:06,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 887 transitions. [2019-11-20 09:58:06,672 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 887 transitions. Word has length 103 [2019-11-20 09:58:06,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 09:58:06,673 INFO L462 AbstractCegarLoop]: Abstraction has 785 states and 887 transitions. [2019-11-20 09:58:06,673 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-20 09:58:06,673 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 887 transitions. [2019-11-20 09:58:06,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-11-20 09:58:06,674 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 09:58:06,674 INFO L410 BasicCegarLoop]: trace histogram [28, 28, 25, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 09:58:06,876 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 09:58:06,876 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 09:58:06,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:58:06,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1343430136, now seen corresponding path program 7 times [2019-11-20 09:58:06,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:58:06,877 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914049111] [2019-11-20 09:58:06,877 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:58:06,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:58:07,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1198 backedges. 0 proven. 1198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:58:07,733 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914049111] [2019-11-20 09:58:07,733 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677239553] [2019-11-20 09:58:07,733 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26f463c5-ba64-45ad-9005-5020e8eb6451/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 09:58:07,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:58:07,774 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-20 09:58:07,775 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:58:08,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1198 backedges. 618 proven. 287 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2019-11-20 09:58:08,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 09:58:08,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 17] total 56 [2019-11-20 09:58:08,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23677769] [2019-11-20 09:58:08,211 INFO L442 AbstractCegarLoop]: Interpolant automaton has 57 states [2019-11-20 09:58:08,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 09:58:08,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2019-11-20 09:58:08,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=504, Invalid=2688, Unknown=0, NotChecked=0, Total=3192 [2019-11-20 09:58:08,212 INFO L87 Difference]: Start difference. First operand 785 states and 887 transitions. Second operand 57 states. [2019-11-20 09:58:16,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 09:58:16,637 INFO L93 Difference]: Finished difference Result 2769 states and 3190 transitions. [2019-11-20 09:58:16,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 187 states. [2019-11-20 09:58:16,637 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 103 [2019-11-20 09:58:16,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 09:58:16,644 INFO L225 Difference]: With dead ends: 2769 [2019-11-20 09:58:16,644 INFO L226 Difference]: Without dead ends: 2106 [2019-11-20 09:58:16,646 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17723 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=8157, Invalid=42693, Unknown=0, NotChecked=0, Total=50850 [2019-11-20 09:58:16,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2019-11-20 09:58:16,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 848. [2019-11-20 09:58:16,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 848 states. [2019-11-20 09:58:16,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 955 transitions. [2019-11-20 09:58:16,712 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 955 transitions. Word has length 103 [2019-11-20 09:58:16,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 09:58:16,712 INFO L462 AbstractCegarLoop]: Abstraction has 848 states and 955 transitions. [2019-11-20 09:58:16,712 INFO L463 AbstractCegarLoop]: Interpolant automaton has 57 states. [2019-11-20 09:58:16,712 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 955 transitions. [2019-11-20 09:58:16,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-11-20 09:58:16,713 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 09:58:16,713 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 26, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 09:58:16,914 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 09:58:16,914 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 09:58:16,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:58:16,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1300881630, now seen corresponding path program 8 times [2019-11-20 09:58:16,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:58:16,914 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674968908] [2019-11-20 09:58:16,914 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:58:16,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:58:18,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 0 proven. 1373 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:58:18,173 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674968908] [2019-11-20 09:58:18,174 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304356035] [2019-11-20 09:58:18,174 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26f463c5-ba64-45ad-9005-5020e8eb6451/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 09:58:18,211 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 09:58:18,211 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 09:58:18,212 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-20 09:58:18,213 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:58:18,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 176 proven. 852 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2019-11-20 09:58:18,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 09:58:18,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 16] total 58 [2019-11-20 09:58:18,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357072763] [2019-11-20 09:58:18,625 INFO L442 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-11-20 09:58:18,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 09:58:18,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-11-20 09:58:18,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=508, Invalid=2914, Unknown=0, NotChecked=0, Total=3422 [2019-11-20 09:58:18,626 INFO L87 Difference]: Start difference. First operand 848 states and 955 transitions. Second operand 59 states. [2019-11-20 09:58:23,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 09:58:23,210 INFO L93 Difference]: Finished difference Result 1650 states and 1862 transitions. [2019-11-20 09:58:23,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2019-11-20 09:58:23,211 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 109 [2019-11-20 09:58:23,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 09:58:23,216 INFO L225 Difference]: With dead ends: 1650 [2019-11-20 09:58:23,216 INFO L226 Difference]: Without dead ends: 1589 [2019-11-20 09:58:23,217 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7359 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=4802, Invalid=20638, Unknown=0, NotChecked=0, Total=25440 [2019-11-20 09:58:23,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2019-11-20 09:58:23,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 1091. [2019-11-20 09:58:23,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1091 states. [2019-11-20 09:58:23,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1091 states to 1091 states and 1236 transitions. [2019-11-20 09:58:23,297 INFO L78 Accepts]: Start accepts. Automaton has 1091 states and 1236 transitions. Word has length 109 [2019-11-20 09:58:23,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 09:58:23,297 INFO L462 AbstractCegarLoop]: Abstraction has 1091 states and 1236 transitions. [2019-11-20 09:58:23,298 INFO L463 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-11-20 09:58:23,298 INFO L276 IsEmpty]: Start isEmpty. Operand 1091 states and 1236 transitions. [2019-11-20 09:58:23,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-11-20 09:58:23,299 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 09:58:23,299 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 27, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 09:58:23,502 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 09:58:23,502 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 09:58:23,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:58:23,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1377782428, now seen corresponding path program 9 times [2019-11-20 09:58:23,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:58:23,503 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214287062] [2019-11-20 09:58:23,503 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:58:23,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:58:24,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 0 proven. 1373 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:58:24,725 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214287062] [2019-11-20 09:58:24,725 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017308832] [2019-11-20 09:58:24,725 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26f463c5-ba64-45ad-9005-5020e8eb6451/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 09:58:24,771 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-20 09:58:24,771 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 09:58:24,772 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-20 09:58:24,773 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:58:24,804 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 09:58:24,804 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 09:58:24,840 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 09:58:24,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 711 proven. 2 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2019-11-20 09:58:24,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 09:58:24,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 6] total 47 [2019-11-20 09:58:24,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821530523] [2019-11-20 09:58:24,897 INFO L442 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-11-20 09:58:24,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 09:58:24,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-11-20 09:58:24,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=1846, Unknown=0, NotChecked=0, Total=2162 [2019-11-20 09:58:24,898 INFO L87 Difference]: Start difference. First operand 1091 states and 1236 transitions. Second operand 47 states. [2019-11-20 09:58:37,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 09:58:37,499 INFO L93 Difference]: Finished difference Result 2960 states and 3354 transitions. [2019-11-20 09:58:37,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 264 states. [2019-11-20 09:58:37,499 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 109 [2019-11-20 09:58:37,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 09:58:37,512 INFO L225 Difference]: With dead ends: 2960 [2019-11-20 09:58:37,512 INFO L226 Difference]: Without dead ends: 2887 [2019-11-20 09:58:37,517 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 306 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36092 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=13535, Invalid=81021, Unknown=0, NotChecked=0, Total=94556 [2019-11-20 09:58:37,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2887 states. [2019-11-20 09:58:37,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2887 to 1173. [2019-11-20 09:58:37,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1173 states. [2019-11-20 09:58:37,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 1356 transitions. [2019-11-20 09:58:37,620 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 1356 transitions. Word has length 109 [2019-11-20 09:58:37,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 09:58:37,620 INFO L462 AbstractCegarLoop]: Abstraction has 1173 states and 1356 transitions. [2019-11-20 09:58:37,620 INFO L463 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-11-20 09:58:37,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 1356 transitions. [2019-11-20 09:58:37,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-11-20 09:58:37,623 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 09:58:37,623 INFO L410 BasicCegarLoop]: trace histogram [45, 45, 42, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1] [2019-11-20 09:58:37,826 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 09:58:37,826 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 09:58:37,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:58:37,826 INFO L82 PathProgramCache]: Analyzing trace with hash 816920519, now seen corresponding path program 4 times [2019-11-20 09:58:37,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:58:37,827 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223361993] [2019-11-20 09:58:37,827 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:58:37,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:58:38,891 INFO L134 CoverageAnalysis]: Checked inductivity of 3129 backedges. 94 proven. 3035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:58:38,891 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223361993] [2019-11-20 09:58:38,891 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854391864] [2019-11-20 09:58:38,891 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26f463c5-ba64-45ad-9005-5020e8eb6451/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 09:58:38,943 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 09:58:38,944 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 09:58:38,945 INFO L255 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 54 conjunts are in the unsatisfiable core [2019-11-20 09:58:38,947 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:58:39,418 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 09:58:40,146 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 09:58:40,216 INFO L134 CoverageAnalysis]: Checked inductivity of 3129 backedges. 1102 proven. 1696 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2019-11-20 09:58:40,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 09:58:40,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 38] total 90 [2019-11-20 09:58:40,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638694365] [2019-11-20 09:58:40,217 INFO L442 AbstractCegarLoop]: Interpolant automaton has 90 states [2019-11-20 09:58:40,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 09:58:40,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2019-11-20 09:58:40,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=834, Invalid=7176, Unknown=0, NotChecked=0, Total=8010 [2019-11-20 09:58:40,218 INFO L87 Difference]: Start difference. First operand 1173 states and 1356 transitions. Second operand 90 states. [2019-11-20 09:58:47,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 09:58:47,295 INFO L93 Difference]: Finished difference Result 2677 states and 3066 transitions. [2019-11-20 09:58:47,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2019-11-20 09:58:47,295 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 162 [2019-11-20 09:58:47,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 09:58:47,301 INFO L225 Difference]: With dead ends: 2677 [2019-11-20 09:58:47,301 INFO L226 Difference]: Without dead ends: 1660 [2019-11-20 09:58:47,304 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13964 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=4651, Invalid=41359, Unknown=0, NotChecked=0, Total=46010 [2019-11-20 09:58:47,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1660 states. [2019-11-20 09:58:47,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1660 to 1198. [2019-11-20 09:58:47,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1198 states. [2019-11-20 09:58:47,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 1386 transitions. [2019-11-20 09:58:47,406 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 1386 transitions. Word has length 162 [2019-11-20 09:58:47,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 09:58:47,406 INFO L462 AbstractCegarLoop]: Abstraction has 1198 states and 1386 transitions. [2019-11-20 09:58:47,406 INFO L463 AbstractCegarLoop]: Interpolant automaton has 90 states. [2019-11-20 09:58:47,406 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 1386 transitions. [2019-11-20 09:58:47,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-11-20 09:58:47,408 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 09:58:47,409 INFO L410 BasicCegarLoop]: trace histogram [48, 48, 45, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1] [2019-11-20 09:58:47,611 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 09:58:47,611 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 09:58:47,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:58:47,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1393473900, now seen corresponding path program 5 times [2019-11-20 09:58:47,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:58:47,612 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237843748] [2019-11-20 09:58:47,612 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:58:47,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:58:48,866 INFO L134 CoverageAnalysis]: Checked inductivity of 3552 backedges. 99 proven. 3453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:58:48,866 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237843748] [2019-11-20 09:58:48,866 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506551034] [2019-11-20 09:58:48,866 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26f463c5-ba64-45ad-9005-5020e8eb6451/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 09:58:48,939 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2019-11-20 09:58:48,939 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 09:58:48,941 INFO L255 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-20 09:58:48,949 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:58:49,548 INFO L134 CoverageAnalysis]: Checked inductivity of 3552 backedges. 1604 proven. 376 refuted. 0 times theorem prover too weak. 1572 trivial. 0 not checked. [2019-11-20 09:58:49,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 09:58:49,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 19] total 73 [2019-11-20 09:58:49,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909889370] [2019-11-20 09:58:49,549 INFO L442 AbstractCegarLoop]: Interpolant automaton has 74 states [2019-11-20 09:58:49,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 09:58:49,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2019-11-20 09:58:49,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=729, Invalid=4673, Unknown=0, NotChecked=0, Total=5402 [2019-11-20 09:58:49,549 INFO L87 Difference]: Start difference. First operand 1198 states and 1386 transitions. Second operand 74 states. [2019-11-20 09:58:51,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 09:58:51,684 INFO L93 Difference]: Finished difference Result 2746 states and 3148 transitions. [2019-11-20 09:58:51,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2019-11-20 09:58:51,685 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 171 [2019-11-20 09:58:51,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 09:58:51,688 INFO L225 Difference]: With dead ends: 2746 [2019-11-20 09:58:51,688 INFO L226 Difference]: Without dead ends: 1725 [2019-11-20 09:58:51,690 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4345 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2745, Invalid=12755, Unknown=0, NotChecked=0, Total=15500 [2019-11-20 09:58:51,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1725 states. [2019-11-20 09:58:51,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1725 to 1289. [2019-11-20 09:58:51,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1289 states. [2019-11-20 09:58:51,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1289 states to 1289 states and 1484 transitions. [2019-11-20 09:58:51,802 INFO L78 Accepts]: Start accepts. Automaton has 1289 states and 1484 transitions. Word has length 171 [2019-11-20 09:58:51,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 09:58:51,802 INFO L462 AbstractCegarLoop]: Abstraction has 1289 states and 1484 transitions. [2019-11-20 09:58:51,802 INFO L463 AbstractCegarLoop]: Interpolant automaton has 74 states. [2019-11-20 09:58:51,802 INFO L276 IsEmpty]: Start isEmpty. Operand 1289 states and 1484 transitions. [2019-11-20 09:58:51,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-11-20 09:58:51,805 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 09:58:51,805 INFO L410 BasicCegarLoop]: trace histogram [51, 51, 48, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1] [2019-11-20 09:58:52,009 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 09:58:52,009 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 09:58:52,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:58:52,009 INFO L82 PathProgramCache]: Analyzing trace with hash -2038057369, now seen corresponding path program 6 times [2019-11-20 09:58:52,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:58:52,009 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669729733] [2019-11-20 09:58:52,009 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:58:52,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:58:53,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4002 backedges. 104 proven. 3898 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:58:53,294 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669729733] [2019-11-20 09:58:53,294 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182901021] [2019-11-20 09:58:53,294 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26f463c5-ba64-45ad-9005-5020e8eb6451/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 09:58:53,328 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-11-20 09:58:53,329 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 09:58:53,329 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-20 09:58:53,332 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:58:53,413 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 09:58:53,564 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 09:58:53,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4002 backedges. 1867 proven. 1 refuted. 0 times theorem prover too weak. 2134 trivial. 0 not checked. [2019-11-20 09:58:53,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 09:58:53,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 8] total 66 [2019-11-20 09:58:53,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494571210] [2019-11-20 09:58:53,629 INFO L442 AbstractCegarLoop]: Interpolant automaton has 66 states [2019-11-20 09:58:53,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 09:58:53,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2019-11-20 09:58:53,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=614, Invalid=3676, Unknown=0, NotChecked=0, Total=4290 [2019-11-20 09:58:53,630 INFO L87 Difference]: Start difference. First operand 1289 states and 1484 transitions. Second operand 66 states. [2019-11-20 09:59:04,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 09:59:04,628 INFO L93 Difference]: Finished difference Result 2590 states and 2899 transitions. [2019-11-20 09:59:04,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 223 states. [2019-11-20 09:59:04,628 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 180 [2019-11-20 09:59:04,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 09:59:04,629 INFO L225 Difference]: With dead ends: 2590 [2019-11-20 09:59:04,629 INFO L226 Difference]: Without dead ends: 0 [2019-11-20 09:59:04,632 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 284 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30690 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=21024, Invalid=60486, Unknown=0, NotChecked=0, Total=81510 [2019-11-20 09:59:04,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-20 09:59:04,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-20 09:59:04,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-20 09:59:04,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-20 09:59:04,632 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 180 [2019-11-20 09:59:04,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 09:59:04,632 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 09:59:04,632 INFO L463 AbstractCegarLoop]: Interpolant automaton has 66 states. [2019-11-20 09:59:04,632 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-20 09:59:04,633 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-20 09:59:04,835 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 09:59:04,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-20 10:01:19,681 WARN L191 SmtUtils]: Spent 2.25 m on a formula simplification. DAG size of input: 5970 DAG size of output: 4904 [2019-11-20 10:01:21,830 WARN L191 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 731 DAG size of output: 563 [2019-11-20 10:06:08,708 WARN L191 SmtUtils]: Spent 4.78 m on a formula simplification. DAG size of input: 4684 DAG size of output: 194 [2019-11-20 10:06:12,562 WARN L191 SmtUtils]: Spent 3.85 s on a formula simplification. DAG size of input: 558 DAG size of output: 32 [2019-11-20 10:06:12,564 INFO L444 ceAbstractionStarter]: For program point L31(lines 31 33) no Hoare annotation was computed. [2019-11-20 10:06:12,565 INFO L444 ceAbstractionStarter]: For program point L31-2(lines 20 40) no Hoare annotation was computed. [2019-11-20 10:06:12,565 INFO L444 ceAbstractionStarter]: For program point L23(line 23) no Hoare annotation was computed. [2019-11-20 10:06:12,565 INFO L444 ceAbstractionStarter]: For program point L7(line 7) no Hoare annotation was computed. [2019-11-20 10:06:12,565 INFO L444 ceAbstractionStarter]: For program point L-1(line -1) no Hoare annotation was computed. [2019-11-20 10:06:12,565 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-20 10:06:12,565 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-20 10:06:12,565 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2019-11-20 10:06:12,565 INFO L444 ceAbstractionStarter]: For program point L20-2(lines 20 40) no Hoare annotation was computed. [2019-11-20 10:06:12,565 INFO L440 ceAbstractionStarter]: At program point L41(lines 15 42) the Hoare annotation is: false [2019-11-20 10:06:12,565 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-20 10:06:12,566 INFO L444 ceAbstractionStarter]: For program point L25-1(lines 20 40) no Hoare annotation was computed. [2019-11-20 10:06:12,566 INFO L444 ceAbstractionStarter]: For program point L34-1(lines 34 37) no Hoare annotation was computed. [2019-11-20 10:06:12,566 INFO L444 ceAbstractionStarter]: For program point L22-2(lines 22 24) no Hoare annotation was computed. [2019-11-20 10:06:12,567 INFO L440 ceAbstractionStarter]: At program point L22-3(lines 22 24) the Hoare annotation is: (let ((.cse9 (<= 1 ULTIMATE.start_main_~st~0)) (.cse15 (<= 1 ~last~0)) (.cse11 (<= 200000 ~SIZE~0))) (let ((.cse2 (and .cse9 .cse15 .cse11)) (.cse12 (<= ULTIMATE.start_main_~d~0 0))) (let ((.cse31 (and .cse2 .cse12))) (let ((.cse24 (and .cse31 (not (= 0 ULTIMATE.start___VERIFIER_assert_~cond)))) (.cse5 (<= ULTIMATE.start_main_~c~0 ~last~0))) (let ((.cse13 (= ULTIMATE.start_main_~b~0 0)) (.cse8 (and .cse24 .cse5)) (.cse30 (<= 9 ULTIMATE.start_main_~c~0)) (.cse34 (<= 10 ULTIMATE.start_main_~c~0)) (.cse17 (= ULTIMATE.start_main_~st~0 0)) (.cse3 (<= ~last~0 7)) (.cse4 (= ULTIMATE.start_main_~st~0 1)) (.cse25 (<= ULTIMATE.start_main_~c~0 5)) (.cse22 (<= 5 ULTIMATE.start_main_~c~0)) (.cse35 (<= 8 ULTIMATE.start_main_~c~0)) (.cse36 (<= ULTIMATE.start_main_~c~0 8)) (.cse1 (<= ULTIMATE.start_main_~d~0 1)) (.cse19 (<= ULTIMATE.start_main_~c~0 2)) (.cse16 (<= (+ ~last~0 1) ULTIMATE.start_main_~c~0)) (.cse21 (<= 6 ULTIMATE.start_main_~c~0)) (.cse32 (<= 4 ULTIMATE.start_main_~c~0)) (.cse33 (<= ULTIMATE.start_main_~c~0 4)) (.cse29 (<= 1 ULTIMATE.start_main_~c~0)) (.cse37 (and (<= ULTIMATE.start_main_~c~0 1) .cse9 .cse15)) (.cse38 (* 3 ULTIMATE.start_main_~c~0)) (.cse20 (* 2 ~SIZE~0)) (.cse18 (<= 2 ULTIMATE.start_main_~c~0)) (.cse39 (<= 7 ULTIMATE.start_main_~c~0)) (.cse28 (<= 0 ULTIMATE.start_main_~c~0)) (.cse7 (= 1 ULTIMATE.start___VERIFIER_assert_~cond)) (.cse27 (<= ULTIMATE.start_main_~c~0 0)) (.cse26 (<= 11 ULTIMATE.start_main_~c~0)) (.cse23 (<= ULTIMATE.start_main_~c~0 ~SIZE~0)) (.cse14 (= ULTIMATE.start_main_~a~0 0)) (.cse0 (<= 3 ULTIMATE.start_main_~c~0)) (.cse6 (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~a~0)) (.cse10 (<= ULTIMATE.start_main_~c~0 3))) (or (and .cse0 (and (and .cse1 .cse2 .cse3) .cse4 .cse5) .cse6 .cse7) (and .cse6 .cse7 .cse8 (<= ULTIMATE.start_main_~c~0 13) (<= 13 ULTIMATE.start_main_~c~0)) (and .cse0 .cse6 .cse7 (and (and (and .cse9 .cse10 .cse11) .cse12) .cse5)) (and .cse13 .cse14 (< ULTIMATE.start_main_~c~0 (+ ~SIZE~0 1)) .cse15 .cse16 .cse11 .cse17 .cse12) (and .cse6 .cse18 .cse7 (and (and (and .cse9 .cse19 .cse11) .cse12) .cse5)) (and .cse15 .cse19 .cse12 .cse13 .cse14 (<= (+ (* 2 ~last~0) 400000) (+ ULTIMATE.start_main_~c~0 .cse20)) .cse16) (and (and .cse4 (and .cse19 (and .cse1 .cse2) .cse3)) .cse6 .cse18 .cse7) (and .cse8 .cse6 .cse21 .cse7 (<= ULTIMATE.start_main_~c~0 6)) (and .cse14 .cse6 .cse22 .cse9 .cse5 (<= (+ ULTIMATE.start_main_~c~0 199995) ~SIZE~0) .cse12) (and .cse6 .cse7 (and (= ULTIMATE.start_main_~c~0 0) .cse4 (and (and .cse1 (<= (+ ULTIMATE.start_main_~c~0 200000) ~SIZE~0) .cse15) .cse3))) (and .cse6 .cse23 .cse8 .cse7 (<= 14 ULTIMATE.start_main_~c~0)) (and .cse6 .cse23 (and (and .cse1 .cse15 .cse16 .cse17) .cse3) .cse7 .cse11) (and (<= 12 ULTIMATE.start_main_~c~0) (and .cse24 (<= ULTIMATE.start_main_~c~0 12) .cse5) .cse6 .cse7) (and .cse6 .cse7 (and (and (<= ~last~0 5) (and .cse1 .cse2 .cse25)) .cse22)) (and .cse26 .cse6 .cse7 (and (<= ULTIMATE.start_main_~c~0 11) .cse24 .cse5)) (and .cse14 .cse6 .cse15 .cse9 .cse27 (<= (+ ULTIMATE.start_main_~c~0 400000) .cse20) .cse28 .cse12) (and .cse14 .cse6 .cse9 (<= (+ ULTIMATE.start_main_~c~0 199999) ~SIZE~0) .cse29 .cse5 .cse12) (and .cse14 .cse6 .cse30 .cse9 .cse23 (<= (+ ULTIMATE.start_main_~c~0 399991) .cse20) .cse5 .cse12) (and (and .cse24 .cse5 (<= ULTIMATE.start_main_~c~0 9)) .cse6 .cse30 .cse7) (and .cse6 (and .cse31 .cse5) .cse7 .cse32 .cse33) (and .cse14 .cse6 .cse9 .cse23 (<= (+ ULTIMATE.start_main_~c~0 399990) .cse20) .cse34 .cse5 .cse12) (and .cse6 (and .cse24 .cse5 (<= ULTIMATE.start_main_~c~0 10)) .cse7 .cse34) (and (and .cse15 .cse16 .cse17 .cse12) .cse6 .cse23 .cse7 .cse11) (and .cse6 .cse7 .cse35 .cse36 .cse5 .cse31) (and .cse6 (and (and (and .cse1 .cse37) .cse3) .cse4) .cse7 .cse29 .cse11) (and .cse6 (and .cse25 .cse2 .cse12) .cse7 .cse22) (and .cse14 .cse6 .cse9 (<= (+ ULTIMATE.start_main_~c~0 399992) .cse20) .cse35 .cse36 .cse5 .cse12) (and .cse6 (and (and .cse1 (and .cse19 .cse15 .cse16)) (<= (+ .cse38 399994) .cse20)) .cse7) (and .cse14 .cse6 .cse21 .cse9 (<= (+ ULTIMATE.start_main_~c~0 199994) ~SIZE~0) .cse5 .cse12) (and .cse14 .cse6 .cse9 (<= (+ ULTIMATE.start_main_~c~0 399996) .cse20) .cse32 .cse5 .cse33 .cse12) (and .cse6 .cse7 .cse29 (and .cse37 .cse11 .cse12)) (and .cse14 .cse6 .cse9 .cse39 (<= (+ .cse38 399979) .cse20) .cse5 .cse12) (and .cse14 .cse6 (<= (+ ULTIMATE.start_main_~c~0 199998) ~SIZE~0) .cse9 .cse18 .cse5 .cse12) (and (and (<= ULTIMATE.start_main_~c~0 7) .cse5 .cse31) .cse6 .cse7 .cse39) (and .cse6 .cse28 .cse7 (and .cse9 .cse27 .cse15 .cse11 .cse12)) (and .cse14 .cse26 .cse6 .cse11 .cse9 .cse23 .cse5 .cse12) (and .cse14 .cse0 .cse6 .cse11 .cse9 .cse10 .cse5 .cse12))))))) [2019-11-20 10:06:12,568 INFO L444 ceAbstractionStarter]: For program point L22-4(lines 20 40) no Hoare annotation was computed. [2019-11-20 10:06:12,568 INFO L444 ceAbstractionStarter]: For program point L6(lines 6 8) no Hoare annotation was computed. [2019-11-20 10:06:12,568 INFO L440 ceAbstractionStarter]: At program point L6-2(lines 5 40) the Hoare annotation is: (let ((.cse5 (<= 200000 ~SIZE~0)) (.cse3 (<= ULTIMATE.start_main_~d~0 0)) (.cse0 (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~a~0)) (.cse1 (<= ULTIMATE.start_main_~c~0 ~SIZE~0)) (.cse4 (= 1 ULTIMATE.start___VERIFIER_assert_~cond)) (.cse2 (<= 1 ~last~0)) (.cse6 (<= ~SIZE~0 ULTIMATE.start_main_~c~0))) (or (and .cse0 .cse1 (and .cse2 .cse3) .cse4 .cse5 .cse6) (and (= ULTIMATE.start_main_~a~0 0) (<= ULTIMATE.start_main_~c~0 0) .cse0 (<= 0 ULTIMATE.start_main_~c~0) .cse5 (< ULTIMATE.start_main_~c~0 ~last~0) .cse3) (and .cse0 .cse1 .cse4 (and (and (<= ULTIMATE.start_main_~d~0 1) .cse2) (<= 200000 ULTIMATE.start_main_~c~0) (<= ~last~0 7)) .cse6))) [2019-11-20 10:06:12,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 10:06:12 BoogieIcfgContainer [2019-11-20 10:06:12,624 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-20 10:06:12,625 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 10:06:12,625 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 10:06:12,625 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 10:06:12,626 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:57:06" (3/4) ... [2019-11-20 10:06:12,630 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-20 10:06:12,642 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2019-11-20 10:06:12,642 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-20 10:06:12,696 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_26f463c5-ba64-45ad-9005-5020e8eb6451/bin/uautomizer/witness.graphml [2019-11-20 10:06:12,696 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 10:06:12,698 INFO L168 Benchmark]: Toolchain (without parser) took 547107.52 ms. Allocated memory was 1.0 GB in the beginning and 3.0 GB in the end (delta: 2.0 GB). Free memory was 951.5 MB in the beginning and 923.2 MB in the end (delta: 28.3 MB). Peak memory consumption was 2.0 GB. Max. memory is 11.5 GB. [2019-11-20 10:06:12,698 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 10:06:12,699 INFO L168 Benchmark]: CACSL2BoogieTranslator took 317.91 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 147.3 MB). Free memory was 951.5 MB in the beginning and 1.1 GB in the end (delta: -190.5 MB). Peak memory consumption was 23.4 MB. Max. memory is 11.5 GB. [2019-11-20 10:06:12,699 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.15 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 10:06:12,699 INFO L168 Benchmark]: Boogie Preprocessor took 18.55 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 10:06:12,700 INFO L168 Benchmark]: RCFGBuilder took 413.68 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. [2019-11-20 10:06:12,700 INFO L168 Benchmark]: TraceAbstraction took 546247.56 ms. Allocated memory was 1.2 GB in the beginning and 3.0 GB in the end (delta: 1.8 GB). Free memory was 1.1 GB in the beginning and 936.4 MB in the end (delta: 181.9 MB). Peak memory consumption was 4.4 GB. Max. memory is 11.5 GB. [2019-11-20 10:06:12,701 INFO L168 Benchmark]: Witness Printer took 71.75 ms. Allocated memory is still 3.0 GB. Free memory was 936.4 MB in the beginning and 923.2 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 11.5 GB. [2019-11-20 10:06:12,703 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 317.91 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 147.3 MB). Free memory was 951.5 MB in the beginning and 1.1 GB in the end (delta: -190.5 MB). Peak memory consumption was 23.4 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 30.15 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 18.55 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 413.68 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 546247.56 ms. Allocated memory was 1.2 GB in the beginning and 3.0 GB in the end (delta: 1.8 GB). Free memory was 1.1 GB in the beginning and 936.4 MB in the end (delta: 181.9 MB). Peak memory consumption was 4.4 GB. Max. memory is 11.5 GB. * Witness Printer took 71.75 ms. Allocated memory is still 3.0 GB. Free memory was 936.4 MB in the beginning and 923.2 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: 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: 22]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((((((((((((3 <= c && (((d <= 1 && (1 <= st && 1 <= last) && 200000 <= SIZE) && last <= 7) && st == 1) && c <= last) && b == a) && 1 == cond) || ((((b == a && 1 == cond) && ((((1 <= st && 1 <= last) && 200000 <= SIZE) && d <= 0) && !(0 == cond)) && c <= last) && c <= 13) && 13 <= c)) || (((3 <= c && b == a) && 1 == cond) && (((1 <= st && c <= 3) && 200000 <= SIZE) && d <= 0) && c <= last)) || (((((((b == 0 && a == 0) && c < SIZE + 1) && 1 <= last) && last + 1 <= c) && 200000 <= SIZE) && st == 0) && d <= 0)) || (((b == a && 2 <= c) && 1 == cond) && (((1 <= st && c <= 2) && 200000 <= SIZE) && d <= 0) && c <= last)) || ((((((1 <= last && c <= 2) && d <= 0) && b == 0) && a == 0) && 2 * last + 400000 <= c + 2 * SIZE) && last + 1 <= c)) || ((((st == 1 && (c <= 2 && d <= 1 && (1 <= st && 1 <= last) && 200000 <= SIZE) && last <= 7) && b == a) && 2 <= c) && 1 == cond)) || (((((((((1 <= st && 1 <= last) && 200000 <= SIZE) && d <= 0) && !(0 == cond)) && c <= last) && b == a) && 6 <= c) && 1 == cond) && c <= 6)) || ((((((a == 0 && b == a) && 5 <= c) && 1 <= st) && c <= last) && c + 199995 <= SIZE) && d <= 0)) || ((b == a && 1 == cond) && (c == 0 && st == 1) && ((d <= 1 && c + 200000 <= SIZE) && 1 <= last) && last <= 7)) || ((((b == a && c <= SIZE) && ((((1 <= st && 1 <= last) && 200000 <= SIZE) && d <= 0) && !(0 == cond)) && c <= last) && 1 == cond) && 14 <= c)) || ((((b == a && c <= SIZE) && (((d <= 1 && 1 <= last) && last + 1 <= c) && st == 0) && last <= 7) && 1 == cond) && 200000 <= SIZE)) || (((12 <= c && (((((1 <= st && 1 <= last) && 200000 <= SIZE) && d <= 0) && !(0 == cond)) && c <= 12) && c <= last) && b == a) && 1 == cond)) || ((b == a && 1 == cond) && (last <= 5 && (d <= 1 && (1 <= st && 1 <= last) && 200000 <= SIZE) && c <= 5) && 5 <= c)) || (((11 <= c && b == a) && 1 == cond) && (c <= 11 && (((1 <= st && 1 <= last) && 200000 <= SIZE) && d <= 0) && !(0 == cond)) && c <= last)) || (((((((a == 0 && b == a) && 1 <= last) && 1 <= st) && c <= 0) && c + 400000 <= 2 * SIZE) && 0 <= c) && d <= 0)) || ((((((a == 0 && b == a) && 1 <= st) && c + 199999 <= SIZE) && 1 <= c) && c <= last) && d <= 0)) || (((((((a == 0 && b == a) && 9 <= c) && 1 <= st) && c <= SIZE) && c + 399991 <= 2 * SIZE) && c <= last) && d <= 0)) || (((((((((1 <= st && 1 <= last) && 200000 <= SIZE) && d <= 0) && !(0 == cond)) && c <= last) && c <= 9) && b == a) && 9 <= c) && 1 == cond)) || ((((b == a && (((1 <= st && 1 <= last) && 200000 <= SIZE) && d <= 0) && c <= last) && 1 == cond) && 4 <= c) && c <= 4)) || (((((((a == 0 && b == a) && 1 <= st) && c <= SIZE) && c + 399990 <= 2 * SIZE) && 10 <= c) && c <= last) && d <= 0)) || (((b == a && (((((1 <= st && 1 <= last) && 200000 <= SIZE) && d <= 0) && !(0 == cond)) && c <= last) && c <= 10) && 1 == cond) && 10 <= c)) || (((((((1 <= last && last + 1 <= c) && st == 0) && d <= 0) && b == a) && c <= SIZE) && 1 == cond) && 200000 <= SIZE)) || (((((b == a && 1 == cond) && 8 <= c) && c <= 8) && c <= last) && ((1 <= st && 1 <= last) && 200000 <= SIZE) && d <= 0)) || ((((b == a && ((d <= 1 && (c <= 1 && 1 <= st) && 1 <= last) && last <= 7) && st == 1) && 1 == cond) && 1 <= c) && 200000 <= SIZE)) || (((b == a && (c <= 5 && (1 <= st && 1 <= last) && 200000 <= SIZE) && d <= 0) && 1 == cond) && 5 <= c)) || (((((((a == 0 && b == a) && 1 <= st) && c + 399992 <= 2 * SIZE) && 8 <= c) && c <= 8) && c <= last) && d <= 0)) || ((b == a && (d <= 1 && (c <= 2 && 1 <= last) && last + 1 <= c) && 3 * c + 399994 <= 2 * SIZE) && 1 == cond)) || ((((((a == 0 && b == a) && 6 <= c) && 1 <= st) && c + 199994 <= SIZE) && c <= last) && d <= 0)) || (((((((a == 0 && b == a) && 1 <= st) && c + 399996 <= 2 * SIZE) && 4 <= c) && c <= last) && c <= 4) && d <= 0)) || (((b == a && 1 == cond) && 1 <= c) && (((c <= 1 && 1 <= st) && 1 <= last) && 200000 <= SIZE) && d <= 0)) || ((((((a == 0 && b == a) && 1 <= st) && 7 <= c) && 3 * c + 399979 <= 2 * SIZE) && c <= last) && d <= 0)) || ((((((a == 0 && b == a) && c + 199998 <= SIZE) && 1 <= st) && 2 <= c) && c <= last) && d <= 0)) || (((((c <= 7 && c <= last) && ((1 <= st && 1 <= last) && 200000 <= SIZE) && d <= 0) && b == a) && 1 == cond) && 7 <= c)) || (((b == a && 0 <= c) && 1 == cond) && (((1 <= st && c <= 0) && 1 <= last) && 200000 <= SIZE) && d <= 0)) || (((((((a == 0 && 11 <= c) && b == a) && 200000 <= SIZE) && 1 <= st) && c <= SIZE) && c <= last) && d <= 0)) || (((((((a == 0 && 3 <= c) && b == a) && 200000 <= SIZE) && 1 <= st) && c <= 3) && c <= last) && d <= 0) - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: ((((((b == a && c <= SIZE) && 1 <= last && d <= 0) && 1 == cond) && 200000 <= SIZE) && SIZE <= c) || ((((((a == 0 && c <= 0) && b == a) && 0 <= c) && 200000 <= SIZE) && c < last) && d <= 0)) || ((((b == a && c <= SIZE) && 1 == cond) && ((d <= 1 && 1 <= last) && 200000 <= c) && last <= 7) && SIZE <= c) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 1 error locations. Result: SAFE, OverallTime: 546.1s, OverallIterations: 38, TraceHistogramMax: 51, AutomataDifference: 86.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 427.7s, HoareTripleCheckerStatistics: 524 SDtfs, 12427 SDslu, 3036 SDs, 0 SdLazy, 29661 SolverSat, 4517 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 15.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5212 GetRequests, 2065 SyntacticMatches, 1 SemanticMatches, 3146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184289 ImplicationChecksByTransitivity, 84.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1289occurred in iteration=37, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.5s AutomataMinimizationTime, 38 MinimizatonAttempts, 12594 StatesRemovedByMinimization, 37 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 1075 NumberOfFragments, 1194 HoareAnnotationTreeSize, 3 FomulaSimplifications, 50723571251165 FormulaSimplificationTreeSizeReduction, 136.9s HoareSimplificationTime, 3 FomulaSimplificationsInter, 1703590241979 FormulaSimplificationTreeSizeReductionInter, 290.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 21.2s InterpolantComputationTime, 4680 NumberOfCodeBlocks, 4101 NumberOfCodeBlocksAsserted, 143 NumberOfCheckSat, 4610 ConstructedInterpolants, 0 QuantifiedInterpolants, 2746438 SizeOfPredicates, 128 NumberOfNonLiveVariables, 3777 ConjunctsInSsa, 447 ConjunctsInUnsatCore, 70 InterpolantComputations, 11 PerfectInterpolantSequences, 20494/50292 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...